As filed with the Securities and Exchange Commission on January 20, 2000
                                                     Registration No. 333-______
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   ----------

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                                   ----------

                        PINNACLE WEST CAPITAL CORPORATION
             (Exact name of Registrant as specified in its charter)

           ARIZONA                                               86-0512431
(State or other jurisdiction                                  (I.R.S. EMPLOYER)
incorporation or organization)                               Identification No.)

                            400 EAST VAN BUREN STREET
                                 P.O. BOX 52132,
                           PHOENIX, ARIZONA 85072-2132
               (Address of Principal Executive Offices) (Zip Code)

               THE PINNACLE WEST CAPITAL CORPORATION SAVINGS PLAN
                            (Full title of the Plan)

                                Matthew P. Feeney
                              SNELL & WILMER L.L.P.
                               One Arizona Center
                             Phoenix, AZ 85004-0001
                     (Name and Address of Agent for Service)
                                 (602) 382-6239
          (Telephone number, including area code, of agent for service)



                                     CALCULATION OF REGISTRATION FEE
======================================================================================================
                                             PROPOSED MAXIMUM      PROPOSED MAXIMUM
 TITLE OF SECURITIES TO    AMOUNT TO BE          OFFERING        AGGREGATE OFFERING      AMOUNT OF
    BE REGISTERED (1)       REGISTERED      PRICE PER SHARE(2)         PRICE(2)       REGISTRATION FEE
- ------------------------------------------------------------------------------------------------------
                                                                             
Common Stock,
No Par Value             2,000,000 shares       $30.8125             $61,625,000         $16,269.00
======================================================================================================


(1)  In addition, pursuant to Rule 416(c) under the Securities Act of 1933, this
     registration  statement also covers an undetermined  amount of interests in
     the plan.

(2)  Estimated  solely  for  the  purpose  of  calculating  the  amount  of  the
     registration fee, pursuant to Rules 457(c) and 457(h) of the Securities Act
     of 1933,  on the basis of the average of the high and low prices for shares
     of common stock on the New York Stock Exchange on January 14, 2000.

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                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3. INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE.

     The  following  documents  have  been  filed  by  Pinnacle  West  with  the
Securities and Exchange  Commission  pursuant to the Securities  Exchange Act of
1934 and are incorporated by reference into this Registration Statement:

     1.   Annual  Report on Form 10-K for the  fiscal  year ended  December  31,
          1998;

     2.   Annual Report on Form 11-K for the fiscal year ended December 31, 1998
          for the Savings Plan for Employees of Arizona Public Service  Company,
          the  Savings  Plan for  Union  Employees  of  Arizona  Public  Service
          Company,  and the Savings Plan for  Employees of Pinnacle West Capital
          Corporation;

     3.   Quarterly  Reports on Form 10-Q for the quarters ended March 31, 1999,
          June 30, 1999, and September 30, 1999;

     4.   Current  Reports on Form 8-K dated  January 11, 1999,  March 22, 1999,
          May 14, 1999,  August 26, 1999,  September 21, 1999, and September 29,
          1999;

     5.   The description  of  Pinnacle West's  common  stock  contained  in its
          registration  statement on Form 8-B, File No. 1-8962, as filed on July
          25, 1985,  except for the reference to transfer  agents and registrars
          for  the  common  stock  contained  therein  and  of  Pinnacle  West's
          Preferred Share Purchase Rights included in its registration statement
          on Form 8-A,  File No.  1-8962,  as filed on March 31,  1989, a Form 8
          Amendment thereto as filed on August 29, 1991, and a Form 8A/A thereto
          as filed on April 19, 1999.

     All  documents  subsequently  filed by Pinnacle  West  pursuant to Sections
13(a),  13(c), 14 and 15(d) of the Securities Exchange Act of 1934, prior to the
filing  of a  post-effective  amendment  to this  registration  statement  which
indicates that all securities  offered have been sold or which  deregisters  all
securities  then  remaining  unsold,  shall  be  deemed  to be  incorporated  by
reference in this  registration  statement and to be a part hereof from the date
of filing such documents.  Any statement contained in a document incorporated or
deemed to be incorporated by reference  herein shall be deemed to be modified or
superseded  for  purposes of this  registration  statement  to the extent that a
statement  contained herein or in any subsequently  filed document which also is
or is deemed to be incorporated by reference  herein modifies or supersedes such
statement.  Any statement so modified or superseded shall not be deemed,  except
as so  modified  or  superseded,  to  constitute  a part  of  this  registration
statement.

Item 4. DESCRIPTION OF SECURITIES. Not applicable.

Item 5. INTERESTS OF NAMED EXPERTS AND COUNSEL. Not applicable.

