How to Appeal Your Marion County Property Tax Assessment Before the Deadline
A step-by-step guide to filing a Marion County property tax appeal, with the right forms, the real timeline, and what to do first if you live in Fountain Square, Bates-Hendricks, or anywhere else t…
A step-by-step guide to filing a Marion County property tax appeal, with the right forms, the real timeline, and what to do first if you live in Fountain Square, Bates-Hendricks, or anywhere else that’s seen sharp appreciation.
If your 2026 property assessment notice arrived and the number made you do a double-take, you’re not alone. Marion County homeowners in neighborhoods that have seen real appreciation—Fountain Square, Bates-Hendricks, Near Eastside, Broad Ripple, SoBro, and parts of Lawrence and Pike Township, among others—are opening these envelopes and finding assessed values that have jumped sharply from prior years. In some cases, the new number accurately reflects what homes in those areas have been selling for. In other cases, it won’t. That’s when you need to act.
The Indiana property tax appeal process isn’t complicated, but it’s unforgiving about deadlines. Most generic guides either skip the Marion County-specific details or bury them in state-level boilerplate. This piece fills that gap, and you’ll find additional context on these issues in our home & property coverage. It covers what to do, in what order, with the actual form numbers and filing address, before the clock runs out.
Why 2026 Assessments Are Landing Hard in Indianapolis
Indiana property assessments reflect market value-in-use as of January 1 of the assessment year. In a reassessment year, assessors conduct a systematic revaluation of properties rather than relying on trending adjustments from a prior base year. For 2026, that means assessed values across Marion County are being reanchored to current market conditions.
In neighborhoods where home values have climbed steadily over the past three to four years, that reanchoring can produce a significant jump in a single notice. Fountain Square and Bates-Hendricks have both experienced sustained buyer demand that drives assessed values upward. The Near Eastside, Broad Ripple, and SoBro have seen similar dynamics. In parts of Lawrence and Pike Township, new development and rising sale prices have had the same effect.
None of that means every high assessment is correct. Assessors work at scale, relying on mass appraisal methods that sometimes produce errors in property data—square footage, bedroom count, lot size, finished basement area—and sometimes generate values that simply don’t hold up when you look at the actual comparable sales. The appeal process exists precisely because those errors happen, and because reasonable people can disagree about what a property is worth on a given date. So if your assessed value jumped, the question isn’t whether the number feels high. It’s whether the evidence supports a lower one.
Your Actual Deadline and Why Missing It Closes the Door
Under Indiana Code 6-1.1-15-1, a property owner has 45 days from the mailing date of the assessment notice to file a petition for review. Not 45 days from when you open the envelope. Not 45 days from when you first look at the number. The clock starts on the date the notice was mailed.
A week spent sitting on the kitchen counter is a week off your appeal window. The spring timing makes this worse. The appeal deadline and Indiana’s May 10 first-installment property tax payment can land within weeks of each other—sometimes the same week—creating a crunch that catches homeowners off guard every year. The exact 2026 calendar deadline for Marion County depends on when the Marion County Assessor’s Office mails notices, and that date isn’t always the same year to year.
Before you assume any specific date, call the Marion County Assessor’s Office at 317-327-4907 or visit the office at 200 E. Washington St. to confirm when notices were mailed. That mailing date is the number you need to count forward from. Don’t rely on a neighbor’s timeline, a mailing date printed on someone else’s envelope, or any date referenced in a news article. Confirm it directly. Missing the 45-day window effectively closes the door on the 2026 assessment — you can’t go back and appeal a year you didn’t file on time. If you’re reading this and uncertain whether your window is still open, stop and confirm before doing anything else. Everything else in this guide is irrelevant if that deadline has passed.
Before You File Anything, Request the Informal Review First
Before filing a formal petition, Marion County homeowners can request an informal review with the assessor’s office. The purpose is straightforward: if the assessed value is high because of a data error, an informal review can correct that without the months-long wait of a formal hearing.
Say the property record shows 2,400 square feet when your house is 1,850. Say it lists three bathrooms when you have two. Say it includes a finished basement that hasn’t been finished since 1978. Those are the kinds of errors an informal review can fix — and they’re more common than most homeowners expect.
