Columbia Government Money Market Fund N-CSRS Certified semi-annual shareholder report (management investment company)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT

INVESTMENT COMPANIES

Investment Company Act file number 811-2650

Seligman Cash Management Fund, Inc.

(Exact name of Registrant as specified in charter)

100 Park Avenue

New York, New York 10017

(Address of principal executive offices) (Zip code)

Lawrence P. Vogel

100 Park Avenue

New York, New York 10017

(Name and address of agent for service)

Registrant’s telephone number, including area code: (212) 850-1864

Date of fiscal year end: 12/31

Date of reporting period: 6/30/06

FORM N-CSR

ITEM 1. REPORTS TO STOCKHOLDERS.

Experience

Seligman has been in business for more than 140 years, at times playing a central role in the financial development of the country and its markets. Over that time, the firm has managed clients’ wealth through dramatic market changes and has remained a consistent, reliable presence on Wall Street. Today, Seligman is drawing on its long history and long-term perspective as we focus on the future and on developing investment solutions that help clients arrive at their goals.

Insight

Asset management is driven by insight — into the direction of the economy, how companies will perform, how markets will behave, and how investors will respond. Portfolio managers at the firm have been in the investment business, on average, for more than 20 years. Over that time, they have refined their ability to assess a company’s prospects, management, and products, while also weighing the impact of economic and market cycles, new trends, and developing technologies. The result is a high aptitude for picking promising stocks and employing rigorous investment processes designed to offer solid long-term results.

Solutions

Seligman’s commitment to the development of innovative investment products — including the nation’s first growth mutual fund, pioneering single-state municipal funds, and one of the country’s premier technology funds — defines our past and informs our future. Our ongoing research into the nature of investment risk — begun in the early 1990s — has resulted in the Seligman Time Horizon Matrix asset allocation strategy that redefines the relationship between risk and reward over time. The strategy offers investors a variety of investment solutions for goals ranging from college savings to retirement planning. Whether you select Seligman for one investment product, or as a comprehensive asset manager, we believe we can help you reach your goals.

Table of Contents

To The Shareholders	1
Portfolio Overview	2
Understanding and Comparing Your Fund’s Expenses	3
Portfolio of Investments	4
Statement of Assets and Liabilities	5
Statement of Operations	6
Statements of Changes in Net Assets	7
Notes to Financial Statements	8
Financial Highlights	14
Board of Directors and Executive Officers	20
Additional Fund Information	21

To The Shareholders

Your mid-year shareholder report for Seligman Cash Management Fund, Inc. follows this letter. This report contains the Fund’s portfolio of investments and financial statements.

We are pleased to announce that, effective April 7, 2006, Francis L. Mustaro joined Seligman as the Fund’s Portfolio Manager. Mr. Mustaro was previously a Managing Director and Senior Portfolio Manager in the Core Fixed Income Group of Citigroup Asset Management, where he was responsible for managing $2.2 billion in government, corporate, asset-backed, and mortgage-backed securities for defined contribution, insurance, mutual fund, and central bank clients.

We thank you for your continued support of Seligman Cash Management Fund and look forward to serving your investment needs for many years to come.

By order of the Board of Directors,

William C. Morris
Chairman
 

Brian T. Zino
President

August 9, 2006

Manager	Shareholder Service Agent	Important Telephone Numbers
J. & W. Seligman & Co. Incorporated 100 Park Avenue New York, NY 10017   General Distributor Seligman Advisors, Inc. 100 Park Avenue New York, NY 10017	Seligman Data Corp. 100 Park Avenue New York, NY 10017 General Counsel Sullivan & Cromwell LLP	(800) 221-2450 (800) 445-1777 (212) 682-7600 (800) 622-4597	Shareholder Services   Retirement Plan Services   Outside the United States   24-Hour Automated   Telephone Access Service

1

Portfolio Overview

Diversification of Net Assets

			Percent of Net Assets
	Value		June 30, 2006		December 31, 2005
US Government Securities	$	84,837,564		46.2		45.2
Time Deposits		54,800,000		29.9		40.0
Repurchase Agreement		43,681,000		23.8		23.5
Other Assets Less Liabilities		199,623		0.1		(8.7	)
Net Assets	$	183,518,187		100.0		100.0

2

Understanding and Comparing
Your Fund’s Expenses

As a shareholder of the Fund, you incur ongoing expenses, such as management fees, distribution and service (12b-1) fees, and other fund expenses. The information below is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare them with the ongoing expenses of investing in other mutual funds. Please note that the expenses shown in the table are meant to highlight your ongoing expenses only and do not reflect any transactional costs, such as sales charges (also known as loads) on certain purchases or redemptions. Therefore, the table is useful in comparing ongoing expenses only, and will not help you to determine the relative total expenses of owning different funds. In addition, if transactional costs were included, your total expenses would have been higher.

The table is based on an investment of $1,000 invested at the beginning of January 1, 2006 and held for the entire six-month period ended June 30, 2006.

Actual Expenses

The table below provides information about actual expenses and actual account values. You may use the information, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value at the beginning of the period by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number under the heading entitled “Expenses Paid During Period” for the Fund’s share class that you own to estimate the expenses that you paid on your account during the period.

