Everyone is talking about the One Big Beautiful Bill.
Most of the conversation has been about income tax rates, tips, overtime, and Medicaid. But buried inside the bill is a change that directly affects how much your state and local sales tax matters on your federal return — and almost nobody is talking about it.
The One Big Beautiful Bill Act raised the cap on the state and local tax deduction from $10,000 to $40,000 for taxpayers making $500,000 or less in modified adjusted gross income for 2025.
For 2026, the cap increases further to $40,400 for taxpayers making $505,000 or less.
For millions of Americans who itemize their federal tax returns, that's a massive change — and sales tax is directly in the middle of it.
The state and local tax deduction — SALT — allows taxpayers who itemize their federal returns to deduct certain state and local taxes they've already paid. Before 2017, there was no cap. The Tax Cuts and Jobs Act introduced a $10,000 cap, which dramatically reduced the value of the deduction for taxpayers in high-tax states.
The One Big Beautiful Bill raised that cap to $40,000.
Here's what most people miss: the SALT deduction isn't just for property taxes and income taxes. Itemizing taxpayers will be able to deduct up to $40,000 in local property taxes and either state and local income taxes or sales taxes already paid. 95.3 MNC
It's an either/or choice on the income tax versus sales tax side. Taxpayers can deduct their state income taxes — or they can deduct their state and local sales taxes. Not both.
For residents of states with no income tax — Texas, Florida, Washington, Nevada, Tennessee, Wyoming, South Dakota, Alaska, and New Hampshire — that choice is easy. There's no state income tax to deduct. Sales tax is all they have.
The $10,000 SALT cap made the sales tax deduction largely irrelevant for most taxpayers. If your property taxes alone ate up most of the $10,000 cap, there was nothing left for sales taxes. The math didn't work.
At $40,000, the math works again.
The concentration of SALT deduction benefits has shifted to higher earners in states that lack income taxes or have filers claiming sales tax deductions on large one-time purchases — vehicles, properties, or major renovations — which increases the value of the deduction significantly.
Think about what that means in practice. A Texas family that bought a new car, did a major home renovation, and purchased significant appliances in 2025 may have paid thousands of dollars in sales tax on those transactions. Under the old $10,000 cap, they probably couldn't deduct any of it — their property taxes used up the cap. Under the new $40,000 cap, those sales tax payments become deductible — potentially generating a meaningful federal tax reduction.
There are two ways to calculate the sales tax deduction for federal purposes:
Option 1: Actual sales taxes paid. Keep every receipt. Add up every dollar of sales tax you paid during the year. Deduct that amount — subject to the $40,000 SALT cap combined with property taxes.
Option 2: IRS optional sales tax tables. The IRS publishes optional tables that calculate an estimated sales tax deduction based on your income, filing status, state, and number of exemptions — without requiring you to track receipts. You can then add actual sales tax paid on major purchases (vehicles, boats, aircraft, homes, and home building materials) on top of the table amount.
For most taxpayers, Option 2 is simpler. For taxpayers who made large purchases in 2025 or 2026, Option 1 — or Option 2 plus actual receipts for major purchases — may yield a larger deduction.
Not every taxpayer benefits equally. The SALT cap increase is most valuable for specific groups.
Residents of no-income-tax states. The SALT deduction benefit is concentrated in higher earners in states which lack income taxes — filers who claim sales tax deductions rather than income tax deductions, especially on large one-time purchases like vehicles, properties, or renovations. With the cap at $40,000, high-spending taxpayers in Texas, Florida, and Washington have a meaningful new deduction available. Fox 59
High earners in high-tax states. Prior analysis showed that a large concentration of SALT deduction benefits went to taxpayers in California, Connecticut, Maryland, and New York — states that remain among those benefiting most from the increased limit. For these taxpayers, the higher cap restores a deduction that was severely curtailed since 2017.
Taxpayers who made major purchases. The sales tax on a $50,000 vehicle, a $30,000 home renovation, or a major appliance purchase can be substantial. At the old $10,000 cap, that sales tax was rarely fully deductible. At $40,000, it often is.
Middle and upper-middle income households. The cap phases out for taxpayers with MAGI greater than the income threshold — reduced by 30% of the excess until it reverts to $10,000. The full cap is available for incomes up to $500,000 in 2025 and $505,000 in 2026. This means the deduction is broadly available across middle and upper-middle income brackets. 95.3 MNC
This change isn't permanent — and that matters for planning.
From 2026 to 2029, both the cap and income threshold increase by 1% annually. In 2030, the SALT cap reverts entirely to $10,000.
That reversion creates a 2030 cliff that is already generating significant political controversy. The $10,000 cap was one of the most politically contentious parts of the original Tax Cuts and Jobs Act — particularly for taxpayers in high-tax states. The $40,000 cap raises it for five years, then drops it back. Expect another major congressional fight over SALT in 2029.
For taxpayers making timing decisions about large purchases — vehicles, major renovations, significant equipment — the 2026-2029 window is the most favorable environment for sales tax deductibility in nearly a decade.
The SALT cap increase doesn't just affect federal returns — it has downstream effects on state budgets and behavior that the sales tax world is still processing.
States that have used high income taxes to fund government are watching closely. When the federal SALT deduction was capped at $10,000, the effective cost of living in a high-tax state went up — because taxpayers couldn't offset as much of their state tax burden against federal liability. With the cap at $40,000, that dynamic shifts.
States like Missouri that are currently debating eliminating their income tax and replacing it with an expanded sales tax are watching the SALT changes carefully. If residents of no-income-tax states are now getting significantly more federal tax relief through the sales tax deduction, the argument for switching from income to consumption taxation gets more financially attractive for certain taxpayer segments. Fox 59
The OBBBA's state conformity implications are complex — states that begin income tax calculations with federal taxable income may automatically inherit some OBBBA provisions, while others will need to explicitly conform or decouple. Those decisions are playing out in state legislatures right now. Fox 59
Here's a practical reality: the sales tax deduction is one of the most consistently overlooked tax benefits available to itemizing taxpayers.
Even before the SALT cap increase, taxpayers in no-income-tax states who itemized could deduct their sales taxes. Many never did — either because they didn't track receipts, didn't know the IRS optional tables existed, or assumed the deduction wasn't worth calculating.
At $40,000, that calculation has changed. IRS data show that while overall state and local sales tax deduction claims fell from 2017 to 2022 after the TCJA cap was introduced, the benefit shifted to primarily households earning more than $100,000 per year. The OBBBA broadens the pool of taxpayers for whom the math works again. Fox 59
If you itemize and live in a no-income-tax state — or if you made significant purchases in 2025 or 2026 — this deduction is worth revisiting with your tax professional before your next return.
The OBBBA's SALT changes also have implications for how businesses think about state tax strategy.
Businesses that pay significant state and local taxes — including sales taxes — as part of their operations need to understand how the new federal treatment affects their overall tax position. Pass-through entities, sole proprietors, and self-employed individuals whose personal returns reflect business sales tax payments may see material changes in their federal liability under the new cap structure.
The interplay between the OBBBA's individual provisions and business tax obligations is genuinely complex — and the guidance from state revenue departments on how to handle OBBBA conformity is still evolving in many states.
Have questions about how the One Big Beautiful Bill's SALT changes affect your sales tax deductibility — or how state conformity decisions might change your compliance obligations? Book a free consultation with our team at sales.tax. We'll walk through what the OBBBA means for your specific situation and make sure you're capturing every deduction available.