SALT Cap 2026: How the SALT Deduction Income Limit Works Under the Big Beautiful Tax Act

The SALT cap limits how much of your state and local taxes you can deduct on your federal return. If you own a home in Connecticut or New York, or you run a business that passes its income through to your personal return, this one number can change your tax bill more than almost anything else on the form.

This post explains what the SALT cap is, how the Big Beautiful Tax Act changed it, how the salt deduction income limit works, and what you can actually do about it.

What Is the SALT Cap?

SALT stands for state and local taxes. The SALT deduction lets taxpayers who itemize reduce their federal taxable income by what they paid in state and local taxes. The SALT cap — sometimes called the SALT tax cap — is the ceiling on that deduction.

The deduction itself is old. It has been part of the federal tax code since the modern income tax began, following the ratification of the Sixteenth Amendment in 1913. For most of that century, taxpayers who itemized could deduct the full amount of state and local taxes they paid.

How We Got the $10,000 Cap

Before 2018, itemizers could deduct property taxes plus either state income taxes or sales taxes — whichever gave the greater benefit. That was especially valuable in states with higher tax burdens.

The Tax Cuts and Jobs Act (TCJA), signed into law in December 2017, changed that. It capped the SALT deduction at $10,000 ($5,000 for married individuals filing separately). The cap applies to the combined total of:

• State and local real property taxes
• State and local personal property taxes
• State and local income taxes (or sales taxes, if elected instead)

The cap took effect for tax years beginning after December 31, 2017, and was originally set to expire before January 1, 2026. It was not indexed for inflation, so its real value shrank a little every year.

What the Big Beautiful Tax Act Changed

The One Big Beautiful Bill Act, enacted as 119 P.L. 21, made three significant changes to the SALT cap:

• Increased cap amounts based on filing status
• Indexing for inflation in future years
• An extended timeline for the modified caps

The original TCJA cap held everyone to the same $10,000 limit regardless of filing status. The new law responds to years of criticism that the cap fell hardest on taxpayers in states with higher state and local taxes — states like Connecticut and New York.

The SALT Deduction Income Limit: How the Phase-Out Works

The higher cap does not apply equally to everyone. The law builds in an income limit: once a taxpayer's income passes the threshold set in the statute, the enlarged cap phases back down. At high enough income levels, the deduction returns to the neighborhood of the original limit.

In plain English: the expanded SALT deduction is aimed at middle- and upper-middle-income households. The highest earners get little or none of the new benefit. Where you land depends on your filing status and your income for the year, so the same property tax bill can produce very different deductions for two different households.

Because the phase-out turns on your income in a given year, timing matters. A year with unusual income — a business sale, a large bonus, a big capital gain — can shrink your SALT deduction in that same year.

Who Feels the Cap Most

Two groups run into the SALT cap more than anyone else:

• Homeowners in high-property-tax states. Taxpayers in New York, New Jersey, Connecticut, and California are the most likely to be affected, because property taxes plus state income taxes routinely exceed the cap. For many homeowners, the cap has reduced the tax benefit of owning a home, and it has potentially affected housing markets in high-tax areas.
• Owners of pass-through businesses. If your LLC, partnership, or S corporation passes its income through to your personal return, the state income tax on that business income counts toward your personal SALT cap — unless the business uses the entity-level workaround described below.

What This Means for You

Here is the practical effect, in order of how it usually shows up:

• Itemize or take the standard deduction? The TCJA raised the standard deduction at the same time it capped SALT. With the cap in place, fewer taxpayers benefit from itemizing at all. If your capped SALT amount plus your other itemized deductions do not beat the standard deduction, the cap costs you nothing — but you also get no deduction for those state taxes.
• If you itemize and live in a high-tax state, the cap is likely your binding limit. The Big Beautiful Tax Act's higher caps may restore some of the deduction, depending on your income and filing status.
• If you own a pass-through business, you may be able to sidestep the cap on the business portion of your state taxes entirely. That workaround is the most valuable planning tool on this list.

The PTET Workaround for Business Owners

The most effective response to the SALT cap came from the IRS itself. In Notice 2020-75, the IRS confirmed that partnerships and S corporations may make an annual election to pay state and local taxes at the entity level. The owners then receive a credit for the pass-through entity tax (PTE tax) on their personal state returns.

Why does that work? Because the SALT cap applies to individuals, not to businesses. When the business itself pays the state tax, the tax comes off the business's income before it ever reaches the owner's federal return — no cap involved.

Connecticut has its own pass-through entity tax that follows this model, so Connecticut business owners can use the election to deduct state taxes on business income without running into the personal SALT cap. Whether the election helps in your situation depends on your entity type, your state, and the mix of owners — it is worth reviewing each year rather than setting once and forgetting.

The Charitable-Fund Workaround (Mostly Closed)

Some states tried a different route: state-administered charitable funds. Taxpayers would make "charitable contributions" to a state fund, receive state tax credits in return, and deduct the payment as a charitable gift — which is not subject to the SALT cap.

The Treasury Department and IRS shut most of this down. Their regulations treat the state tax credit you receive as a "quid pro quo" that reduces your federal charitable deduction. This route is largely off the table.

The Takeaway

The SALT cap is still with us, but it is no longer one-size-fits-all. Under the Big Beautiful Tax Act, the cap amount now depends on your filing status and your income, and it will adjust for inflation going forward.

If you take away one thing: check two numbers before year-end — your projected income against the phase-out, and, if you own a pass-through business, whether the PTE tax election covers the state tax on your business income. Those two checks capture most of the planning value the current law offers.

If you want help running those numbers for your situation, we offer a $50 consultation. Book a consultation here.

Disclaimer: This blog post is intended for informational purposes only and does not constitute legal or tax advice. Tax laws are complex and subject to change. Please consult with a qualified tax professional for advice specific to your situation.