Hypothetical Example for Comparison Purposes

The table below also provides information about hypothetical expenses and hypothetical account values based on the actual expense ratio of each class and an assumed rate of return of 5% per year before expenses, which is not the actual return of any class of the Fund. The hypothetical expenses and account values may not be used to estimate the ending account value or the actual expenses you paid for the period. You may use this information to compare the ongoing expenses of investing in the Fund and other mutual funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other mutual funds.

						Actual				Hypothetical
	Beginning Account Value 1/1/06		Annualized Expense Ratio*			Ending Account Value 6/30/06		Expenses Paid During Period** 1/1/06 to 6/30/06		Ending Account Value 6/30/06		Expenses Paid During Period** 1/1/06 to 6/30/06
Class A	$	1,000.00		0.90	%	$	1,017.80	$	4.50	$	1,020.33	$	4.51
Class B		1,000.00		1.90			1,012.60		9.48		1,015.37		9.49
Class C		1,000.00		1.52			1,014.50		7.59		1,017.26		7.60
Class D		1,000.00		1.90			1,012.60		9.48		1,015.37		9.49
Class I		1,000.00		0.60			1,019.30		3.00		1,021.82		3.01
Class R		1,000.00		1.15			1,016.60		5.75		1,019.09		5.76

*   Expenses of Class B, Class C, Class D, Class I and Class R shares differ from the expenses of Class A shares due to the differences in 12b-1 fees and other class-specific expenses paid by each share class. See the Fund’s prospectus for a description of each share class and its fees, expenses and sales charges.

**   Expenses are equal to the annualized expense ratio based on actual expenses for the period January 1, 2006 to June 30, 2006, multiplied by the average account value over the period, multiplied by 181/365 (number of days in the period).

3

Portfolio of Investments (unaudited)
June 30, 2006

	Annualized Yield on Purchase Date			Principal Amount		Value
US Government Securities  46.2%
US Treasury Bills:
4.769%, due 7/6/2006		4.84	%	$	15,000,000	$	14,990,562
4.637%, due 7/6/2006		4.70			10,000,000		9,993,660
4.703%, due 7/13/2006		4.77			15,000,000		14,976,950
4.755%, due 7/20/2006		4.82			15,000,000		14,963,302
4.696%, due 7/20/2006		4.76			15,000,000		14,963,465
4.764%, due 7/27/2006		4.83			15,000,000		14,949,625
Total US Government Securities  (Cost $84,837,564)							84,837,564
Time Deposits  29.9%
Bank of Montreal 5.03%, 7/3/2006		5.10			9,200,000		9,200,000
BNP Paribas, Grand Cayman, 5.28%, 7/3/2006		5.35			9,100,000		9,100,000
Citibank, Nassau, 5.1%, 7/5/2006		5.17			9,100,000		9,100,000
Dexia Bank, Grand Cayman, 5.07%, 7/3/2006		5.14			9,100,000		9,100,000
Rabobank Nederland, Grand Cayman, 5.01%, 7/3/2006		5.08			9,200,000		9,200,000
Royal Bank of Scotland Group, 5.25%, 7/5/2006		5.32			9,100,000		9,100,000
Total Time Deposits  (Cost $54,800,000)							54,800,000
Repurchase Agreement  23.8%
State Street Bank 4.15%, dated 6/30/2006, maturing 7/3/2006 in the amount of $43,696,106 collateralized by: $44,220,000 US Treasury Notes 6.5%, 10/15/2006, with a fair market value of $44,993,850 (Cost $43,681,000)		4.21			43,681,000		43,681,000
Total Investments 99.9%  (Cost $183,318,564)							183,318,564
Other Assets Less Liabilities  0.1%							199,623
Net Assets  100.0%						$	183,518,187

See Notes to Financial Statements.

4

Statement of Assets and Liabilities  (unaudited)
June 30, 2006

Assets:
Investments, at value
US Government securities (cost $84,837,564)	$	84,837,564
Time deposits (cost $54,800,000)		54,800,000
Repurchase agreement (cost $43,681,000)		43,681,000
Total investments (cost $183,318,564)		183,318,564
Cash (includes restricted cash of $37,555)		77,800
Receivable for Capital Stock sold		826,714
Investment in, and expenses prepaid to, shareholder service agent		26,890
Receivable for interest		20,582
Other		15,726
Total Assets		184,286,276
Liabilities:
Payable for Capital Stock repurchased		539,334
Dividends payable		100,609
Management fee payable		62,484
Distribution and service (12b-1) fees payable		24,817
Accrued expenses and other		40,845
Total Liabilities		768,089
Net Assets	$	183,518,187
Composition of Net Assets:
Shares of Capital Stock, at par ($0.01 par value; 1,400,000,000 shares authorized; 183,526,412 shares outstanding):
Class A	$	1,394,852
Class B		126,168
Class C		49,600
Class D		141,897
Class I		117,455
Class R		5,292
Additional paid-in capital		181,682,923
Net Assets	$	183,518,187
Net Asset Value Per Share:
Class A ($139,475,188 ÷ 139,485,224 shares)	$	1.00
Class B ($12,618,518 ÷ 12,616,750 shares)	$	1.00
Class C ($4,959,653 ÷ 4,959,979 shares)	$	1.00
Class D ($14,190,196 ÷ 14,189,728 shares)	$	1.00
Class I ($11,745,392 ÷ 11,745,491 shares)	$	1.00
Class R ($529,240 ÷ 529,240 shares)	$	1.00

See Notes to Financial Statements.

