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New Hampshire Self-Employment Tax Calculator 2025 — Federal SE Tax, No State Income Tax

See your self-employment tax in New Hampshire: federal 15.3% (Social Security + Medicare) on your profit — New Hampshire has no state income tax. Instant, in your browser.

Free New Hampshire self-employment tax calculator for 2025. New Hampshire has no individual income tax, so a 1099 contractor or sole proprietor owes only the federal SE tax: 12.4% Social Security up to the $176,100 wage base + 2.9% Medicare on 92.35% of net profit (the 15.3% combined rate), plus the 0.9% Additional Medicare surtax above the threshold. Shows the deductible half and a QBI note. Runs entirely in your browser; no data sent to any server. It runs free in your browser on Gera Tools, with nothing uploaded.

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Does New Hampshire have a state self-employment or income tax?

No. New Hampshire never taxed earned wages; its remaining interest-and-dividends tax was fully repealed effective 2025, so there is no state income tax on self-employment profit. The only tax this calculator computes on your business profit is the federal self-employment tax (Social Security + Medicare). You may still owe federal income tax, which is calculated separately.

New Hampshire Self-Employment Tax Calculator 2025

If you are a freelancer, 1099 contractor, gig worker, or sole proprietor in New Hampshire, you pay self-employment (SE) tax — your share of Social Security and Medicare, reported on Schedule SE. Because New Hampshire has no individual income tax, the SE tax is the only tax you owe on your business profit at the federal-plus-state level for this calculation (federal income tax is still separate). New Hampshire never taxed earned wages; its remaining interest-and-dividends tax was fully repealed effective 2025, so there is no state income tax on self-employment profit.

Enter your net profit below. The calculator applies the IRS net-earnings factor and the 2025 rates, shows the half you can deduct, and adds a Qualified Business Income (QBI) note.

How the 2025 federal SE tax works

  1. Net earnings = net profit × 92.35% (the 0.9235 Schedule SE factor). No SE tax is due if this is under $400.
  2. Social Security = 12.4% on net earnings up to the $176,100 2025 wage base.
  3. Medicare = 2.9% on all net earnings — no cap.
  4. Additional Medicare = 0.9% on combined wages above $200,000 (single) / $250,000 (married filing jointly).
  5. The base 12.4% + 2.9% = 15.3% combined rate is the headline figure. You may deduct one-half of the SE tax as an above-the-line adjustment on your federal return.

Worked example (New Hampshire, $80,000 net profit, 2025): net earnings $73,880.00 → Social Security $9,161.12 + Medicare $2,142.52 = $11,303.64 SE tax, with $5,651.82 deductible. New Hampshire state income tax on that profit: $0.

QBI deduction (separate from SE tax)

You may also qualify for the Qualified Business Income (QBI / §199A) deduction — up to 20% of your business profit — but it reduces your income tax, not your self-employment tax. For 2025 the full 20% applies without wage/property limits when taxable income (before the deduction) is at or below $197,300 (single) or $394,600 (married filing jointly).

Sources: federal rates — IRS Self-Employment Tax & Schedule SE (2025); $176,100 wage base — SSA Contribution and Benefit Base (2025); QBI — IRS Instructions for Form 8995 (2025). No-state-income-tax status — Tax Foundation, 2025 State Individual Income Tax Rates (NH I&D tax repealed 2025). Verify with the New Hampshire Department of Revenue Administration. Estimate only, not tax advice.