Capital improvement

A significant upgrade that adds value or extends the life of the property: a new roof, a room addition, a full kitchen remodel. Added to cost basis rather than deducted in one year.

Investment terms · Updated September 2026

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Part 1 of 4

Why a seller cares

Improvements add to your basis and lower the taxable gain, which is why the receipts for a roof, an addition or a kitchen matter at sale. Repairs do not count; the line between them is the tax code's, not yours.

Part 2 of 4

A simple example

Over twelve years you replaced the roof, added a deck and remodeled the kitchen for $48,000 total. Your basis rises by $48,000.

Capital improvement: a simple example
The spendingIs it a capital improvement?
A new roof, $14,000Yes; adds to basis
A kitchen remodel, $28,000Yes
Repainting and a furnace repairNo; repairs and upkeep

Improvements raise the basis. Keeping the receipts is what makes them count.

Part 3 of 4

What people get wrong

That everything spent on the house lowers the gain. Only improvements do; maintenance is the cost of living there.

Part 4 of 4 · where to read next

Where it appears in the sale

What a definition is, and what it isn't

Keighbor is a software company, not a law firm, brokerage, or tax adviser. This is general information, not legal, tax, financial, or real estate advice about your sale. Your situation may differ. Before acting on a contract, disclosure, title, tax, or pricing question, ask an appropriately licensed professional in your state.

Written and researched by Keighbor Research · drawn from the reference glossary · how we research and check what we publish

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