5

Statement of Operations  (unaudited)
For the Six Months Ended June 30, 2006

Investment Income:
Interest	$	3,853,691
Expenses:
Management fee		357,780
Shareholder account services		279,221
Distribution and service (12b-1) fees		137,161
Registration		46,036
Auditing and legal fees		24,856
Custody and related services		24,488
Shareholder reports and communications		13,881
Directors’ fees and expenses		3,966
Miscellaneous		10,801
Total Expenses		898,190
Net Investment Income	$	2,955,501

See Notes to Financial Statements.

6

Statements of Changes in Net Assets (unaudited)
    
    

	Six Months Ended June 30, 2006			Year Ended December 31, 2005
Operations:
Net investment income	$	2,955,501		$	4,051,361
Distributions to Shareholders:
Net investment income:
Class A		(2,366,868	)		(3,335,187	)
Class B		(148,589	)		(187,582	)
Class C		(57,643	)		(77,510	)
Class D		(168,061	)		(155,055	)
Class I		(206,027	)		(289,641	)
Class R		(8,313	)		(6,386	)
Decrease in Net Assets from Distributions		(2,955,501	)		(4,051,361	)
Capital Share Transactions:
Net proceeds from sales of shares		116,127,257			228,882,852
Investment of dividends		2,834,251			3,839,051
Exchanged from associated funds		33,147,781			71,150,889
Total		152,109,289			303,872,792
Cost of shares repurchased		(131,926,060	)		(273,862,149	)
Exchanged into associated funds		(12,877,510	)		(48,001,122	)
Total		(144,803,570	)		(321,863,271	)
Increase (Decrease) in Net Assets from Capital Share Transactions		7,305,719			(17,990,479	)
Increase (Decrease) in Net Assets		7,305,719			(17,990,479	)
Net Assets:
Beginning of period		176,212,468			194,202,947
End of Period	$	183,518,187		$	176,212,468

See Notes to Financial Statements.

7

Notes to Financial Statements  (unaudited)

1. Multiple Classes of Shares — Seligman Cash Management Fund, Inc. (the “Fund”) offers the following six classes of shares, each of which may be acquired by investors at net asset value:

Class A shares acquired by an exchange from another Seligman investment company originally purchased in an amount of $1,000,000 or more without an initial sales charge are subject to a contingent deferred sales charge (“CDSC”) of 1% if redeemed within 18 months of original purchase.

Class B shares are subject to a distribution fee of 0.75% and a service fee of up to 0.25% on an annual basis, and a CDSC, if applicable, of 5% on redemptions in the first year of purchase, declining to 1% in the sixth year and 0% thereafter. Class B shares will automatically convert to Class A shares approximately eight years after their date of purchase. If Class B shares of the Fund are exchanged for Class B shares of another Seligman mutual fund, the holding period of the shares exchanged will be added to the holding period of the shares acquired, both for determining the applicable CDSC and the conversion of Class B shares to Class A shares.

Class C shares acquired by an exchange from another Seligman mutual fund are subject to a distribution fee of up to 0.75% and a service fee of up to 0.25% on an annual basis, and a CDSC, if applicable, of 1% imposed on redemptions made within 18 months of the original purchase. Shares acquired by an exchange from another Seligman mutual fund, that were originally purchased through certain financial intermediaries, will have a 1% CDSC on redemptions made within 12 months of original purchase.

Class D shares are subject to a distribution fee of up to 0.75% and a service fee of up to 0.25% on an annual basis, and a CDSC, if applicable, of 1% imposed on redemptions made within one year of purchase.

Class I shares are offered to certain institutional clients and other investors, as described in the Fund’s prospectus. Class I shares are sold without any sales charges and are not subject to distribution and service (12b-1) fees.

Class R shares are offered to certain employee benefit plans and are not available to all investors. They are subject to a distribution fee of up to 0.25% and a service fee of up to 0.25% on an annual basis, and a CDSC, if applicable, of 1% on certain redemptions made within one year of a plan’s initial purchase of Class R shares.

All classes of shares represent interests in the same portfolio of investments, have the same rights, and are generally identical in all respects except that each class bears its own class-specific expenses, and has exclusive voting rights with respect to any matter on which a separate vote of any class is required.

2. Significant Accounting Policies — The financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America, which require management to make certain estimates and assumptions at the date of the financial statements. Actual results may differ from these estimates. These unaudited interim financial statements reflect all adjustments which are, in the opinion of management, necessary to a fair statement of the results for the interim periods presented. All such adjustments are of a normal recurring nature. The following summarizes the significant accounting policies of the Fund:

a. Security Valuation — The Fund uses the amortized cost method for valuing its short-term securities. Under this method, all investments purchased at a discount or premium are valued by amortizing the difference between the original purchase price and the maturity value of the issue over the period to maturity.

b. Federal Taxes — There is no provision for federal income tax. The Fund has elected to be taxed as a regulated investment company and intends to distribute substantially all taxable net income and net gain realized.

