<PAGE>   1
     As filed with the Securities and Exchange Commission on July 13, 2001
                    Registration Statement No. ____________

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                ----------------

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

                     THE PNC FINANCIAL SERVICES GROUP, INC.
             (Exact name of registrant as specified in its charter)

                                ----------------

         Pennsylvania                                     25-1435979
(State or other jurisdiction of               (IRS Employer Identification No.)
incorporation or organization)

                                  One PNC Plaza
                                249 Fifth Avenue
                       Pittsburgh, Pennsylvania 15222-2707
                                 (412) 762-1553
       (Address, including zip code, and telephone number, including area
               code, of registrant's principal executive offices)

                                ----------------

                     THE PNC FINANCIAL SERVICES GROUP, INC.
                       SUPPLEMENTAL INCENTIVE SAVINGS PLAN
                     THE PNC FINANCIAL SERVICES GROUP, INC.
                    AND AFFILIATES DEFERRED COMPENSATION PLAN
                            (Full title of the plans)

                                ----------------

                              Walter E. Gregg, Jr.
                                  Vice Chairman
                     The PNC Financial Services Group, Inc.
                                  One PNC Plaza
                                249 Fifth Avenue
                       Pittsburgh, Pennsylvania 15222-2707
                                 (412) 762-2281
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                                    Copy to:
                               Steven Kaplan, Esq.
                                 Arnold & Porter
                            555 Twelfth Street, N.W.
                             Washington, D.C. 20004
                                 (202) 942-5000

                              ---------------------

                         Calculation of Registration Fee

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------------------------
 Title of securities to be       Amount to be      Proposed maximum     Proposed maximum        Amount of
         registered           registered (1)(2)     offering price     aggregate offering     registration
                                                      per share             price (1)              fee
-------------------------------------------------------------------------------------------------------------
<S>                           <C>                 <C>                 <C>                    <C>
   Deferred Compensation
      Obligations (3)            $50,000,000             N/A               $50,000,000           $12,500
-------------------------------------------------------------------------------------------------------------
   Deferred Compensation
      Obligations (4)            $67,000,000             N/A               $67,000,000           $16,750
-------------------------------------------------------------------------------------------------------------
   Total Registration Fee                                                                        $29,250
-------------------------------------------------------------------------------------------------------------
</TABLE>

(1)  Estimated solely for the purpose of calculating the registration fee
     pursuant to Securities Act of 1933, as amended (the "Securities Act"), Rule
     457(h).

(2)  In addition, pursuant to Rule 416(c) under the Securities Act, this
     Registration Statement also covers an indeterminate amount of interests to
     be offered or sold pursuant to the employee benefit plan(s) described
     herein.

(3)  The Deferred Compensation Obligations are unsecured obligations of The PNC
     Financial Services Group, Inc. to pay deferred compensation in the future
     in accordance with the terms of The PNC Financial Services Group, Inc.
     Supplemental Incentive Savings Plan.

(4)  The Deferred Compensation Obligations are unsecured obligations of The PNC
     Financial Services Group, Inc. to pay deferred compensation in the future
     in accordance with the terms of The PNC Financial Services Group, Inc. and
     Affiliates Deferred Compensation Plan.


<PAGE>   2



                                  INTRODUCTION

         The PNC Financial Services Group, Inc. (the "Registrant") is filing
this Registration Statement because of the uncertainty as to whether the
Deferred Compensation Obligations would or should be considered "securities" or
be subject to registration under the Securities Act. The filing of this
Registration Statement is not an admission by the Registrant that the Deferred
Compensation Obligations are securities or are subject to the registration
requirements of the Securities Act.


                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT


         The purpose of this Registration Statement is to register an additional
$50,000,000 of Deferred Compensation Obligations in The PNC Financial Services
Group, Inc. Supplemental Incentive Savings Plan, an additional $67,000,000 of
Deferred Compensation Obligations in The PNC Financial Services Group, Inc. and
Affiliates Deferred Compensation Plan, and an indeterminate amount of interests
to be offered or sold pursuant to the employee benefit plan(s) described herein.
Pursuant to General Instruction E to Form S-8, except as set forth below, the
contents of Registration Statement No. 333-18069 are incorporated herein by
reference.


ITEM 8. EXHIBITS


Exhibit 4.1       The PNC Financial Services Group, Inc. Supplemental Incentive
                  Savings Plan, incorporated by reference from Exhibit 10.4 to
                  the Corporation's Annual Report on Form 10-K for the year
                  ended December 31, 1999. (File No. 1-9718).

