Mercer County, New Jersey property-tax payment and appeal deadlines
Tax bills, payment rules, and valuation-review windows are controlled by the local jurisdiction and the governing state framework. The reviewed record below separates published figures from items that still require confirmation with Mercer County Board of Taxation.
Rate context
ConfirmNew Jersey property-tax rates vary by municipality and taxing district; no single countywide effective rate is published.
Statement mailing
PublishedAssessment notice postcards are mailed at the end of January each year; the municipal tax collector controls the separate 2026 tax-bill mailing date.
Payment deadline
Published2026 municipal property taxes are generally collected locally in four installments due February 1, May 1, August 1, and November 1; the municipal tax collector's bill and any statutory grace period control.
Valuation protest
PublishedThe 2026 appeal deadline is Wednesday, April 1, 2026; appeals are accepted between 8:30 a.m. and 4:00 p.m. The municipal-wide revaluation/reassessment May 1 rule also applies where applicable.
Do not assume a grace period.
The reviewed 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 a published payment deadline as a hard operational date and retain your receipt or confirmation number.
From assessment to collection
01Valuation 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.
02Statement and account review
Match the tax statement to the parcel or account number and confirm exemptions, assessed value, taxing units, credits, and balance.
03Payment 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.