The SALT deduction gives taxpayers who itemize a choice: deduct either state and local income taxes or state and local sales taxes on their federal return. For residents of states with no income tax, such as Texas, Florida, Washington, and Nevada, the sales tax option can put hundreds or even thousands of dollars back in their pockets. Understanding how this deduction works, who qualifies, and how to calculate it is essential to getting the most from your tax return.
What is the SALT deduction?
The SALT deduction allows individual taxpayers to deduct certain state and local taxes they paid during the year as an itemized deduction on their federal income tax return. “SALT” stands for state and local taxes, and the deduction covers property taxes, income taxes, and, critically, sales taxes. You cannot deduct both income taxes and sales taxes; you must choose one or the other. That choice is what makes the sales tax deduction a powerful planning tool for taxpayers in the right circumstances.
Congress originally introduced the option to deduct sales taxes in lieu of income taxes as a temporary provision. The Protecting Americans from Tax Hikes Act of 2015 (PATH Act) made this break permanent, eliminating the year-to-year uncertainty that taxpayers had faced. Since then, the sales tax deduction has remained a stable part of the tax code, though the overall SALT deduction cap introduced by the Tax Cuts and Jobs Act (TCJA) in 2018 has significantly affected how much taxpayers can claim. The IRS explains the current rules for deductible taxes in its Topic No. 503 guidance.
How the SALT deduction cap affects your savings
The TCJA originally placed a $10,000 cap on the total SALT deduction ($5,000 for married taxpayers filing separately). The One Big Beautiful Bill Act, enacted in July 2025, raised that cap substantially. For the 2025 tax year, the limit is $40,000 ($20,000 for married taxpayers filing separately), and the cap and income threshold are scheduled to increase by 1 percent each year through 2029 before reverting to $10,000 in 2030. This means that whether you choose to deduct income taxes or sales taxes, your combined state and local tax deduction, including property taxes, cannot exceed the cap in effect for the year. Before any cap existed, high-tax-state residents routinely deducted far larger amounts. The SALT deduction cap remains one of the most debated provisions in federal tax law.
The higher cap is not available to everyone. The $40,000 deduction begins to phase down for taxpayers with modified adjusted gross income above $500,000 ($250,000 for married filing separately), reduced at a rate of 30 percent of the income above that threshold. The deduction never falls below the $10,000 floor, so even high earners retain at least that amount. For taxpayers whose property taxes alone approach the limit, the choice between income tax and sales tax deductions may seem less impactful. If your property taxes are modest, however, the sales tax deduction can still provide meaningful savings, particularly if you made large purchases during the year. The key is running the numbers both ways before you file, and a tax advisory professional can confirm which path leaves more money in your pocket.
Who benefits most from deducting sales tax?
Deducting state and local sales taxes instead of income taxes makes the most sense in several specific situations. Residents of states with no state income tax are the most obvious beneficiaries, because they have no income tax to deduct in the first place. Their only option for this portion of the SALT deduction is the sales tax route.
Beyond no-income-tax states, you may also benefit if you purchased a major item during the year, such as a vehicle, boat, or significant home improvement materials, that generated substantial sales tax. The IRS allows you to add the actual sales tax paid on these large purchases to the amount calculated through its standard tables, boosting your total deduction. Taxpayers who paid a low effective state income tax rate but live in a state with a high sales tax rate can also come out ahead by comparing both options.
How to calculate your sales tax deduction with the IRS sales tax calculator
One of the most common concerns about the sales tax deduction is record-keeping. You do not need to save every receipt from the year to claim this deduction. The IRS provides a Sales Tax Deduction Calculator that estimates your deduction based on your filing status, number of dependents, adjusted gross income, state of residence, and local sales tax rates.
The calculator produces a standard amount based on IRS tables. You can then add actual sales tax paid on qualifying major purchases, such as cars, boats, aircraft, homes, and substantial home renovations, on top of the table amount. This hybrid approach gives you the benefit of the standard estimate plus a boost for any big-ticket items. If you prefer, you can also deduct actual sales taxes paid during the year instead of using the tables, but that requires detailed records of every taxable purchase.
Sales tax deduction vs. income tax deduction: how to decide
Choosing between the sales tax deduction and the income tax deduction requires a straightforward comparison. Calculate your total state and local income taxes paid during the year, then use the IRS sales tax calculator to estimate your sales tax deduction, including any major purchases. Whichever figure is higher is the one you should claim, subject to the overall SALT deduction cap.
