How long the IRS says to keep tax returns
The Internal Revenue Service (IRS) recommends keeping your tax returns and the documents that support them for at least three years from the date you filed or the date the return was due, whichever is later. This three-year window covers most situations where the IRS might want to review your return or ask questions about deductions, income, or credits you claimed.
The three-year rule is the baseline, but it is not always the final answer. The IRS can go back further if they suspect underreporting of income, and certain situations require you to hold onto records longer. Understanding which documents fall into which category helps you know what to discard and what to store.
Key Takeaways
- The IRS standard is three years from the filing date or due date, whichever is later, for most tax returns and supporting documents.
- Keep records for six years if you underreported income by 25 percent or more, because the IRS has a longer window to audit you.
- Keep documents related to home purchases, home improvements, and investment property indefinitely, because they affect your basis when you sell.
- Keep records for seven years if you claim a loss from a worthless security or bad debt deduction.
- The IRS can go back indefinitely if they suspect fraud, though this is rare and requires evidence of intentional wrongdoing.
When six years is the right timeframe
If you left off income that should have been reported, and that missing income adds up to more than 25 percent of the gross income you did report on your return, the IRS has six years to audit you instead of three. This is called the "substantial underreporting" rule. You should keep all documents related to that return for the full six years to protect yourself if questions come up.
The six-year rule applies to the entire return, not just the part with the error. If your return showed $40,000 in income and you failed to report $15,000 (which is 37.5 percent of $40,000), the six-year clock starts ticking. Keep your receipts, bank statements, 1099 forms, and any other proof of what you earned for all six years.
Documents tied to property and investments
Records related to real estate, rental property, stocks, bonds, and other investments have a different rule: keep them for as long as you own the asset, plus three years after you sell it. This includes the original purchase documents, receipts for improvements, and records of what you paid for the property or investment.
These documents matter because they establish your cost basis — the amount you paid for the asset. When you sell a house, rental property, or investment, the IRS uses your basis to calculate whether you have a gain or loss. If you cannot prove what you paid, the IRS may assume a lower basis, which means a higher taxable gain. For a home you bought 20 years ago and sold last year, you would keep the purchase documents from the original purchase date, plus three more years from the sale date.
The same rule applies to home improvements. If you added a new roof, deck, or kitchen, keep the receipts and invoices. These increase your basis and reduce your taxable gain when you eventually sell. Keep them for the life of the home plus three years after the sale.
Worthless securities and bad debt deductions
If you claim a deduction for a security that became worthless or a debt that went bad, keep the supporting documents for seven years. This includes stock certificates, brokerage statements showing the security's value before it became worthless, and correspondence with the company or lender documenting the loss.
These deductions are less common than standard income or expense deductions, and the IRS scrutinizes them more closely. The seven-year window gives you a longer safety margin if questions arise about when the loss occurred or whether it truly qualifies for a deduction.
What happens if the IRS suspects fraud
If the IRS believes you intentionally underreported income or claimed false deductions as part of a deliberate scheme, there is no time limit. The IRS can go back as far as they want. However, this requires evidence of fraud — not just a mistake or a difference of opinion about how to treat an expense.
Fraud cases are rare and require investigation and documentation on the IRS's part. If you filed an honest return and made a good-faith error, the three-year or six-year rules explore. If you are ever contacted about a return from many years ago, that is a signal to consult a tax professional or attorney, because the IRS would not normally reach back that far without reason.
How to organize and store tax documents
A straightforward system is to keep each year's return and its supporting documents in a single folder or envelope, labeled with the tax year. Include the actual return you filed (or a copy), all 1099 forms, W-2 forms, receipts for deductions, bank statements that back up charitable donations or business expenses, and any other papers you used to fill out the return.
For documents you need to keep longer — property records, investment statements, home improvement receipts — create a separate file that you update as you make improvements or buy and sell assets. Digital storage works well for this: scan important documents and save them to a cloud service or external hard drive, keeping the originals in a safe place at home.
You do not need to keep the actual tax forms the IRS sent you (like the envelope or cover letter). You need the return itself and the documents that prove the numbers on it are correct.
State tax return requirements
Most states follow the IRS timeline or use a similar rule, but some states have longer windows. A few states allow three to four years for audit, while others go up to six or seven years in certain situations. If you live in a state with an income tax, check your state's tax agency website or ask a tax professional about the specific timeframe for your state.
The safest approach is to keep documents for the longest period required by either the IRS or your state. If your state requires seven years and the IRS requires three, keep them for seven. This way you are covered no matter which agency asks.
Frequently Asked Questions
Can I throw away a tax return after three years?
Only if it is a straightforward return with no property, investments, or unusually large deductions. If you own a home, rental property, or investments, or if you claimed significant business deductions, keep the return and supporting documents longer. When in doubt, keep it — storage is cheap and the cost of losing a document is high.
Do I need to keep the original receipts or just copies?
Copies are fine for most situations. The IRS accepts digital images, scans, and photocopies as long as they are clear and show all the relevant information. Original receipts are useful if the IRS audits you, because they are harder to dispute, but you do not have to keep the physical paper if you have a good digital copy.
What if I lost a document the IRS is asking about?
Tell the IRS you no longer have it and explain why. If you have other evidence — a bank statement, credit card statement, or a letter from the vendor — provide that instead. The IRS understands that people lose documents over time. What matters is that you tried to keep records and can show some proof of the transaction.
Do I need to keep documents for returns I did not file?
If you did not file a return for a year, the IRS has no time limit to assess taxes for that year. However, if you eventually file a return for that year, the three-year or six-year rule applies from the date you file it, not from the original due date. Consult a tax professional before filing an old return, because the rules are complex.
How long should I keep mortgage statements and property tax records?
Keep mortgage statements and property tax records for as long as you own the home, plus three years after you sell it. These documents support deductions you claim while you own the property and establish your basis for calculating gain or loss when you sell. After the three-year window closes, you can discard them.