Exhibit 4.2       The PNC Financial Services Group, Inc. and Affiliates Deferred
                  Compensation Plan, incorporated by reference from Exhibit
                  10.11 to the Corporation's Annual Report on Form 10-K for the
                  year ended December 31, 1999.

Exhibit 5         Opinion of Henry Howarth III, Senior Counsel, The PNC
                  Financial Services Group, Inc., filed herewith.

Exhibit 23.1      Consent of Henry Howarth III, Senior Counsel, The PNC
                  Financial Services Group, Inc., included in the opinion filed
                  as Exhibit 5 hereto.

Exhibit 23.2      Consent of Ernst & Young, LLP, filed herewith.

Exhibit 24        Powers of Attorney, filed herewith.




                                       -2-
<PAGE>   3



                                   SIGNATURES

         The Registrant. Pursuant to the requirements of the Securities Act, 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 Pittsburgh, Commonwealth of Pennsylvania, on July
13th, 2001.



                                     THE PNC FINANCIAL SERVICES GROUP, INC.
                                     (Registrant)

                                     By: /s/ Robert L. Haunschild
                                        ----------------------------------------
                                        (Signature and Title)
                                        Robert L. Haunschild,
                                        Senior Vice President and
                                        Chief Financial Officer


         Pursuant to the requirements of the Securities Act, this Registration
Statement has been signed by the following persons in the capacities and on the
date(s) indicated:


<TABLE>
<CAPTION>
       SIGNATURE                                       TITLE                                DATE

<S>                                  <C>                                               <C>
*                                     Chairman, President, Chief Executive              July 5, 2001
-------------------------------       Officer and Director
James E. Rohr                         (Principal Executive Officer)



/s/ Robert L. Haunschild              Senior Vice President and Chief                   July 13, 2001
-------------------------------       Financial Officer (Principal
Robert L. Haunschild                  Financial Officer)



*                                     Controller                                        July 5, 2001
-------------------------------       (Principal Accounting Officer)
Samuel R. Patterson
</TABLE>






                                      -3-
<PAGE>   4


<TABLE>
<CAPTION>
       SIGNATURE                                       TITLE                                DATE

<S>                                  <C>                                               <C>
*                                     Vice Chairman and Director                        July 5, 2001
-------------------------------
Walter E. Gregg, Jr.



*                                     Director                                          July 5, 2001
-------------------------------
Paul W. Chellgren



*                                     Director                                          July 5, 2001
-------------------------------
Robert N. Clay



*                                     Director                                          July 5, 2001
-------------------------------
George A. Davidson, Jr.



*                                     Director                                          July 5, 2001
-------------------------------
David F. Girard-diCarlo



*                                     Director                                          July 5, 2001
-------------------------------
William R. Johnson



*                                     Director                                          July 5, 2001
-------------------------------
Bruce C. Lindsay



*                                     Director                                          July 5, 2001
-------------------------------
W. Craig McClelland



*                                     Director                                          July 5, 2001
-------------------------------
Thomas H. O'Brien
</TABLE>




                                      -4-
<PAGE>   5


<TABLE>
<CAPTION>
       SIGNATURE                                       TITLE                                DATE

<S>                                  <C>                                               <C>
*                                     Director                                          July 5, 2001
-------------------------------
Jane G. Pepper



*                                     Director                                          July 5, 2001
-------------------------------
Lorene K. Steffes



*                                     Director                                          July 5, 2001
-------------------------------
Thomas J. Usher



*                                     Director                                          July 5, 2001
-------------------------------
Milton A. Washington



*                                     Director                                          July 5, 2001
-------------------------------
Helge H. Wehmeier


*By: /s/  Thomas R. Moore
     -------------------------------------
     Thomas R. Moore, Attorney-in-Fact,
     pursuant to Powers of Attorney filed
     herewith
</TABLE>







                                      -5-
<PAGE>   6




         The Plan. Pursuant to the requirements of the Securities Act, the
trustees (or other persons who administer the employee benefits plan) have duly
caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Pittsburgh, Commonwealth
of Pennsylvania, on this July 13th, 2001.


