Exhibit 10.183

                               FOURTH AMENDMENT TO
                      REVOLVING SUBORDINATED LOAN AGREEMENT

This Fourth  Amendment to Revolving  Subordinated  Loan Agreement  ("this Fourth
Amendment")  is  made  and  entered  into  by and  between  The  Charles  Schwab
Corporation  (the "Lender") and Charles Schwab & Co., Inc. (the  "Organization")
as of this  25th day of July,  1997.  Unless  otherwise  specified  herein,  all
capitalized  terms  herein  shall  have  the  meanings  ascribed  to them in the
Revolving Subordinated Loan Agreement dated as of September 29, 1988, as amended
by a First  Amendment  thereto  dated as of April 18, 1990,  a Second  Amendment
dated as of November 1, 1991, and a Third Amendment thereto dated as of December
12,  1995,  each  between  the Lender and the  Organization  (collectively,  the
"Agreement").

WHEREAS,  the  Organization  and the  Lender  desire to amend the  Agreement  to
increase the permissible  aggregate principal amount of loans outstanding at any
one time from $250,000,000 to $300,000,000.

NOW,  THEREFORE,  the  Organization and the Lender hereby amend the Agreement as
follows:

         1. The  figure  "$300,000,000"  shall be and hereby is  substituted  in
         place of the figure "$250,000,000" in the second paragraph of paragraph
         "1." of the Agreement.

          2. Contemporaneously with the execution hereof, the Organization shall
         execute  and  deliver to the Lender a new  promissory  note in the form
         attached  hereto as  Exhibit A (the "new  Revolving  Note"),  which new
         Revolving  Note shall replace and  supersede  the Revolving  Note dated
         December 12, 1995 made and delivered by the Organization to the Lender.

         3.  Contemporaneously  with the  execution  hereof,  the Lender and the
         Organization shall execute a Roll-Over  Attachment in the form attached
         hereto as Exhibit B (the "Roll-Over Attachment"), pursuant to which the
         Lender and the Organization agree that the Commitment  Termination Date
         and the  Scheduled  Maturity Date shall in each year,  without  further
         action by  either  the  Lender  or the  Organization,  be  extended  to
         September  29 of the  following  year,  unless  on or  before  the  day
         thirteen months  preceding the Scheduled  Maturity Date then in effect,
         the Lender shall  notify the  Organization  in writing,  with a written
         copy  to the  New  York  Stock  Exchange,  Inc.,  that  the  Commitment
         Termination  Date and the Scheduled  Maturity Date then in effect shall
         not be extended.  The  Roll-Over  Attachment  shall become apart of the
         Agreement as amended by this Fourth Amendment.

         4.  Except  for the  amendment  expressly  specified  above,  all other
         provisions of the Agreement remain in full force and effect.






IN WITNESS WHEREOF, this Fourth Amendment is executed as of July 25, 1997 at San
Francisco, California.


                      THE ORGANIZATION:


                      CHARLES SCHWAB & CO., INC.

                      By: /s/Christopher V. Dodds
                         ---------------------------------------

                             Christopher V. Dodds
                      Its Senior Vice President and Treasurer
                          -----------------------------------


                      THE LENDER:

                      THE CHARLES SCHWAB CORPORATION

                      By: /s/ Steven L. Scheid
                         ---------------------------------------

                              Steven L. Scheid
                      Its Executive Vice President and Chief Financial Officer
                          ----------------------------------------------------





                                                                       Exhibit A

                                 REVOLVING NOTE

$300,000,000                                                 Date: July 25, 1997


         For  value  received,  the  undersigned  Charles  Schwab  &  Co.,  Inc.
("Organization")  hereby  promises  to pay to the  order of The  Charles  Schwab
Corporation  ("Lender") the principal  amount of each advance made by the Lender
to the Organization  under the terms of a Revolving  Subordinated Loan Agreement
between the  Organization  and the Lender  dated as of September  29,  1988,  as
amended by a First  Amendment  thereto between the  Organization  and the Lender
dated as of April 18, 1990, a Second Amendment  thereto between the Organization
and the Lender dated as of November 1, 1991, a Third  Amendment  thereto between
the  Organization  and the Lender  dated as of  December  12,  1995 and a Fourth
Amendment  thereto between the  Organization and the Lender dated as of July 25,
1997 (collectively,  the "Agreement"),  as shown in the schedule attached hereto
and any  continuation  thereof,  payable at such times as are  specified  in the
Agreement. The undersigned also promises to pay interest on the unpaid principal
amount of each  advance from the date of such  advance  until such  principal is
paid, at the rates per annum, and payable at such times, as are specified in the
Agreement.  The Note shall be subject to the  Agreement,  and all  principal and
interest payable hereunder shall be due and payable in accordance with the terms
of the  Agreement.  Terms defined in the Agreement are used herein with the same
meanings.

         The maturity date of this  Revolving  Note shall be September 29, 1998.
The  maturity  date shall in each  year,  without  further  action by either the
Lender or the  Organization,  be extended to September 29 of the following year,
unless on or before the day thirteen months  preceding the maturity date then in
effect, the Lender shall notify the Organization in writing, with a written copy
to the New York  Stock  Exchange,  Inc.,  that such  maturity  date shall not be
extended.

         This  Revolving  Note replaces and  supersedes the Revolving Note dated
December 12, 1995 in the maximum principal amount of $250,000,000,  delivered by
the Organization to the Lender.

         IN WITNESS  WHEREOF,  the undersigned has caused this Revolving Note to
be executed by its officer thereunto duly authorized and directed by appropriate
corporate authority.


                                    Charles Schwab & Co., Inc.


                                    By: /s/Christopher V. Dodds
                                       ---------------------------------

                                    Christopher V. Dodds
                                    Senior Vice President and Treasurer




                                                                       Exhibit B

                              ROLL-OVER ATTACHMENT

Additional  provision for Revolving  Subordinated  Loan  Agreement,  as amended,
between The Charles Schwab Corporation ("Lender") and Charles Schwab & Co., Inc.
("Organization").

Principal Amount:   $ 300,000,000
Date of Agreement:  September 29, 1988
Date of First Amendment to Agreement:   April 18, 1990
Date of Second Amendment to Agreement:  November 1, 1991
Date of Third Amendment to Agreement:   December 12, 1995
Date of Fourth Amendment to Agreement:  July 25, 1997

Pursuant to the roll-over provisions of the Agreement as amended, the Commitment
Termination  Date in Paragraph 1 of the Agreement is September 29, 1997, and the
Scheduled  Maturity  Date in Paragraph 1 of the Agreement is September 29, 1998.
The Commitment  Termination  Date and the Scheduled  Maturity Date shall in each
year,  without  further  action by either  the  Lender or the  Organization,  be
extended to  September  29 of the  following  year,  unless on or before the day
thirteen months preceding the Scheduled Maturity Date then in effect, the Lender
shall notify the Organization,  in writing,  with a written copy to the New York
Stock  Exchange,  Inc., that the Commitment  Termination  Date and the Scheduled
Maturity Date then in effect shall not be extended.


                      THE ORGANIZATION:

                      CHARLES SCHWAB & CO., INC.


                      By: /s/Christopher V. Dodds
                         ---------------------------------------

                               Christopher V. Dodds
                      Its Senior Vice President and Treasurer
                          -----------------------------------


                      THE LENDER:

                      THE CHARLES SCHWAB CORPORATION


                      By: /s/Steven L. Scheid
                         ---------------------------------------

                               Steven L. Scheid
                      Its Executive Vice President and Chief Financial Officer
                          ----------------------------------------------------