This is an annual decision, so you are not locked into the same choice every year. If you bought a car this year, the sales tax deduction might win out. Next year, with no large purchases, the income tax deduction might be higher. Reviewing both options each filing season is a simple step that can yield real savings.
A few additional nuances are worth tracking. State and local general sales taxes are deductible, but selective sales taxes, also called excise taxes, on specific goods like alcohol, tobacco, or gasoline generally are not deductible under this provision. Also, if you received a state or local income tax refund, taking the sales tax deduction in the prior year means you may not need to report that refund as income, which can create an additional tax benefit.
Steps to claim the sales tax deduction on your return
The sales tax deduction is an itemized deduction, which means you must file Schedule A with your federal return. Here is how the process works:
1. Determine whether your total itemized deductions exceed the standard deduction. If they do not, the standard deduction will give you a larger benefit regardless.
2. Visit the IRS sales tax calculator and enter your information to get your estimated deduction amount.
3. Add actual sales tax paid on qualifying major purchases to the calculator result.
4. Compare the total to your state and local income taxes paid.
5. Enter the higher amount on Schedule A, Line 5a, and check the box on that line to indicate whether you are deducting income taxes or general sales taxes.
6. Ensure your total SALT deduction (including property taxes on Line 5b) does not exceed the cap in effect for the year, which is $40,000 for most filers in 2025.
You can review the line-by-line mechanics directly in the IRS Instructions for Schedule A. Taxpayers who are unsure which option produces better results should work with a CPA or tax advisor who can model both scenarios and identify the approach that minimizes total tax liability.
What could change with the SALT deduction going forward
The SALT deduction cap has been a major point of contention since its introduction. After years of debate, the One Big Beautiful Bill Act raised the cap to $40,000 for 2025, but that increase is temporary: under current law, the cap is scheduled to drop back to $10,000 in 2030 unless Congress acts again. Any future change to the cap would directly affect the value of both the income tax and sales tax deduction options for itemizers, so this remains an area to watch.
Some states have also enacted pass-through entity tax (PTET) elections that allow business owners to effectively work around the SALT cap by paying state taxes at the entity level rather than the individual level. If you own a pass-through business, this approach may reduce your individual SALT burden and change the calculus of whether to deduct income taxes or sales taxes on your personal return.
Staying informed about legislative developments matters, because the rules governing this deduction can shift with each new tax law. Pairing year-round planning with the right accounting services ensures you are positioned to take full advantage of whatever provisions are in effect for the current tax year.
Frequently Asked Questions
Can you deduct sales tax if you live in a state with income tax?
Yes, you can deduct state and local sales taxes even if your state imposes an income tax. You must choose one or the other, however, because you cannot deduct both. Compare your total income taxes paid to your estimated sales tax deduction and claim whichever is higher.
How does the SALT deduction cap work?
The SALT deduction cap limits the total amount of state and local taxes you can deduct on your federal return. For the 2025 tax year, the One Big Beautiful Bill Act raised the cap to $40,000 ($20,000 if married filing separately), with a phase-down for taxpayers whose modified adjusted gross income exceeds $500,000. The cap is scheduled to revert to $10,000 in 2030. This cap includes property taxes plus either income taxes or sales taxes, whichever you choose to deduct.
Do I need to save all my receipts to deduct sales tax?
No. The IRS provides a sales tax calculator that estimates your deduction based on your income, filing status, and location. You only need receipts for major purchases, such as vehicles or boats, that you want to add on top of the standard table amount.
Is the sales tax deduction better if I bought a car this year?
Often, yes. The actual sales tax paid on a vehicle can be added to the IRS table amount, which may push your total sales tax deduction above your state income tax amount. That makes the sales tax option especially valuable in years with large purchases.
What is the difference between general sales tax and excise tax for deduction purposes?
General sales taxes, the broad tax applied to most retail purchases, are deductible under the SALT deduction. Excise taxes on specific items like gasoline, alcohol, or tobacco are generally not deductible as part of the sales tax deduction, even though they may be included in the price you pay.
Should I choose the sales tax deduction or income tax deduction?
Run the numbers both ways each year. Use the IRS sales tax calculator to estimate your sales tax deduction, then compare it to your total state and local income taxes paid. Claim whichever produces the larger deduction, keeping the SALT cap for the year in mind, which is $40,000 for most filers in 2025.
