The Indiana homestead deduction: filing it right after you buy
The most valuable piece of paper in an Indiana home purchase is not the deed. It is the homestead filing — the application that tells the county auditor this house is where you live. Without it, an owner-occupied house in South Bend, Elkhart or Warsaw is taxed like a rental: no homestead deductions, no homestead credit, and a property tax cap of 2% of gross assessed value instead of 1%. With it, the bill can be a fraction of that. This guide is the filing manual. For how the tax system works as a whole, start with the two-state property tax guide.
What filing actually gets you
One application triggers four separate benefits:
- The homestead standard deduction (IC 6-1.1-12-37), a flat dollar amount taken off your assessed value.
- The supplemental homestead deduction (IC 6-1.1-12-37.5), a percentage of what is left.
- The supplemental homestead credit, new for taxes payable from 2026: the lesser of 10% of the homestead’s tax bill or $300, calculated without referendum taxes. No separate application — the auditor applies it to anyone who has the standard deduction.
- The 1% circuit-breaker cap. The state’s fact sheet is blunt: a property must be receiving the homestead standard deduction to receive the 1% cap.
That last line is the one that matters most. Indiana caps a homestead’s tax bill at 1% of gross assessed value, other residential property and farmland at 2%, and everything else at 3%. The caps are written into Article 10, Section 1 of the state constitution. A house with a $200,000 gross assessed value is capped at $2,000 a year as a homestead and $4,000 without one — before a single deduction is counted.
Who qualifies
The state’s benefits summary (State Form 51781) lists the conditions:
- You own the home, or are buying it under a recorded contract that makes you responsible for the taxes.
- It is your principal place of residence — defined, as of 2026 legislation, as your true, fixed, permanent home to which you intend to return after an absence.
- One homestead standard deduction per individual or married couple. Claiming an equivalent benefit in another state generally disqualifies you.
- The homestead is the dwelling, a garage, and up to one acre of surrounding land, plus decks, patios and pools, one extra yard structure and one extra residential outbuilding. Acreage and improvements beyond that are taxed as residential property under the 2% cap.
That acre limit matters on the rural edges of Goshen, Nappanee and Plymouth, where a house on five acres will see part of its bill capped at 1% and the rest at 2%.
Two ways to file
Route one: the sales disclosure form at closing. Every Indiana sale requires a sales disclosure form (State Form 46021), reviewed by the county assessor and filed with the auditor along with a $20 fee. Under IC 6-1.1-12-44, if you mark the homestead section and the form is accurate, complete, approved by the assessor and filed with the auditor on time, it counts as your homestead application. Title companies often prepare it at the closing table. Read it before you sign, and make sure the homestead box is checked and the address is correct.
Route two: Form HC10. If the closing paperwork missed it, or you moved in after closing, file the Claim for Homestead Property Tax Standard / Supplemental Deduction — Form HC10, State Form 5473 — with the county auditor. One form covers both deductions; ask the auditor’s office how it prefers to receive it.
Building new? Buyers of a lot or an unfinished house are not shut out. The statute lets a homestead qualify for an assessment date even if the land was vacant or the dwelling incomplete on January 1, provided you file the statement or a qualifying sales disclosure form is submitted to the assessor by December 31 of the year you bought it — relevant to the new-construction subdivisions around Granger and Osceola.
The deadline, and which bill it lands on
Indiana taxes are paid a year behind. Property assessed as of January 1 is billed the following year, in two installments due May 10 and November 10 (IC 6-1.1-22-9). The homestead rule follows that calendar: the application must be completed and filed with the county auditor, and any recording requirement satisfied, on or before January 15 of the year the taxes are first due. The state’s own example: a homeowner who applies on or before January 15, 2026 sees the deduction on the 2025-pay-2026 bill.
Once it is on file, you do not reapply each year. You refile only if the property is sold or the title changes — such as deeding the house into a trust or adding a spouse, which is worth a call to the auditor.
