Guide

Tax retention: three years, six years, forever — by document

Summary

Keep most tax records at least three years — the usual window the IRS has to examine a return. Stretch it to six years if you underreported income by more than 25%, and keep records indefinitely if you never filed or filed fraudulently. Employment-tax records run four years. Some documents — the paperwork proving what you paid for an asset, your entity formation, prior returns — you keep for as long as they matter. Clinical records follow a separate, state-set clock.

By Gale Editorial · Updated 2026-07-27. Every figure cited to a dated source. How we write.

The retention clock, in one paragraph

Keep the records behind a tax return for as long as the IRS can still question that return. For most returns that is three years from the date you filed 1. The clock runs longer in specific cases: six years if you left off more than 25% of your gross income, and no time limit at all if you never filed a return or filed a fraudulent one 1.

A handful of records outlive the return that used them — anything that proves what you paid for an asset, and the papers that established your business, stay useful for years after any single filing. Everything on this page is about financial and tax records. Your clinical charts run on a separate clock your licensing board sets, covered under records-retention rules for your state — do not fold the two together.

A retention table by document

Different papers carry different clocks, so a single "keep seven years" rule of thumb either throws out something you still needed or hoards everything forever. This table maps the common solo-practice documents to the minimum the IRS rules imply, so you can match each item to its own clock rather than guessing at one number for all of them 1.

DocumentKeep for
Filed tax returnsIndefinitely (they prove you filed)
Supporting records for a normal return (income, deduction receipts)3 years from filing
Records where income was underreported by 25%+6 years
Any year you did not file or filed fraudulentlyIndefinitely
Employment/payroll tax records4 years after the tax is due or paid
Records that establish an asset's cost (basis)Life of the asset + the limitation period after you sell it
Entity formation, EIN letter, S-election acceptanceIndefinitely

When a single document supports more than one return — a piece of equipment you depreciate over several years — keep it for the longest clock that touches it, not the shortest.

Why 'three years' really means the assessment window

The three-year figure is not arbitrary; it is the period of limitations — the window in which the IRS can generally assess additional tax and in which you can amend to claim a refund 1. Keep the records that support every item of income, deduction, and credit until that window closes for the return that used them. In practice that means three years after you filed, or two years after you paid the tax, whichever is later.

The window widens with the size of the problem. Omit more than 25% of your gross income and the IRS gets six years to look 1. Never file, or file a return the IRS later deems fraudulent, and there is no limitations period — the records stay relevant indefinitely. For a solo clinician this rarely bites, but it is the reason "three years" is a floor, not a ceiling.

Keep the proof, not just the return

A return is only as defensible as the records behind it, so the retention that matters most is the substantiation for every deduction you claimed. Ordinary and necessary business expenses — continuing education, licensure and board fees, clinical supervision, malpractice premiums, office and software costs — are deductible, and if examined you have to be able to show what you spent and why it was a business cost 2. Keep the receipt, the invoice, or the statement, not just the line on the return.

Two categories need longer memories. Equipment you depreciate — a telehealth setup, office furniture, a §179 write-off — carries records you keep for as long as you own the asset plus the limitation period after you dispose of it, because those papers establish your basis and your depreciation history 3. And if you take the home-office deduction for a telehealth-from-home practice, keep what proves regular and exclusive use and the method you chose, whether the simplified square-foot rate or actual expenses 4.

Employment-tax records: the four-year rule if you have staff

Once you have a W-2 employee, payroll adds its own retention rule: keep employment-tax records for at least four years after the date the tax becomes due or is paid, whichever is later 1. This clock is separate from the three-year window on your income-tax return and it starts from the tax's due or payment date, not from when you filed a return.

That four-year bucket is broad: it covers wages paid, the amounts and dates of tax deposits, returns filed, W-4s, and the records behind income-tax withholding, Social Security, Medicare, and FUTA 5. Because payroll obligations begin the moment you make your first hire, start the retention file on day one rather than reconstructing it at year-end — the deposit dates in particular are what you will need if a notice ever questions a late payment.

Documents you keep for good

Some paperwork has no expiration because it proves a status or a cost that follows you across many years. Copies of every filed return top the list — they are the cleanest evidence that you filed, which matters most in exactly the situations (a lost return, a fraud allegation) where the limitations period never closes 1.