The assessor’s office maintains property record cards that capture physical characteristics of each parcel, and those cards sometimes contain outdated or just plain wrong information. Requesting your property record card and checking it against reality is a logical first step regardless of whether you ultimately pursue a formal appeal. Marion County uses a township assessor structure. The county has nine township assessors—Center, Decatur, Franklin, Lawrence, Perry, Pike, Warren, Washington, and Wayne—and depending on where your property sits, initial assessment questions may be directed to the relevant township office rather than the county-level office. If you’re not sure which township you’re in, the Marion County Assessor’s website can help you locate the right contact.
One important thing: confirm with the Marion County Assessor’s Office whether requesting an informal review affects your 45-day filing deadline in any way. Do not let an informal review run out the clock on you. If the informal review resolves your concern, great — you may not need to file a formal petition. But if it doesn’t, you need to have filed, or file immediately, before the deadline passes.
What Evidence Actually Moves an Assessor
Filing an appeal without evidence is just paperwork. What matters is documented, specific proof that the assessed value is higher than what the property is actually worth.
Recent sales of similar properties in the same neighborhood are the foundation of most successful appeals. You want sales that are genuinely comparable: similar square footage, similar age, similar condition, similar lot size, within roughly a half-mile to a mile of your property, and sold reasonably close to January 1, 2026 — the valuation date. A real estate agent can pull a comparative market analysis for you, often at no cost if they’re hoping for future business. You can also pull sales data yourself through the Marion County Assessor’s online GIS tool or through public records. Spring home sale season generates fresh comp data that’s particularly useful for appeals filed in that same window.
A formal appraisal from a licensed Indiana appraiser is the strongest document you can bring to an appeal. It’s a professional, defensible opinion of value as of the relevant date, conducted by someone with no stake in the outcome. Whether the cost is worth it depends on the size of the potential reduction — an appraisal that costs $400 doesn’t make sense if it would only recover $200 in tax savings. Confirm current appraisal pricing with local licensed appraisers before proceeding.
If your property has issues that reduce its market value — foundation problems, roof damage, deferred maintenance, structural issues — you need photos and contractor estimates to document them. Assessors using mass appraisal methods typically assume average condition unless you show them otherwise. A set of dated photographs and a written estimate from a licensed contractor can establish condition issues that the property record card simply doesn’t reflect.
If your property record card shows incorrect characteristics, document the discrepancy with measurements, floor plans, or permit records. This is the clearest path to a correction because it doesn’t require arguing about market value. It requires showing the record is factually wrong. That’s a much easier argument to win.
Property tax representatives — attorneys or consulting firms that specialize in assessment appeals — typically work on a contingency basis, taking a percentage of the first year’s tax savings. For straightforward data-error cases, you probably don’t need one. For larger properties, commercial properties, or disputes where the assessed value is significantly above what comparables support and the tax savings would be substantial, professional representation can be worth the cost. Contact the Indiana State Bar Association’s referral service for names of attorneys who handle property tax appeals in Marion County.
Form 130 vs. Form 131
Form 130 — Petition for Review of Assessment — is your starting point. This is the county-level petition filed with the Marion County Assessor’s Office at the City-County Building, 200 E. Washington St., Suite 1360. Form 130 initiates a review by the county, which may result in an informal adjustment or a formal county-level hearing. Most Marion County homeowners will file Form 130 first. Full stop.
Form 131 — Petition to the Indiana Board of Tax Review (IBTR) — is the state-level forum. You use Form 131 after exhausting county-level review, or in specific circumstances where the dispute isn’t resolved at the county level. The IBTR is an independent state agency that hears property tax appeals. If your county appeal doesn’t produce a satisfactory result, Form 131 and the IBTR is the next step.
Both forms are available through the Indiana Department of Local Government Finance (DLGF) website at in.gov/dlgf and through the IBTR website at ibtr.in.gov. If you live in Beech Grove, the City of Lawrence, Southport, or Speedway, your municipality is excluded from Unigov — Marion County’s consolidated city-county government structure in place since 1970 — and may have a different administrative structure for the first level of appeal. Confirm with the relevant city office or the Marion County Assessor which office handles your petition. Don’t assume the standard path applies.
How to File at the City-County Building
Once you have your evidence and Form 130 completed, bring everything to the Marion County Assessor’s Office at the City-County Building, 200 E. Washington St., Suite 1360, Indianapolis. Bring at least two copies of everything — one for the office and one for yourself.
When you submit, ask the office to date-stamp your copy of Form 130. This is your proof of timely filing. Don’t leave without it. If you’re mailing instead of hand-delivering, use certified mail with return receipt and keep that receipt permanently. This is not the step to cut corners on.
