How long should a company keep purchase orders and accounts payable invoices after they're paid?

Paid invoices and purchase orders are accounting source documents, and how long you keep them is driven less by a single “right answer” than by overlapping legal, tax, and operational requirements. The safe approach is to set a retention period that satisfies the longest applicable obligation, then dispose of the records consistently under a written schedule.

Common Retention Benchmarks

Most organizations retain paid accounts-payable invoices and purchase orders for seven years after payment. That figure is a practical default rather than a universal rule, and it reflects a few converging factors:

• Tax records. The IRS advises keeping records that support items on a return until the period of limitations for that return expires. For most situations that period is several years, but it can be longer in specific circumstances, so accounting documents are commonly held toward the upper end of that range.
• Statutes of limitations on contracts. Purchase orders and invoices can be evidence in a contract dispute. The limitations period varies by state and by whether the contract is written, which is why many companies retain these records for several years after the transaction closes.
• Audit and financial-reporting needs. External auditors, lenders, and internal controls often require multiple years of supporting documentation.

How to Set Your Own Period

Rather than copying a number, build the retention period from the requirements that actually apply to you:

1. Identify the controlling tax, contract, and industry rules in your jurisdiction.
2. Add any contractual obligations (for example, government contracts and grants frequently carry their own, longer retention clauses).
3. Document the result in a retention schedule and apply it consistently. Keeping records far past their required period creates needless cost and discovery exposure; destroying them too early creates legal risk.

A Few Cautions

• Suspend disposition under a legal hold. If litigation, audit, or investigation is reasonably anticipated, stop the clock and preserve the records regardless of the schedule.
• Watch for sector-specific rules. Regulated industries, public entities, and federal contractors may face longer requirements.
• Treat electronic and paper copies alike. The retention rule follows the record’s content, not its format.

When in doubt, confirm current requirements with qualified tax and legal counsel, and explore retention fundamentals on our public records hub.