How Long to Keep Home Improvement Records for Taxes

TL;DR: Keep every home improvement receipt, contract, and permit for as long as you own the house, then for at least 3 years after you sell and file that year's return. These records raise your cost basis, which lowers the taxable gain when you sell, especially important if your profit could exceed the $250,000 (single) or $500,000 (married) IRS exclusion.

_Last reviewed: August 2026 · 7 min read_

You spent $18,000 on a new roof in 2019 and have no idea where the invoice went. If you sell the house in ten years and the IRS asks you to prove your cost basis, that missing paperwork could cost you thousands in avoidable capital gains tax.

Okoniq Property Hub logs your repairs and improvements with dates, dollar amounts, and photos as you go, so you're never digging through old email at closing.

How long do I actually need to keep these records?

The rule is simple: keep improvement records for the entire time you own the home, plus 3 years after you file the tax return for the year you sell it. The IRS generally has 3 years from the filing date to audit a return, so that's your minimum safety window. If you underreport gross income by more than 25%, the audit window stretches to 6 years, which is another reason to hold onto documentation longer than feels necessary.

This is different from routine repair receipts (a $150 plumbing fix, a filter change) which don't affect your taxes at all. Improvements are the ones that count — anything that adds value, extends the home's life, or adapts it to new uses. A new roof, a kitchen remodel, a finished basement, an added bathroom, or repointed brick all qualify. A one-time gutter cleaning does not.

Why does the IRS care about improvement records at all?

Because improvements increase your home's cost basis, and a higher basis means less taxable profit when you sell. Your cost basis starts with what you paid for the house, then every qualifying improvement gets added to it over the years. Sell the house and the IRS taxes you on the difference between your sale price and your adjusted basis, not the original purchase price.

Say you bought a home for $280,000 and put $65,000 into improvements over 15 years, including a new $18,000 roof and a $22,000 kitchen remodel. Your adjusted basis is now $345,000. If you sell for $520,000, your taxable gain drops from $240,000 to $175,000 before any exclusion is applied. Without the paper trail, the IRS assumes your basis is just the purchase price, and you pay tax on money you never actually gained. A driveway heaving repair or foundation crack fix can count the same way if the work restores or extends the structure rather than just patching a cosmetic issue.

What counts as an improvement versus a repair?

An improvement adds value or extends useful life; a repair just maintains what's already there. The IRS draws this line consistently, and it matters because only improvements adjust your basis.

| Improvement (adds to basis) | Repair (does not) | |---|---| | New roof, $15,000–$25,000 | Patching a roof leak | | Kitchen remodel with new cabinets | Fixing a cabinet hinge | | New HVAC system | Annual furnace tune-up | | Finished basement or added room | Repainting a bedroom | | New siding | Caulking or spot-repairing siding |

Some projects blur the line. Replacing 3 damaged shingles is a repair. Replacing the entire roof, even if it was aging faster than expected due to poor ventilation, is a capital improvement. Keep the contractor's scope of work in writing so there's no ambiguity years later.

What documents should I actually save for each project?

Save the invoice, the contract, proof of payment, and any permit or inspection paperwork for every qualifying improvement. Four pieces of documentation cover almost every scenario an auditor or a title company might ask about:

• Itemized invoice or contract showing what work was done and the total cost
• Proof of payment — cancelled check, credit card statement, or bank transfer record
• Permits and final inspection sign-offs, especially for electrical, plumbing, or structural work
• Before-and-after photos, which help if you ever need to argue that work was a capital improvement rather than routine maintenance

Store digital copies in at least two places, a cloud folder and a physical backup, since a 15-year-old email account or a defunct contractor's website won't help you at closing. If you ever upgraded from 2-prong outlets or added a subpanel for 200-amp service, that permit paperwork alone can be worth thousands in basis adjustment.

What if I've already lost some of my old receipts?

You can often reconstruct records using secondary evidence, but it's harder and less reliable than saving originals. Bank and credit card statements going back several years, contractor invoices requested directly from the company, permit records pulled from your county's building department, and even before-and-after photos with timestamps can help rebuild a paper trail. County permit offices typically keep records indefinitely, so a $30 records request can recover documentation for a $20,000 addition you can no longer find receipts for.

Going forward, the fix is simple: log the project the week it's finished, while the contractor's name, cost, and paperwork are still easy to find.

FAQ

Do I need to keep records for repairs, or just improvements?

Only improvements affect your taxes, since they adjust your cost basis. Routine repairs like fixing a leak or repainting a room don't need to be kept for IRS purposes, though many owners track them anyway for warranty or resale conversation purposes.

What happens if I can't prove an improvement when I sell?

The IRS will use your original purchase price as your basis, ignoring any improvements you can't document, which usually means paying capital gains tax on money that isn't really profit. There's no penalty for the missing records themselves, just a higher tax bill.

Does the $250,000/$500,000 home sale exclusion mean I don't need records at all?

Not necessarily. If your gain, sale price minus adjusted basis, comes in under $250,000 for a single filer or $500,000 for a married couple filing jointly, you may owe nothing regardless of records. But home values have risen enough in many markets that owners who've held property 15-20 years can exceed that exclusion, making basis documentation the only way to reduce the taxable amount.

Are landlords' rental property improvement records treated the same way?

Rental properties follow similar basis rules but add depreciation into the mix, since you deduct depreciation annually and must recapture it at sale. Landlords should keep the same improvement documentation plus annual depreciation schedules for as long as they own the property and for years after selling.

Should I keep records for improvements I made decades ago on a home I still own?

Yes. If you still own the home, every qualifying improvement from any year still adds to your current basis and should be kept until you sell plus 3 years after.

This is educational information, not tax advice. Talk to a CPA or tax professional about your specific cost basis calculation and recordkeeping requirements before you file.