There’s no filing fee for a Form 130 petition in Indiana. Confirm this with the assessor’s office before assuming, as procedures can change. The City-County Building’s public service hours can vary, and it’s worth calling ahead at 317-327-4907 or checking the assessor’s website to confirm current hours and any appointment requirements before making the trip downtown.
Some older guidance lists the Marion County Auditor’s Office as a receiving point for assessment petitions. The Auditor’s office, also in the City-County Building, is useful for questions about your tax bill and payment records. But for the formal Form 130 appeal petition, the Assessor’s Office at Suite 1360 is the right destination. If you’re uncertain on the day you file, the Auditor’s staff can direct you.
What the Hearing Process Actually Looks Like
After Form 130 is submitted, the assessor’s office reviews the petition. In some cases, this results in an informal adjustment without a formal hearing — the assessor agrees the value should be lower and issues a corrected notice. In other cases, a formal county-level hearing is scheduled.
At a county hearing, you present your evidence — comps, appraisal, condition documentation, or data corrections — to a hearing officer. The assessor’s office presents its case for the original value. You’re not in a courtroom and you don’t need a lawyer, but you do need to be organized and specific. Vague arguments that the number feels too high don’t move hearing officers. Documented comparable sales and an independent appraisal do.
Here’s the part that catches people off guard: Marion County carries a significant case volume. Realistic wait times from filing to hearing have been several months to over a year. This isn’t an overnight process, and expecting a quick turnaround will just frustrate you. Confirm current estimated timelines with the assessor’s office or a local property tax attorney before filing, since case volume fluctuates and processing times change.
The outcome of a county hearing is either a reduction in assessed value or a confirmation of the original value. If the county hearing doesn’t resolve the dispute in your favor, you file Form 131 with the Indiana Board of Tax Review. The IBTR conducts its own independent hearing, and its decisions are appealable to the Indiana Tax Court. Most residential homeowners don’t reach that level, but the path exists if you need it.
Your Tax Bill Doesn’t Wait
Indiana law requires you to keep paying your property tax bill as assessed while an appeal is pending. You don’t get to withhold or reduce payment while you wait for the appeal to work through the system. If you fail to pay your tax bill, you can accrue penalties and interest regardless of your appeal status. The appeal does not put your payment obligation on hold.
If your appeal succeeds, the overpayment is returned as a refund or applied as a credit against your next installment. The refund process takes additional time after the appeal concludes — it doesn’t happen automatically or immediately. Keep that in mind when you’re thinking about cash flow.
The installment due dates to keep in mind: May 10 (first installment) and November 10 (second installment). If your appeal is pending through one or both of those dates, pay on schedule. Contact the Marion County Auditor’s Office to confirm whether any payment arrangement options exist for homeowners with pending appeals. This is a detail that can vary and should be verified directly rather than assumed.
Marion County Contacts and Verified Resources
Marion County Assessor’s Office 200 E. Washington St., Suite 1360, Indianapolis, IN 46204 Phone: 317-327-4907
Verify the current number before calling. Confirm the mailing date for 2026 notices, your 45-day deadline, current filing hours, and whether appointments are required before visiting.
Marion County Auditor’s Office 200 E. Washington St., Indianapolis, IN 46204
For questions about your tax bill, payment status, and refund processing after a successful appeal. Confirm current contact information and suite number directly.
Indiana Board of Tax Review (IBTR) Website: ibtr.in.gov
Form 131 petitions, state-level appeal information.
Indiana Department of Local Government Finance (DLGF) Website: in.gov/dlgf
Download Form 130 and Form 131; find general Indiana assessment appeal guidance.
Township Assessor Offices
For Lawrence, Pike, Warren, Washington, Wayne, and other townships: find contact information through the Marion County Assessor’s website. If your initial question involves a property data error, the township office may be your first call.
For professional representation: The Indiana State Bar Association’s referral service can connect you with attorneys who handle property tax appeals. If your situation involves a large potential tax reduction, commercial property, or a complicated evidentiary dispute, it’s worth at least an initial consultation.
The 2026 reassessment cycle is producing real sticker shock in Indianapolis neighborhoods that have appreciated significantly over the past several years. Some of those high assessments are accurate. Some aren’t. The only way to find out which category yours falls into — and to do something about it if it doesn’t — is to pull your property record card, look at the comparable sales, and move before the 45-day clock runs out. That clock started the day your notice was mailed. Confirm the date and count forward. Everything else follows from that.
