An Indiana property tax assessment is the county or township assessor’s determination of your property’s value as of January 1, and that number, minus any deductions you qualify for and subject to constitutional tax caps, drives the bill you receive the following year. Assessors use a mass appraisal system that aims at fair market value, adjust it annually against local sales, and physically re-inspect each property on a four-year cycle. If your number looks too high, you have a written appeal process with firm deadlines.
How Your Assessed Value Gets Set
Every parcel in Indiana carries an assessment date of January 1, and the value on that date determines the taxes you pay the following year.1Indiana Department of Local Government Finance. 2026 Assessment Calendar Local assessors do not appraise each home individually. They apply standardized valuation models to groups of similar properties, working from square footage, lot size, bedroom and bathroom count, age, condition, and location. Renovations, additions, and outbuildings push the value up. Homes near strong schools and desirable amenities tend to assess higher because comparable homes there sell for more.
Between full inspections, assessors keep values current through annual adjustment, often called trending. Each year they compare recent sales in an area to existing assessed values and derive an adjustment factor that pushes assessments toward the market.2Department of Local Government Finance. Fact Sheet – Annual Adjustment of Assessed Values Your assessed value can change from one year to the next even if nothing about your home changed, simply because comparable homes sold for more or less.
On top of trending, Indiana requires a physical inspection of every property on a rolling four-year cycle. Each year, roughly 25% of parcels in the county are inspected so records reflect what actually exists on the ground.3State of Indiana Department of Local Government Finance. Statewide Cyclical Reassessment Fact Sheet An inspector may photograph the property and note features like a finished basement, a new deck, or damage the office did not previously have on file. Your reassessment year is when you are most likely to see a meaningful change in value, because the assessor is working from fresh, on-the-ground data rather than a trending factor.
After the assessment, you receive a Form 11 (Notice of Assessment). That notice is your trigger to review the new number and decide whether to appeal.
Assessed Value vs. Market Value
Assessed value is what your tax bill is calculated on. Market value is what a buyer would actually pay in an open sale. Indiana’s system aims to keep the two close, but mass appraisal can only approximate what any one property would fetch in a real transaction.
Timing is one source of the gap. Because trending uses sales from the prior calendar year, a 2026 assessment reflects 2025 sales. If the market shifts sharply in early 2026, your assessment will not catch up until the following year. Area-wide adjustment factors also lump properties together, so a home with an unusual floor plan or deferred maintenance can end up carried along with better-kept neighbors. And market value responds to things assessors do not consider: bidding wars, creative financing, a seller’s personal urgency. If your assessed value sits noticeably above what comparable homes in your area have actually sold for, that gap is the strongest basis for an appeal.
The Caps That Limit Your Bill
Indiana’s constitution caps property tax as a percentage of assessed value, and these circuit breaker credits apply automatically. You do not file for them.
- Owner-occupied homesteads: tax bill cannot exceed 1% of gross assessed value.
- Other residential property and farmland: 2% of gross assessed value.
- All other property, including commercial and industrial: 3% of gross assessed value.4Department of Local Government Finance. Fact Sheet – Circuit Breaker Caps
The 1% homestead cap requires that the homestead standard deduction be on file. Without it, your home defaults to the 2% cap, doubling your ceiling. One exception applies to all three tiers: property taxes approved by voters in a local referendum are not subject to the caps, so a successful school or infrastructure referendum can push your total bill above them.5DLGF: Referendum Information. Referendum Information
Deductions That Reduce Your Assessed Value
Several Indiana deductions cut the assessed value used to compute your tax. Most require paperwork filed with the county auditor.
Homestead Standard Deduction
The homestead standard deduction is the most valuable break for owner-occupied homes. For the 2026 assessment date, it is $40,000 subtracted from gross assessed value.6Department of Local Government Finance. Deductions and Credits Overview Only your primary residence qualifies, and this deduction is also what unlocks the 1% cap, so missing it costs you twice.
Indiana’s separate mortgage deduction was repealed in 2022, and its value was folded into the homestead standard deduction so homeowners did not lose ground.6Department of Local Government Finance. Deductions and Credits Overview
Supplemental Homestead Deduction
If you receive the standard homestead deduction, a supplemental deduction is applied automatically to the remaining assessed value. It uses percentage tiers: one rate for the portion up to $600,000 and a lower rate above that threshold.7Indiana General Assembly. Indiana Code 6-1.1-12-37.5 – Supplemental Deduction for Homestead Property The percentages have changed several times in recent years, so check your tax statement or ask the county auditor for the current rates.
Over-65 Deduction
Residents aged 65 or older may qualify for an additional deduction on a primary residence. Your adjusted gross income must fall below a threshold that is adjusted annually for cost-of-living increases, and your home’s assessed value must not exceed a statutory cap.8Indiana General Assembly. Indiana Code 6-1.1-12-9 Both limits change with inflation; the county auditor can confirm the current figures.
Disabled Veteran Deduction
Veterans with a service-connected disability of at least 10% can deduct up to $24,960 from assessed value.9Indiana General Assembly. Indiana Code 6-1.1-12-13 – Deduction for Veteran With Partial Disability Veterans who are totally disabled, or who are at least 62 with a disability rating of 10% or more, may qualify for an additional deduction of up to $14,000 if the home’s assessed value is under $240,000.
