Tax Treatment of Closing Costs: Deductions vs. Basis Additions

The tax treatment of closing costs splits every line on your settlement statement into three buckets: a short list you can deduct the year you buy (mortgage interest, real estate taxes, discount points, and mortgage insurance premiums), a longer list that gets added to your property’s cost basis and reduces your taxable gain when you sell, and a handful of charges that give you no tax benefit at all. Which bucket a fee lands in is fixed by IRS rules, not by how the closing agent labels it.

You Have to Itemize for Any of the Deductions to Matter

Every purchase-year deduction below sits on Schedule A. If your itemized total doesn’t beat the standard deduction, none of these deductions changes your tax bill. For 2026, the standard deduction is $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for heads of household.¹ Many first-time buyers with modest mortgages sit below those thresholds, which makes the basis side of the analysis the more valuable tax lever.

Property taxes paid at closing also feed into the state and local tax cap. For 2026, the SALT cap is $40,000 for single and joint filers, phasing down for modified adjusted gross income above $500,000 and returning to $10,000 once income reaches $600,000. Married filing separately gets half those amounts. If your state income tax already puts you at the cap, the property tax portion of your closing costs may not produce any additional deduction.

Closing Costs You Can Deduct in the Purchase Year

Four kinds of charges are deductible on Schedule A the year you close.

Prepaid Mortgage Interest

Your settlement statement will show interim or prepaid interest covering the days from closing through month-end. That’s ordinary mortgage interest under Section 163, deductible the same as your monthly payments.² It shows up on the Form 1098 your lender mails in January.

Real Estate Taxes

You can deduct property taxes at closing, but only the portion allocable to the days you actually owned the home. The tax year gets apportioned between buyer and seller by ownership period, regardless of who cuts the check.³ Money you drop into an escrow account is not yet a deduction. You deduct the tax when the escrow agent actually remits it to the taxing authority.

Discount Points

Points, sometimes labeled discount points or loan origination fees, are prepaid interest. One point equals 1% of the loan. On a primary residence purchase, you can deduct the full amount in the year of closing if the points are figured as a percentage of the loan, the charge matches standard practice in your area, the amount appears clearly on the settlement statement, and you bring enough of your own money to closing to cover them.⁴

If the seller pays the points for you, you can still deduct them as if you paid them, but you must reduce the home’s basis by the same amount.⁵ Net effect over the life of ownership is usually a wash.

Mortgage Insurance Premiums

If your down payment came in under 20%, you’re probably paying private mortgage insurance or a government mortgage insurance premium. Beginning with tax year 2026, the federal deduction for these premiums is permanent. It phases out as adjusted gross income climbs above $100,000 ($50,000 if married filing separately) and disappears at $109,000.⁶ An upfront premium paid at closing follows the same phase-out.

Closing Costs That Get Added to Your Basis

Most fees on your Closing Disclosure produce no deduction the year you buy. They attach to your basis, the starting figure the IRS uses when you eventually sell. A higher basis means a smaller taxable gain.

IRS Publication 551 lists the settlement fees and closing costs that add to basis:⁵

Abstract of title fees and owner’s title insurance.
Legal fees, including title search, sales contract preparation, and deed preparation.
Recording fees for the deed and mortgage.
Survey fees.
State or local transfer and stamp taxes on the change of ownership.
Utility service installation charges.
Seller obligations you agree to pay, such as back taxes, interest, recording fees, or repair costs.

These are treated as part of what you paid to acquire the property, not as expenses or interest. Nothing happens on your current year return. The payoff arrives at sale.

How Basis Actually Changes Your Tax Bill

Gain on a home sale is the amount realized minus your adjusted basis. Adjusted basis starts at the purchase price, adds the capitalized closing costs above, and adds any capital improvements you make while you own the property, such as a new roof, a kitchen remodel, or added square footage.⁷ Routine maintenance doesn’t count.

Section 121 will absorb the gain entirely for many sellers. If you owned and lived in the home as your principal residence for at least two of the five years before sale, you can exclude up to $250,000 of gain from income, or up to $500,000 if you’re married filing jointly and both spouses meet the use test.⁸ The exclusion is available once every two years.

