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 Sullivan County Assessment Office.
Effective rate
2026 millage multipliers vary by municipality and taxing district; the official county assessment page links the millage multipliers updated June 17, 2026.
Statement mailing
the official 2026 county source publishes a millage-multiplier schedule and tax-collector list but no uniform countywide bill-mailing date.
Payment deadline
current-year taxes are administered by local tax collectors; the official county source publishes 2026 collector information and current/delinquent payment portals but no uniform countywide discount or due-date schedule. The 2026 delinquent tax sale is scheduled for September 14, 2026.
Valuation protest
the official assessment page publishes an annual appeal form and a 40-day change-of-assessment form, but does not publish a single 2026 annual filing date; change notices use the 40-day period.
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.