Completion of the Filing Process · Record maintenance
Length of time to retain returns and records
tax year · reviewed 2026-08-19 · N. O.
- Return filed (or its due date, if filed early) The retention clock for that year starts
- 3 years Ordinary case — none of the longer triggers below applies
- 3 years from filing, or 2 years from payment, whichever is later A refund claim was filed after the return
- 6 years Unreported income exceeds 25% of the gross income shown on the return
- 7 years A loss from worthless securities or a bad debt deduction
- Indefinitely No return was filed, or the return filed was fraudulent
The rule
There is no single retention period, and answering “three years” to a client is right about as often as it is wrong. The governing principle is that records supporting an item of income, deduction or credit are kept until the period of limitations for that return runs out — so retention is derived from the limitations period rather than fixed independently of it. The IRS states the principle that way, and the periods below are its application.
Underneath sits the record-keeping obligation itself. Every person liable for tax must keep such records as the Secretary prescribes (IRC § 6001), and the regulation requires (Reg. § 1.6001-1(a)) Verified 2026-08-18Reg. § 1.6001-1(a) — https://www.law.cornell.edu/cfr/text/26/1.6001-1. Reg. § 1.6001-1(e) then states the retention standard in terms that are broader than any numbered period: records must be Verified 2026-08-18Reg. § 1.6001-1(e) — https://www.law.cornell.edu/cfr/text/26/1.6001-1.
Current figures
| Situation | Keep records for |
|---|---|
| Ordinary case, none of the below applying | Verified 2026-08-19IRS, How long should I keep records? (irs.gov, Small Businesses and Self-Employed), read 19 August 2026 — https://www.irs.gov/businesses/small-businesses-self-employed/how-long-should-i-keep-records |
| Claim for credit or refund filed after the return | Verified 2026-08-19IRS, How long should I keep records? (irs.gov, Small Businesses and Self-Employed), read 19 August 2026 — https://www.irs.gov/businesses/small-businesses-self-employed/how-long-should-i-keep-records |
| Claim for a loss from worthless securities or a bad debt | Verified 2026-08-19IRS, How long should I keep records? (irs.gov, Small Businesses and Self-Employed), read 19 August 2026 — https://www.irs.gov/businesses/small-businesses-self-employed/how-long-should-i-keep-records |
| Unreported income above the substantial omission threshold | Verified 2026-08-19IRS, How long should I keep records? (irs.gov, Small Businesses and Self-Employed), read 19 August 2026 — https://www.irs.gov/businesses/small-businesses-self-employed/how-long-should-i-keep-records |
| No return filed, or a fraudulent return filed | Verified 2026-08-19IRS, How long should I keep records? (irs.gov, Small Businesses and Self-Employed), read 19 August 2026 — https://www.irs.gov/businesses/small-businesses-self-employed/how-long-should-i-keep-records |
| Employment tax records | Verified 2026-08-19IRS, How long should I keep records? (irs.gov, Small Businesses and Self-Employed), read 19 August 2026 — https://www.irs.gov/businesses/small-businesses-self-employed/how-long-should-i-keep-records |
| Preparer’s copy or list of returns prepared | Verified 2026-08-18IRC § 6107(b) |
Unless otherwise stated the years run from the date the return was filed, and a return filed before the due date is treated as filed on the due date.
How it works in practice
The six-year period tracks IRC § 6501(e). Records are kept for six years where income that should have been reported was omitted and the omission exceeds twenty-five per cent of the gross income shown on the return. That is the retention counterpart of the substantial omission rule, under which the tax may be assessed within six years after the return was filed. Section 6501(e)(1)(A)(ii) adds a second trigger for omissions above a stated amount attributable to assets reportable under IRC § 6038D — the foreign financial asset reporting provision — which the retention guidance does not separately call out but which a client with foreign assets should be told about.
“Indefinitely” means what it says, and it has two triggers. No return filed, and a fraudulent return filed. In both cases the assessment period never begins to run, so no retention period can expire. This is the answer to the exam question about a record with no retention limit.
Employment tax records are on their own clock. At least four years after the date the tax becomes due or is paid, whichever is later — a rule that does not correspond to any of the income tax periods and is easy to overlook in a practice that files both.
