How Long to Keep Corporate Tax and Audit Records

The IRS generally has three years from the filing date to examine a return, six years if you omit more than 25 percent of the gross income shown on the return, and no time limit at all if a return was never filed or was fraudulent. That's the floor, not the ceiling, for how long to keep supporting records. Records tied to an asset's basis, equipment, property, an ownership stake, need to survive until well after that asset is disposed of, since the basis calculation on a sale years from now depends on records from the year of purchase.

Different document types genuinely need different retention periods.

• Filed tax returns and supporting workpapers: keep permanently, or at minimum well beyond the standard examination window
• Records supporting an asset's basis (purchase documents, capital improvements): keep until well after the asset is sold or fully depreciated
• Payroll tax records and Forms W-2/1099: keep for several years past the filing, longer if a worker classification dispute is possible
• Corporate formation documents, bylaws, and equity records: keep permanently
• Board minutes and major corporate resolutions: keep permanently

A retention policy isn't only about keeping records long enough; it's also about actually deleting or archiving records once their retention period passes, on a documented schedule rather than an indefinite hoard. An indefinite retention habit for everything can actually create risk in litigation or a broad document request, since more records existing means more records that could contain something unhelpful. A written, consistently applied schedule that's actually followed protects you better than either extreme: losing things too early or keeping everything forever.

The failure mode isn't usually a policy that's too short on paper; it's records that were supposed to be kept but got lost anyway, a departed employee's laptop, a closed vendor's portal, an acquired subsidiary's records that never made it into the parent's system. Building retention around actual, centralized storage that survives personnel and system changes matters more than the specific number of years written in the policy document, since a policy that says seven years means nothing if the records were only ever on one person's hard drive.

Net operating loss carryforwards, tax credit carryforwards, and any position you're still relying on in a current year's return need their original supporting records kept until that carryforward is fully used and its own examination window closes, which can mean keeping records for a decade or more after the year they were originally generated. The same logic applies to records supporting any legal settlement, ongoing litigation, or a transaction still generating tax consequences in later years; tie retention to when the position stops mattering, not to a flat number of years from creation.

A retention schedule only works if something on your calendar actually triggers a review, so tie it to an event that already happens every year rather than hoping someone remembers. Pair an annual records review with your year-end close or your annual board meeting, checking what's aged past its retention period and can be archived or destroyed, and confirming that anything tied to a still-open carryforward or ongoing matter is flagged to stay put. Treat the review itself as a recurring line item with an owner, the same way you'd treat a recurring compliance filing, rather than a one-time project that quietly stops happening after the first year.