New Jersey tax guide

New Jersey taxes for self-employed workers in 2026

New Jersey's threshold for estimated payments is low, so many self-employed people need to make them. Here's what to know for 2026.

Published by Cadus Labs LLC · Last updated November 9, 2026 · How we write these guides

Based on the 2026 Form NJ-1040-ES and New Jersey Division of Taxation guidance.

New Jersey estimated tax payments for 2026

Residents and nonresidents have to make estimated payments if they expect to owe more than $400 in New Jersey income tax after withholdings and credits.

The form is Form NJ-1040-ES, and you can generally pay online instead of mailing it.

2026 New Jersey estimated tax payment dates for calendar-year filers
Payment due	Share of the year's required payment
April 15, 2026	25%
June 15, 2026	25%
September 15, 2026	25%
January 15, 2027	25%

You can also pay in full by April 15, 2026. If a date falls on a weekend or holiday, the payment is due the next business day.

How to avoid underpayment interest

New Jersey may charge interest if you don't pay at least 80% of your tax during the year and your total tax is more than $400 after credits. The state's GIT-8 guide lists the exceptions, and estimated payments are not a payment plan for tax you already owe.

Your federal tax comes first

Wherever you live, self-employed income is subject to federal income tax and self-employment tax. A single filer with $60,000 of net profit and no other income owes about $12,037 in federal tax for 2026, or 20% of profit, before any state or local tax.

Federal estimated payments are due April 15, June 15, and September 15, 2026, and January 15, 2027. Use our 1099 tax calculator to run your own numbers.

Recordkeeping checklist

Set aside for federal and state tax from every payment you receive.

Make federal and state estimated payments if you expect to owe enough.

Keep receipts and a mileage log for everything you deduct.

Check that your New Jersey payments reach 80% of the year's tax.

Free tools for this

Calculator

1099 and Self-Employment Tax Calculator

Enter your 1099 income and business expenses to estimate self-employment tax, federal income tax, and what to set aside each quarter. No sign-up, and nothing you type is saved.

Calculator

Quarterly Tax Set-Aside Calculator

Turn expected profit into a practical tax savings target, then use Cadus to keep income, expenses, deductions, receipts, and reports organized.

Template

Quarterly Tax Savings Worksheet

Use this worksheet to turn expected monthly profit into a practical tax savings target before estimated tax due dates arrive.

Template

Business Expense Log Template

Copy this table to start organizing business purchases, receipt proof, categories, and business purpose before moving records into Cadus.

Official sources

NJ Taxation: estimated payments NJ Taxation: GIT-8, estimating income taxes NJ Taxation: 2026 Form NJ-1040-ES

Related guides

Self-employment tax guide

Self-Employment Tax

The self-employment tax rate is 15.3%. See who pays, how the 2026 wage base works, the deduction for half the tax, and a worked example.

Estimated tax guide

Quarterly Estimated Taxes

2026 estimated tax due dates, who has to pay, how to avoid the penalty, and a worked example for a self-employed worker earning $60,000.

Schedule C education

Schedule C Expense Categories

Every Schedule C expense line in plain English: what goes on each one, what doesn't, and the records to keep for self-employed workers.

New Jersey Taxes FAQ

When do I have to pay New Jersey estimated tax?

When you expect to owe more than $400 in New Jersey income tax after withholdings and credits.

When are New Jersey estimated payments due in 2026?

April 15, June 15, and September 15, 2026, and January 15, 2027.

Cadus educational content is not tax, legal, or accounting advice. Tax rules can change, and individual facts matter. Review official guidance or speak with a qualified tax professional before filing.