Blind or Disabled Deduction
Individuals who are legally blind or have a permanent disability can deduct $12,480 from assessed value if the property is their primary residence and their taxable gross income for the prior year did not exceed $17,000.10Indiana General Assembly. Indiana Code 6-1.1-12-11 – Deduction for Blind or Disabled Person
Nonprofit Exemptions
Property owned, occupied, and used exclusively for educational, religious, scientific, or charitable purposes may be fully exempt from property tax.11Indiana General Assembly. Indiana Code 6-1.1-10-16 – Exemption of Building, Land, and Personal Property Used for Various Purposes
Appealing an Assessment You Believe Is Too High
If your assessment looks wrong, Indiana gives you the right to challenge it. The deadlines are unforgiving and the appeals that succeed carry real evidence.
Deadlines Tied to the Form 11
For real property assessed after 2018, the deadline depends on when your county mails the Form 11. If the notice goes out before May 1 of the assessment year, you must file your appeal by June 15 of that same year. If it goes out on or after May 1, the deadline shifts to June 15 of the year your tax bill is mailed.12Indiana General Assembly. Indiana Code 6-1.1-15-1.1 – Taxpayer’s Appeal of an Assessment You file by submitting a written notice, commonly Form 130, to your township or county assessor. Miss the window and the assessment stands for that tax year.
Evidence That Actually Moves the Number
The strongest appeals rest on recent sale prices of comparable properties nearby. Three similar homes on your street selling for $220,000 while yours is assessed at $260,000 tells a clear story. An independent appraisal from a licensed appraiser, which typically runs a few hundred dollars for a standard single-family home, adds weight. Photographs of defects, deferred maintenance, or structural problems help explain why the assessor’s model overshot.
If the property record itself contains an error, say incorrect square footage, a phantom bedroom, or an unfinished basement recorded as finished, bring documentation. Blueprints, building permits, or your own measured dimensions can correct the file. Factual-error appeals usually resolve quickly because the fix is objective.
Keep Paying While the Appeal Is Pending
Filing an appeal does not pause your tax bill. You may pay based on the prior year’s assessed value while the appeal is pending without being penalized for doing so. Skip payment entirely and you are treated as delinquent, with the standard penalties applied.13IN.gov / Department of Local Government Finance. Fact Sheet – Assessment Appeals Homeowners often assume the appeal freezes everything and get hit with a 10% penalty on top of the disputed amount.
From County Board to State Review
If the county assessor does not resolve your appeal informally, the case goes to the county’s Property Tax Assessment Board of Appeals (PTABOA). Hearings are relatively informal. You can represent yourself, hire an attorney, or use a certified tax representative.14Department of Local Government Finance. Certified Tax Representatives The assessor explains how your value was set; you present your counter-evidence; the board issues a written decision.
If more than 180 days pass from the date you filed the appeal without a PTABOA decision, you can escalate directly to the Indiana Board of Tax Review.15IN.gov. How Do I Appeal the Assessment of My Home? If PTABOA does rule and you disagree, you have 45 days to appeal to the IBTR using Form 131.16Indiana Board of Tax Review. Form 131 – Petition to the Indiana Board of Tax Review for Review of Assessment From there, appeals go to the Indiana Tax Court, where legal representation is strongly recommended.
When the Bill Is Due
Indiana property taxes are paid in two equal installments, due May 10 and November 10 of the year following the assessment date.17Indiana General Assembly. Indiana Code 6-1.1-22-9 – Tax Installment Due Dates If a due date falls on a weekend or holiday, the deadline shifts to the next business day. Counties accept payments in person, online, and by mail. If your mortgage lender escrows the tax, the lender pays on your behalf, but confirm they actually submitted on time. Escrow shortfalls happen, and the county holds you responsible regardless.
Your statement may also include special assessments beyond the standard tax. Indiana law defines these to include charges for drainage and ditch maintenance, sewer service, street improvements, and similar local obligations.18Indiana General Assembly. Indiana Code 6-1.1-1-17 – Special Assessment They appear as separate line items and are collected with your property tax.
Late Payments and Tax Sales
Penalties come fast. If you pay within 30 days of the due date and have no prior delinquencies on the same parcel, the penalty is 5% of the overdue amount. Miss the 30-day window or have prior unpaid taxes on the parcel, and the penalty is 10%.19Indiana General Assembly. Indiana Code 6-1.1-37-10 – Penalties for Delinquent Taxes Interest also accrues on unpaid balances.
If penalties have already piled up, some counties can waive, negotiate, or settle them. The county treasurer and auditor can implement such a policy, but only if the county’s fiscal body has approved one, and any agreement must be documented in writing.20Indiana General Assembly. Indiana Code 6-1.1-37-15 – Penalties; Waiver, Negotiation, or Settlement Not every county has one, so call the treasurer before assuming relief is available.
Prolonged delinquency leads to a tax sale. Once a property is delinquent for three or more installments totaling at least $25, the county can auction the tax lien to recover unpaid taxes, penalties, and fees. After the sale, the former owner has a limited redemption period to pay the full outstanding balance plus penalties and costs. Failing to redeem within that window transfers ownership to the purchaser through a tax deed. The process moves forward whether or not every notice reached you.
Keep Your Homestead Status Accurate
If your home no longer qualifies as your primary residence because you moved, converted it to a rental, or transferred ownership, you must notify the county auditor within 60 days of the change. Fail to report it and you are liable for the additional taxes you should have paid without the homestead deduction, plus a civil penalty equal to 10% of those additional taxes.21Department of Local Government Finance. Frequently Asked Questions – Homestead Standard Deduction and Other Deductions Auditors eventually catch discrepancies through address verification and sales records, so reporting the change up front avoids a larger bill later.