UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K

                CURRENT REPORT Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934


      Date of Report (Date of earliest event reported): January 20, 2005


                               CALPINE CORPORATION
                            (A Delaware Corporation)

                        Commission file number: 001-12079

                  I.R.S. Employer Identification No. 77-0212977

                           50 West San Fernando Street
                           San Jose, California 95113
                            Telephone: (408) 995-5115

     Check the  appropriate  box below if the Form 8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:

     [ ]  Written communications pursuant to Rule 425 under the Securities Act
          (17 CFR 230.425)

     [ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
          (17 CFR 240.14a-12)

     [ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
          Exchange Act (17 CFR 240.14d-2(b))

     [ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
          Exchange Act (17 CFR 240.13e-4(c))




                               TABLE OF CONTENTS
                               -----------------


            ITEM 2.02 - RESULTS OF OPERATIONS AND FINANCIAL CONDITION
            SIGNATURES
            EXHIBIT INDEX
            EXHIBIT I

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ITEM 2.02 - RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On January 20, 2005, the Registrant  issued the press release attached hereto as
Exhibit I, providing a fourth quarter 2004 update.




SIGNATURES

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

                                  CALPINE CORPORATION

                                  By:  /s/ Charles B. Clark, Jr.
                                       ------------------------------------
                                       Charles B. Clark, Jr.
                                       Senior Vice President and Controller
                                       Chief Accounting Officer

Date: January 21, 2005

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                                 EXHIBIT INDEX


                     Exhibit            Description
                     -------   -----------------------------
                     I         Press release


================================================================================

EXHIBIT I


NEWS RELEASE

                                                        CONTACTS: (408) 995-5115
                                    Media Relations:  Bill Highlander, Ext. 1244
                                    Investor Relations:  Rick Barraza, Ext. 1125

                    Calpine Provides 4th Quarter 2004 Update

     (SAN JOSE, Calif.) /PR Newswire - First Call/ Jan. 20, 2005 - In advance of
its Feb. 24, 2005 earnings  conference call, Calpine  Corporation  [NYSE:CPN] is
providing  the  following  update  on  (i)  liquidity  and   liquidity-enhancing
transactions,  (ii) an  adjustment  to its  year-end  proved gas  reserves and a
non-cash  charge on  certain  of its gas  properties,  and  (iii) a  preliminary
estimate of its GAAP  earnings  and EBITDA,  as adjusted  for non-cash and other
charges, for the period ending Dec. 31, 2004.

Liquidity
- ---------

     During  2004,  Calpine  introduced  a target of  raising  approximately  $3
billion of liquidity  with the  completion  of a number of  transactions.  These
included the sale of the  company's  Canadian  gas assets and selected  U.S. gas
assets,  issuance of additional 1st lien debt, contract  monetizations,  and the
sale of preferred interests in certain projects, along with other opportunities.
To date,  Calpine has successfully  completed  approximately $2 billion of these
liquidity-enhancing  transactions  and  continues  to move  forward  on  several
opportunities totaling approximately $1 billion.

     On Dec. 31, 2004,  the company's cash and liquidity  totaled  approximately
$1.6 billion.  This included cash and cash  equivalents on hand of approximately
$0.8 billion,  the current  portion of  restricted  cash of  approximately  $0.6
billion,  and  approximately  $0.2  billion  of  borrowing  and letter of credit
capacity   available  under  various  credit  facilities  upon  meeting  certain
conditions precedent.

Adjustment to Estimated Proved Gas Reserves
- -------------------------------------------

     Calpine and its independent, third party engineer have completed the annual
review of the  company's  proved oil and gas reserves as of Dec.  31, 2004.  The
engineer's  year-end  reserve report estimate,  based on SEC guidelines,  of 389
billion  cubic feet  equivalent  (bcfe) is  approximately  25 bcfe,  or 6% below
Calpine's  pre-reserve  report  year-end  projection.  This  reduction  will  be
reflected in Calpine's reported year-end gas reserve figures.

     In addition,  in accordance with generally accepted  accounting  principles
(GAAP), Calpine completed  field-by-field  impairment testing for all of its gas
properties   comparing  each  field's  carrying  value  to  the  sum  of  future
undiscounted  cash  flows.  During  this  testing,  it was  determined  that the
carrying value of certain fields in South Texas and Offshore  Louisiana exceeded
the sum of projected undiscounted cash flows.

     As a result, Calpine will be required to reduce the carrying value of those
fields  to  fair  market   value  by  recording  a  pre-tax,   non-cash   charge
preliminarily  estimated to be approximately  $200 million.  This charge will be
reflected  in the  company's  financial  results for the period  ending Dec. 31,
2004.