Property records outlive the year they were acquired in. Records relating to property are kept until the limitations period expires for the year in which the property is disposed of, because they are needed to figure depreciation, amortisation or depletion and to compute gain or loss on disposition. Where property was received in a nontaxable exchange, the basis carries over, so the records on the old property must be kept alongside those on the new one until the limitations period expires for the year the new property is disposed of. A client who bought a building in 2004, exchanged it in 2016 and sells in 2031 needs the 2004 documents in 2031.
A refund claim can extend the period past three years. Where a claim for credit or refund is filed after the return, records are kept for three years from the date the original return was filed or two years from the date the tax was paid, whichever is later — the retention mirror of the IRC § 6511 claim period. A client who paid an assessed balance late has a longer retention obligation than the filing date alone would suggest.
Non-tax reasons often govern. The IRS’s own guidance says that when records are no longer needed for tax purposes they should not be discarded without checking whether they must be kept longer for other purposes — an insurance company or a creditor may require it. Advising a client to destroy records at the end of a tax period without that check is advice about tax that reads as advice about records.
The practitioner’s own obligations are separate and stack. A tax return preparer must retain a completed copy of each return or claim, or a list of the taxpayer names and identifying numbers, for Verified 2026-08-18IRC § 6107(b). An ERO must retain Forms 8878 and 8879 for Verified 2026-08-19Publication 1345, Handbook for Authorized IRS e-file Providers of Individual Income Tax Returns (Rev. 12-2025). Neither period is derived from the client’s limitations period, and satisfying one does not satisfy the other.
The like-kind exchange from a previous decade
Théophile Nakamura-Brennan sells a commercial building. His accountant asks for the acquisition records and is told that everything before 2018 was shredded under a “seven-year rule” the firm adopted years ago.
The building came into his hands through a like-kind exchangeTrading one piece of real property held for business or investment for another, without immediately recognizing the gain, because the taxpayer's investment simply continues in a new form. in 2015, and the carryover basisWhen property is given as a gift, the person who receives it generally keeps the giver's original basis, rather than starting fresh at the property's value on the day of the gift. came from a property acquired in 2003. Records relating to property are kept until the limitations period expires for the year in which the property is disposed of, and where basis carried over from relinquished property, the records on that old property must be kept too. The retention rule and the carryover-basis rule interact here: a numbered retention period written for an ordinary sale runs out on its own schedule, but a carried-over basis reaches back to whichever year the basis actually originated in, and the two rules together are what put 2003 documents on the hook in a 2031 sale. Without them the basis has to be reconstructed from whatever third-party evidence survives — county records, the closing file, the exchange intermediary — and the gain is computed under a cloud. A blanket destruction schedule expressed in years, applied to a file containing carried-over basis, is the mechanism that produced this.
The omission that changed the answer
Ludovica Achterberg-Sørensen’s 2021 return shows gross income of about 180,000 dollars. In 2026 she discovers that a brokerage account producing roughly 62,000 dollars of income was never reported. She asks whether the year is “closed.”
It is not. The omission exceeds twenty-five per cent of the gross income shown on the return, so the assessment period is six years rather than three, and the records for that year should be retained accordingly. The retention question and the exposure question have the same answer because they come from the same statute. The right advice covers both: keep everything for that year, and address the omission — a qualified amended return or other corrective route — rather than waiting out a period that has not run.
The year with no return
A new client has filed nothing for one year eleven years ago and assumes it is beyond reach.
That assumption fails, and the reason is structural rather than a matter of degree. A statute of limitationsA deadline after which the IRS generally can't assess more tax, or a taxpayer generally can't claim a refund, for a given year. Different actions have different clocks, and some events pause or restart the clock. has to start running before it can ever expire, and where no return is filed there is no assessment period to start — so nothing expires and records should be kept indefinitely. The same is true of a fraudulent return. This is the practical reason the answer to “how long must I keep records” cannot be given without asking what happened in the year — the periods are consequences of the facts, not a schedule that applies regardless of them. Filing the missing return is what starts a clock that can eventually run.
