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Mortgage Calculator Indiana
Indiana's homestead tax cap is written directly into the state constitution — 1% of value, guaranteed, no exceptions. This calculator applies the same deductions and cap the county auditor actually uses.
Estimate your Indiana mortgage payment
Updates liveIllustrative estimate only. Homestead bills are constitutionally capped at 1% of gross assessed value — see below. Not a loan offer or financial advice.
Diagram: Indiana's circuit breaker caps are constitutionally guaranteed and cannot be overridden by local levies or voter-approved increases.
Who checks this calculator
Understanding the Indiana mortgage market
What makes an Indiana mortgage different
Indiana offers something truly rare: a property tax bill that's constitutionally guaranteed to never exceed a fixed percentage of your home's value, no matter what local government spending looks like. This mortgage calculator Indiana buyers use is built around that guarantee.
The circuit breaker cap, explained properly
Indiana's Constitution, following a 2010 voter referendum, guarantees that property tax can never exceed a fixed percentage of a property's gross assessed value: 1% for an owner-occupied homestead, 2% for other residential property and agricultural land, and 3% for commercial, industrial and personal property. If the tax calculated from local rates would exceed that percentage, the county automatically applies a "circuit breaker credit," reducing the bill down to exactly the capped amount. These caps are permanent constitutional provisions — local governments cannot vote around them, even with a voter-approved referendum levy. This mortgage calculator Indiana tool builds that guarantee in from the start.
Gross assessed value vs net assessed value
This is the detail that trips up a lot of people: the cap is measured against gross assessed value (GAV) — your home's value before any deductions are applied — not the smaller net assessed value your actual tax rate gets applied to. In practice, this means many Indiana homesteads never actually hit their 1% cap at all, because the standard and supplemental deductions have already reduced the taxable value enough that the calculated tax comes in well under 1% of the original gross value.
| Property class | Circuit breaker cap | Applies to |
|---|---|---|
| Homestead | 1% of gross assessed value | Owner-occupied primary residence |
| Residential / agricultural | 2% of gross assessed value | Rentals, farmland, second homes |
| Commercial / industrial | 3% of gross assessed value | Business and other property |
The Homestead Standard and Supplemental Deductions
Before any tax rate is applied, an owner-occupied Indiana home receives two deductions from its gross assessed value: the Homestead Standard Deduction, set at $48,000 for 2026, and the Supplemental Deduction, which removes 40% of whatever value remains after the standard deduction is subtracted. Together, these substantially shrink the taxable base — a home with a $250,000 gross assessed value might see its actual taxable net assessed value land closer to $121,200 once both deductions are applied.
The 2026 automatic homestead credit
Starting with the 2026 tax year, Indiana introduced an automatic 10% credit applied directly to a qualifying homestead's final tax liability, up to a maximum credit of $300, applied by the county auditor with no separate application needed, per the DLGF's tax bill guidance. This sits on top of the existing deductions and circuit breaker cap, part of a broader property tax reform package phasing in additional benefits — including new percentage-based deductions for non-homestead residential and agricultural property — through 2031.
When does the cap actually kick in?
The 1% cap matters most in areas with higher combined local tax rates — Lake County, Marion County, and certain school districts with additional referendum levies are where the circuit breaker credit most commonly activates for homeowners. In lower-rate counties, many homesteads' actual calculated tax, after standard deductions, already sits comfortably under 1% of gross value, meaning the constitutional cap is a backstop rather than the determining factor for their bill.
Veteran and senior deductions
Indiana offers deductions ranging from 50% to 100% of a home's assessed value for eligible veterans who served at least 90 days, received an honorable discharge, and have a qualifying service-connected disability rating — a truly substantial benefit. Starting with 2026 tax bills, the previous Over 65 Deduction was replaced with a new Over 65 Credit worth up to $150, separate from other homestead benefits, for qualifying senior homeowners.
A worked example, start to finish. Say a buyer purchases a $270,000 home in Indiana (gross assessed value roughly matching purchase price). After the $48,000 Homestead Standard Deduction and the 40% Supplemental Deduction on the remainder, the net assessed value comes to roughly $133,200. At a combined local rate producing an effective tax around $2,025 on that net value, this comes out to roughly 0.75% of the original gross assessed value — safely under the 1% constitutional cap, so no circuit breaker credit is needed.
With a 10% down payment, this buyer finances $243,000 at 6.6% over 30 years, giving a principal and interest payment of about $1,551. Property tax adds roughly $169 a month, and with typical insurance, the full monthly payment comes to about $1,848.
If this buyer instead purchased in a higher-rate district where the calculated tax would exceed 1% of gross value, the county would automatically apply a circuit breaker credit, capping the actual bill at exactly 1% regardless of the nominal local rate — a real, constitutionally guaranteed ceiling that few other states offer their homeowners.
How to use this mortgage calculator Indiana tool
Enter the home price and down payment you're working with, along with your expected interest rate and loan term. The effective tax rate field defaults to a typical figure of 0.75%, reflecting standard deductions already applied — adjust it if you know your specific county's actual effective rate. Add an estimated annual insurance premium, and this mortgage calculator Indiana shows your full estimated monthly payment.
Common mistakes to avoid
- Applying 1% directly to the full home price without deductions. The cap is on gross value; your actual bill usually comes from a smaller net value.
- Assuming every homestead hits the 1% cap. Many bills settle well under the cap once standard deductions are applied.
- Missing the 2026 automatic 10% credit. It applies without an application, but it's worth confirming it's reflected on your bill.
- Not applying for veteran or senior benefits. These require filing with the county assessor and aren't always automatic.
- Assuming the cap applies to non-homestead property the same way. Rentals and second homes fall under the 2% cap, not 1%.
Quick glossary
- Circuit breaker cap
- Indiana's constitutional limit on property tax as a percentage of gross assessed value: 1% for homesteads, 2% for other residential/agricultural, 3% for commercial.
- Gross assessed value (GAV)
- A property's value before any deductions are applied; the figure the circuit breaker cap is measured against.
- Net assessed value
- The taxable value remaining after standard and supplemental deductions, used to calculate the actual tax owed before any cap.
- Homestead Standard Deduction
- A fixed deduction ($48,000 for 2026) subtracted from gross assessed value for an owner-occupied Indiana home.
- Supplemental Deduction
- An additional deduction removing 40% of remaining assessed value after the Standard Deduction, for owner-occupied homes.
The bottom line
Indiana offers a truly rare guarantee: no owner-occupied home will ever pay more than 1% of its gross assessed value in property tax, protected directly by the state constitution. In most counties, generous standard deductions mean the actual bill lands even lower than that. Confirm your specific county's current effective rate, and this mortgage calculator Indiana gives you a realistic, cap-aware starting point for what a home here actually costs each month.
Common questions