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How Self-Employment Tax Works in North Carolina (2026)
Self-employment tax is 15.3% — 12.4% Social Security plus 2.9% Medicare — applied to 92.35% of your net self-employment income, on top of federal and North Carolina income tax. Half of the SE tax (7.65% equivalent) is an above-the-line deduction against your federal taxable income.
| Piece | Rate / rule |
|---|---|
| Net earnings subject to SE tax | 92.35% of net profit |
| Social Security portion | 12.4% (up to $184,500 of net earnings) |
| Medicare portion | 2.9% · +0.9% above $200,000 |
| Deductible half of SE tax | 50%, above-the-line on your federal return |
Estimated payments are due quarterly (roughly mid-April, mid-June, mid-September, and mid-January). The 20% Qualified Business Income deduction (§199A) is not modeled here — it depends on your income level and business type. If you also have W-2 wages, the Social Security cap is measured against your combined earnings, so this estimate runs high.
North Carolina Self-Employment Tax by Income (2026)
Single filer, 1099 income is the only earnings for the year. The quarterly figure is an even 4-way split of the annual total.
| Net 1099 income | SE tax | Federal tax | North Carolina tax | Quarterly payment |
|---|---|---|---|---|
| $20,000 | $2,826 | $249 | $233 | $827 |
| $40,000 | $5,652 | $2,281 | $975 | $2,227 |
| $60,000 | $8,478 | $4,511 | $1,716 | $3,676 |
| $80,000 | $11,304 | $7,527 | $2,458 | $5,322 |
| $100,000 | $14,130 | $11,616 | $3,199 | $7,236 |
North Carolina Self-Employment Tax FAQ
How much is self-employment tax in North Carolina?
15.3% federal SE tax on 92.35% of net profit (12.4% Social Security up to $184,500, 2.9% Medicare), plus North Carolina's flat 3.99% income tax on net profit, plus federal income tax. Half the SE tax is deductible federally.
Do North Carolina freelancers pay quarterly estimated taxes?
Yes - federal estimates if you will owe $1,000 or more, and North Carolina estimates once your unpaid state tax passes its threshold (check the NC Department of Revenue), on the standard quarterly schedule.
Does North Carolina follow the federal QBI deduction?
No. North Carolina requires adding the federal 20% QBI deduction back, so your full net profit is taxed at 3.99% for state purposes. QBI is not modeled in this calculator.
Methodology & Source
North Carolina state tax figures sourced from North Carolina Department of Revenue (https://www.ncdor.gov/taxes-forms/individual-income-tax/tax-rate-schedules), citing Session Law 2023-134 — phased-down flat rate, 3.99% for taxable years after 2025. Federal brackets, standard deductions (single/MFJ/HoH), and FICA constants sourced from the IRS (Revenue Procedure 2025-32; married-filing-jointly Additional Medicare threshold of $250,000 is a separate, unindexed statutory figure). North Carolina's married-filing-jointly and head-of-household figures have been independently verified against the source above.
Self-employment tax uses the statutory 15.3% rate (12.4% Social Security + 2.9% Medicare) on 92.35% of net self-employment income, with half of the SE tax deducted from federal taxable income above-the-line — per IRS Schedule SE (Form 1040) instructions, IRC §1401 and §164(f), 2026 edition. The 20% Qualified Business Income deduction (IRC §199A) is not modeled — it phases out by income and business type and is too state/entity-dependent to compute generically. This assumes the self-employment income is your only earnings for the year; if you also have W-2 wages, the Social Security wage-base cap and Additional Medicare threshold are actually based on your combined earnings, so this will overstate SE tax if you have significant wage income too.
This is an estimate based on standard single-filer federal, FICA, and NC state calculations. Actual withholding may differ based on your W-4 elections, pre-tax deductions (401k, health insurance), and other factors. NC's flat rate is scheduled to keep dropping annually — check ncdor.gov for the current year's confirmed figure.
Guideline version: 2026-NC-v1 · Effective: 2026-01-01 · Last verified: 2026-07-26