Subrecipients must keep all source documentation for each project for 3 years after the final expenditure report is transmitted. Recipients keep financial and program records for 3 years after submitting the final SF-425. Longer periods apply for property, audits, litigation and some state laws.
A retention schedule by disaster and project, tied to the final expenditure report and SF-425 dates.
Retention runs from the end of the grant, not the disaster. Set retention by project, because a large disaster can stay open for many years.