Do I owe self-employment tax?

It is a separate tax from income tax

• Self-employment tax is the Social Security and Medicare piece for people who work for themselves.
• It is figured on your net earnings from self-employment, not on your gross receipts.

Two things that surprise people

• You can owe self-employment tax in a year you owe no income tax at all.
• You deduct a portion of it in figuring your adjusted gross income. That part is automatic once there are net earnings.

What it turns on

• your net earnings from self-employment for the year
• your business expenses, because they reduce net earnings
• any wages you also earned, which interact with the Social Security portion

What would make it not apply

• the income is wages reported on a Form W-2
• the activity is not a trade or business
• the income is of a kind the statute excludes from net earnings from self-employment

The law, quoted

Sources: IRC §1401 · IRC §1402 · IRC §164(f) · Instructions for Schedule SE (Form 1040) · Pub 334. Each passage below is copied from the document VALID fetched, with the start of its SHA-256 fingerprint.

(11) the exclusion from gross income provided by section 911(a)(1) shall not apply; (12) in lieu of the deduction provided by section 164(f) (relating to deduction for one-half of self-employment taxes), there shall be allowed a deduction equal to the product of- (A) the taxpayer's net earnings from self-employment for the taxable year (determined without regard to this paragraph), and (B) one-half of the sum of the rates imposed by subsections (a) and (b) of section 1401 for such year (determined without regard to the rate imposed under paragraph (2) of section 1401(b)); (13) there shall be excluded the distributive share of any item of income or loss of a limited partner, as such, other …

IRC §1402 — (5) if- · law in effect September 29, 2026 · fingerprint ffcb2cfd4c4d

• Filing Through Employers and Financial Institutions • Free Help With Your Return • When Is My Tax Return Due? • How Do I Pay Income Tax? • Estimated tax payments. • What are my options for paying estimated tax? • EFTPS. • Penalty for underpayment of tax. • Self-Employment (SE) Tax • Social security coverage. • How to become insured under social security. • Earning credits in 2025 and 2026. • The SSA time limit for posting self-employment income. • Who must pay SE tax. • SE tax rate. • Maximum earnings subject to SE tax. • Additional Medicare Tax. • More information. • Employment Taxes • Excise Taxes • Form 720. • Form 2290. • Depositing excise taxes. • Information Returns • Form …

Pub 334 · fingerprint 9af825abeb1c