8

Notes to Financial Statements  (unaudited)

c. Security Transactions and Related Investment Income — Investment transactions are recorded on trade dates. Identified cost of investments sold is used for both financial reporting and federal income tax purposes. The cost of investments for federal income tax purposes is substantially the same as the cost for financial reporting purposes. Interest income, including the amortization of discount or premium, is recorded on an accrual basis.

d. Repurchase Agreements — The Fund may enter into repurchase agreements. Generally, securities received as collateral subject to repurchase agreements are deposited with the Fund’s custodian and, pursuant to the terms of the repurchase agreements, must have an aggregate market value greater than or equal to the repurchase price plus accrued interest at all times. On a daily basis, the market value of securities held as collateral for repurchase agreements is monitored to ensure the existence of the proper level of collateral.

e. Multiple Class Allocations — All income, expenses (other than class-specific expenses), and realized and unrealized gains or losses, if any, are allocated daily to each class of shares based upon the relative value of shares of each class. Class-specific expenses, which include distribution and service fees and any other items that are specifically attributable to a particular class, are charged directly to such class. For the six months ended June 30, 2006, distribution and service fees, shareholder account services and registration expenses were class-specific expenses.

f. Restricted Cash — Restricted cash represents deposits that are being held by banks as collateral for letters of credit issued in connection with the Fund’s insurance policies.

g. Distributions to Shareholders — Dividends are declared daily and paid monthly.

3. Management Fee, Distribution Services, and Other Transactions — J. & W. Seligman & Co. Incorporated (the “Manager”) manages the affairs of the Fund and provides the necessary personnel and facilities. Compensation of all officers of the Fund, all directors of the Fund who are employees of the Manager, and all personnel of the Fund and the Manager is paid by the Manager. The Manager receives a fee, calculated daily and paid monthly, equal to a per annum percentage of the Fund’s average daily net assets. The management fee rate is calculated on a sliding scale of 0.45% to 0.375% based on average daily net assets of all the investment companies managed by the Manager. The management fee for the six months ended June 30, 2006, was equivalent to an annual rate of 0.41% of the Fund’s average daily net assets.

The Fund has an Administration, Shareholder Services and Distribution Plan (the “Plan”) with respect to distribution of its shares. Under the Plan, with respect to Class A shares, service organizations can enter into agreements with Seligman Advisors, Inc. (the “Distributor”) and receive a continuing fee of up to 0.25% on an annual basis of the average daily net assets of Class A shares, attributable to the particular service organizations for providing personal services and/or the maintenance of shareholder accounts. The Distributor, and likewise the Fund, did not make payments under the Plan with respect to Class A shares during the six months ended June 30, 2006.

Under the Plan, with respect to Class B shares, Class C shares issued in exchange from another Seligman mutual fund, Class D shares and Class R shares, service organizations can enter into agreements with the Distributor and receive a continuing fee for providing personal services and/or the maintenance of shareholder accounts of up to 0.25% on an annual basis of the average daily net assets of the Class B, Class C, Class D, and Class R shares for which the organizations are responsible; and, for Class C, Class D, and Class R shares, fees for providing other distribution assistance of up to 0.75% (0.25%, in the case of Class R shares) on an annual basis of such average daily net assets. Such fees are paid monthly by the Fund to the Distributor pursuant to the Plan.

9

Notes to Financial Statements  (unaudited)

With respect to Class B shares, a distribution fee of 0.75% on an annual basis of average daily net assets is payable monthly by the Fund to the Distributor; however, the Distributor has sold its rights to this fee with respect to a substantial portion of Class B shares to third parties (the “Purchasers”), which provide funding to the Distributor to enable it to pay commissions to dealers at the time of the sale of the related Class B shares. Distribution fees retained by the Distributor, for the six months ended June 30, 2006, amounted to $4.

For the six months ended June 30, 2006, fees incurred under the Plan, equivalent to 1%, 0.62%, 1% and 0.25% per annum of the average daily net assets of Class B, Class C, Class D, and Class R shares, respectively, amounted to $59,111, $12,257, $65,166 and $627, respectively.

The Distributor is entitled to retain any CDSC imposed on certain redemptions of Class A, Class C, Class D, and Class R shares. For the six months ended June 30, 2006, such charges amounted to $4,833. The Distributor has sold its rights to collect any CDSC imposed on redemptions of Class B shares to the Purchasers.

The Distributor and Seligman Services, Inc., also an affiliate of the Manager, are eligible to receive distribution and service fees pursuant to the Plan. For the six months ended June 30, 2006, the Distributor and Seligman Services, Inc. received distribution and service fees of $2,666, pursuant to the Plan.

Seligman Data Corp., owned by the Fund and certain associated investment companies, charged the Fund at cost $279,221 for shareholder account services in accordance with a methodology approved by the Fund’s directors. Class I shares receive more limited shareholder services than the Fund’s other classes of shares (the “Retail Classes”). Seligman Data Corp. does not allocate to Class I the costs of any of its departments that do not provide services to the Class I shareholders.

Costs of Seligman Data Corp. directly attributable to the Retail Classes of the Fund were charged to those classes in proportion to their respective net asset values. Costs directly attributable to Class I shares were charged to Class I. The remaining charges were allocated to the Retail Classes and Class I by Seligman Data Corp. pursuant to a formula based on their net assets, shareholder transaction volumes and number of shareholder accounts.

