Keep tax returns and supporting documents for at least three years

The Internal Revenue Service (IRS) can examine your tax return for three years from the date you file it. That means you should keep your original tax return, all worksheets, receipts, bank statements, and other documents that support the numbers on your return for at least three years. If you file early, the three-year window starts from the official tax important date (April 15), not the date you actually submitted your return.

Three years is the baseline, but the actual time you need to keep records depends on your situation. If you claim a loss or deduction that the IRS questions, you may need to produce those documents years later. The IRS has longer timeframes in certain cases, and some records are worth keeping even after the standard period ends.

Key Takeaways

  • Keep all tax returns and supporting documents for at least three years from the filing important date, since that is the standard IRS examination window.
  • If you underreport income by 25 percent or more, the IRS can examine your return for six years instead of three.
  • Keep records related to home purchases, retirement accounts, and investment sales indefinitely, because these affect future tax years even after the original return period expires.
  • The three-year rule applies to federal taxes; your state may have a different retention requirement, so check your state tax agency's guidance.

When the IRS can look back longer than three years

The three-year window extends to six years if you underreport your income by 25 percent or more on your return. For example, if your actual income was $100,000 but you reported only $75,000, the IRS has six years to examine that return. This is sometimes called the "substantial underreporting" rule, and it applies whether the underreporting was intentional or a mistake.

There is no time limit at all if the IRS suspects fraud or if you did not file a return in a given year. If you file a fraudulent return, the IRS can examine it indefinitely. If you straightforward did not file, there is no statute of limitations on when they can pursue you. This is why keeping records longer than three years is often the safer choice.

Records to keep indefinitely

Some documents should be kept much longer than three years because they affect your taxes across multiple years. Keep records related to the purchase and sale of a home, including the original purchase price, closing documents, and receipts for major improvements. These records determine your cost basis when you eventually sell, which directly affects how much capital gains tax you owe. The IRS can ask for these documents years after the sale.

Keep records for any retirement account contributions, rollovers, and distributions for as long as you own the account and for several years after you close it. The same applies to investment purchases and sales—keep the original purchase confirmation and sale documents indefinitely, since the IRS may question your cost basis years later. If you claim a loss that you carry forward to future years, keep the original loss documentation until the loss is fully used up.

Keep records of large gifts you receive or give, especially if they approach the annual gift tax exclusion limit. Keep records of any business assets you own, including depreciation schedules and improvements, for as long as you own the asset and for at least three years after you sell or dispose of it.

What counts as supporting documentation

Supporting documentation includes anything that proves the numbers on your tax return are correct. For income, this means W-2 forms, 1099 forms, pay stubs, and bank statements showing deposits. For deductions, keep receipts, invoices, cancelled checks, credit card statements, and mileage logs. If you claim a home office deduction, keep photos of the space and records of utilities and rent or mortgage payments allocated to that room.

For charitable donations, keep written acknowledgment from the charity for donations of $250 or more. For medical expenses, keep receipts and explanation of benefits (EOB) statements from your insurance. For business expenses, keep receipts even for small purchases under $75—the IRS does not require receipts for these, but having them protects you if your return is examined. For investment losses, keep the original purchase confirmation and the sale confirmation showing the loss.

Digital records and paper copies

You can keep records in digital form—scanned copies, PDFs, or photos of receipts are acceptable to the IRS. Many people photograph receipts with their phone and store them in a folder on their computer or cloud storage. This works as long as the image is clear enough to read all the important information: the date, the amount, what was purchased, and the vendor name.

If you keep digital copies, make sure you have a backup. Store copies in at least two places—your computer and cloud storage, for example. If you use accounting software or tax software that stores records, verify that the software keeps backups and that you can retrieve your records if the company goes out of business. Paper copies stored in a safe place are also acceptable and do not require backup in the same way.

State tax record retention requirements

Your state may require you to keep records for a different length of time than the federal requirement. Most states follow the federal three-year rule, but some require longer retention. Check your state tax agency's website or call their helpline to confirm the requirement for your state. If your state requires records to be kept longer than three years, follow the state requirement since it is more protective of you.

If you file in multiple states—for example, if you worked in one state and lived in another—keep records for the longest retention period required by any state where you filed. Some states also have different rules for business income versus wage income, so verify the specific rule that applies to your situation.

What to do with old records after the retention period ends

Once you have kept records for the required time and you are confident the IRS will not examine that year's return, you can shred or delete them. For sensitive documents like tax returns and financial statements, shred paper copies rather than throwing them in the trash. For digital files, use a file deletion tool that overwrites the data rather than straightforward moving the file to the trash, since deleted files can sometimes be recovered.

Before you discard anything, double-check that it does not relate to an ongoing issue. If the IRS has sent you a notice about a particular year, keep all records for that year until the matter is resolved. If you are in the middle of a business sale or real estate transaction, keep all related records until the transaction closes and any contingencies are satisfied.

Frequently Asked Questions

Do I need to keep the actual paper return the IRS sent me, or just my copy?

Keep your copy of the return you filed, along with all supporting documents. You do not need to keep IRS correspondence unless it relates to an examination or dispute. Your filed return and your worksheets are what matter if the IRS asks questions.

What if I filed an amended return—how long do I keep those records?

Keep amended returns and all documents supporting the amended return for the same three-year period (or longer if applicable) as the original return. The three-year window runs from the date you filed the amended return, not the original return date.

Can I throw away receipts if I have the credit card statement showing the charge?

The credit card statement alone is usually not enough if the IRS questions a deduction. Keep the actual receipt or invoice showing what was purchased, not just proof that you paid. The statement shows you spent money; the receipt shows what the money was for.

How long should I keep records if I am self-employed?

Keep business records for at least three years, but many tax professionals recommend keeping them for seven years because business returns are examined more often than wage-earner returns. Keep records of all income, expenses, equipment purchases, and depreciation for the full retention period.

What if the IRS has not contacted me in five years—can I assume they will not?

The standard three-year window has passed, but the IRS can still examine older returns if they suspect underreporting of income by 25 percent or more, or if they suspect fraud. Keep records for at least six years to be safe, and keep records related to assets and investments indefinitely.