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North Carolina Self-Employment Tax Calculator

Estimate SE tax, federal and state tax, and a quarterly estimated-payment amount on 1099/self-employment income

Estimate only — not tax advice. Self-employment tax is 15.3% (12.4% Social Security + 2.9% Medicare) on 92.35% of net SE income, with half of it deducted from federal taxable income. Assumes this is your only income for the year — if you also have W-2 wages, results will run high (see methodology below). Does not model the 20% Qualified Business Income deduction. The quarterly figure is an even 4-way split of annual liability, not the IRS's actual (unevenly spaced) estimated-payment due dates.

North Carolina Paycheck Calculator FAQ

Is North Carolina's income tax rate still dropping?

Yes. Under Session Law 2023-134, North Carolina's flat rate has phased down annually — 4.5% (2024), 4.25% (2025), 3.99% (2026) — with further cuts to 3.75% (2027) and 3.5% (2028) scheduled if state revenue triggers are met.

What is North Carolina's standard deduction for 2026?

$12,750 for single filers under current law. A pending bill (S437) would raise it to $13,000, but that had not been enacted as of this page's last-verified date — check ncdor.gov for the final figure.

Does North Carolina have local income tax?

No. North Carolina counties and municipalities do not levy separate local income taxes on wages.

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