The Fund and certain other associated investment companies (together, the “Guarantors”) have severally but not jointly guaranteed the performance and observance of all the terms and conditions of two leases entered into by Seligman Data Corp., including the payment of rent by Seligman Data Corp. (the “Guaranties”). The leases and the Guaranties expire in September 2008 and January 2009. The obligation of the Fund to pay any amount due under either Guaranty is limited to a specified percentage of the full amount, which generally is based on the Fund’s percentage of the expenses billed by Seligman Data Corp. to all Guarantors in the preceding calendar quarter. As of June 30, 2006, the Fund’s potential obligation under the Guaranties is $52,200. As of June 30, 2006, no event has occurred which would result in the Fund becoming liable to make any payment under a Guaranty. A portion of rent paid by Seligman Data Corp. is charged to the Fund as part of Seligman Data Corp.’s shareholder account services cost.

The Fund’s investment in Seligman Data Corp. is recorded at a cost of $3,719.

Certain officers and directors of the Fund are officers or directors of the Manager, the Distributor, Seligman Services, Inc., and/or Seligman Data Corp.

The Fund has a compensation arrangement under which directors who receive fees may elect to defer receiving such fees. Directors may elect to have their deferred fees accrue interest or earn a return based on the performance of the Fund or other funds in the Seligman Group of Investment companies. Deferred fees and related accrued earnings are not deductible by the Fund for federal income tax purposes until

10

Notes to Financial Statements  (unaudited)

such amounts are paid. The accumulated balance at December 31, 2005 of $20,493 was paid to the participating director in January 2006. As of June 30, 2006, no directors were participating in the deferred compensation arrangement.

4. Capital Share Transactions — The Fund has authorized 1,400,000,000 shares of $0.01 par value Capital Stock. Transactions in shares of Capital Stock, each at a value of $1.00 per share, were as follows:

Class A	Six Months Ended June 30, 2006			Year Ended December 31, 2005
Sales of shares		109,277,067			214,606,528
Investment of dividends		2,276,709			3,192,128
Exchanged from associated funds		19,907,079			46,986,454
Converted from Class B*		1,195,950			3,397,902
Total		132,656,805			268,183,012
Shares repurchased		(118,377,083	)		(250,701,326	)
Exchanged into associated funds		(7,310,638	)		(28,438,906	)
Total		(125,687,721	)		(279,140,232	)
Increase (decrease)		6,969,084			(10,957,220	)
Class B
Sales of shares		567,840			950,417
Investment of dividends		127,683			154,422
Exchanged from associated funds		5,644,873			12,018,934
Total		6,340,396			13,123,773
Shares repurchased		(2,899,885	)		(9,325,583	)
Exchanged into associated funds		(2,587,790	)		(8,654,732	)
Converted to Class A*		(1,195,109	)		(3,396,939	)
Total		(6,682,784	)		(21,377,254	)
Decrease		(342,388	)		(8,253,481	)
Class C
Sales of shares		301,499			1,306,176
Investment of dividends		51,291			64,444
Exchanged from associated funds		3,036,676			7,068,517
Total		3,389,466			8,439,137
Shares repurchased		(1,933,374	)		(3,478,889	)
Exchanged into associated funds		(744,435	)		(5,405,440	)
Total		(2,677,809	)		(8,884,329	)
Increase (decrease)		711,657			(445,192	)

See footnote on page 12.

11

Notes to Financial Statements  (unaudited)

Class D	Six Months Ended June 30, 2006			Year Ended December 31, 2005
Sales of shares		3,147,840			6,619,105
Investment of dividends		164,716			136,400
Exchanged from associated funds		4,559,153			5,076,984
Total		7,871,709			11,832,489
Shares repurchased		(4,202,899	)		(7,148,469	)
Exchanged into associated funds		(2,234,647	)		(5,502,042	)
Total		(6,437,546	)		(12,650,511	)
Increase (decrease)		1,434,163			(818,022	)
Class I
Sales of shares		2,757,358			4,900,897
Investment of dividends		205,558			286,028
Total		2,962,916			5,186,925
Shares repurchased		(4,459,835	)		(3,200,380	)
Increase (decrease)		(1,496,919	)		1,986,545
Class R
Sales of shares		74,812			499,086
Investment of dividends		8,294			5,629
Total		83,106			504,715
Shares repurchased		(52,984	)		(7,502	)
Increase		30,122			497,213

*   Automatic conversion of Class B shares to Class A shares approximately eight years after the initial purchase date. The amount of dividends accrued on Class B shares between the last dividend payment date and the conversion date is invested in Class A shares and is included in the conversion from Class B amount.

5. Other Matters — In late 2003, the Manager conducted an extensive internal review in response to public announcements concerning frequent trading in shares of open-end mutual funds. As of September 2003, the Manager had one arrangement that permitted frequent trading in the Seligman mutual funds. This arrangement was in the process of being closed down by the Manager before the first proceedings relating to trading practices within the mutual fund industry were publicly announced. Based on a review of the Manager’s records for 2001 through 2003, the Manager identified three other arrangements that had permitted frequent trading in the Seligman mutual funds. All three had already been terminated prior to the end of September 2002.

The results of the Manager’s internal review were presented to the Independent Directors of all the Seligman registered investment companies (the “Seligman Funds”). In order to resolve matters with the Independent Directors relating to the four arrangements that permitted frequent trading, in May 2004 the Manager made payments to three mutual funds and agreed to waive a portion of its management fee with respect to another mutual fund (none of which was Seligman Cash Management Fund).

