FOURTH AMENDMENT TO THE PROGRESSIVE CORPORATION EXECUTIVE DEFERREDCOMPENSATION PLAN (2003 Amendment and Restatement)

Exhibit 10.36

FOURTH AMENDMENT TO THE PROGRESSIVE CORPORATION

EXECUTIVE DEFERRED COMPENSATION PLAN

(2003 Amendment and Restatement)

WHEREAS, The Progressive Corporation Executive Deferred Compensation Plan is currently maintained pursuant to a 2003 Amendment and Restatement and the First through Third Amendments thereto (“Plan”); and

WHEREAS, it is deemed desirable to amend the Plan further;

NOW, THEREFORE, the Plan is hereby amended in the respects hereinafter set forth:

1. Effective September 1, 2005, Section 3.4 of the Plan is hereby amended and restated in its entirety to provide as follows:

Distributions of Deferrals of Restricted Stock Awards granted in 2005 and later years shall be made in Stock, with any fractional shares of Stock and any portion of such distribution that is derived from cash dividends on deferred Restricted Stock Awards to be made in cash. All other Plan distributions shall be made in cash.

2. Effective September 1, 2005, the last sentence in Article 3, Section 3.5 shall be deleted and replaced by the following provisions:

The provisions of Section 3.4 shall apply to all withdrawals under this Section 3.5.

3. Effective December 1, 2005, the following is hereby added to the Plan as new paragraph (k) of Section 2.2:

4. Except as expressly provided in this Amendment, the terms and provisions of the Plan shall remain entirely unchanged and continue in full force and effect.

IN WITNESS WHEREOF, the undersigned has hereunto caused this Amendment to be executed by its duly authorized representative effective as of the date set forth above.