Keep tax returns and supporting documents for at least three years from the date you filed

The Internal Revenue Service (IRS) can audit your return up to three years after you file, so that is the baseline. If you underreported income by 25 percent or more, the IRS can go back six years. If you did not file a return at all, there is no time limit — the IRS can pursue you indefinitely. For most people, three years is the safe minimum.

What matters is not when you filed, but when the IRS could still challenge you. If you file in April for the previous year, your three-year window starts from that April filing date, not from January 1 of the tax year itself. Keep records until three full years have passed with no contact from the IRS about that return.

The documents you need to keep are not just the return itself. You need the receipts, invoices, bank statements, and other papers that back up what you reported — especially if you claimed deductions, reported business income, or took credits. The IRS does not ask for these when you file, but if they audit, you must produce them or lose the deduction.

Key Takeaways

  • Keep your filed tax return and all supporting documents for at least three years from the filing date, because the IRS can audit within that window.
  • If you underreported income by 25 percent or more, keep records for six years instead.
  • Supporting documents include receipts, invoices, bank statements, mortgage statements, and anything else that proves what you reported on the return.
  • For home sales, retirement account contributions, and major asset purchases, keep records for as long as you own the asset, plus three years after you sell it.

What counts as supporting documents

If you took the standard deduction and reported only W-2 wages, you technically need very little beyond the return itself. But if you itemized deductions, reported self-employment income, or claimed credits, you must keep the papers that prove those numbers.

For deductions, this means receipts for charitable donations, property tax bills, mortgage interest statements (Form 1098), medical bills, and business expenses. For income, keep 1099 forms, invoices you sent to clients, bank deposits, and profit-and-loss statements. For credits like the child tax credit or education credits, keep documents showing the dependent's Social Security number, school enrollment, or tuition paid.

Digital copies count. A photograph of a receipt, a PDF read from your bank, or an email confirmation of a donation are all acceptable. The IRS does not require original paper documents, though having them is safer if the digital version is questioned.

When to keep records longer than three years

Certain situations require you to hold onto records much longer. If you own a home, keep the purchase documents, closing statement, and receipts for major improvements (roof, foundation work, new HVAC system) indefinitely. When you sell, you will need these to calculate your cost basis and determine whether you owe capital gains tax. Keep them for three years after the sale as well, in case the IRS audits that year's return.

The same rule applies to stocks, bonds, and other investments. Keep purchase confirmations and cost basis records for as long as you own the asset, then for three years after you sell. If you inherited property or received it as a gift, the rules are different — keep those documents permanently, because your cost basis depends on the date of death or the date of the gift, and the IRS may ask about it years later.

For retirement accounts like IRAs and 401(k)s, keep contribution records and distribution statements indefinitely. The IRS tracks whether you have already paid tax on money you put in, and if you cannot prove it, you may pay tax twice on the same dollars.

How to organize and store records

Create a folder for each tax year and put the filed return, all supporting documents, and a list of what is in the folder inside it. Label it clearly with the year. Store it somewhere dry and safe — a filing cabinet, a closet shelf, or a safe deposit box all work. Do not rely on a single digital copy on your computer; back it up to an external drive or cloud storage in case of hardware failure.

For records you need to keep longer than three years (home improvements, investment purchases, inherited property), use a separate system so you do not accidentally throw them away when you clean out old tax files. Many people keep a "permanent records" folder and move documents into it as they accumulate.

If you use tax software or work with a tax preparer, ask them whether they keep copies. Many do, but not indefinitely. Do not assume someone else is storing your records for you.

What happens if you throw records away too early

If the IRS audits a return and you cannot produce the supporting documents, you lose the deduction or credit you claimed. The IRS will disallow it, and you will owe the tax plus interest and possibly penalties. This is why the three-year window matters — once it closes, the IRS cannot audit that return, so you can safely discard the records.

The exception is if the IRS has already contacted you about a return or sent you a notice. Once an audit begins, do not throw away anything related to that year. Keep all records until the audit is closed and you have received a final letter from the IRS saying the matter is resolved.

State tax records and special situations

Some states have longer audit windows than the federal government. New York, for example, can audit up to six years after filing. If you live in a state with a longer window, follow that state's timeline instead of the federal three-year rule. Check your state's tax agency website for the specific period.

If you are self-employed, the rules are stricter. The IRS scrutinizes business returns more closely, and audits can go back further if there are red flags. Keep business records for at least six years, and consider keeping them longer if your business involves inventory or long-term contracts.

If you received a notice from the IRS about a specific issue — even if it was resolved — keep those records indefinitely. The same issue could come up again on a later return, and having the history helps you prove you handled it correctly before.

Frequently Asked Questions

Can I throw away my tax return after three years?

Yes, if the IRS has not contacted you about that return and you have not underreported income by 25 percent or more. Three years from the filing date is the standard safe point. However, keep supporting documents for longer if they relate to assets you still own, such as a home or investments.

Do I need to keep the original paper return or is a copy okay?

A copy is fine. What matters is that you can prove what you reported and that you have the documents backing it up. A PDF of your filed return or a copy from your tax software is sufficient. Keep the original if you have it, but do not worry if you only have a copy.

What if I filed electronically — do I still need to keep records?

Yes. Electronic filing does not change the record-keeping requirement. You still need the supporting documents that prove your income, deductions, and credits. The IRS does not receive those documents when you e-file; you keep them in case of an audit.

How long should I keep records for a home I sold five years ago?

Keep them for three years from the year you sold it. If you sold in 2021, keep the records through the end of 2024. After that, you can discard them unless the IRS has contacted you about that sale or you are still dealing with a related issue.

What if the IRS is currently auditing me — when can I throw things away?

Do not throw away anything until the audit is completely closed and you have received a final letter from the IRS. Once you have that letter, follow the standard three-year rule from that point forward. If the audit results in changes to your return, the three-year window may restart.