New Jersey (NJ) Self Employment Tax Calculator

New Jersey has seven income tax brackets ranging from 1.4% to 10.75% (for income over $1,000,000). For a single self-employed person at $80,000, the NJ marginal rate is 5.525%. New Jersey has no standard deduction, so your entire net profit (minus the deductible half of SE tax) is subject to NJ income tax from the first dollar. Source: New Jersey Division of Taxation.

No. New Jersey does not allow a standard deduction. NJ taxes gross income (with no standard deduction reduction), which means self-employed people in NJ pay state income tax on essentially their entire net profit after subtracting the deductible half of SE tax. This makes NJ's effective tax burden higher at lower income levels than states with standard deductions like CA or NY.

New Jersey's top marginal rate is 10.75% on income above $1,000,000. For single filers, the 6.37% bracket begins at $500,000. New Jersey raised rates for high earners in 2020, and the top rates have remained at these levels. NJ's top rate is the third highest in the US among the 11 states covered here, behind only California (13.3%) and New York (10.9%).

Self-employment (SE) tax is the Social Security and Medicare tax paid by freelancers, 1099 contractors, and sole proprietors. Employees split these costs with their employer (7.65% each); when you work for yourself you pay both halves — 15.3% total — on 92.35% of your net profit. It is separate from, and on top of, federal and state income tax.

Yes. In addition to federal SE tax, New Jersey taxes self-employment net profit as ordinary income. This calculator shows both: the federal SE tax (Social Security + Medicare) and the estimated New Jersey state income tax side by side, so you can see your true combined tax bill.

Yes — from federal income tax. You can deduct one half of your Social Security and Medicare SE tax as an above-the-line adjustment to income on Form 1040. This deductible half also reduces your federal AGI, which in turn reduces your state taxable income in most states (except Pennsylvania, which taxes gross compensation regardless).

SE tax is based on net profit (gross revenue minus business expenses), so every legitimate business deduction reduces both your SE tax and your state income tax. Common deductions include home-office use ($5/sqft simplified method), equipment and software (Section 179), business mileage, and professional services. The standard deduction and QBI deduction reduce income tax only — not SE tax.

SE tax is paid through quarterly estimated payments (Form 1040-ES), due April 15, June 16, September 15, and January 15 for the prior year's fourth quarter. If you expect to owe $1,000 or more in federal tax after withholding, you generally must pay quarterly to avoid the IRS underpayment penalty. Most states that tax SE income have parallel quarterly estimated payment requirements.