The Indiana property tax calculator gives you a fast, reliable estimate of your annual and monthly property-tax bill based on your home value and the state’s average effective rate. Whether you are buying a first home in Indianapolis, comparing suburbs in Hamilton County, or budgeting for a refinance in Fort Wayne, you can see your estimated tax liability in seconds — no spreadsheet required.
How the calculation works
Indiana taxes property against its True Tax Value — the state’s term for market value — at 100% of that value. This makes Indiana’s math straightforward compared with states that apply a fractional assessment ratio: the effective rate and the nominal millage rate (once converted from per-$100 to a percentage) are directly comparable.
The effective rate this calculator uses is the standard comparison shortcut:
Effective rate = total tax paid ÷ market value
So Indiana’s statewide average of 0.85% means that on average Hoosier homeowners pay $8.50 in annual property tax for every $1,000 of their home’s market value. The formula is:
Annual tax = home value × (effective rate ÷ 100)
Monthly tax is the annual figure divided by 12.
One important caveat: Indiana’s Circuit-Breaker cap limits residential owner-occupant taxes to 1% of gross assessed value. If your calculated annual tax exceeds 1% of your home value, your actual bill will be capped at that 1% threshold. The calculator shows the pre-cap estimate; the Circuit Breaker may reduce it in high-rate counties.
Worked example
Suppose you purchase a home in Marion County (Indianapolis) for $300,000. Marion County’s average effective rate is approximately 0.99%.
- Annual property tax: $300,000 × 0.0099 = $2,970
- Monthly property tax: $2,970 ÷ 12 = $247.50
- Tax per $1,000 of value: $9.90
Now compare that to the statewide average of 0.85%: the same $300,000 home at the state average would generate an annual bill of $2,550 — a $420 per-year difference purely from county location. Suburban Hamilton County at 0.82% would cost $2,460 per year, or $205/month — nearly $500 less annually than Marion County for an identical home value.
| Home value | Eff. rate | Annual tax | Monthly |
|---|---|---|---|
| $200,000 | 0.85% | $1,700 | $142 |
| $275,000 | 0.85% | $2,338 | $195 |
| $400,000 | 0.85% | $3,400 | $283 |
| $300,000 | 0.99% (Marion) | $2,970 | $248 |
| $300,000 | 1.17% (Lake) | $3,510 | $293 |
All figures are calculated in your browser — nothing is uploaded or stored.
Indiana’s Circuit-Breaker cap explained
Indiana is one of only a handful of states with a constitutionally enshrined property-tax cap. Since 2010, Article 10 of the Indiana Constitution has limited residential owner-occupant property taxes to 1% of gross assessed value. This means:
- On a $300,000 home, your total annual residential property tax cannot legally exceed $3,000, regardless of the combined millage rates in your taxing district.
- Rental and farmland property is capped at 2%; commercial and industrial at 3%.
- The cap is calculated on gross assessed value before deductions, so it operates as a ceiling on the total bill rather than on the net taxable value.
For most Indiana homeowners the Circuit Breaker is never triggered — the effective rate of 0.85% is well below 1%. But in Lake County and pockets of Marion County, some properties do benefit from the cap, which is part of why those counties’ effective rates stay below their nominal millage levels.
County rates vary — here is what to check
Indiana millage is set by an overlapping web of taxing units: county, municipality, township, school district, library district, and various special service districts all levy independently. Your actual rate is the sum of every unit that covers your parcel. Before relying on any estimate:
- Look up your gross assessed value on your county assessor’s website — it should equal your property’s market value.
- Find your tax district’s combined rate via the Indiana DLGF Gateway at gateway.ifionline.org — search by parcel number or address.
- Apply deductions you qualify for — the Standard and Supplemental Homestead Deductions can reduce your taxable base by 40–60%, substantially lowering the final bill.
- Check the Circuit-Breaker calculation on your tax notice — if your gross bill exceeded the cap, the saved amount will appear as a credit on the statement.
This calculator gives you the right ballpark for budgeting and comparison; your county assessor and the DLGF gateway give you the exact figure.