Item 6. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     The  Arizona  Business  Corporation  Act  (the  "ABCA")  permits  extensive
indemnification of present and former directors,  officers,  employees or agents
of an Arizona corporation,  whether or not authority for such indemnification is
contained in the indemnifying corporation's articles of incorporation or bylaws.
Specific  authority  for  indemnification  of present and former  directors  and
officers,  under certain circumstances,  is contained in Article VII of Pinnacle
West's bylaws.

     Under the ABCA,  in order for a  corporation  to  indemnify  a director  or
officer, a majority of the corporation's  disinterested  directors,  independent
legal counsel,  or the shareholders must find that the conduct of the individual
to be indemnified was in good faith and that the individual  reasonably believed
that the conduct was in the corporation's best interests (in the case of conduct
in an "official capacity" with the corporation) or that the conduct was at least
not opposed to the  corporation's  best  interests (in all other cases).  In the
case of any  criminal  proceeding,  the  finding  must be to the effect that the
individual  had no  reasonable  cause  to  believe  the  conduct  was  unlawful.
Indemnification  is permitted with respect to expenses,  judgments,  fines,  and
amounts paid in settlement by such individuals.

     Indemnification  under  the ABCA is  permissive,  except  in the event of a
successful  defense,  in which case a director  or officer  must be  indemnified
against reasonable  expenses,  including attorneys' fees, incurred in connection
with the  proceeding.  In addition,  the ABCA requires  Arizona  corporations to
indemnify any "outside director" (a director who is not an officer, employee, or
holder of five percent or more of any class of the corporation's  stock) against
liability  unless (i) the  corporation's  articles of  incorporation  limit such
indemnification, (ii) the outside director is adjudged liable in a proceeding by
or in the right of the corporation or in any other proceeding  charging improper
personal benefit to the director, or (iii) a court determines, before payment to
the outside director,  that the director failed to meet the standards of conduct
described in the preceding paragraph.  A court may also order that an individual
be  indemnified  if the court finds that the individual is fairly and reasonably
entitled  to  indemnification  in  light of all of the  relevant  circumstances,
whether or not the  individual  has met the standards of conduct in this and the
preceding paragraph.

     Insurance  is  maintained  on a  regular  basis  (and not  specifically  in
connection  with  this  offering)  against  liabilities  arising  on the part of
directors and officers out of their performance in such capacities or arising on
the part of  Pinnacle  West  out of its  foregoing  indemnification  provisions,
subject to certain exclusions and to the policy limits.

Item 7. EXEMPTION FROM REGISTRATION CLAIMED. Not applicable.

Item 8. EXHIBITS.

     Exhibit Index located at Page 6.

     The  registrant  will submit or has  submitted  the plan and any  amendment
thereto to the Internal  Revenue Service ("IRS") in a timely manner and has made
or will make all changes required by the IRS in order to qualify the plan.

Item 9. UNDERTAKINGS.

          (a) The undersigned Registrant hereby undertakes:

     (1) To file,  during any period in which  offers or sales are being made, a
post-effective amendment to this registration statement:

               (i) To include any prospectus required by Section 10(a)(3) of the
          Securities Act of 1933;

                                       2

               (ii) To reflect  in the  prospectus  any facts or events  arising
          after the effective  date of the  registration  statement (or the most
          recent post-effective amendment thereof) which, individually or in the
          aggregate, represent a fundamental change in the information set forth
          in the  registration  statement.  Notwithstanding  the foregoing,  any
          increase  or decrease  in volume of  securities  offered (if the total
          dollar  value of  securities  offered  would not exceed that which was
          registered)  and  any  deviation  from  the  low  or  high  end of the
          estimated  maximum  offering  range  may be  reflected  in the form of
          prospectus  filed with the  Commission  pursuant to Rule 424(b) if, in
          the aggregate,  the changes in volume and price represent no more than
          a 20 percent change in the maximum aggregate  offering price set forth
          in the  "Calculation  of  Registration  Fee"  table  in the  effective
          registration statement;

               (iii) To include any  material  information  with  respect to the
          plan of  distribution  not  previously  disclosed in the  registration
          statement  or  any  material   change  to  such   information  in  the
          registration statement;

PROVIDED, HOWEVER, that paragraphs (i) and (ii) do not apply if the registration
statement is on Form S-3, Form S-8 or Form F-3 and the  information  required to
be included in a  post-effective  amendment by those  paragraphs is contained in
periodic  reports filed with or furnished to the  Commission  by the  registrant
pursuant to Section 13 or Section 15(d) of the  Securities  Exchange Act of 1934
that are incorporated by reference in the registration statement.

     (2) That, for the purpose of determining any liability under the Securities
Act of 1933,  each  such  post-effective  amendment  shall be deemed to be a new
registration  statement  relating to the  securities  offered  therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

     (3) To remove from registration by means of a post-effective  amendment any
of the securities being registered which remain unsold at the termination of the
offering.