     Following  the  reduction in proved  reserves  and the non-cash  impairment
charge,  Calpine's  estimated  total  proved  reserves  of 389 bcfe will have an
estimated  value of  approximately  $912 million  (based on the present value of
estimated   future  cash  flows  discounted  at  10%,  in  accordance  with  SEC
guidelines), compared to a carrying value of approximately $607 million.

Preliminary 2004 Guidance
- -------------------------

     For the quarter ended Dec. 31, 2004, the company  currently  estimates that
GAAP  earnings  will reflect a loss of  approximately  $0.48 to $0.56 per share.
This estimate  includes the pre-tax  non-cash gas reserve  impairment  charge of
approximately  $200  million,  along with other  charges for project  repair and
maintenance expenses, and development project and equipment write-downs. EBITDA,
as adjusted for non-cash and other charges,  will be approximately  $200 to $250
million for the quarter. For the year ended Dec. 31, 2004, the company currently
estimates that GAAP earnings will reflect a loss of approximately $0.69 to $0.78
per  share.  EBITDA,  as  adjusted  for  non-cash  and  other  charges,  will be
approximately  $1.60 to $1.65 billion for the year.  These estimates are subject
to final  adjustments  and the  company  will  provide  further  detail on these
results on its earnings conference call.

     Calpine plans to announce its fourth  quarter and year-end  2004  financial
results on Thursday,  Feb. 24, 2005,  before the market  opens.  The company has
scheduled a conference call to discuss the results at 8:30 a.m.  Pacific Time on
that day.  Interested  parties may access the  teleconference  via a web cast on
Calpine's Investor Relations page, www.calpine.com, or by dialing 1-888-603-6685
(1-706-634-1265  for  international  callers) at least five  minutes  before the
start  of the  call.  The  call  will be  open  to the  public  and  media  in a
listen-only mode by telephone and web broadcast.  A replay and transcript of the
conference  call will be available for 30 days on Calpine's  Investor  Relations
page at www.calpine.com.

     Calpine  Corporation  is a power  company  dedicated to providing  electric
power to customers from clean, efficient, natural gas-fired and geothermal power
plants.  The company generates power at plants it owns or leases in 21 states in
the United States, three provinces in Canada and in the United Kingdom.

     For the company, EBITDA is not a measure of operating results, but rather a
measure of its ability to service debt and to raise additional  funds. It should
not be construed as an alternative to either (i) income from  operations or (ii)
cash flows from  operating  activities.  It is defined as net income less income
from  unconsolidated   investments,   plus  cash  received  from  unconsolidated
investments;   plus  provision  for  tax,  plus  interest   expense   (including
distributions  on trust  preferred  securities and one-third of operating  lease
expense,  which is  management's  estimate of the  component of operating  lease
expense that constitutes  interest expense);  plus  depreciation,  depletion and
amortization. The interest, tax, and depreciation and amortization components of
discontinued  operations are added back in calculating EBITDA, as adjusted.  The
non-GAAP  measure,  EBITDA,  as adjusted  for  non-cash  and other  charges,  is
presented  as a further  refinement  of EBITDA,  as  adjusted,  to  reflect  the
company's ability to service debt with cash.

     This  news  release  discusses  certain  matters  that  may  be  considered
"forward-looking" statements within the meaning of Section 27A of the Securities
Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934,
as  amended,  including  statements  regarding  the  intent,  belief or  current
expectations  of  Calpine   Corporation  ("the  Company")  and  its  management.
Prospective investors are cautioned that any such forward-looking statements are
not  guarantees  of  future  performance  and  involve  a number  of  risks  and
uncertainties  that could  materially  affect  actual  results  such as, but not
limited to, (i) the timing and extent of  deregulation of energy markets and the
rules and regulations adopted on a transitional basis with respect thereto; (ii)
the timing and extent of changes in  commodity  prices for energy,  particularly
natural gas and electricity; (iii) unscheduled outages of operating plants; (iv)
a competitor's  development of lower cost generating gas-fired power plants; (v)
risks  associated  with  marketing  and selling  power from power  plants in the
newly-competitive  energy market;  (vi) other risks identified from time-to-time
in the  Company's  reports  and  registration  statements  filed  with  the SEC,
including  the risk  factors  identified  in its  Annual  Report  on Form  10-K,
amendment 2, for the year ended December 31, 2003 and in its Quarterly Report on
Form 10-Q for the quarter ended  September 30, 2004,  which can also be found on
the Company's website at www.calpine.com. All information set forth in this news
release is as of today's date, and the Company undertakes no duty to update this
information.