Since February 2004, the Manager has been in discussions with the New York staff of the Securities and Exchange Commission (“SEC”) and the Office of the New York Attorney General (“Attorney General”) in connection with their review of frequent trading in certain of the Seligman Funds. No late trading is involved. This review was apparently stimulated by the Manager’s voluntary public disclosure of the foregoing arrangements in January 2004. In March 2005, negotiations to settle the matter were initiated by

12

Notes to Financial Statements  (unaudited)

the New York staff of the SEC. After several months of negotiations, tentative agreement was reached, both with the New York staff of the SEC and the Attorney General, on the financial terms of a settlement. However, settlement discussions with the Attorney General ended when the Attorney General sought to impose operating conditions on the Manager that were unacceptable to the Manager, would have applied in perpetuity and were not requested or required by the SEC. Subsequently, the New York staff of the SEC indicated that, in lieu of moving forward under the terms of the tentative financial settlement, the staff was considering recommending to the Commissioners of the SEC the instituting of a formal action against the Manager and the Distributor (together, “Seligman”).

Seligman believes that any action would be both inappropriate and unnecessary, especially in light of the fact that Seligman previously resolved the underlying issue with the Independent Directors of the Seligman Funds and made recompense to the affected Seligman Funds.

Immediately after settlement discussions with the Attorney General ended, the Attorney General issued subpoenas to certain of the Seligman Funds and their directors. The subpoenas seek various Board materials and information relating to the deliberations of the Independent Directors as to the advisory fees paid by the Seligman Funds to the Manager. The Manager has objected to the Attorney General’s seeking of such information and, on September 6, 2005, filed suit in federal district court seeking to enjoin the Attorney General from pursuing a fee inquiry. Seligman believes that the Attorney General’s inquiry is improper because Congress has vested exclusive regulatory oversight of investment company advisory fees in the SEC.

At the end of September 2005, the Attorney General indicated that it intends to file an action at some time in the future alleging, in substance, that the Manager permitted other persons to engage in frequent trading other than the arrangements described above and, as a result, the prospectus disclosure of the Seligman Funds is and has been misleading. Seligman believes any such action would be without merit.

Any resolution of these matters with regulatory authorities may include, but not be limited to, sanctions, penalties, injunctions regarding Seligman, restitution to mutual fund shareholders or changes in procedures. Any penalties or restitution will be paid by Seligman and not by the Seligman Funds.

Seligman does not believe that the foregoing possible actions or any threatened legal actions should have a material adverse impact on the Manager, the Distributor or the Seligman Funds; however, there can be no assurance of this, or that these matters and any related publicity will not result in reduced demand for shares of the Seligman Funds or other adverse consequences.

13

Financial Highlights  (unaudited)

The tables below are intended to help you understand each Class’s financial performance for the periods presented. Certain information reflects financial results for a single share of a Class that was held throughout the periods shown. Per share amounts are calculated using average shares outstanding. Total return shows the rate that you would have earned (or lost) on an investment in each Class, assuming you reinvested all your dividends. Total returns do not reflect any taxes or sales charges and are not annualized for periods of less than one year.

Class A
	Six Months Ended 6/30/06			Year Ended December 31,
				2005			2004			2003			2002			2001
Per Share Data:
Net Asset Value, Beginning of Period	$	1.000		$	1.000		$	1.000		$	1.000		$	1.000		$	1.000
Income from Investment Operations:
Net investment income		0.018			0.022			0.004			0.002			0.007			0.032
Less Distributions:
Dividends from net investment income		(0.018	)		(0.022	)		(0.004	)		(0.002	)		(0.007	)		(0.032	)
Net Asset Value, End of Period	$	1.000		$	1.000		$	1.000		$	1.000		$	1.000		$	1.000
Total Return		1.78	%		2.20	%		0.43	%		0.19	%		0.74	%		3.21	%
Ratios/Supplemental Data:
Net assets, end of period (000s omitted)	$139,475			$132,506			$143,464			$155,944			$220,977			$270,509
Ratio of expenses to average net assets		0.90	%†		0.86	%		0.84	%		0.85	%		0.89	%		0.68	%
Ratio of net investment income to average net assets		3.55	%†		2.15	%		0.40	%		0.19	%		0.74	%		3.16	%
Without expense reimbursement:‡
Ratio of expenses to average net assets								0.85	%		0.86	%					0.74	%
Ratio of net investment income to average net assets								0.39	%		0.18	%					3.10	%

See footnotes on page 19.