          (b) The undersigned registrant hereby undertakes that, for purposes of
determining  any liability  under the Securities Act of 1933, each filing of the
registrant's  annual  report  pursuant to Section  13(a) or Section 15(d) of the
Securities  Exchange  Act of 1934  (and,  where  applicable,  each  filing of an
employee  benefit  plan's  annual  report  pursuant  to  Section  15(d)  of  the
Securities  Exchange  Act of 1934)  that is  incorporated  by  reference  in the
registration  statement  shall  be  deemed  to be a new  registration  statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

          (c)  Insofar as  indemnification  for  liabilities  arising  under the
Securities Act of 1933 may be permitted to directors,  officers and  controlling
persons of the registrant  pursuant to the foregoing  provisions,  or otherwise,
the  registrant  has been  advised  that in the  opinion of the  Securities  and
Exchange  Commission such  indemnification is against public policy as expressed
in the Act and is,  therefore,  unenforceable.  In the  event  that a claim  for
indemnification  against  such  liabilities  (other  than  the  payment  by  the
registrant of expenses  incurred or paid by a director,  officer or  controlling
person of the  registrant  in the  successful  defense  of any  action,  suit or
proceeding)  is  asserted by such  director,  officer or  controlling  person in
connection with the securities being registered,  the registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of  appropriate  jurisdiction  the  question  of whether  such
indemnification  by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.

                                       3

                                   SIGNATURES

     THE REGISTRANT. Pursuant to the requirements of the Securities Act of 1933,
the registrant certifies that it has reasonable grounds to believe that it meets
all of the  requirements  for  filing  on  Form  S-8 and has  duly  caused  this
registration statement to be signed on its behalf by the undersigned,  thereunto
duly authorized, in the City of Phoenix, State of Arizona, on January 19, 2000.


                                  PINNACLE WEST CAPITAL CORPORATION


                                  By: William J. Post
                                      ------------------------------------------
                                      William J. Post, President
                                      and Chief Executive Officer


     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
registration  statement  has  been  signed  by  the  following  persons  in  the
capacities and on the date indicated.  Each person whose signature appears below
hereby  authorizes  Chris N. Froggatt,  Barbara M. Gomez and Michael V. Palmeri,
and each of them , as attorneys-in-fact, to sign in his or her name and behalf ,
individually and in each capacity  designated below, and to file any amendments,
including post-effective amendments, to this registration statement.

Signature                            Title                          Date
- ---------                            -----                          ----

William J. Post              President, Chief Executive        January 19, 2000
- --------------------------   Officer and Director (Principal
William J. Post              Executive Officer)

Michael V. Palmeri           Vice President, Finance           January 19, 2000
- --------------------------   (Principal Financial Officer)
Michael V. Palmeri

Chris N. Froggatt            Vice President and Controller     January 19, 2000
- --------------------------   (Principal Accounting Officer)
Chris N. Froggatt

Edward N. Basha, Jr.         Director                          January 19, 2000
- --------------------------
Edward N. Basha, Jr.

Michael L. Gallagher         Director                          January 19, 2000
- --------------------------
Michael L. Gallagher

Pamela Grant                 Director                          January 19, 2000
- --------------------------
Pamela Grant

Roy A. Herberger, Jr.        Director                          January 19, 2000
- --------------------------
Roy A. Herberger, Jr.

Martha O. Hesse              Director                          January 19, 2000
- --------------------------
Martha O. Hesse

                                       4


William S. Jamieson, Jr.     Director                          January 19, 2000
- --------------------------
William S. Jamieson, Jr.

Humberto S. Lopez            Director                          January 19, 2000
- --------------------------
Humberto S. Lopez

Richard Snell                Chairman of the Board of          January 19, 2000
- --------------------------   Directors
Richard Snell


     THE PLAN.  Pursuant to the  requirements of the Securities Act of 1933, the
Pinnacle West Capital Corporation Savings Plan has duly caused this registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of Phoenix, State of Arizona, on January 19, 2000.


                              The Pinnacle West Capital Corporation Savings Plan

                              By: Administrative Committtee


                              By: Armando Flores
                                  ----------------------------------------------
                                  Armando Flores, Chairman

                                       5

                                  EXHIBIT INDEX

Exhibit No.    Description
- -----------    -----------
4.1            Bylaws

23.1           Consent of Deloitte & Touche LLP

In addition to those Exhibits shown above,  the registrant  hereby  incorporates
the following  Exhibits  pursuant to Rule 411 of Regulation C promulgated  under
the Securities Act of 1933 by reference to the filings set forth below:

                                       Previously Filed                  Date
Exhibit No.    Description                as Exhibit        File No.   Effective
- -----------    -----------             ----------------     --------   ---------
4.2            Amended and Restated    19.1 to September    1-8962      11/14/88
               Certificate of          1988 Form 10-Q
               Incorporation           Report

4.3            Rights Agreement        4.1 to Form 8-K      1-8962      4/19/99
                                       Report dated
                                       March 22, 1999

                                       6