2026 fiscal calendar
Know the tax date before it becomes a penalty date.
Tax bills, payment rules, and valuation-review windows are controlled by the local jurisdiction and the governing state framework. The verified record below separates published figures from dates that require confirmation with Darke County Auditor (Carol Ginn) / Darke County Treasurer (Scott J. Zumbrink).
Effective rate
no single countywide effective average published; Ohio property-tax rates vary by tax district, school district, municipality, and voted levies.
Statement mailing
official Darke County FAQ says bills are issued in June/July and January/February but does not publish exact 2026 mailing dates.
Payment deadline
2025 real-estate taxes payable in 2026: second half due August 14, 2026; the current official notice reviewed did not publish the exact first-half 2026 closing date.
Valuation protest
January 1–March 31, 2026 for the 2025 tax year under Ohio Revised Code §5715.19; file the DTE 1 complaint with the Darke County Board of Revision through the Auditor.
Critical payment warning
Do not assume a grace period.
The verified county record identifies the payment timing above but does not establish a universal penalty schedule for this page. Late charges, interest, collection costs, tax-sale procedures, and lien or foreclosure timelines can depend on state law and the local collector’s process. If the deadline is close or a balance is delinquent, contact the tax collector directly and request the current payoff amount in writing.
Treat the published payment deadline as a hard operational date and retain your receipt or confirmation number.
Read the calendar in order
From assessment to collection
1. Valuation and notice
Review the assessment notice as soon as it arrives. The protest window may run from the notice date rather than from the payment due date.
2. Statement and account review
Match the tax statement to the parcel or account number and confirm exemptions, assessed value, taxing units, credits, and balance.
3. Payment confirmation
Use the official collector channel, then save the receipt, transaction reference, and date posted. A bank submission is not always the same as a county posting date.