Background: What Has Changed for SALT?
The One, Big, Beautiful Bill Act temporarily raises the cap on the federal state and local tax (SALT) deduction from $10,000 (TCJA’s standard) to $40,000 for tax years 2025 through 2029, with adjustments for inflation. After 2029, the cap reverts back to $10,000. (cov.com)
The benefit phases down for taxpayers with modified adjusted gross income (MAGI) over $500,000—at a rate of 30% of the excess MAGI. The deduction never drops below $10,000, even for high MAGI. (cov.com)
Scenario: New York Resident With High State Tax Payments
- Individual filing jointly, resident of New York, with a MAGI of $550,000.
- State and local taxes paid: $50,000 in state income tax and $35,000 in property tax, totaling $85,000.
Under old rules (cap at $10,000), the taxpayer could deduct only $10,000 of SALT. Under OBBBA’s new temporary cap, the deduction limit is $40,000—But, because MAGI exceeds $500,000, there's a phase-down:
Phase-down amount = 30% × (MAGI − $500,000) = 30% × $50,000 = $15,000 Adjusted cap = $40,000 − $15,000 = $25,000
So, instead of being limited to a $10,000 deduction, this taxpayer may deduct $25,000 in SALT for 2025 (or for tax year 2025 returns filed in 2026), assuming no other restrictions. That’s a $15,000 increase in potential deduction.
Practical Takeaways
- Check your taxable year's income: MAGI threshold is $500,000; every dollar above it reduces your benefit.
- Timing matters: The raised cap applies for 2025-2029; consider whether shifting deductions (property tax payments or state prepayments) can take advantage of these years.
- Bundle deductions if possible: If making large property tax or state income payments, timing them in fall 2025 or 2026 could maximize deductions before returning to the lower cap in 2030.
What To Watch Out For
- Calculate whether your income level will phase you out significantly; those with MAGI much above $500,000 may have only modest gains.
- Beware of keeping precise records—property tax, state tax, local tax receipts—that support deduction claims.
- Monitor inflation adjustments: Cap (e.g. the $40,000) will increase slightly each year through 2029.
Takeaway Summary
For high-tax state residents with moderate to high income, the SALT deduction cap increase under OBBBA offers meaningful relief—but only if you plan ahead for phase-outs and make sure your itemized deductions are large enough to benefit.