For eight years, the federal $10,000 cap on deducting state and local taxes (SALT) made itemizing pointless for most Indiana homeowners. The 2025 federal tax law (the One Big Beautiful Bill Act) changed the math: the cap jumped to $40,000 for 2025, and for 2026 it's $40,400, indexed up 1% a year through 2029 before reverting to $10,000 in 2030.
Indiana is a low-property-tax state, so the reflex is to assume this doesn't matter here. For most households that's right — but for a specific, sizable slice of Hoosier homeowners, the new cap turns itemizing back on. Here's how to tell which side of the line you're on.
The New Rules in Brief
Per the Bipartisan Policy Center's summary of the OBBBA changes:
| Feature | Rule |
|---|---|
| Cap, tax year 2025 | $40,000 ($20,000 married filing separately) |
| Cap, tax year 2026 | $40,400, then +1% per year through 2029 |
| High-income phase-down | Above $500,000 MAGI, the cap shrinks by 30% of the excess — but never below $10,000 |
| After 2029 | Reverts to a flat $10,000 with no income phase-down |
| What counts | Property taxes plus state and local income taxes or sales taxes — not both |
Two structural facts to keep in mind: you must itemize to use any of it (the standard deduction is $15,750 single / $31,500 joint for 2025, indexed after that), and the SALT bucket combines your property tax bill with your Indiana state and county income taxes.
The Indiana Math
Indiana's state income tax rate for 2026 is a flat 2.95% (per the DOR's published rates), scheduled to reach 2.9% in 2027, plus a county local income tax between roughly 0.5% and 3.15%. Call combined income tax roughly 4–5% of AGI for many households. Property taxes on a capped homestead run about 1% of gross assessed value.
Work an example — married couple, $200,000 income, $400,000 home in a 2% LIT county:
- Indiana income tax: ~$5,900 state + ~$4,000 county ≈ $9,900
- Property tax on the homestead: ≈ $4,000
- SALT total: ≈ $13,900
Under the old $10,000 cap, nearly $4,000 of that was wasted, and $10,000 alone rarely beat the joint standard deduction. Under the new cap, the full $13,900 counts — and combined with mortgage interest and charitable giving, this household plausibly clears the standard deduction and saves real money itemizing. That's the profile the change helps: dual-income households with an above-median home and a mortgage, heavily concentrated in places like Hamilton, Boone, and Hendricks counties.
Below that profile — median income, modest home, small or no mortgage — the SALT total still sits nowhere near the standard deduction, and nothing changes. The old advice stands: take the standard deduction and don't overthink it.
Note
The phase-down means the benefit narrows again at the top: a household with $600,000 of MAGI loses $30,000 of cap (30% of the $100,000 excess), landing back at the $10,000 floor. The sweet spot for the new SALT cap is high-but-not-highest income.
What This Changes About Your Property Tax Bill
Mechanically, nothing — your Indiana bill is what it is. Strategically, two things:
- The after-federal-tax cost of your property taxes may have dropped. For an itemizer in the 24% bracket, a $4,000 property tax bill now effectively costs ~$3,040. That changes the calculus on marginal housing decisions, but it does not change the value of getting the bill right in the first place — a wrong assessment still costs you 76 cents on every wrongly billed dollar.
- Timing matters for the deduction. The federal deduction follows the year you pay. Indiana's split installments (May and November) both land in the same calendar year, but if you're near an itemizing threshold, paying the spring installment on time versus rolling delinquencies across year-ends changes which federal year gets the deduction. Keep it simple: pay on time — the due-date guide has the calendar — and let the deduction follow.
Only the tax portion of your statement is deductible as property tax. Non-tax lines like drainage assessments and service fees are charges for services, not deductible state and local taxes.
Don't Confuse It With Indiana's Own Deductions
The federal SALT deduction stacks on top of, and is entirely separate from:
- The homestead deductions and credits on the bill itself — see the 2026–2031 phase-in schedule
- Indiana's state income tax deductions for property tax paid and rent paid — smaller and often overlooked, covered in our state income tax deductions guide
All three layers reward the same underlying discipline: know your assessed value, keep your deductions attached, and challenge a bad assessment. Pull your parcel in property lookup to see the numbers the whole stack is built on, and if the assessment itself is inflated, our tax appeal service fixes the layer that feeds the rest.