New Hampshire Self-Employment Tax Calculator 2025

Self-employed individuals in New Hampshire pay the same federal self-employment tax as workers in every other state: 12.4% for Social Security (on the first $176,100 of net earnings in 2025) and 2.9% for Medicare, totaling 15.3%. This is calculated on 92.35% of your net self-employment income. An additional 0.9% Medicare tax applies to earnings above $200,000 ($250,000 married filing jointly).

Because New Hampshire has no state income tax, self-employed residents keep more of their earnings compared to states with income taxes. Your total tax burden consists of federal income tax and the 15.3% SE tax. You can deduct half of your SE tax as an above-the-line deduction on your federal return.

Remember to make quarterly estimated tax payments (due January 15, April 15, June 15, and September 15) to avoid underpayment penalties. The calculator above breaks down your quarterly payment amounts.