The Appeal Process and the April 1 Deadline

New Jersey’s appeal deadline is the strictest kind on this site: the petition must be filed and received by April 1 — the Division of Taxation’s own page states “filed and received,” so a petition mailed on March 31 and arriving April 2 is late. Two statewide variations and one direct route modify the rule, and each is stated on the same official page.

The filing, and its variants

• The form: Form A-1 (Petition of Appeal) with the Form A-1 Comp. Sale attachment — the comparable-sales schedule that comes with the petition, filed with the County Board of Taxation for the county where the property sits.
• April 1: the standard deadline, for the October 1 Grand List of the prior year.
• May 1: where the municipality undertook a revaluation or reassessment — a month longer to react to a whole-town change in values.
• January 15: in Burlington, Gloucester and Monmouth Counties, which follow an alternative assessment calendar (their hearings run correspondingly earlier).
• Direct to the Tax Court: where the assessment exceeds $1,000,000, the petition may be filed directly with the Tax Court of New Jersey instead of the county board.

The burden of proof

The taxpayer appealing carries the burden: you must prove the assessment does not fairly represent the True Market Value Standard or the Common Level Range Standard — the Chapter 123 band being the second route. In practice, a complete petition pairs the Comp. Sale schedule (comparable sales) with a ratio computation against the certified average — either can win, and together they cover both standards.

Added and omitted assessments

Improvements made after October 1 — or property the assessor missed — enter the roll later as an added or omitted assessment, with its own appeal form (Form AA-1) and its own later deadline, typically December 1. One caveat this site records honestly: no official page readable in preparing that date states it — it is corroborated by county and assessor sources — so confirm the current-year deadline with your county board. Where the added/omitted aggregate exceeds $750,000, the appeal may go directly to the Tax Court.

After the county board: 45 days to the Tax Court

A County Board of Taxation judgment can be appealed to the Tax Court of New Jersey within 45 days of the judgment’s date. From there, review is judicial — the Appellate Division and, in vetted cases, the Supreme Court. The county-board level is where most residential cases end, which makes the April 1 filing the decision that matters most.

Worked example (illustrative)

Illustrative timeline with made-up figures — your county’s calendar and your own notice control.

1. October 1, 2025: the valuation date for tax year 2026; your assessment is set.
2. February 2026: assessment notices / postcards confirm the assessment; you compute your ratio — Chapter 123 screen — and it sits above the band.
3. By March 15, 2026: comparable sales gathered for the A-1 Comp. Sale schedule; petition completed.
4. March 25, 2026: filed — received by the county board, well inside April 1.
5. May–July 2026: county board hearing; judgment issued June 30 reducing the assessment into the range.
6. By August 14, 2026: the 45-day Tax Court window closes — unused, because the judgment sufficed.

What this tells you: the entire New Jersey appeal year compresses into the first half of the calendar — file by April, hear by summer, and the 45-day window closes in August. Everything else (the bill, the payment) arrives after the appeal window is already shut.

What this page does not cover

County board hearing procedures (each board publishes its own rules), farmland assessment appeals, and Tax Court practice are outside this page. The Division’s Assessment and Appeals page cited below is the authority for the deadlines and thresholds.