Updated: October 21, 2026 · By Mark Dietel, Broker/Owner, Mark Dietel Realty · 6-minute read
Quick answer: Usually because the seller's homestead deductions did not carry over to you. In Indiana, deductions belong to the owner who lives there and must be re-established after a sale. Until you file, more of the home's value is taxed and the cap on the bill moves from 1% to 2%. Mark Dietel Realty checks this with Southside and Greenwood buyers.
What we analyzed: Indiana Department of Local Government Finance (DLGF) guidance and its May 27, 2026 memo on deductions, the DLGF circuit-breaker fact sheet, Indiana Code 6-1.1-12, and the Indiana REALTORS Housing Hub Johnson County report for August 2026.
Key takeaways
- The DLGF says deductions need a new application when a property is sold or the title changes. They are not a permanent feature of the house.
- Homestead status also sets the cap on your bill: 1% of gross assessed value with it, 2% without it.
- Indiana bills a year behind, so the jump often shows up a year or more after closing, usually as an escrow shortage letter.
- Senate Enrolled Act 1 (2025) is shrinking the standard deduction and raising the supplemental one each year, so check the amounts for your bill year.
Why did the tax bill jump after you bought the house?
The bill running at your closing was built on the seller's status: their deductions and their assessment history. Indiana bills a year behind, so that math keeps running for a while after the sale. When county records catch up and the seller's deductions come off, the taxed value rises and the bill follows.
The DLGF is direct about the trigger: reapplication is needed when the property is sold or the title changes. If no new homestead application is on file after your closing, the county taxes the home in the non-homestead category, the same as a rental, even though you live there. In our experience with buyers on the Southside and in Johnson County, this tends to surface with the first bill computed fully under the new owner.
What happens to the seller's homestead deduction after closing?
It ends with their ownership. The seller claims a homestead wherever they live next. Your house regains homestead status only when you establish it, either through the sales disclosure form at closing where Indiana Code 6-1.1-12-44 allows, or by filing State Form 5473 with the county auditor.
No one has a legal duty to do this for you, and a missed filing stays invisible until the bill arrives. A few minutes on your county's online property record settles it: the homestead deductions should be listed under your name. Our step-by-step guide, How to File the Homestead Deduction in Marion or Johnson County, walks through the filing.
How much difference does homestead status make?
A lot. On a mid-priced home, homestead status means roughly half the value is taxed instead of all of it, and the bill is capped at half the level. The table uses a hypothetical home priced at Johnson County's August 2026 median sale price from the Indiana REALTORS Housing Data Hub, with the deduction amounts for taxes payable in 2026.
How much difference does homestead status make?
| Line (hypothetical $330,000 Greenwood home) | Homestead on file | No homestead on file |
|---|---|---|
| Gross assessed value | $330,000 | $330,000 |
| Standard deduction (2025 assessment, taxes payable 2026) | − $48,000 | $0 |
| Supplemental deduction (40% of the $282,000 that remains) | − $112,800 | $0 |
| Net assessed value that gets taxed | $169,200 | $330,000 |
| Constitutional cap on the bill | 1% = $3,300 | 2% = $6,600 |
| SEA 1 homestead credit (2026 bills) | 10% of the bill, up to $300 | not eligible |
For taxes payable in 2027, the DLGF memo lists a $40,000 standard deduction (2026 assessment date) and a 46% supplemental deduction, so the exact lines shift each year. Your real bill also depends on your taxing district's rate, and voter-approved referendum levies are collected outside the caps.
Why did your monthly mortgage payment change too?
Your lender pays the tax bill from escrow and reviews the account once a year. When the real bill comes in higher than the estimate, the review finds a shortage. The lender then raises your monthly payment to repay the shortage and cover the higher bill going forward.
That is why the problem feels like a mortgage increase. The fix runs through the county, not the lender. Restore the homestead status, and once a corrected bill cycle comes through, the escrow review adjusts. Ask the county auditor whether a correction or refund is available for bills already paid.
What does this look like in Central Indiana?