                                        THE PNC FINANCIAL SERVICES
                                        GROUP, INC. SUPPLEMENTAL
                                        INCENTIVE SAVINGS PLAN
                                        (Plan)

                                        By: /s/ James S. Gehlke
                                           ------------------------------
                                           (Signature and Title)
                                           James S. Gehlke,
                                           Plan Manager/Administrator












                                      -6-
<PAGE>   7



         The Plan. Pursuant to the requirements of the Securities Act, the
trustees (or other persons who administer the employee benefits plan) have duly
caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Pittsburgh, Commonwealth
of Pennsylvania, on this July 13th, 2001.


                                           THE PNC FINANCIAL SERVICES
                                           GROUP, INC. AND AFFILIATES
                                           DEFERRED COMPENSATION PLAN
                                           (Plan)

                                           By: /s/ James S. Gehlke
                                              ---------------------------------
                                              (Signature and Title)
                                              James S. Gehlke,
                                              Plan Manager/Administrator
















                                      -7-
<PAGE>   8


INDEX TO EXHIBITS

Exhibit 4.1       The PNC Financial Services Group, Inc. Supplemental Incentive
                  Savings Plan, incorporated by reference from Exhibit 10.4 to
                  the Corporation's Annual Report on Form 10-K for the year
                  ended December 31, 1999. (File No. 1-9718).

Exhibit 4.2       The PNC Financial Services Group, Inc. and Affiliates Deferred
                  Compensation Plan, incorporated by reference from Exhibit
                  10.11 to the Corporation's Annual Report on Form 10-K for the
                  year ended December 31, 1999.

Exhibit 5         Opinion of Henry Howarth III, Senior Counsel, The PNC
                  Financial Services Group, Inc., filed herewith.

Exhibit 23.1      Consent of Henry Howarth III, Senior Counsel, The PNC
                  Financial Services Group, Inc., included in the opinion filed
                  as Exhibit 5 hereto.

Exhibit 23.2      Consent of Ernst & Young, LLP, filed herewith.

Exhibit 24        Powers of Attorney, filed herewith.
[{"type": "S-8", "sequence": "1", "filename": "j8936101s-8.txt", "description": "THE PNC FINANCIAL SERVICES GROUP, INC.   FORM S-8", "secsgml_size_bytes": 15242}]
{"company-data": {"conformed-name": "PNC FINANCIAL SERVICES GROUP INC", "cik": "0000713676", "assigned-sic": "6021", "irs-number": "251435979", "state-of-incorporation": "PA", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-65040", "film-number": "1680565"}, "business-address": {"street1": "ONE PNC PLAZA", "street2": "249 FIFTH AVE", "city": "PITTSBURGH", "state": "PA", "zip": "15265", "phone": "4127621553"}, "mail-address": {"street1": "ONE PNC PLAZA", "street2": "FIFTH AVENUE & WOOD STREET", "city": "PITTSBURGH", "state": "PA", "zip": "15265"}, "former-company": [{"former-conformed-name": "PNC BANK CORP", "date-changed": "19930505"}, {"former-conformed-name": "PNC BANK CORP /PA/", "date-changed": "19930428"}, {"former-conformed-name": "PNC FINANCIAL CORP", "date-changed": "19920703"}]}
1
     As filed with the Securities and Exchange Commission on July 13, 2001
                    Registration Statement No. ____________

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                ----------------

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

                     THE PNC FINANCIAL SERVICES GROUP, INC.
             (Exact name of registrant as specified in its charter)

                                ----------------

         Pennsylvania                                     25-1435979
(State or other jurisdiction of               (IRS Employer Identification No.)
incorporation or organization)

                                  One PNC Plaza
                                249 Fifth Avenue
                       Pittsburgh, Pennsylvania 15222-2707
                                 (412) 762-1553
       (Address, including zip code, and telephone number, including area
               code, of registrant's principal executive offices)

                                ----------------

                     THE PNC FINANCIAL SERVICES GROUP, INC.
                       SUPPLEMENTAL INCENTIVE SAVINGS PLAN
                     THE PNC FINANCIAL SERVICES GROUP, INC.
                    AND AFFILIATES DEFERRED COMPENSATION PLAN
                            (Full title of the plans)

                                ----------------

                              Walter E. Gregg, Jr.
                                  Vice Chairman
                     The PNC Financial Services Group, Inc.
                                  One PNC Plaza
                                249 Fifth Avenue
                       Pittsburgh, Pennsylvania 15222-2707
                                 (412) 762-2281
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                                    Copy to:
                               Steven Kaplan, Esq.
                                 Arnold & Porter
                            555 Twelfth Street, N.W.
                             Washington, D.C. 20004
                                 (202) 942-5000

