Congress’s expansion of the state and local tax deduction changed the math for many homeowners, but not evenly. As of 2025, the SALT cap rose from $10,000 to $40,000, then to $40,400 for 2026, creating a larger federal deduction for some households while leaving others with little or no added benefit, according to reporting published September 17 by the Rome Sentinel.
The biggest winners are generally homeowners in high-tax suburbs who itemize and stay below the new income phase-down. The biggest catch is that the benefit begins to shrink once modified adjusted gross income rises above $500,000, or $505,000 for tax year 2026, and it can fall all the way back to the old $10,000 level.
What Changed
The law, described in the article as H.R.1 in the 119th Congress, raised the SALT deduction cap to $40,000 for 2025 and $40,400 for 2026. The article also says the cap rises by 1% annually through 2029 and then reverts to $10,000 in 2030 unless Congress extends it.
That headline figure matters most to taxpayers who already had property taxes and state income taxes well above the old $10,000 limit. In counties such as Essex County, New Jersey, Westchester County, New York, and Lake County, Illinois, median annual property tax bills alone were reported to exceed or roughly meet the prior cap before counting any state income tax liability.
But the larger cap is not a universal tax cut. In lower-tax states, many households still do better with the standard deduction. The article cites 2026 standard deductions of $16,100 for single filers and $32,200 for married couples filing jointly.
Who Is Affected
Households in high-tax regions stand to gain the most, especially if they own a primary residence with a large property tax bill and also owe meaningful state income tax. The article gives one example: a married couple in Bergen County, New Jersey, paying $18,000 in property taxes and $15,000 in state income taxes, for a combined $33,000 of SALT. Under the old $10,000 cap, $23,000 of those taxes were not deductible on Schedule A. Under the 2026 cap of $40,400, the full $33,000 could be deducted.
By contrast, homeowners in states such as Alabama, West Virginia, and Arkansas may see little change because median annual property tax bills there were cited at roughly $700 to $1,200. For many of those filers, itemizing still may not beat the standard deduction.
The phase-down creates a different divide. The article says the expanded deduction begins to roll back once household MAGI exceeds $500,000, or $505,000 in 2026, with those thresholds cut in half for married filing separately. For every $1 above the 2026 threshold, the allowable deduction falls by $0.30, subject to a floor of $10,000, or $5,000 for married filing separately.
The After-Tax Math
The new cap is easiest to understand by looking at the range where the tax break is available, then starts disappearing.
| Example | 2026 SALT Paid | 2026 Allowed SALT Deduction | Notes |
|---|---|---|---|
| Married couple with $33,000 of SALT and MAGI below $505,000 | $33,000 | $33,000 | Entire amount fits under the $40,400 cap |
| Same couple with MAGI of $555,000 | $33,000 | $25,500 | Phase-down reduces deduction by $15,000, based on $50,000 above threshold × 0.30 |
| Joint filer near $606,333 of MAGI | Above $10,000 | About $10,000 | Article says the deduction falls back to the old limit around this income |
Example: a married couple with $555,000 of MAGI in 2026 is $50,000 above the $505,000 threshold. At a reduction rate of $0.30 per $1, their allowable SALT deduction would be cut by $15,000. If they otherwise qualified for a $40,400 cap, the allowed amount would fall to $25,400. If their actual SALT paid were $33,000, their deduction would effectively be limited to $25,500 under the article’s framework because the phase-down reduces the amount they can claim.
This is why the article describes an income trap. In the phase-down band, earning more can mean losing deductions at the same time, raising the effective marginal tax burden for some higher earners in expensive states.
Why Investors and Business Owners May Have More Flexibility
The article draws a sharp line between personal-use property and investment property. Property taxes on a primary home are part of the SALT calculation on Schedule A, where the cap and income phase-down apply. But property taxes on rental real estate rented for more than 14 days a year are treated as ordinary business expenses on Schedule E, according to the article, and are not subject to the $40,000 cap or the $500,000 MAGI phase-down.
The same article says more than 35 states have enacted pass-through entity tax regimes that can let some owners of S corporations and partnerships pay state income taxes at the entity level. That can bypass the personal SALT cap on business income and preserve more room on an individual return for personal property taxes.
That does not make the new law uniformly favorable to affluent households. It means the tax treatment can differ substantially depending on whether the taxes arise from a residence, a rental property, or pass-through business income.
Moves to Discuss With Your Advisor and What to Watch
Three practical issues stand out from the article. First, the itemizing decision matters. Households often compare mortgage interest, charitable gifts and eligible SALT against the standard deduction before assuming the higher cap helps.
Second, local assessment accuracy still matters because a deduction offsets only part of a tax bill. The article says roughly 64% of homeowners experience sticker shock when assessment notices arrive, citing Ownwell analysis. Lowering an assessed value, if warranted under local rules, can reduce the underlying property tax itself rather than just increasing a federal deduction.
Third, timing counts. The article says property tax deductions are recognized in the year a mortgage servicer sends the payment to the taxing authority, not when escrow funds are deposited.
The larger policy issue is durability. The higher SALT cap is temporary under the article’s description, with annual 1% increases through 2029 and a scheduled return to $10,000 in 2030. For affluent households in high-tax states, that means the tax value of homeownership may look meaningfully different over the next few filing seasons than it does after the sunset. Households near the $500,000 MAGI line may want to understand how variable income, bonuses, equity compensation or business income could affect where they land in the phase-down range.
Sources
- First reported How the $40,000 SALT expansion creates high-tax winners and income traps — Rome Sentinel
- How the $40,000 SALT expansion creates high-tax winners and income traps — The Caledonian-Record
- How the $40,000 SALT expansion creates high-tax winners and income traps — The Kansas City Star
After TAX is an independent publication. Articles are general information, not tax, legal or investment advice. Consult a licensed professional about your situation.
