How long should a business keep accounts payable records like invoices and purchase orders?

There is no single universal answer. The right retention period for accounts payable records depends on the laws that apply to your organization, your tax situation, and your own operational and legal needs. The goal is to keep these records long enough to satisfy every obligation, then dispose of them in a consistent, documented way.

Start With the Tax Baseline

For most U.S. businesses, the practical floor is driven by tax recordkeeping rules. Supporting documents for expenses, including invoices, purchase orders, and proof of payment, generally need to be kept long enough to back up what you reported on a return. The IRS advises retaining records that support income or deductions until the period of limitations for that return expires, which for many situations is several years and can be longer in specific circumstances. Because these periods vary by situation, confirm the exact length that applies to you rather than assuming a single number.

Layer In Other Obligations

Tax is only one driver. Accounts payable records may also be subject to:

• Contractual or audit requirements, including vendor agreements, grants, or government contracts that specify retention.
• State and local laws, which can differ from federal rules.
• Statutes of limitations for contract disputes, where keeping invoices and POs helps prove what was ordered and paid.

Keep records for the longest applicable period when several rules overlap.

Build a Retention Schedule

Rather than deciding case by case, the sound practice is to set the period once in a written records retention schedule, then apply it consistently. A defensible schedule:

• Identifies each record type (invoices, purchase orders, payment records).
• Assigns a retention period tied to a legal or business justification.
• Defines a clear trigger and start date, such as the end of the fiscal year or contract close.
• Authorizes routine, documented disposition once the period ends.

Handle Holds and Disposal Carefully

If litigation, audit, or investigation is reasonably anticipated, suspend disposal under a legal hold until the matter clears. Otherwise, destroying records on schedule is appropriate and expected. Have legal, tax, and records professionals review the schedule periodically and document your decisions.

For broader context on retention schedules, holds, and lifecycle management, see our information governance topic hub.