QuickLinks
 -- Click here to rapidly navigate through this document

 
 

Exhibit No. 10.6    
    


 
 

WASHINGTON MUTUAL, INC.
  RETIREMENT SAVINGS AND INVESTMENT PLAN AMENDMENTS    
    


        1.     Existing
Section 4.1(b) is replaced in its entirety by the following: 



        (b)   Safe Harbor Matching Contribution.    For any Participant who has completed twelve (12) months of
Service, a matching contribution by the Employer equal to the following: 



        (A)  One
Hundred (100) percent of a Participant's Salary Deferral Contributions not in excess of three (3) percent of the Participant's Considered Compensation. 


        (B)  Fifty
(50) percent of a Participant's Salary Deferral Contributions in excess of three (3) percent of the Participant's Considered Compensation but not in
excess of five (5) percent of the Participant's Considered Compensation. 





        2.     The
first sentence of Section 4.5 shall be amended to read as set forth below: 



For
each Plan Year, the Plan shall satisfy the nondiscrimination tests in section 401(m) of the Code and Treasury Regulations promulgated thereunder; provided, however, that the Plan shall be
deemed to satisfy such tests without regard to Sections 4.5(a)-(c) below for any Plan Year in which Employer Matching Contributions pursuant to Section 4.1(b) satisfy the contributions
requirements set forth in section 401(m)(11) of the Code and Treasury Regulations thereunder. 




        3.     The
first sentence of Section 5.2 shall be amended as set forth below: 



For
each Plan Year, the Plan shall satisfy the nondiscrimination tests in section 401(k)(3) of the Code and the Treasury Regulations promulgated thereunder; provided, however, that the Plan
shall be deemed to satisfy such tests without regard to Sections 5.2(a)-(c) below for any Plan Year in which Employer Matching Contributions pursuant to Section 4.1(b) satisfy the contributions
requirements set forth in section 401(k)(12) of the Code and Treasury Regulations thereunder. 




        4.     Section 7.5
shall be amended by the addition of new paragraph (k) to read as set forth below: 



        (k)   Notwithstanding
the foregoing, a Participant shall be fully vested at all times with respect to the portion of such Participant's Accrued Benefit attributable to
Matching Contributions made pursuant to Section 4.1(b)(1) with respect to Salary Deferral Contributions made with respect to Considered Compensation earned after December 31, 2003. 




        5.     The
portion of Section 8.10 that precedes the paragraph (a) is amended to read as follows: 



Restrictions on Distributions.    Notwithstanding anything to the contrary above, a Participant's Salary Deferral Account, and any amounts in
any other employer contribution accounts attributable to Qualified Employer Contributions or Matching Contributions made pursuant to Section 4.1(b)(1) with respect to Salary Deferral
Contributions made with respect to Considered Compensation earned after December 31, 2003, and any earnings on such Qualified Employer Contributions or Matching Contributions, shall not be
distributed before the first to occur of the following events: 




        Pursuant
to the authority delegated to him by the Human Resources Committee of the Board of Directors at its October 21, 2003 meeting, the undersigned officer of Washington
Mutual, Inc. hereby executes this instrument to be effective as of January 1, 2004. 



	WASHINGTON MUTUAL, INC.	 	 	 
	    	 	 	 	 
	

By:	

    
	
 	

Date:	

    

	Its:	Executive Vice President—Human Resources	 	 	 













QuickLinks



Exhibit No. 10.6


WASHINGTON MUTUAL, INC. RETIREMENT SAVINGS AND INVESTMENT PLAN AMENDMENTS