14

Financial Highlights  (unaudited)

Class B
	Six Months Ended 6/30/06			Year Ended December 31,
				2005			2004			2003			2002			2001
Per Share Data:
Net Asset Value, Beginning of Period	$	1.000		$	1.000		$	1.000		$	1.000		$	1.000		$	1.000
Income from Investment Operations:
Net investment income		0.012			0.011			0.001			—	**		0.001			0.022
Less Distributions:
Dividends from net investment income		(0.012	)		(0.011	)		(0.001	)		—	**		(0.001	)		(0.022	)
Net Asset Value, End of Period	$	1.000		$	1.000		$	1.000		$	1.000		$	1.000		$	1.000
Total Return		1.26	%		1.11	%	��	0.07	%		0.03	%		0.09	%		2.20	%
Ratios/Supplemental Data:
Net assets, end of period (000s omitted)	$12,619			$12,961			$21,214			$33,026			$53,779			$49,656
Ratio of expenses to average net assets		1.90	%†		1.85	%		1.18	%		1.02	%		1.54	%		1.66	%
Ratio of net investment income to average net assets		2.55	%†		1.16	%		0.07	%		0.03	%		0.09	%		2.18	%
Without expense reimbursement:‡
Ratio of expenses to average net assets					1.86	%		1.85	%		1.86	%		1.89	%		1.74	%
Ratio of net investment income (loss) to average net assets					1.15	%		(0.60	)%		(0.81	)%		(0.26	)%		2.10	%

See footnotes on page 19.

15

Financial Highlights  (unaudited)

Class C
	Six Months Ended 6/30/06			Year Ended December 31,
				2005			2004			2003			2002			2001
Per Share Data:
Net Asset Value, Beginning of Period	$	1.000		$	1.000		$	1.000		$	1.000		$	1.000		$	1.000
Income from Investment Operations:
Net investment income		0.014			0.016			0.001			—	**		0.001			0.023
Less Distributions:
Dividends from net investment income		(0.014	)		(0.016	)		(0.001	)		—	**		(0.001	)		(0.023	)
Net Asset Value, End of Period	$	1.000		$	1.000		$	1.000		$	1.000		$	1.000		$	1.000
Total Return		1.45	%		1.56	%		0.09	%		0.03	%		0.09	%		2.36	%
Ratios/Supplemental Data:
Net assets, end of period (000s omitted)	$4,960			$4,248			$4,693			$7,238			$11,531			$9,204
Ratio of expenses to average net assets		1.52	%†		1.44	%		1.16	%		1.02	%		1.51	%		1.51	%
Ratio of net investment income to average net assets		2.93	%†		1.56	%		0.09	%		0.03	%		0.09	%		2.33	%
Without expense reimbursement:‡
Ratio of expenses to average net assets								1.57	%		1.67	%		1.75	%		1.59	%
Ratio of net investment income (loss) to average net assets								(0.32	)%		(0.62	)%		(0.15	)%		2.25	%

See footnotes on page 19.

16

Financial Highlights  (unaudited)

Class D
	Six Months Ended 6/30/06			Year Ended December 31,
				2005			2004			2003			2002			2001
Per Share Data:
Net Asset Value, Beginning of Period	$	1.000		$	1.000		$	1.000		$	1.000		$	1.000		$	1.000
Income from Investment Operations:
Net investment income		0.012			0.011			0.001			—	**		0.001			0.022
Less Distributions:
Dividends from net investment income		(0.012	)		(0.011	)		(0.001	)		—	**		(0.001	)		(0.022	)
Net Asset Value, End of Period	$	1.000		$	1.000		$	1.000		$	1.000		$	1.000		$	1.000
Total Return		1.26	%		1.11	%		0.07	%		0.03	%		0.09	%		2.20	%
Ratios/Supplemental Data:
Net assets, end of period (000s omitted)	$14,190			$12,756			$13,574			$18,742			$68,127			$22,217
Ratio of expenses to average net assets		1.90	%†		1.85	%		1.18	%		1.02	%		1.54	%		1.66	%
Ratio of net investment income to average net assets		2.55	%†		1.16	%		0.07	%		0.03	%		0.09	%		2.18	%
Without expense reimbursement:‡
Ratio of expenses to average net assets					1.86	%		1.85	%		1.86	%		1.89	%		1.74	%
Ratio of net investment income (loss) to average net assets					1.15	%		(0.60	)%		(0.81	)%		(0.26	)%		2.10	%

See footnotes on page 19.

17

Financial Highlights  (unaudited)

Class I
	Six Months Ended 6/30/06			Year Ended December 31,												11/30/01* to 12/31/01
				2005			2004			2003			2002
Per Share Data:
Net Asset Value, Beginning of Period	$	1.000		$	1.000		$	1.000		$	1.000		$	1.000		$	1.000
Income from Investment Operations:
Net investment income		0.019			0.024			0.007			0.004			0.010			0.001
Less Distributions:
Dividends from net investment income		(0.019	)		(0.024	)		(0.007	)		(0.004	)		(0.010	)		(0.001	)
Net Asset Value, End of Period	$	1.000		$	1.000		$	1.000		$	1.000		$	1.000		$	1.000
Total Return		1.93	%		2.48	%		0.69	%		0.39	%		1.00	%		0.11	%
Ratios/Supplemental Data:
Net assets, end of period (000s omitted)	$11,745			$13,242			$11,256			$9,558			$9,046			$30
Ratio of expenses to average net assets		0.60	%†		0.58	%		0.57	%		0.63	%		0.62	%		0.60	%†
Ratio of net investment income to average net assets		3.85	%†		2.43	%		0.68	%		0.41	%		1.00	%		1.25	%†
Without expense reimbursement:‡
Ratio of expenses to average net assets														0.64	%		1.35	%†
Ratio of net investment income to average net assets														0.98	%		0.50	%†

See footnotes on page 19.

