How long do we have to keep employee expense reports and reimbursement receipts?

There is no single universal answer, but the question can be answered with confidence using a few governing principles. Expense reports and reimbursement receipts are financial records, and their retention is driven by tax law, audit needs, and—for government bodies—an approved records schedule.

The Practical Baseline

For most private-sector organizations, expense reports and supporting receipts are tied to the business tax return they substantiate. The IRS advises keeping records that support items of income or deductions until the period of limitations for that return expires. For many returns that period is several years; certain situations (such as unfiled or substantially understated returns) extend it considerably. Because a single year’s expense reimbursements may feed into a tax filing, a common, defensible practice is to retain these records for roughly seven years from the end of the relevant tax year. This window comfortably covers the typical audit and limitations periods.

What Determines the Actual Period

Several overlapping requirements can lengthen the retention period:

• Tax substantiation – records proving deductible business expenses must survive the limitations period for the related return.
• Audit and reimbursement disputes – internal and external audits may reach back several years.
• Employment and wage rules – if reimbursements interact with payroll or wage records, those obligations can impose their own minimums.
• Litigation or investigation holds – an active or anticipated legal matter suspends all routine disposition until the hold is lifted.

Government and Federal Context

Federal agencies do not choose freely. Routine administrative and financial records—including travel, expense, and reimbursement documentation—are typically covered by the National Archives General Records Schedules, which set government-wide retention periods. State and local governments follow their own state archives schedules. Always check the applicable schedule before destroying anything.

How to Build Your Rule

1. Identify the longest applicable requirement (tax, audit, employment, contractual).
2. Set retention to meet that longest period, not the shortest.
3. Apply legal holds that override scheduled disposition.
4. Document the rule in your retention schedule and dispose consistently once the period lapses.

When unsure, retain to the longest credible requirement and confirm the exact period with counsel or your records officer. For more foundational concepts, see the Fundamentals topic hub.