Taxpayers seeking to contest the values established by the local assessor have a short time to contest their new valuation. This time frame varies by state and by local jurisdiction and in many cases begins to run upon mailing of a new value notice.
| State or Jurisdiction | Deadline |
| Maine | | July through January - within 185 days from the Commitment Date | |
| Washington | | July 1st or 30 or 60 days after notice; most counties are August & September | |
| Pennsylvania | | August 1st or September 1st for properties not located in Allegheny or Philadelphia Counties: Philadelphia is October 1st | |
| Rhode Island | | August - 90 days from tax bills | |
| Utah | | July 1st through October 31st -within 30 days of notice; most counties are August 10th | |
| Arkansas | | 3rd Monday in August (August 19th) | |
| Florida | | August through September - within 25 days of TRIM notice | |
| California | | September 16th or December 2nd - varies by County | |
| Massachusetts | |