18

Financial Highlights  (unaudited)

Class R
	Six Months Ended 6/30/06			Year Ended December 31,						4/30/03* to 12/31/03
				2005			2004
Per Share Data:
Net Asset Value, Beginning of Period	$	1.000		$	1.000		$	1.000		$	1.000
Income from Investment Operations:
Net investment income		0.016			0.019			0.002			—	**
Less Distributions:
Dividends from net investment income		(0.016	)		(0.019	)		(0.002	)		—	**
Net Asset Value, End of Period	$	1.000		$	1.000		$	1.000		$	1.000
Total Return		1.66	%		1.94	%		0.24	%		0.02	%
Ratios/Supplemental Data:
Net assets, end of period (000s omitted)	$529			$499			$2			$2
Ratio of expenses to average net assets		1.15	%†		1.11	%		1.01	%		0.98	%†
Ratio of net investment income to average net assets		3.30	%†		1.90	%		0.24	%		0.02	%†
Without expense reimbursement:‡
Ratio of expenses to average net assets								1.10	%		1.31	%†
Ratio of net investment income (loss) to average net assets								0.15	%		(0.35	)%†

*   Commencement of offering of shares.

** Less than + or – $0.001.

‡ The Manager, at its discretion, reimbursed certain class-specific expenses of certain share classes to allow those classes to declare dividends equal to selected minimum annual rates. Absent such reimbursement, returns would have been lower.

† Annualized.

An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Fund.

See Notes to Financial Statements.

19

Additional Fund Information

Quarterly Schedule of Investments

A complete schedule of portfolio holdings owned by the Fund will be filed with the SEC for the first and third quarters of each fiscal year on Form N-Q, and will be available to shareholders (i) without charge, upon request, by calling toll-free (800) 221-2450 in the US or collect (212) 682-7600 outside the US or (ii) on the SEC’s website at www.sec.gov.¹ In addition, the Form N-Q may be reviewed and copied at the SEC’s Public Reference Room in Washington, D.C. Information on the operation of the Public Reference Room may be obtained by calling (800) SEC-0330. Certain of the information contained on the Fund’s Form N-Q is also made available to shareholders on Seligman’s website at www.seligman.com.¹

Proxy Voting

A description of the policies and procedures used by the Fund to determine how to vote proxies relating to portfolio securities as well as information regarding how the Fund voted proxies relating to portfolio securities during the 12-month period ended June 30 of each year will be available (i) without charge, upon request, by calling toll-free (800) 221-2450 in the US or collect (212) 682-7600 outside the US and (ii) on the SEC’s website at www.sec.gov.¹ Information for each new 12-month period ending June 30 will be available no later than August 31 of that year.

¹   These website references are inactive textual references and information contained in or otherwise accessible through these websites does not form a part of this report or the Fund’s prospectus or statement of additional information.

21

ITEM 2.	CODE OF ETHICS.
		Not applicable.

ITEM 3.	AUDIT COMMITTEE FINANCIAL EXPERT.
		Not applicable.

ITEM 4.	PRINCIPAL ACCOUNTANT FEES AND SERVICES.
		Not applicable.

ITEM 5.	AUDIT COMMITTEE OF LISTED REGISTRANTS.
		Not applicable.

ITEM 6.	SCHEDULE OF INVESTMENTS.
		Included in Item 1 above.

ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.

ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.

ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS.

Not applicable.

ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

Not applicable.

ITEM 11. CONTROLS AND PROCEDURES.

(a)       The registrant's principal executive officer and principal financial officer have concluded, based upon their evaluation of the registrant's disclosure controls and procedures as conducted within 90 days of the filing date of this report, that these disclosure controls and procedures provide reasonable assurance that material information required to be disclosed by the registrant in the report it files or submits on Form N-CSR is recorded, processed, summarized and reported, within the time periods specified in the Commission's rules and forms and that such material information is accumulated and communicated to the registrant's management, including its principal executive officer and principal financial officer, as appropriate, in order to allow timely decisions regarding required disclosure.

(b)       The registrant’s principal executive officer and principal financial officer are aware of no changes in the registrant’s internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

ITEM 12.	EXHIBITS.
	(a)(1)	Not applicable.

(a)(2)   Certifications of principal executive officer and principal financial officer as required by Rule 30a-2(a) under the
  Investment Company Act of 1940.

(a)(3)   Not applicable.

(b)   Certifications of chief executive officer and chief financial officer as required by Rule 30a-2(b) under the Investment
  Company Act of 1940.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

SELIGMAN CASH MANAGEMENT FUND, INC.

By: /S/ BRIAN T. ZINO

Brian T. Zino

President and Chief Executive Officer

Date: August 30, 2006

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By: /S/ BRIAN T. ZINO

Brian T. Zino

President and Chief Executive Officer

Date: August 30, 2006

By: /S/ LAWRENCE P. VOGEL

Lawrence P. Vogel

Vice President, Treasurer and Chief Financial Officer

Date: August 30, 2006

SELIGMAN CASH MANAGEMENT FUND, INC.

EXHIBIT INDEX

(a)(2) Certifications of principal executive officer and principal financial officer as required by Rule 30a-2(a) under the Investment Company Act of 1940.

(b) Certification of chief executive officer and chief financial officer as required by Rule 30a-2(b) of the Investment Company Act of 1940.