How long should I keep receipts for improvements to a second property?

Longer than general tax records. Because improvement costs raise the property's cost base and reduce the taxable gain when it is eventually sold, the working rule in Canada, the US and the UK is to keep those receipts for as long as you own the property, plus that country's normal record-retention period measured from the year you sell it, not the year you paid for the work.

What is the difference between a repair and an improvement for tax purposes?

A repair keeps a property in its existing condition, such as patching a roof leak or repainting a wall, and is generally not added to the cost base. An improvement adds value, extends useful life, or adapts the property to a new use, such as replacing the whole roof, adding a room, or installing a new heating system, and generally is added to the cost base. The distinction is applied case by case and the line is not always obvious, which is why the receipt and a description of the work matter as much as the amount.

What to keep for a second property, and for how long

Why these records matter

When a second property is sold, the taxable gain is calculated as the sale price minus the cost base, and the cost base is not just what was originally paid for the property. In Canada, the US and the UK alike, money spent on genuine improvements over the years of ownership is generally added to that base, which lowers the taxable gain at sale. Money spent on repairs and maintenance generally is not added, because it is treated as keeping the property in its existing condition rather than adding to its value.

The practical effect is that a renovation receipt paid for in year 3 of owning a property can still matter in year 25, when the property is sold. If the receipt, contract or proof of payment no longer exists at that point, the improvement may be difficult or impossible to claim, even though the work genuinely happened and genuinely added value. This is the single biggest reason property records need a longer retention window than ordinary annual tax paperwork.

Improvement vs. repair, with concrete examples

Tax authorities in all three countries draw a broadly similar line, though the exact wording and edge cases differ by country. The general test: an improvement adds value, extends the property's useful life, or adapts it to a new use; a repair restores something to its previous working condition without materially changing its value or lifespan.

Generally an improvement (raises cost base)	Generally a repair (does not raise cost base)
Replacing an entire roof	Patching or fixing a section of an existing roof
Adding a room, deck, garage or dock	Repainting interior or exterior walls
Installing a new heating, cooling or septic system	Servicing or repairing the existing heating or septic system
A full kitchen or bathroom renovation	Replacing a broken faucet or a cracked tile
Rewiring the property or upgrading the electrical panel	Fixing a faulty outlet or a tripped breaker
Paving a driveway that was previously gravel or dirt	Resealing or patching an existing paved driveway

Some projects mix both: replacing a damaged section of a deck with the same materials is closer to a repair, while replacing the whole deck with a larger or upgraded one is closer to an improvement. Where a project is not clearly one or the other, keeping a clear record of exactly what was done, and why, is what lets the distinction be made properly at the time the property is sold, rather than reconstructed from memory years later.

Illustrative example only: an owner who replaces a cottage's aging septic system for $18,000 in year 5 of ownership, then sells the property in year 20, would generally add that $18,000 to the cost base when calculating the gain on sale, provided the receipt and description of the work have been kept. The exact tax treatment depends on the owner's country and circumstances and is not stated here as advice.

What a receipt needs to show

A usable receipt or invoice for an improvement should show, at minimum:

The date the work was done or the item was purchased
The contractor's or supplier's name and contact details
A description specific enough to show what kind of work it was (for example, "full roof replacement, asphalt shingle" rather than just "roofing")
The amount paid, and proof it was actually paid (a bank or card statement entry, a cancelled cheque image, or a payment confirmation)
The property address, if it is not otherwise obvious from the contractor's records

A credit card or bank statement line alone is rarely enough on its own, since it typically shows only an amount and a payee name, not what the work was. Keeping the itemized invoice alongside the proof of payment is what makes the record usable years later.

Recording who did the work, warranties and photos

Beyond the receipt itself, a small amount of extra documentation makes a much stronger record and is useful well beyond tax time:

Who did the work. The contractor's business name, licence or registration details where applicable, and contact information, in case a warranty needs to be honoured or the work needs to be referenced in a future sale.
Warranties and guarantees. Any written warranty on materials or workmanship, filed with the related receipt, along with the terms and expiry.
Before and after photos. Dated photos of the area before and after the work is a simple way to show the scope of what changed, and are useful for insurance claims as well as for substantiating an improvement.
Permits, if any were required. A copy of any building or renovation permit and its final inspection sign-off, which some buyers, insurers or tax authorities may ask to see.

How long to keep records: Canada, US, UK

Each of the three countries below sets a general retention period for tax records, and a longer, property-specific rule for records that establish cost base. These are the general rules; specific situations (an ongoing audit or enquiry, a filed loss, unreported income) can extend them, and confirming the current rule with the tax authority or a local professional before discarding anything is the safer approach.