A hypothetical: a couple buys a home in Greenwood in October. Their first spring bill still reflects the seller's homestead, so nothing looks wrong. The next year, the first bill computed under their ownership arrives with no deductions on file. The home is taxed on its full assessed value under the 2% cap instead of the homestead math in the table. Their servicer's escrow review lands a month later with a shortage and a higher payment. One filing with the Johnson County Auditor, and a corrected homestead status, walks the chain back. The same pattern plays out in Marion and Monroe Counties; only the district rates differ.
When this doesn't apply
Sometimes the jump is real and homestead status is not the cause. A school referendum adds a levy outside the caps. The assessment itself may have risen; compare your Form 11 notice year over year. New construction bills climb as improvements are assessed for the first time. If you bought the home as a rental or second home, the 2% category is correct and there is nothing to restore. This article does not cover the over-65, veteran or other special deductions, which have their own rules.
What to do next
Pull your county property record today and check two lines: the deductions listed, and the name they are listed under. If the homestead is missing, file it with your county auditor. If you are still house-hunting, make the tax record part of how you compare homes. Questions about a specific home? Call or text Mark Dietel Realty at (317) 426-9911. We have offices in Southside Indianapolis, Greenwood and Bloomington.
Read next: How Do Property Taxes Work When You Buy a House in Indiana? · How to File the Homestead Deduction in Marion or Johnson County · What Are the Steps to Buying a House in Indiana?
Frequently asked questions
Can I get money back for years I qualified but never filed?
Ask your county auditor. Correction and refund practices vary by county and situation, and some relief only runs forward from the date you file. Bring your closing documents and proof the home has been your main residence, and ask for the auditor's answer in writing either way.
Does the assessor raise my value because I paid more than the old assessment?
Your sale does not automatically reset the assessed value to your price. Indiana updates values each year through trending based on area sales, and your sale becomes one of those. If the new Form 11 looks out of line with what similar homes sell for, use the appeal process the notice describes.
My neighbor's house is just like mine but their bill is lower. Why?
Common reasons include a different deduction status, an over-65 or veteran deduction you cannot see from the street, or a different taxing district across a township or school boundary. Compare the two property records line by line on the county site before assuming there is an error.
I escrow. Do I need to do anything with the actual tax bill?
Yes, read it. The lender pays it, but only you will notice a missing homestead deduction, a wrong name, or a value worth appealing. Check the county record once a year, ideally before the spring installment is due, so problems get fixed before escrow absorbs them.
How do I find my taxing district's rate?
The DLGF certifies every district's rate each year, and your county bill shows the rate applied to your parcel. Rates differ across county, township, city, school and library lines, which is why two similar homes a mile apart can owe different amounts.
This is general information, not legal, tax or appraisal advice. Confirm your situation with the Marion or Johnson County Assessor, a CPA or an attorney. Deduction amounts change each year under SEA 1-2025.
Mark Dietel Realty — offices in Indianapolis (Southside), Greenwood and Bloomington, Indiana.
Sources
- DLGF, Deductions and Credits (reapplication on sale or title change): https://www.in.gov/dlgf/deductions-and-credits/
- DLGF, Legislation Affecting Deductions, Credits, and Exemptions (May 27, 2026): https://www.in.gov/dlgf/files/2026-memos/260527-Cockerill-Memo-Legislation-Affecting-Deductions,-Credits,-and-Exemptions.pdf
- DLGF, Circuit Breaker Caps fact sheet: https://www.in.gov/dlgf/files/240429-Fact-Sheet-Circuit-Breaker-Caps.pdf
- Purdue Extension, Property Tax Reform: Phasing Out, Phasing In (September 2025; SEA 1 homestead credit): https://extension.purdue.edu/news/2025/09/property-tax-reform-phasing-out-phasing-in.html
- Indiana Code 6-1.1-12-37, 6-1.1-12-37.5, 6-1.1-12-44: https://iga.in.gov/laws/2025/ic/titles/6
- Indiana REALTORS Housing Hub, Johnson County, August 2026: https://data.indianarealtors.com/viewreport/2/all/18081/
