For federal tax purposes, you should keep accounts payable invoices for at least three years after you file the return they support, but six or seven years is the safer default, and invoices tied to equipment, vehicles, or other depreciated property need to be held until three years after you sell or dispose of the asset.1Internal Revenue Service. How Long Should I Keep Records The penalty for coming up empty when the IRS asks is losing the deduction entirely, so the practical question is less about the minimum and more about which of your invoices fall into the longer categories.
The Three-Year Baseline
The standard retention period tracks the IRS statute of limitations for assessing additional tax. You keep records for three years from the date you filed the return or the return’s due date, whichever is later.1Internal Revenue Service. How Long Should I Keep Records Returns filed early are treated as filed on the due date, so sending your return in February doesn’t start the clock any sooner than April 15.
If your business filed its 2025 return on March 15, 2026, the three-year window runs from the April 15, 2026 due date through April 15, 2029. Any AP invoice supporting a deduction on that return needs to survive until at least that date.
When You Need to Keep Them Longer
Six Years for Substantial Underreporting
The IRS gets six years instead of three when a return omits more than 25% of gross income.2Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection The extended window covers the entire return, not just the unreported income, so every AP invoice connected to that year stays in play for the full six years.
The uncomfortable part is that you might not know an omission happened. A misclassified payment, a missed 1099, or an accounting error could push you over the 25% threshold without any intent to underreport. Holding invoices for six years is insurance against that scenario.
Indefinitely for Fraud or Unfiled Returns
If a return is fraudulent or was never filed, there is no statute of limitations and the IRS can assess additional tax at any time.3Internal Revenue Service. Time IRS Can Assess Tax Records supporting those years need to be kept indefinitely. Filing a delinquent return later only starts the three-year clock from the actual filing date, not from the original due date.
Property and Depreciated Assets
Invoices for equipment, vehicles, real estate, and other capitalized business assets follow a different timeline entirely. You keep those records until the statute of limitations expires for the tax year in which you sell or otherwise dispose of the asset.4Internal Revenue Service. Topic No. 305, Recordkeeping For a piece of equipment you depreciate over seven years and then sell in year eight, the original purchase invoice needs to be kept for roughly eleven years: eight years of ownership plus three more after the year of sale.
The distinction matters because an item you expensed immediately under the de minimis safe harbor election only triggers the standard retention period tied to that year’s return.5Internal Revenue Service. Tangible Property Final Regulations If an invoice was capitalized, it lives with the asset.
Four Years for Employment-Related Invoices
Invoices connected to payroll, contractor payments, or other employment costs follow a four-year retention rule. The clock starts from the date the employment tax is due or paid, whichever is later.1Internal Revenue Service. How Long Should I Keep Records This covers AP invoices from staffing agencies, payroll processors, and similar vendors whose charges feed directly into employment tax calculations.
The Seven-Year Default
Given these overlapping timelines, most accountants settle on seven years as a working rule. That covers the six-year assessment window for substantial underreporting with a one-year buffer, and it tends to satisfy state-level retention requirements, which vary and sometimes exceed the federal periods. The IRS itself doesn’t specify seven years, but the number is a comfortable margin for everything except property records and unfiled returns.
What a Retained Invoice Actually Needs to Show
Keeping an invoice only protects you if the invoice contains what the IRS expects. Supporting documents for expenses need to identify the payee, the amount paid, the date, and a description of what was purchased.6Internal Revenue Service. What Kind of Records Should I Keep For AP invoices, that means five elements:
- The vendor’s legal name and contact information.
- The date the goods were delivered or the service was performed. For accrual-basis taxpayers, this date determines which tax year the deduction belongs to.
- A description detailed enough to connect the purchase to your operations. “Professional services — $5,000” won’t hold up. “Website redesign for product launch, January through March 2026” will.
- The total amount, including any applicable taxes or fees.
- Payment terms, so the invoice reconciles cleanly with the actual payment date.