Country	General record retention	Property basis / improvement records
Canada	The CRA states records and supporting documents should generally be kept for six years from the end of the last tax year they relate to.	Because the six-year clock runs from the tax year a record relates to, and a capital gain on a property is reported in the year it is sold, the practical result is that improvement records need to be kept for as long as the property is owned, plus six years after the year of sale.
United States	The IRS's general rule is three years from when a return was filed, for most income tax records.	The IRS is explicit that records relating to property should be kept until the period of limitations expires for the year the property is disposed of, since they are needed to figure the basis for gain or loss on sale. In practice this means keeping purchase and improvement records for as long as the property is owned, plus the applicable limitations period (generally three years, longer in specific situations such as understated income) after the year it is sold.
United Kingdom	HMRC's general Self Assessment rule is 22 months after the end of the tax year, for someone with no business or rental income to report.	For anyone self-employed, in a partnership, or with income such as UK rental property to report (which covers most owners letting out a second property), HMRC's rule is at least five years after the 31 January Self Assessment deadline for that tax year. As with Canada and the US, capital gains records on a property held for personal or investment use are generally kept for as long as the property is owned, plus the applicable period after the tax year of sale.

These figures were checked against gov.uk, canada.ca and irs.gov guidance on 15 September 2026; see the Sources section below. Retention rules can change, and a country's tax authority is the definitive source at the time records are actually needed.

Insurance inventories, rental records and handover notes

A second property's paperwork is useful for more than tax reporting. Three other categories are worth keeping alongside the improvement records above:

Insurance inventories. A dated list, with photos, of the contents and condition of the property, updated after any major purchase or renovation. This speeds up a claim after damage or theft and gives an insurer a clear before-and-after if a dispute arises.
Rental records. For an owner who rents the property out, even occasionally, records of rental income received, expenses paid, and the dates the property was rented versus used personally. Several countries' tax rules (including personal-use limits in Canada, the US and the UK) depend on how many days a property was rented versus used by the owner, so a simple dated log matters as much as the receipts themselves.
Handover notes for renters or family. A short document covering how systems work (heating, septic, well, alarm), where shut-off valves are, who the local contractors are, and any house rules. This is not a tax record, but it is the kind of document that turns into a real time-saver the first time something goes wrong while the owner is away.

Practical checklist

A simple, ongoing record for a second property, built up over the years of ownership, covers:

Purchase documents: the closing statement, deed or title, and purchase price
Every improvement receipt, with date, contractor, description and proof of payment
Before and after photos for each improvement
Warranties and permits related to any renovation work
An insurance inventory, updated after major changes
Rental income and expense records, and a log of rental versus personal-use days, if the property is ever rented
A handover note for anyone else who stays at or manages the property

Kept as one running record from the day a property is bought, this is a fraction of the effort it takes to reconstruct the same information from memory and old inboxes the year the property is sold.

Work out your own numbers

Common questions

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

Repair receipts are still worth keeping for a shorter period, generally the country's standard retention window from the year the repair was paid for, since they may be relevant to a rental-expense deduction in the year they were incurred. They are less often relevant to the property's cost base at sale, which is the reason improvement records need the much longer retention window described above.

What if I have lost a receipt for an old improvement?

Some tax authorities will accept secondary evidence, such as a bank statement, a contractor's own records, or a permit filing, though the strength of that evidence varies and is assessed case by case. This is exactly the situation the retention practice above is meant to prevent; a local tax professional can advise on what alternative evidence might be accepted in a specific case.

Do these retention periods apply to a property used partly as a rental?

Renting out a second property, even part-time, generally brings in additional record-keeping obligations, such as the five-year UK Self Assessment period for anyone with rental income noted above. Rental status can also affect which retention period applies and what other records (occupancy logs, expense receipts) are needed, so a property with any rental history should generally follow the longer, business or rental-relevant retention rule for that country.

Should digital copies of receipts be kept, or only originals?

All three tax authorities generally accept digital copies of records, including scans or photos of paper receipts, provided they are a complete and legible copy of the original. Keeping a backed-up digital copy in addition to, or instead of, a fading paper receipt is a reasonable way to make sure a record is still usable decades later.

Sources

Canada Revenue Agency, "Keeping Records", checked 15 September 2026.
IRS, Topic no. 305, Recordkeeping, checked 15 September 2026.
IRS, "How long should I keep records?", checked 15 September 2026.
gov.uk, "Business records if you're self-employed: how long to keep your records", checked 15 September 2026.
gov.uk / HMRC, "Self Assessment: guide to keeping records", checked 15 September 2026.

Last reviewed 15 September 2026. Next review 15 March 2027. Written by the OwnersLog team from the official sources listed above. No professional reviewer is named on this page yet.

This guide is general information about how property record-keeping and cost-base rules commonly work, not financial, tax, legal or mortgage advice, and it cannot account for your circumstances or your country's current rules. Confirm anything that matters with a qualified local professional. See the full disclaimer.