The deductions are changing: the 2025 law
Senate Enrolled Act 1 of 2025 phases the flat standard deduction out and raises the supplemental percentage, according to the Department of Local Government Finance:
| Assessment date / pay year | Standard deduction | Supplemental rate |
|---|---|---|
| 2025 / pay 2026 | $48,000 | 40% |
| 2026 / pay 2027 | $40,000 | 46% |
| 2027 / pay 2028 | $30,000 | 52% |
| 2028 / pay 2029 | $20,000 | 57% |
| 2029 / pay 2030 | $10,000 | 62% |
| 2030 / pay 2031 onward | $0 | 66.7% |
The supplemental deduction is capped at 75% of gross assessed value. On a hypothetical $200,000 assessment, the pay-2026 arithmetic is $200,000 minus $48,000, then 40% of the remaining $152,000 off again, for a net taxable value of about $91,200. Your actual bill depends on your taxing district’s rate and on the caps, so get your own parcel’s numbers from the county rather than trusting a rule of thumb. Note that the standard deduction still matters after it reaches $0 — it remains the eligibility test for the supplemental deduction, the credit and the 1% cap.
If you miss January 15
A late filing does not disappear; it simply starts with the next cycle. The cost is one year of the bill without homestead treatment — no deductions, no credit, and a cap that can be twice as high. On a house near the Granger typical value of $425K through June 2026 (market report), that difference is not small. If you believe you filed and the auditor did not apply it, a claim that a deduction was wrongly denied or omitted can be raised through the assessment appeal process on Form 130 — see the property tax appeals guide. Ask the auditor first; filing errors are usually fixed at the counter.
Moving out, renting out, or buying a second house
The obligation runs both ways. Under IC 6-1.1-12-37(g), if you change the property’s use so it no longer qualifies — you move out and rent it, say — or you already hold a homestead elsewhere, you must notify the auditor within 60 days. 2026 legislation (HEA 1210) made the consequences mandatory: back taxes plus a 10% civil penalty for failing to notify, and an additional 10% fine, figured on the full bill without the deduction, when an auditor finds a homestead was claimed falsely within the prior three years. Landlords converting a former home — see selling with tenants — should file the change-of-use form the month they move.
How to check it on the county site
St. Joseph, Elkhart, LaPorte, Marshall and Kosciusko counties each publish parcel and tax records online. Pull your parcel, open the current tax statement or deduction detail, and look for the homestead standard and supplemental deductions as line items. On the tax statement, the cap section should reflect the 1% limit for the homestead portion. If either is missing, call the auditor’s office — the county auditor is the official the state names as the point of contact for deductions and eligibility. Over-65, disability and veterans’ benefits are separate applications with their own forms, filed with the same office.
Buying directly without a brokerage changes none of this; the title company still handles the sales disclosure form at a direct closing. MichianaRealty.com™ keeps the buy-direct steps and the first-year owner checklist together, and this filing belongs at the top of both. On the Michigan side the equivalent is a different document entirely: the principal residence exemption.
Frequently asked questions
How do I file for homestead deduction in Indiana?
Either mark the homestead section of the sales disclosure form at closing, which counts as your application once the assessor approves it and it is filed with the county auditor, or file Form HC10 (State Form 5473) with the auditor of the county where the home sits. One form covers both the standard and supplemental homestead deductions.
What is the deadline to file homestead exemption in Indiana?
The application must be filed with the county auditor on or before January 15 of the year the taxes are first due. Because Indiana bills a year behind, filing by January 15, 2026 put the deduction on the 2025-pay-2026 bill. Miss it and the deduction starts with the next cycle.
Do I have to reapply for the homestead deduction every year in Indiana?
No. Once it is on file it carries forward. You reapply only when the property is sold or the title changes. You must notify the auditor within 60 days if the home stops being your principal residence, or face back taxes and penalties.
Does the homestead deduction affect the 1% property tax cap?
Yes, directly. Under state guidance, a property must be receiving the homestead standard deduction to get the 1% circuit-breaker cap. Without it, an owner-occupied house is capped at 2% of gross assessed value like any other residential property.
Is the Indiana homestead deduction going away?
The flat standard deduction is phasing down under the 2025 law - $48,000 for the 2025 assessment, falling to $0 from the 2030 assessment - while the supplemental deduction rises from 40% to 66.7%. Qualifying for the standard deduction still controls eligibility for the supplemental deduction, the new homestead credit and the 1% cap, so filing still matters.