The plain three-year file
Marguerite Oyelaran-Whitfield has one W-2, the standard deduction, no worthless securities, no omitted income, no fraudulent return, and no refund claim filed after the original. She files on time every year and asks how long to keep each year’s file.
This is the ordinary case the default period is built for: three years from the filing date, and nothing about her facts extends it. She can discard a given year’s records once three years have passed since she filed that return, provided nothing later surfaces — an amended return, a notice, a carryover item — that would reopen the question. Most individual filers are in exactly this position most years, which is also why a longer period so often surprises a client who has never needed one before.
The preparer's own file, kept on its own schedule
A client’s return is prepared and filed in March 2023. The client keeps a full paper copy for herself. In 2025 she loses it in a move and asks her preparer for a replacement.
The preparer’s retention duty under IRC § 6107(b) is not a copy of the client’s obligation — it runs on its own three-year clock from the close of the return period, and it can be satisfied with a list of taxpayer names and identifying numbers rather than a full copy of the return. If the preparer kept only the list, there is no return to hand back, only confirmation that one was filed; the client’s own copy was always the client’s to keep. The two retention duties are procedurally separate: they start from different dates, run for different reasons, and neither substitutes for the other.
How this has changed
The framework is old and stable: IRC § 6001 and Reg. § 1.6001-1 have carried the record-keeping obligation and the materiality standard for decades, and the retention periods have tracked the limitations periods throughout. The one substantive addition of recent decades is the second substantial omission trigger in IRC § 6501(e)(1)(A)(ii), added by the Hiring Incentives to Restore Employment Act in 2010, which extends the assessment period to six years for omissions above a stated amount attributable to assets reportable under IRC § 6038D — regardless of the twenty-five per cent test. A client with foreign financial assets can therefore be in a six-year period on a modest omission that would not come close to the percentage threshold.
What has changed more visibly is the medium. Electronic records satisfy the obligation, and a practice that keeps a client’s file in a document management system is compliant — but the materiality standard in Reg. § 1.6001-1(e) requires the records to remain available for inspection, which puts a migration and readability obligation on the firm that a filing cabinet never had.
Exam focus
Learn the six taxpayer periods as a set: three years ordinarily; three years from filing or two from payment, whichever is later, for a refund claim; seven years for worthless securities or a bad debt; six years for an omission above twenty-five per cent of gross income shown; indefinitely for no return or a fraudulent return; four years for employment tax records. The twenty-five per cent threshold and the indefinite period for fraudulent or unfiled returns are the two most commonly tested. Keep the preparer’s three-year obligation under IRC § 6107(b) separate from all of these.
Check yourself
1. The retention period for a return increases from three years to six where omitted income exceeds what proportion of the gross income shown on the return?
A. 10 per cent B. 15 per cent C. 25 per cent D. 40 per cent
Answer: C. It mirrors the substantial omission rule that extends the assessment period to six years.
2. Which of these has no retention limit?
A. An ordinary tax return B. A fraudulent return C. Employment and payroll tax records D. None of these
Answer: B. Records should also be kept indefinitely where no return was filed; in both cases no assessment period ever begins to run.
3. How long must employment tax records be kept?
A. Three years from the date the return was filed B. At least four years after the date the tax becomes due or is paid, whichever is later C. Six years from the end of the calendar year D. Indefinitely
Answer: B.
4. A taxpayer received a building in a nontaxable exchange and later sells it. Which records must be retained until the limitations period for the year of sale expires?
A. Records on the replacement property only B. Records on the relinquished property only C. Records on both the relinquished and the replacement property D. Neither, once three years have passed since the exchange
Answer: C. Basis carried over, so the old property’s records are needed to compute gain or loss.
5. A taxpayer files a claim for refund two years after filing the original return and one year after paying an assessed balance. How long should the supporting records be kept?
A. Three years from the date the original return was filed B. Two years from the date the tax was paid C. The later of three years from filing the original return or two years from paying the tax D. Seven years from the date of the claim
Answer: C. The retention rule mirrors the claim period.
Change log
- Initial draft.
- Added a plain-language summary, glossary marks, two typed scenarios, and a timeline diagram of the retention periods by triggering fact.