                              ---------------------

                         Calculation of Registration Fee
-------------------------------------------------------------------------------------------------------------
 Title of securities to be       Amount to be      Proposed maximum     Proposed maximum        Amount of
         registered           registered (1)(2)     offering price     aggregate offering     registration
                                                      per share             price (1)              fee
-------------------------------------------------------------------------------------------------------------
Deferred Compensation
      Obligations (3)            $50,000,000             N/A               $50,000,000           $12,500
-------------------------------------------------------------------------------------------------------------
   Deferred Compensation
      Obligations (4)            $67,000,000             N/A               $67,000,000           $16,750
-------------------------------------------------------------------------------------------------------------
   Total Registration Fee                                                                        $29,250
-------------------------------------------------------------------------------------------------------------
(1)  Estimated solely for the purpose of calculating the registration fee
     pursuant to Securities Act of 1933, as amended (the "Securities Act"), Rule
     457(h).

(2)  In addition, pursuant to Rule 416(c) under the Securities Act, this
     Registration Statement also covers an indeterminate amount of interests to
     be offered or sold pursuant to the employee benefit plan(s) described
     herein.

(3)  The Deferred Compensation Obligations are unsecured obligations of The PNC
     Financial Services Group, Inc. to pay deferred compensation in the future
     in accordance with the terms of The PNC Financial Services Group, Inc.
     Supplemental Incentive Savings Plan.

(4)  The Deferred Compensation Obligations are unsecured obligations of The PNC
     Financial Services Group, Inc. to pay deferred compensation in the future
     in accordance with the terms of The PNC Financial Services Group, Inc. and
     Affiliates Deferred Compensation Plan.
2

                                  INTRODUCTION

         The PNC Financial Services Group, Inc. (the "Registrant") is filing
this Registration Statement because of the uncertainty as to whether the
Deferred Compensation Obligations would or should be considered "securities" or
be subject to registration under the Securities Act. The filing of this
Registration Statement is not an admission by the Registrant that the Deferred
Compensation Obligations are securities or are subject to the registration
requirements of the Securities Act.

                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

         The purpose of this Registration Statement is to register an additional
$50,000,000 of Deferred Compensation Obligations in The PNC Financial Services
Group, Inc. Supplemental Incentive Savings Plan, an additional $67,000,000 of
Deferred Compensation Obligations in The PNC Financial Services Group, Inc. and
Affiliates Deferred Compensation Plan, and an indeterminate amount of interests
to be offered or sold pursuant to the employee benefit plan(s) described herein.
Pursuant to General Instruction E to Form S-8, except as set forth below, the
contents of Registration Statement No. 333-18069 are incorporated herein by
reference.

ITEM 8. EXHIBITS

Exhibit 4.1       The PNC Financial Services Group, Inc. Supplemental Incentive
                  Savings Plan, incorporated by reference from Exhibit 10.4 to
                  the Corporation's Annual Report on Form 10-K for the year
                  ended December 31, 1999. (File No. 1-9718).

Exhibit 4.2       The PNC Financial Services Group, Inc. and Affiliates Deferred
                  Compensation Plan, incorporated by reference from Exhibit
                  10.11 to the Corporation's Annual Report on Form 10-K for the
                  year ended December 31, 1999.

Exhibit 5         Opinion of Henry Howarth III, Senior Counsel, The PNC
                  Financial Services Group, Inc., filed herewith.

Exhibit 23.1      Consent of Henry Howarth III, Senior Counsel, The PNC
                  Financial Services Group, Inc., included in the opinion filed
                  as Exhibit 5 hereto.

Exhibit 23.2      Consent of Ernst & Young, LLP, filed herewith.

Exhibit 24        Powers of Attorney, filed herewith.

                                       -2-
3

                                   SIGNATURES

         The Registrant. Pursuant to the requirements of the Securities Act, 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 Pittsburgh, Commonwealth of Pennsylvania, on July
13th, 2001.

