Boone County, IN property tax deadlines
5 coming property tax dates for Boone County, Indiana. Each one links to its official source and shows the day LevyDay last checked it.
| Next dates | Bills due | Last day without penalty | Appeal by | Exemption filing |
|---|---|---|---|---|
| Boone | Nov 10, 2026in.govOct 21 | Not on file | Jun 15, 2027in.govOct 21 | Jan 15, 2027in.govOct 21 |
Deadlines in date order
| Date and source | Deadline |
|---|---|
| January 15 every yearin.govOct 21 | Exemption filing File homestead and other deductions File with the county auditor. File by January 15 and it counts on that year's bill (by January 15, 2026 for 2025 taxes paid in 2026). |
| May 10 every yearin.govOct 21 | Bills due Spring installment, last day without a penalty If May 10 is a weekend or holiday, it's the next business day (May 11 in 2026). Pay up to 30 days late and the penalty is 5% if no back taxes are owed on the property. Otherwise it's 10%. |
| June 15 every yearin.govOct 21 | Appeal deadline Appeal your assessment on Form 130 If the Form 11 assessment notice was mailed before May 1, file by June 15 of the assessment year. If it was mailed May 1 or later, file by June 15 of the year the taxes are due. For personal property, you get 45 days after the notice is mailed. |
| November 10 every yearin.govOct 21 | Bills due Fall installment, last day without a penalty A weekend or holiday moves it to the next working day. Pay up to 30 days late and the penalty is 5% if no back taxes are owed on the property. Otherwise it's 10%. |
| November 10, 2026 2026 onlyin.govOct 21 | Bills due Fall 2026 installment (2025 taxes) Pay up to 30 days late and the penalty is 5% if no back taxes are owed on the property. Otherwise it's 10%. |
Appealing your assessed value
Appeal by Jun 15, 2027 in 235 daysin.govOct 21
If you think the county valued your home too high, you can appeal. Filing with the county is free and you can do it yourself.
Get help filing an appeal
After you send your details, we look for an independent appeal firm or attorney to take your case. We'll be in touch once one has agreed. Firms usually charge a share of what you save, and the one that takes it may pay LevyDay a referral fee.
LevyDay doesn't file appeals or give legal or tax advice. We only pass your details on. The independent firm or attorney that takes your case does the work and sets its own fee.
Get help filing an appealPlaces in Boone County
They are: Advance, Jamestown, Lebanon, Thorntown, Ulen, Whitestown, Zionsville. Every place in the county gets the dates above.
Nearby in the Indiana list
AdamsAllenBartholomewBentonBlackfordBrownCarrollCassClarkClayClinton