SALT deduction cap

How the SALT cap works

The State and Local Tax (SALT) deduction lets taxpayers who itemize on their federal return deduct certain state and local taxes paid during the year. The deduction has existed in one form or another since the federal income tax was introduced in 1913. What's new is the cap: as of the 2017 Tax Cuts and Jobs Act, the total SALT deduction is limited to $10,000 per return ($5,000 for married filing separately), regardless of how much you actually paid.

Eligible taxes include:

• State and local income taxes OR state and local sales taxes — your choice; pick the larger
• Property taxes on real estate you own
• Property taxes on personal property (vehicles in states that tax them — VA, MA, MO, etc.)

Foreign income taxes can be deducted (subject to other rules) but foreign property taxes generally cannot. Federal income tax, federal excise taxes, and Social Security taxes are not part of SALT.

Deductible SALT = min(Property tax + State/local tax, $10,000)

Why the cap matters

Before 2017, a New Jersey homeowner paying $14,000 in property tax and $8,000 in state income tax could deduct all $22,000. After 2017, only $10,000 was deductible — a $12,000 loss of deduction, worth roughly $3,000 in additional federal tax at a 24% marginal bracket. Multiplied across millions of households in high-tax states, this is one of the most expensive provisions of the TCJA for upper-middle-income earners in NJ, NY, CA, CT, IL, MA, and similar.

The 2025 sunset and what comes next

The $10,000 cap is part of the TCJA's individual provisions, all of which sunset on December 31, 2025 unless Congress extends them. The legislative landscape as of 2025 includes:

• Bipartisan proposals to raise the cap to $20,000 or higher
• Proposals to eliminate the cap entirely (favored by representatives in high-tax states)
• Proposals to extend the current cap unchanged as part of a broader TCJA renewal
• The standard deduction roughly doubled by TCJA also sunsets — meaning more taxpayers may itemize again post-2025

Any of these outcomes is possible. Plan for the current cap, but revisit your strategy if the law changes.

Itemize vs. standard deduction

The SALT deduction only matters if you itemize. With the post-TCJA standard deduction at ~$30,000 for joint filers (2025), most households take the standard deduction and never see the SALT cap. You should run both calculations:

• Standard deduction (2025): ~$15,000 single / $30,000 joint / $22,500 head of household
• Itemized deduction = SALT (capped) + mortgage interest + charitable + other

If the standard deduction is larger, the SALT cap doesn't affect you this year — you're not losing anything, you just aren't gaining anything either.

Worked examples

Example 1 — Classic New Jersey hit. Married couple filing jointly: $12,500 property tax, $8,800 state income tax, 24% federal bracket:

• Total SALT paid: $21,300
• Deductible (capped): $10,000
• Lost to cap: $11,300
• Federal savings lost: $11,300 × 24% = $2,712

Example 2 — Texas (no state income tax) high property tax. Property tax $11,500, no state income tax, sales tax election ~$2,000, 32% bracket:

• Total SALT paid: $13,500 (using sales-tax election)
• Deductible (capped): $10,000
• Lost to cap: $3,500
• Federal savings lost: $3,500 × 32% = $1,120

Even no-state-income-tax states feel the cap when property tax alone exceeds $10,000.

Example 3 — California, near the cap. Single filer in LA: $9,000 property tax, $7,500 CA income tax, 32% bracket:

• Total SALT paid: $16,500
• Deductible (capped): $10,000
• Lost to cap: $6,500
• Federal savings lost: $6,500 × 32% = $2,080

Example 4 — Below the cap. Suburban Indiana homeowner: $3,400 property tax, $4,800 state/local income tax, 22% bracket:

• Total SALT paid: $8,200
• Deductible: $8,200 (under cap, full deduction)
• Cap impact: $0

The cap doesn't bind for the majority of the country. Roughly 70% of households fully deduct their SALT.

Common mistakes

• Forgetting the income-vs-sales-tax election. You can deduct state and local income taxes or state and local sales taxes — not both. In no-income-tax states (TX, FL, WA, NV, TN, SD, WY, AK, NH on most income), the sales tax election is the right choice. The IRS publishes a sales tax tables you can use without receipts.
• Skipping personal property tax. If your state taxes vehicles (VA, MO, MA, KY, MS, RI, AR, etc.), the registration / "personal property tax" portion is part of SALT and often forgotten.
• Counting prepaid taxes incorrectly. You deduct what you actually paid in the tax year. Prepaying next year's property tax in December only counts if it was actually billed in the current year (the IRS clarified this after TCJA).
• Forgetting to itemize at all. If you take the standard deduction, you get no SALT deduction. Many homeowners with under-cap SALT plus modest mortgage interest still come out ahead with the standard deduction.
• Using marginal rates incorrectly. The federal savings-lost calculation uses your marginal bracket — the rate you'd pay on the next dollar of income — not your effective rate.

Frequently asked questions

Does the SALT cap apply per person or per return?

Per return. A married couple filing jointly gets a single $10,000 cap, not $10,000 each. Married filing separately gets $5,000 each — usually worse than joint.

Can I deduct SALT on rental properties?

Property taxes on rental properties are deducted as an expense on Schedule E, not as part of SALT on Schedule A. They're not subject to the $10,000 cap because they're a business expense, not a personal itemized deduction.

Are HOA fees deductible as SALT?

No. HOA fees are not taxes — they're private association dues. They can be deductible against rental income for rental properties, but they're not part of personal SALT.

Are special assessments (CDDs, Mello-Roos) deductible?

It depends. Charges that primarily fund services (operations, maintenance) are generally deductible as property tax. Charges that fund capital improvements on your specific property are generally not. The IRS calls these "non-deductible local benefits." Talk to a CPA if your line items are large.

What's the PTE workaround?

Many states (NJ, NY, CT, MA, CA, CO, etc.) have enacted pass-through-entity (PTE) tax regimes that let business owners pay state taxes at the entity level. The entity gets a federal deduction (not subject to the $10K cap), and the owner gets a state credit. It's a substantial workaround for S-Corp and partnership owners, but doesn't help W-2 wage earners. CPA consultation strongly recommended.

Should I bunch property tax payments?

Bunching — paying two years of property tax in a single calendar year — can sometimes push you over the standard-deduction threshold, letting you itemize that year and take the standard deduction the next. But the SALT cap limits how much bunching helps; you can't bunch above $10,000.

Does the cap apply to AMT?

Yes — the SALT deduction is also disallowed under the Alternative Minimum Tax. Pre-TCJA, AMT was the bigger problem for SALT-heavy taxpayers; post-TCJA, the regular cap binds first for most.

When does the cap expire?

Currently scheduled to sunset December 31, 2025 along with most other TCJA individual provisions. Congress is actively debating whether to extend, modify, or replace the provisions. Check the latest legislative state when planning multi-year tax strategy.