New Jersey tax deadlines in 2026: filing dates and estimated payments
Deadlines that fall in calendar 2026: the 2025 return and the 2026 estimated payments. Different year? See New Jersey 2025 →
New Jersey deadlines in 2026
| 2025 individual return due | April 15, 2026 |
|---|---|
| Extended filing deadline | October 15, 2026 |
| Payment due | April 15, 2026, extension or not |
| Final 2025 estimated payment | January 15, 2026 |
| 2026 estimated payments | April 15, 2026 · June 15, 2026 · September 15, 2026 · January 15, 2027 |
Conforms to the federal deadline.
New Jersey estimated tax payments in 2026
Resident or nonresident individuals must make estimated payments if they estimate they will owe more than $400 in New Jersey Income Tax after withholdings and other credits.
| Q1 (2026 tax year) | April 15, 2026 |
|---|---|
| Q2 (2026 tax year) | June 15, 2026 |
| Q3 (2026 tax year) | September 15, 2026 |
| Q4 (2026 tax year) | January 15, 2027 |
| Voucher | Form NJ-1040-ES, Declaration of Estimated Tax |
| Underpayment safe harbor | Underpayment interest is not charged if you paid, through withholding and timely estimated payments, at least 80% of the current year's tax (66 2/3% for farmers) or 100% of the prior full-year New Jersey tax. |
| Pay online | www1.state.nj.us |
Taxpayers with gross income at or below the filing threshold ($20,000 joint or head of household; $10,000 single or married filing separately) need not make estimated payments. Farmers may pay in full by January 15, 2027.
Source: nj.gov and nj.gov, read September 3, 2026. “You can pay in full on or before April 15, 2026, or in four equal installments. If you are paying your estimated tax in four equal installments, additional payments must be made on or before June 15, 2026, September 15, 2026, and January 15, 2027.”
All 51 jurisdictions in one table: state estimated tax payment dates for 2026.
New Jersey extensions
Every state's rule in one table: which states accept the federal extension in 2026.
| Does New Jersey accept the federal extension? | Only in some cases. See the rule below. |
|---|---|
| State extension form | Form NJ-630 |
| Original due date | April 15, 2026 |
| Extended due date | October 15, 2026 |
| Payment | Still due April 15, 2026. The extension is to file, not to pay. At least 80% of the final tax must be paid by April 15, 2026 or the extension is retroactively denied and penalty and interest run from the original due date. |
| How to get it | No NJ-630 is needed if 80% of the tax is paid by April 15 and you applied for a federal extension (enclose a copy of the federal application with a paper return); otherwise file NJ-630 online at nj.gov/taxation or by mail with payment by April 15, 2026. |
Source: nj.gov, read September 3, 2026. “You do not need to submit this NJ-630 application if: 1. You have paid at least 80% of your final tax liability by the original due date; and 2. You have applied for an automatic extension of time to file for federal purposes”
Federal deadlines in 2026
| 2025 Form 1040 | April 15, 2026 · extension October 15, 2026 |
|---|---|
| 2025 S-corp (1120-S) & partnership (1065) | March 16, 2026 |
| 2025 C-corp (Form 1120) | April 15, 2026 |
| 2026 federal estimated payments (1040-ES) | April 15, 2026 · June 15, 2026 · September 15, 2026 · January 15, 2027 |
Source: IRS Publication 509 and Form 1040-ES instructions, irs.gov.
Frequently asked questions
When are New Jersey state taxes due in 2026?
Your 2025 New Jersey individual income tax return is due April 15, 2026. If that date falls on a weekend or legal holiday, the deadline moves to the next business day. An extension moves the filing deadline to October 15, 2026, but any tax owed is still due on the original date.
When are New Jersey estimated tax payments due in 2026?
New Jersey estimated payments for the 2026 tax year are due April 15, 2026, June 15, 2026, September 15, 2026, January 15, 2027. Use Form NJ-1040-ES, Declaration of Estimated Tax or pay online. The final installment for 2025 was due January 15, 2026.
Does New Jersey accept the federal extension?
Only in some cases. See the rule below. The state form is Form NJ-630. The extended filing deadline is October 15, 2026, and tax is still due by April 15, 2026.
Does a New Jersey extension give me more time to pay?
No. An extension extends the time to file, not to pay. To avoid penalties and interest, pay what you expect to owe by April 15, 2026.
Dates are the statutory deadlines that fall in 2026 and move to the next business day when they land on a weekend or holiday. Each section links to the source it was checked against. Always confirm with the New Jersey tax agency or the IRS before relying on a date. This is general information, not tax advice.