In high-appreciation markets, though, gain above $250,000 or $500,000 is fully taxable as capital gains. Say a couple bought at $400,000, capitalized $25,000 in closing costs, and later put in $60,000 of improvements. Adjusted basis: $485,000. Sale at $1,050,000 produces a gain of $565,000. After the $500,000 exclusion, $65,000 is taxable. Without the basis additions, taxable gain would have been $85,000 higher. At a 15% long-term capital gains rate, that’s about $12,750 in extra tax the closing statement quietly saved them.

Closing Costs That Give You Nothing

Some line items at closing are neither deductible nor added to basis. Publication 551 excludes:⁵

Casualty insurance premiums, including homeowner’s, fire, flood, and hazard insurance.
Loan-related charges such as lender-required appraisal fees, credit report fees, and loan assumption fees.
Rent or utility charges for occupying the property before closing.

The IRS draws a line between the cost of getting the loan and the cost of getting the property. The loan-processing fees sit on the wrong side of that line.

If You’re the Seller

Sellers don’t add closing costs to basis because they aren’t acquiring anything. Selling expenses instead reduce the amount realized, which cuts taxable gain directly. Publication 523 lists what you can subtract from your sale price:⁷

Real estate agent commissions
Advertising fees
Legal fees connected to the sale
Transfer taxes, stamp taxes, and similar fees paid by the seller
Points or loan charges you paid that would normally have been the buyer’s responsibility

Agent commissions are usually the largest single selling cost, and subtracting them before running the gain calculation can be what keeps a sale inside the Section 121 exclusion.

Rental Properties and Refinances Work Differently

If the property is a rental rather than your home, the deductible/basis split still applies, but the basis additions don’t just wait for a sale. They fold into the depreciable basis of the building and come back to you through annual depreciation deductions. Residential rental property is depreciated over 27.5 years under MACRS, and title insurance, legal fees, recording fees, surveys, and transfer taxes are recovered over that period.⁹¹⁰ Land isn’t depreciable, so you have to separate land value from building value first. Points on a rental purchase can’t be deducted in full at closing; they’re amortized over the loan term.⁴

Points on a refinance follow the same amortization rule even on a primary residence. Under Section 461(g), prepaid interest is spread over the period it covers, so refinance points come off over the full new loan term: one-thirtieth per year on a 30-year loan, one-fifteenth on a 15-year.¹¹ If part of the refinanced proceeds pays for substantial home improvements, the portion of points tied to that piece can be deducted in full the year of the refinance. Other refinance charges (appraisal, credit report) do not adjust basis and are not deductible; they fall into the no-benefit bucket.

Records to Keep

Your Closing Disclosure, or for older transactions the HUD-1 Settlement Statement, is the document that drives all of this. It shows each fee, tax, and interest charge line by line, and it’s what you’ll use at tax time to sort deductions from basis additions.

Hold the closing paperwork for as long as you own the property, plus the limitations period after you file the return for the year of sale. The IRS’s own guidance is to keep property records “until the period of limitations expires for the year in which you dispose of the property.”¹² The general period is three years; six if income is understated by more than 25%. Keeping records for seven years after the sale gives you room.

Do the same for capital improvements. Every documented improvement lifts your adjusted basis; every undocumented one is money you can’t claim. A running spreadsheet with date, description, and cost, kept alongside your closing statement, is worth more than the effort it takes.

1
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
2
eCFR. 26 CFR 1.163-1 – Interest Deduction in General
3
eCFR. 26 CFR 1.164-6 – Apportionment of Taxes on Real Property Between Seller and Purchaser
4
Internal Revenue Service. Topic No. 504, Home Mortgage Points
5
Internal Revenue Service. Publication 551 (12/2025), Basis of Assets
6
Office of the Law Revision Counsel. 26 USC 163 – Interest
7
Internal Revenue Service. Publication 523 (2025), Selling Your Home
8
Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain From Sale of Principal Residence
9
Internal Revenue Service. Publication 527 (2025), Residential Rental Property
10
Internal Revenue Service. Rental Expenses
11
Office of the Law Revision Counsel. 26 USC 461 – General Rule for Taxable Year of Deduction
12
Internal Revenue Service. How Long Should I Keep Records?