NJ Property Tax Appeal Deadline: April 1, May 1, and How to File on Time
The dates, the fees, what you have to prove, and the extra rules for commercial owners.
7 min read · Updated Oct 2026
Your assessment notice arrives in the mail, and the number looks high. In New Jersey, you can't appeal the tax bill, only the assessment behind it, and the window is short: miss the NJ property tax appeal deadline and you generally wait a year. This guide covers the exact deadlines, the filing fees, what you have to prove, and the extra rules for commercial and investment owners.
Wondering what your property is actually worth? · Prefer to talk? Call or text .
Key takeaways
- Appeals must be received, not postmarked, by April 1 (or 45 days after notices are mailed, if later), or by May 1 in a town that just completed a revaluation or reassessment.
- You carry the burden: show that your assessment is unreasonable compared with market value as of the prior October 1.
- Commercial owners: answer any "Chapter 91" income request within 45 days, or you can lose the right to appeal.
On this page
The deadlines
Per the NJ Division of Taxation and the instructions on the state's appeal form (Form A-1) [1][2]:
- April 1 of the tax year, or 45 days after your town finishes mailing assessment notices, whichever is later. This is the normal deadline.
- May 1 if your town implemented a municipal-wide revaluation or reassessment.
- 45 days from a Notification of Change of Assessment.
- If the last day falls on a Saturday, Sunday, or legal holiday, it moves to the next business day.
Two details catch people:
1. "Received," not "postmarked." The appeal must be in the county board's hands by the deadline. An appeal received after close of business on the deadline date is untimely [2].
2. Burlington, Gloucester, and Monmouth use January 15 (or 45 days after notices, whichever is later) [2]. None are in Northern NJ, but if you own property there, check those boards directly.
What this means for 2027
April 1, 2027 is a Thursday. May 1, 2027 is a Saturday, so under the weekend rule a revaluation-town deadline would roll to the next business day. Your county board posts the dates. Bergen County's board, for example, posts a notice when each year's deadline has passed [5].
Where your assessment comes from
Your assessor must mail a notice of the current assessment by February 1 [4]. Read it the day it arrives.
The assessment reflects value as of October 1 of the prior year, the assessment date. Your evidence, especially sales of similar properties, should be from on or near that date [3].
What you have to prove
The burden is on you: show that your assessment is unreasonable compared with market value [1]. Two standards apply [3]:
- True market value. In a revaluation year, assessments should be at 100% of market value.
- Common level range. In other years, each town has an average ratio of assessments to market value. Bergen County's FAQ explains that if your assessment-to-value ratio exceeds the average ratio by more than 15%, it's reduced to the common level; inside that range, no adjustment is made [6]. The same FAQ suggests asking for your town's average ratio before you file.
Good evidence is factual: recent comparable sales, photos, and documented problems with the property. If you rely on an appraisal, Bergen County says copies must be delivered at least 7 days before the hearing, and the appraiser must be available to testify [6].
One more thing: the petition itself asks the board for a judgment "reducing/increasing" the assessment to the correct value [2]. Make sure your evidence supports a lower number before you file.
Is the assessment a sign to rethink the property? Share the type, town, size, and your goal, and request a confidential callback about value, keeping, or selling. GROFINEX doesn't file tax appeals; for an appeal, contact your county board or an attorney. · Prefer to talk? Call or text .
Filing fees
County board filing fees from Form A-1 [2]:
| Assessed value | Fee |
|---|---|
| Under $150,000 | $5 |
| $150,000 to under $500,000 | $25 |
| $500,000 to under $1,000,000 | $100 |
| $1,000,000 or more | $150 |
Extra rules for commercial and investment owners
Over $1 million? You can go straight to Tax Court
If your assessment is more than $1,000,000, you may file directly with the Tax Court of New Jersey by the same deadline. Otherwise, a county board judgment can be appealed to Tax Court within 45 days [1].
Who can file
The state's online filing system accepts filings from the property owner or a New Jersey attorney. It says a business entity other than a sole proprietor must be represented by an attorney (the system also lists business entities with prior-year taxes under $25,000 as a filing status). Appeals filed by "service providers" such as Realtors and appraisers are returned for lack of standing [7]. If an LLC owns your building, plan on an attorney.
Don't ignore a "Chapter 91" letter
Assessors can send owners of income-producing property a written request for income information (N.J.S.A. 54:4-34, known as Chapter 91). If you don't respond within 45 days, the statute says the assessor may value the property from the information available, and no appeal shall be heard from that assessment. The Tax Court quotes and explains this in H&R Management Associates v. Raritan (2025) [8]. If you own a rented building, answer these letters on time.
A simple timeline
1. October 1: the assessment date for next year's value.
2. By February 1: your assessment notice arrives.
3. February to March: gather comparable sales near October 1, photos, and your town's average ratio. Decide whether to file.
4. By April 1 (or May 1 after a revaluation): your appeal must be received. Bergen County urges online filing [5].
5. After the deadline: county board hearings are generally held within about three months [3].
Use this year's notice as a checkpoint. Find out what your property is worth today, and whether it still fits your plans. · Prefer to talk? Call or text . Commercial owners can also start from the .
Sources
- NJ Division of Taxation, Assessment and Appeals. April 1 / May 1; burden of proof; direct Tax Court filing over $1M; 45 days to Tax Court after a county judgment.
- NJ Division of Taxation, Form A-1 Petition of Appeal and instructions. received not postmarked; the 45-day alternatives; weekend/holiday rule; the Burlington/Monmouth/Gloucester January 15 rule; fees; "reducing/increasing".
- NJ Division of Taxation, A Guide to Tax Appeal Hearings. October 1 assessment date; true market value and common level standards; hearings within about 3 months.
- NJ Division of Taxation, Tax calendar for assessors, county boards, and collectors. assessment notices by February 1.
- Bergen County, About Board of Taxation. deadline-passed notice; urges online filing.
- Bergen County, Tax Appeals FAQ. the 15% common level rule; the 7-day appraisal delivery and appraiser testimony.
- NJ Appeal Filing System, Registration. owner or NJ attorney; business entities and attorneys; service providers returned for lack of standing.
- Tax Court of New Jersey, H&R Management Associates v. Township of Raritan (2025). the Chapter 91 45-day response rule and the bar on appeal.
Related
General information, not legal, tax, or financial advice.