You generally have 60 days to submit an appeal after receiving a denial notice. The SSA assumes five extra days for mailing time, so the actual deadline is 65 days from the date of your decision. Under certain circumstances, however, the SSA will accept a late appeal if you have a good cause. Some reasons the SSA may consider a good cause for filing a late appeal include diminished mental capacity, hospitalization, lost mail, an incorrect address, etc. However, filing a good-cause statement for failing to meet a deadline can lead to delays in the processing of your claim. Therefore, it is important not to delay filing your appeal.