Keep your entity's founding documents permanently: the formation paperwork, the EIN assignment letter, and — if you elected S-corp treatment — Form 2553 and the IRS acceptance notice 6. If your S election is ever questioned years later, that acceptance is the document that settles it. Keep basis records for the life of every asset you still own, since you will need them to compute gain when you eventually sell 3. Digital copies are fine; the IRS accepts electronic records, so a well-organized folder replaces a filing cabinet.

Tax records and clinical records are two different clocks

Do not let the tax calendar decide when you shred a chart. Tax-record retention is federal and fairly uniform; clinical-record retention is set by your state's licensing board and, for some payers, by contract — and the two rarely match. A three-year tax window says nothing about how long you must hold a client's record.

Clinical retention periods vary by state and by discipline, and several are far longer than any tax rule — minors' records in particular are often held for years past the age of majority. Look up your own board's records-retention requirement and treat it as the binding floor for charts; treat the IRS rules on this page as the floor for financial documents. When a single item is both — a superbill, an EOB — keep it for whichever clock is longer.

Common questions

At least three years for the records behind a normal return, which is the usual period the IRS has to examine it. Keep six years of records if you underreported income by more than 25%, and keep records indefinitely for any year you did not file or filed a fraudulent return. Employment-tax records run four years, and asset and entity documents you keep far longer.

The six-year window applies when you omit more than 25% of the gross income you should have reported. In that case the IRS gets six years, rather than the usual three, to assess additional tax, so the supporting records need to survive that long. If you never filed or filed fraudulently, there is no limitations period at all and the records stay relevant indefinitely.

No. Employment-tax records have their own rule: keep them at least four years after the tax is due or paid, whichever is later. That clock is separate from the three-year window on your income-tax return and starts from the tax date, not the filing date. It covers wages, deposit dates and amounts, returns, and W-4s.

Yes. The IRS accepts electronic records, so scanned receipts and downloaded statements organized in a reliable folder satisfy the requirement as well as paper. Keep them backed up and readable for the full retention period, and preserve enough detail — date, amount, vendor, business purpose — that each document still substantiates the item it supports if examined years later.

No. Clinical-record retention is set by your state licensing board and sometimes by payer contract, and it is a separate, often longer clock than any tax rule. Minors' records especially are frequently held for years past the age of majority. Use your board's requirement as the floor for charts and the IRS rules only as the floor for financial documents.

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References

  1. 1.Internal Revenue Service (2026). Recordkeeping. Internal Revenue Service. link ✓IRS retention periods: generally three years, six years for a 25%+ income omission, indefinitely for unfiled or fraudulent returns, four years for employment-tax records, and asset records for the life of the asset — plus that electronic records are acceptable.
  2. 2.Internal Revenue Service (2026). Guide to business expense resources. Internal Revenue Service. link ✓That ordinary and necessary business expenses — CE, licensure fees, supervision, malpractice premiums, office costs — are deductible, so the receipts substantiating them are the records that must be retained.
  3. 3.Internal Revenue Service (2026). Publication 946, How To Depreciate Property. Internal Revenue Service. link ✓That depreciated equipment (MACRS, the Section 179 election, bonus depreciation) generates basis and depreciation records the owner must keep for the life of the asset and the limitation period after disposal.
  4. 4.Internal Revenue Service (2026). Home office deduction. Internal Revenue Service. link ✓That the home-office deduction requires regular and exclusive business use under either the simplified or actual-expense method, so a home-based practice must retain records proving that use and the method chosen.
  5. 5.Internal Revenue Service (2026). Understanding employment taxes. Internal Revenue Service. link ✓That employer payroll obligations — income-tax withholding, Social Security, Medicare, and FUTA, with their deposit dates — begin at the first W-2 hire and generate the employment-tax records subject to the four-year retention rule.
  6. 6.Internal Revenue Service (2026). About Form 2553, Election by a Small Business Corporation. Internal Revenue Service. link ✓That the S-corporation election is made on Form 2553, so the filed form and the IRS acceptance notice are permanent records that prove the election if it is later questioned.

https://www.gale.care/for-providers/irs-tax-record-retention · 6 sources. Competitor details are cited to dated public sources and maintained as they change; figures are estimates, not commitments. Synthetic demonstration.

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