Can You Deduct Sales Tax on New Home Construction?

You can claim a sales tax deduction on new home construction, but only if you itemize on Schedule A and elect to deduct state and local sales taxes instead of state and local income taxes for the year. The tax you paid on lumber, concrete, fixtures, and other building materials gets added to your everyday sales tax as a “major purchase,” and the combined figure counts toward the SALT cap along with your property taxes. Because a build can generate thousands of dollars of sales tax in a single year, the construction year is usually when this deduction is worth chasing.

Income Tax or Sales Tax, Not Both

Federal law makes you pick one each year. You can deduct state and local income taxes, or state and local general sales taxes, but never both.¹ For most people in states with an income tax, the income tax election wins in a normal year. A construction year can flip that result, because the sales tax on materials stacks on top of your ordinary sales tax spending.

If you live in a state without an income tax, the choice is already made. The sales tax election is your only route into the SALT deduction, construction year or not.

When Construction Sales Tax Qualifies

Sales tax on a home build doesn’t automatically count. The IRS recognizes three specific ways construction sales tax qualifies as a major purchase you can add to your deduction, and you only need to meet one of them.²

Your state taxes the sale of the home itself, or the total cost of a substantial addition or major renovation, at its general sales tax rate.
You bought the materials yourself and paid sales tax at the register. Owner-builders acting as their own general contractor fit here most cleanly.
Your contractor bought the materials on your behalf, and your state treats the contractor as your agent. The construction contract has to specifically authorize the builder to act in your name and follow your directions on construction decisions. When that language is in the contract, the IRS treats you as if you had bought the materials and paid the sales tax directly.

The agency path is the common one when a general contractor runs the job, and it’s also where returns run into trouble. A contract that only describes scope of work isn’t enough. The document has to grant the contractor authority to act as your purchasing agent. If your builder’s standard contract doesn’t say so, ask for the language before construction starts, not after receipts have piled up.

One limit applies across all three paths. The tax has to have been charged at the general sales tax rate for your jurisdiction. If your state imposes a special or higher rate on building materials, only the portion equal to the general rate qualifies.³

Out-of-State Materials and Use Tax

Order materials from out of state or online, and your state may charge a compensating use tax instead of sales tax. Use tax is treated the same as general sales tax for this deduction, with the same general-rate requirement.³ That matters when specialty fixtures, custom cabinetry, or engineered components ship from another state.

Mobile and Prefabricated Homes

The IRS treats mobile homes and prefabricated homes the same as conventional construction. Sales tax on the purchase of a mobile or prefab home qualifies as a major purchase, as long as it was charged at the general sales tax rate.²

The SALT Cap and the Standard Deduction

Two ceilings decide whether any of this puts money back in your pocket.

The first is the SALT cap. For 2026, the total deduction for all state and local taxes combined is capped at $40,400 for single filers and married couples filing jointly, and $20,200 for married individuals filing separately.⁴ The cap covers everything on lines 5a through 5c of Schedule A, so your property taxes and your sales-or-income tax election share the same bucket.¹ If you already pay heavy property taxes, the room left for construction sales tax is smaller than the headline number suggests.

High earners face a further reduction. The $40,400 cap begins phasing down for taxpayers with modified adjusted gross income above $505,000 ($252,500 for married filing separately), at a rate of 30 cents for every dollar above the threshold, and it cannot fall below $10,000.¹

The second ceiling is the standard deduction. Schedule A only helps you if your itemized deductions beat it. For 2026, the standard deduction is $32,200 for married couples filing jointly, $16,100 for single filers and married individuals filing separately, and $24,150 for heads of household.⁴ Construction year is when many people who normally take the standard deduction cross the line. Between SALT (sales tax plus property taxes), mortgage interest on a construction loan, and any charitable giving, the itemized total often clears the standard figure. Run it both ways before you file.

How to Calculate the Number

You have two ways to figure your total sales tax deduction.

Actual Receipts

Add up every dollar of general sales tax you paid during the year, from groceries and clothing to every construction invoice. This is the most precise method and it captures local rate variations exactly. It also requires a full year of receipt discipline, which most households don’t keep for routine spending.²

IRS Tables Plus Major Purchases

The practical route for most homebuilders is the IRS optional sales tax tables. The tables estimate your general sales tax from your income, family size, and local rates. You then add the actual sales tax you paid on specified major purchases, including materials for a new home, on top of the table amount.² This is where the construction-year math pays off: a reasonable estimate for everyday spending without tracking every coffee receipt, plus the documented construction tax layered on.

The IRS Sales Tax Deduction Calculator runs this online. You enter zip code, income, household size, and major purchases, and it returns a figure.⁵ The State and Local General Sales Tax Deduction Worksheet in the Schedule A instructions does the same job on paper. Either way, your construction sales tax goes on line 7 of that worksheet as a specified major purchase.

Whichever method you use, the result still meets the SALT cap. A calculated deduction of $25,000 is only useful to the extent it fits under $40,400 alongside your property taxes.

Reporting and Records

To claim the deduction, check box 5a on Schedule A and enter your total general sales tax on line 5a.¹ That single figure includes both your everyday sales tax (from the tables or actual receipts) and the construction major purchase amount. Property taxes sit on a separate line but count against the same cap.

Keep every construction receipt and invoice, and hold onto the signed contract that establishes any agency arrangement with your builder. The IRS asks you to retain records for at least three years from the date you file.⁶ A construction-year sales tax deduction is exactly the kind of unusually large claim that draws review, so digital copies of everything are worth the small effort now.

1
Internal Revenue Service. Topic No. 503, Deductible Taxes
2
Internal Revenue Service. Instructions for Schedule A (Form 1040)
3
Office of the Law Revision Counsel. 26 USC 164 – Taxes
4
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
5
Internal Revenue Service. Use the Sales Tax Deduction Calculator
6
Internal Revenue Service. How Long Should I Keep Records