SALT Cap 2026: The $40,400 Limit Explained
For eight years, the $10,000 SALT cap has been the most hated number in high-tax states. The 2026 tax law — the One Big Beautiful Bill Act, signed July 4, 2025 — finally raised it: for 2026, you can deduct up to $40,400 in state and local taxes. That's a 4× increase, and it changes the itemize-vs-standard math for millions of households in New York, New Jersey, California, Connecticut, Illinois, and other high-tax states.
Here's how the new SALT cap works, who actually benefits, the phaseout that claws it back from high earners, and the marriage quirks nobody warns you about.
What SALT is (and what the cap does)
SALT stands for state and local taxes — primarily your state income taxes (or sales taxes, if you elect those instead) plus local property taxes. If you itemize deductions on Schedule A, SALT has historically been one of the biggest line items. The 2017 tax law capped it at $10,000, which pushed millions of households — especially in high-tax states — into taking the standard deduction instead, since their itemized total no longer beat it.
The 2026 tax law keeps the cap concept but quadruples the number: $40,000 for 2025, $40,400 for 2026, then +1% per year through 2029. In 2030, the cap reverts to $10,000 unless Congress acts — a built-in cliff worth planning around.
The year-by-year cap
| Tax year | SALT cap |
|---|---|
| 2025 | $40,000 |
| 2026 | $40,400 |
| 2027 | ~$40,804 (+1%) |
| 2028 | ~$41,212 (+1%) |
| 2029 | ~$41,624 (+1%) |
| 2030 | $10,000 (reverts) |
Who benefits
The winners are itemizers in high-tax states with combined state income tax + property tax bills well above $10,000. The classic profile: a homeowner in New Jersey, New York, Connecticut, California, or Illinois paying $18,000 in state income tax and $14,000 in property tax — $32,000 of SALT that was capped at $10,000 and is now fully deductible (under the $40,400 cap).
Who doesn't benefit:
- Standard-deduction filers — if your total itemized deductions (SALT + mortgage interest + charitable + medical) still don't beat the standard deduction, the higher cap changes nothing for you.
- Residents of no-income-tax states (Texas, Florida, Washington, etc.) — your SALT is mostly property tax, and unless that's enormous, you likely weren't hitting even the old cap.
- High earners over the phaseout — see below.
The $500,000 phaseout
The expanded cap phases down for high earners: once your MAGI exceeds $500,000, the cap shrinks by 30 cents for every dollar over the threshold. At roughly $601,333 of MAGI, the 30% haircut wipes out the entire $30,400 increase — leaving you effectively back at the old $10,000 cap.
Example: MAGI of $550,000. Excess = $50,000. Reduction = 30% × $50,000 = $15,000. Your cap: $40,400 − $15,000 = $25,400.
This creates a genuine planning consideration for households near $500,000: bunching income or deductions across years can move you across the phaseout line in either direction.
The marriage quirks
Two oddities Congress left in:
- Same cap for single and joint filers. A single person gets the same $40,400 cap as a married couple filing jointly. Two unmarried high earners living together could each claim up to $40,400 — a married couple gets half that per person. It's a real marriage penalty baked into the provision.
- Married filing separately: halved. MFS filers get a $20,200 cap each. Combined, a separately-filing couple gets the same $40,400 total as a joint return — so there's no doubling trick here, just the paperwork headache.
Should you itemize again?
This is the practical question. For years, the advice in high-tax states was "just take the standard deduction." The $40,400 cap reopens the analysis. Run the comparison:
- Add up SALT (capped at $40,400), mortgage interest, charitable contributions, and deductible medical expenses.
- Compare against the standard deduction for your filing status.
- Remember the new $1,000/$2,000 above-the-line charitable deduction for non-itemizers (2026 tax law) — if you don't itemize, you still get a small charitable write-off, which slightly narrows the gap.
- Don't forget the senior deduction — taxpayers 65+ get an extra $6,000 per person ($12,000 joint) that stacks on top of either the standard deduction or itemized deductions. See our senior tax deduction 2026 guide.
A worked example: married couple in New Jersey, $24,000 state income tax + $16,000 property tax = $40,000 SALT (fully under the cap), plus $9,000 mortgage interest and $4,000 charitable = $53,000 itemized vs. roughly $32,000 standard deduction. Itemizing wins by about $21,000 of extra deductions — worth roughly $4,600 in the 22% bracket. Under the old $10,000 cap, the same couple had $23,000 itemized and took the standard deduction. The new cap flipped the answer.
Property tax prepayment games
Every SALT change revives the same question: should I prepay next year's property taxes to bunch deductions? Under the higher cap, bunching is less urgent than it was — but with the 2030 reversion to $10,000 looming, taxpayers may want to accelerate deductible state and local payments into 2026–2029 and defer into 2030+. The IRS has historically limited prepayment of income taxes (you can't deduct what isn't assessed yet), but property tax prepayment where the liability is established is a legitimate, if fiddly, strategy. Get professional advice before moving money around.
The 2030 cliff
Unlike most 2026 tax-law individual provisions (which expire after 2028), the SALT expansion runs through 2029 and then snaps back to $10,000 in 2030. That gives high-tax-state itemizers a four-year window (2026–2029) of elevated deductions — and a planning horizon. Major decisions with multi-year tax consequences (home purchases, moves, Roth conversions) should be modeled with both the high cap and the reversion in view.
Frequently asked questions
Does the higher cap help if I take the standard deduction?
No — SALT is an itemized deduction. But the higher cap may push your itemized total above the standard deduction, so rerun the comparison.
I'm single. Is my cap really the same $40,400?
Yes. The statute sets one cap amount regardless of filing status (except MFS, which is halved).
Do I include sales tax or income tax?
You elect one: state and local income taxes or sales taxes, plus property taxes either way. Most income-tax-state residents pick income tax.
What if my state doesn't conform?
SALT is a federal deduction — state conformity doesn't affect it. (Conformity matters for the new worker deductions like tips and overtime, not SALT.)
Should I still bunch charitable gifts?
With itemizing viable again for more households, bunching two years of charitable gifts into one year (via a donor-advised fund, for example) pairs well with the higher SALT cap.
The SALT change is the itemizer's story in the 2026 tax law; the worker's story is the new deductions. Hourly workers should read our overtime tax deduction 2026 guide, and taxpayers 65+ should see the senior tax deduction — which stacks on top of itemized deductions too.
Deeper analysis at the Tax Foundation (the best SALT modeling in the business), IRS.gov for Schedule A instructions, and Kiplinger's tax section for state-by-state angles.