Every year, your county assigns your home an assessed value, and that number drives your property tax bill. Most of the time it's reasonable — but assessments are estimates, and estimates can be wrong. If yours looks too high, you have the right to challenge it. Learning how to appeal your property tax assessment in Indiana is straightforward, and for an over-assessed home it can be well worth the afternoon it takes. Here's how the process works and how to make your case.
How Indiana Assessments Work
Indiana assesses property at its market value-in-use — essentially an estimate of what your home would sell for. The county assessor sets that value using mass-appraisal models across whole neighborhoods, which is efficient but imperfect: a model can miss that your home is dated compared with updated neighbors, or that it has a condition issue that would lower a real sale price.
Your assessed value interacts with two things worth understanding: the homestead deduction, which lowers the taxable portion of a primary residence, and Indiana's property tax caps, which limit your bill as a percentage of gross assessed value. Because the assessment feeds the whole calculation, getting it right matters.
When an Appeal Makes Sense
An appeal is worth considering when the assessed value is clearly higher than what your home would actually sell for. Common signs: comparable homes near you are assessed noticeably lower, your assessment jumped in a way the market doesn't support, the county has wrong information on file (too much square footage, a bathroom you don't have, a finished basement that isn't finished), or your home has condition problems the assessment ignores.
Remember what you're actually challenging — the value, not the tax rate. You can't appeal your way out of the rate the local taxing units set, but if the value is too high, correcting it lowers the bill it produces.
The Appeal Process and Deadlines
The mechanics are more approachable than most people expect:
- File with your county. Indiana appeals start with the county assessor, typically using the state's assessment appeal form (Form 130). Many counties accept it by mail, in person, or online.
- Watch the deadline. There's a firm cutoff each year tied to when assessment notices or tax bills go out. Deadlines vary and can change, so confirm the current date with your county assessor and don't wait.
- Informal review first. Most appeals begin with an informal meeting with the assessor's office, where many are resolved. If you don't reach agreement, it can escalate to the county Property Tax Assessment Board of Appeals (PTABOA) and beyond.
- Bring evidence. The burden is on you to show the value is off — so come prepared.
The Evidence That Actually Wins
Appeals are won with data, not frustration. The strongest evidence is recent sales of genuinely comparable homes near you that sold for less than your assessed value. A recent appraisal, if you have one, carries weight too. Photos and estimates documenting condition issues — an aging roof, foundation concerns, deferred maintenance — help when the assessment assumes better condition than reality.
Correcting factual errors is often the easiest win: if the record overstates your square footage or lists features you don't have, that alone can lower the value. This is where your agent can help — a free home valuation built on real neighborhood sales gives you exactly the kind of comparable-sales evidence an appeal needs.
Get the Comps to Make Your Case
You don't have to guess at your home's real market value. Our team pulls recent, genuinely comparable sales in your neighborhood so you can see whether your assessment lines up with reality — and, if it doesn't, walk into your appeal with the evidence in hand.
For the bigger picture on how your bill is built, our property tax caps explainer and homestead exemption guide are worth a read. And remember: this is general information, not tax or legal advice — confirm deadlines and specifics with your county assessor.
An assessment is a computer's best guess, and computers miss things — a dated kitchen, a wrong square-footage number, a comp that doesn't fit. If your value looks high, don't just pay it. Pull the comps and make your case.
— Daniel Cope, Real Estate Broker, Your Realty LinkFrequently Asked Questions
Can I appeal my property taxes in Indiana?
Yes. You can appeal your assessed value with the county assessor, usually with the state's Form 130. You're challenging the value the county assigned, not the tax rate, so a successful appeal lowers the bill that value produces.
What's the deadline to appeal a property assessment in Indiana?
There's a firm annual cutoff tied to when assessment notices or tax bills are issued, and it can vary by county and year. Confirm the current deadline directly with your county assessor and file early.
What evidence do I need to appeal my assessment?
Recent sales of comparable homes that sold below your assessed value are the strongest evidence, along with a recent appraisal, documentation of condition issues, and corrections to any factual errors in your property record.
Will appealing raise my taxes?
An appeal challenges whether your assessed value is too high. If the value is accurate, it typically stays the same; if it's overstated, correcting it lowers your bill. Bring solid comparable-sales evidence to support your case.
Not Sure If You're Over-Assessed?
Get a free, no-obligation home valuation from Your Realty Link built on real Central Indiana sales — the same comparable-sales evidence that supports a property tax appeal.