Is buying a new roof tax deductible, or does it help you later?

How cost basis works

Your basis starts with what you paid for the home plus certain purchase costs. Capital improvements, like a new roof, an addition or new HVAC, increase it. When you sell, your gain is roughly the sale price minus selling costs minus your adjusted basis. A higher basis means a smaller gain.

When the roof actually matters at sale

Many homeowners never owe tax on a sale, because married couples can generally exclude up to $500,000 of gain, and single filers up to $250,000, if they owned and lived in the home for at least two of the five years before selling. The roof's cost becomes important when:

• The home has appreciated beyond the exclusion.
• You do not meet the ownership and use test.
• The home was a rental for part of the time.

If insurance paid for the roof

Generally, insurance reimbursements reduce basis and the cost of restoring the home increases it, so the net basis increase is roughly what you paid out of pocket, such as your deductible and upgrades. Keep the insurance estimate and payment records with the roofing invoice. See how roof replacement claims work.

Records worth keeping for as long as you own the home

• Contract, final invoice and proof of payment.
• Permit and inspection sign off if one was issued.
• Warranty documents and completion photos.

A documented recent roof also helps you sell, since buyers and their insurers ask about roof age. This is general information, not tax advice.