                                     THE PNC FINANCIAL SERVICES GROUP, INC.
                                     (Registrant)

                                     By: /s/ Robert L. Haunschild
                                        ----------------------------------------
                                        (Signature and Title)
                                        Robert L. Haunschild,
                                        Senior Vice President and
                                        Chief Financial Officer

         Pursuant to the requirements of the Securities Act, this Registration
Statement has been signed by the following persons in the capacities and on the
date(s) indicated:
SIGNATURE                                       TITLE                                DATE
*                                     Chairman, President, Chief Executive              July 5, 2001
-------------------------------       Officer and Director
James E. Rohr                         (Principal Executive Officer)

/s/ Robert L. Haunschild              Senior Vice President and Chief                   July 13, 2001
-------------------------------       Financial Officer (Principal
Robert L. Haunschild                  Financial Officer)

*                                     Controller                                        July 5, 2001
-------------------------------       (Principal Accounting Officer)
Samuel R. Patterson
-3-
4
SIGNATURE                                       TITLE                                DATE
*                                     Vice Chairman and Director                        July 5, 2001
-------------------------------
Walter E. Gregg, Jr.

*                                     Director                                          July 5, 2001
-------------------------------
Paul W. Chellgren

*                                     Director                                          July 5, 2001
-------------------------------
Robert N. Clay

*                                     Director                                          July 5, 2001
-------------------------------
George A. Davidson, Jr.

*                                     Director                                          July 5, 2001
-------------------------------
David F. Girard-diCarlo

*                                     Director                                          July 5, 2001
-------------------------------
William R. Johnson

*                                     Director                                          July 5, 2001
-------------------------------
Bruce C. Lindsay

*                                     Director                                          July 5, 2001
-------------------------------
W. Craig McClelland

*                                     Director                                          July 5, 2001
-------------------------------
Thomas H. O'Brien
-4-
5
SIGNATURE                                       TITLE                                DATE
*                                     Director                                          July 5, 2001
-------------------------------
Jane G. Pepper

*                                     Director                                          July 5, 2001
-------------------------------
Lorene K. Steffes

*                                     Director                                          July 5, 2001
-------------------------------
Thomas J. Usher

*                                     Director                                          July 5, 2001
-------------------------------
Milton A. Washington

*                                     Director                                          July 5, 2001
-------------------------------
Helge H. Wehmeier

*By: /s/  Thomas R. Moore
     -------------------------------------
     Thomas R. Moore, Attorney-in-Fact,
     pursuant to Powers of Attorney filed
     herewith
-5-
6

         The Plan. Pursuant to the requirements of the Securities Act, the
trustees (or other persons who administer the employee benefits plan) have duly
caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Pittsburgh, Commonwealth
of Pennsylvania, on this July 13th, 2001.

                                        THE PNC FINANCIAL SERVICES
                                        GROUP, INC. SUPPLEMENTAL
                                        INCENTIVE SAVINGS PLAN
                                        (Plan)

                                        By: /s/ James S. Gehlke
                                           ------------------------------
                                           (Signature and Title)
                                           James S. Gehlke,
                                           Plan Manager/Administrator

                                      -6-
7

         The Plan. Pursuant to the requirements of the Securities Act, the
trustees (or other persons who administer the employee benefits plan) have duly
caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Pittsburgh, Commonwealth
of Pennsylvania, on this July 13th, 2001.

                                           THE PNC FINANCIAL SERVICES
                                           GROUP, INC. AND AFFILIATES
                                           DEFERRED COMPENSATION PLAN
                                           (Plan)

                                           By: /s/ James S. Gehlke
                                              ---------------------------------
                                              (Signature and Title)
                                              James S. Gehlke,
                                              Plan Manager/Administrator

                                      -7-
8

INDEX TO EXHIBITS

Exhibit 4.1       The PNC Financial Services Group, Inc. Supplemental Incentive
                  Savings Plan, incorporated by reference from Exhibit 10.4 to
                  the Corporation's Annual Report on Form 10-K for the year
                  ended December 31, 1999. (File No. 1-9718).

Exhibit 4.2       The PNC Financial Services Group, Inc. and Affiliates Deferred
                  Compensation Plan, incorporated by reference from Exhibit
                  10.11 to the Corporation's Annual Report on Form 10-K for the
                  year ended December 31, 1999.

Exhibit 5         Opinion of Henry Howarth III, Senior Counsel, The PNC
                  Financial Services Group, Inc., filed herewith.

Exhibit 23.1      Consent of Henry Howarth III, Senior Counsel, The PNC
                  Financial Services Group, Inc., included in the opinion filed
                  as Exhibit 5 hereto.

Exhibit 23.2      Consent of Ernst & Young, LLP, filed herewith.

Exhibit 24        Powers of Attorney, filed herewith.