Description is where audits most often go sideways. A vague line item invites the examiner to question whether the expense was business-related at all. If a vendor sends invoices with generic descriptions, ask them to include the project name, deliverables, or service period before you approve payment. The invoice also needs a companion payment record. A bank statement or canceled check establishes that money actually left your account; the invoice establishes the business purpose. Lose either piece and an auditor can disallow the entire expense.6Internal Revenue Service. What Kind of Records Should I Keep
Travel, Meals, and Gifts
Travel, meals, and business gifts trigger heightened documentation under Section 274(d). Beyond the standard details, you need to record the business purpose, the business relationship of anyone who benefited, and the time and place of the expense.7eCFR. 26 CFR 1.274-5A – Substantiation Requirements A restaurant receipt for a client dinner should note the client’s name, the topic discussed, and the date and location. The fallback rules that sometimes rescue taxpayers with incomplete records for other expenses do not apply here.
Storing Invoices Electronically
The IRS accepts electronically stored invoices as long as the system meets Revenue Procedure 97-22, which remains in effect. The system has to produce accurate, complete copies of the originals and include controls that prevent unauthorized changes to the stored files, with an audit trail logging any modifications.8Internal Revenue Service. Revenue Procedure 97-22
Using a cloud accounting platform or a managed document provider doesn’t shift the obligation. You’re still responsible for making sure the records are accessible, legible, and retrievable within a reasonable timeframe if the IRS asks for them.9Internal Revenue Service. Revenue Procedure 98-25 – Requirements for Machine-Sensible Records Verify that your provider maintains backups and that you can export your data if you switch vendors.
One common mistake is discarding the electronic system before the retention period ends. If you cancel a software subscription or migrate platforms, you need to either export all stored invoices in a format that stays legible and complete or maintain access to the old system. The system has to survive as long as the records inside it are required to exist.
What Happens If You Can’t Produce an Invoice
If you’ve lost an invoice but can prove through other evidence that a legitimate business expense occurred, courts have historically allowed a deduction based on a reasonable estimate. This is the Cohan rule, from a 1930 appeals court decision holding that absolute certainty is often impossible and that the IRS should approximate rather than disallow a real expense outright.
Treat it as a last resort, not a plan. The deduction you get under Cohan will almost certainly be smaller than what you originally claimed, and the process of proving the estimate is uncertain and slow. Cohan also does not reach travel, meals, or gift expenses, which are locked into the strict Section 274(d) requirements. Lose the receipt for a client dinner and no amount of estimation will save it.
When the IRS disallows a deduction for lack of documentation, the immediate consequence is higher taxable income for that year. The damage usually goes further. The IRS applies a 20% accuracy-related penalty on the resulting underpayment when it’s attributable to negligence, and failing to keep adequate books and records qualifies as negligence under the tax code.10Office of the Law Revision Counsel. 26 U.S. Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments
Interest compounds the problem. The IRS charges interest on underpayments from the original due date of the return, not from the date of the audit. For the second quarter of 2026, the underpayment rate is 6% for most taxpayers and 8% for large corporations.11Internal Revenue Service. Internal Revenue Bulletin 2026-8 On a disallowed deduction from several years back, accumulated interest alone can rival the original tax deficiency.
Retention After the Business Closes
Shutting down a business does not end the recordkeeping obligation. The standard retention periods still apply to every return the business filed while it was operating. Property records for assets sold as part of the wind-down have to be kept until the statute of limitations expires for the year of final disposition.12Internal Revenue Service. Closing a Business Employment tax records from the final payroll still require the four-year hold.
This is one of the most overlooked retention issues. Owners close the doors, move on, and treat old records as clutter. Then a notice arrives two years later for an open tax year and the supporting documents are gone. If you’re winding down, make sure someone responsible has access to the records for the full retention period. Scanning everything into a secure digital archive before you close is the simplest fix.
Disposing of Invoices Once the Period Ends
Once AP invoices have cleared their full retention period, destroy them rather than tossing them. Invoices carry vendor tax identification numbers, bank account details, and pricing information that create risk if they end up in the wrong hands. Cross-cut shredding is the standard for paper. For electronic files, overwriting or certified data destruction software is the equivalent.
Before destroying anything, check whether your insurance carrier, lenders, or any active contract requires you to hold the records longer than the IRS does.1Internal Revenue Service. How Long Should I Keep Records A seven-year-old invoice might be past its tax shelf life but still relevant to an open warranty claim or insurance dispute.