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Utah Self-Employment Tax Calculator

Calculate federal SE tax plus Utah state tax on self-employment income.

Combines the 15.3% federal self-employment tax on 92.35% of net earnings with Utah's flat 4.55% state income tax, applying the deductible half-of-SE-tax adjustment to estimate total tax for Utah freelancers and contractors.

What is the self-employment tax rate?

The federal self-employment tax is 15.3%, covering 12.4% Social Security and 2.9% Medicare. It applies to 92.35% of your net self-employment earnings, which mirrors the employer-paid portion regular employees do not see.

Self-employed Utahns owe two distinct taxes on their profit: the 15.3% federal self-employment (SE) tax for Social Security and Medicare, and Utah’s flat 4.55% state income tax. This calculator combines both, correctly applying the 92.35% SE base and the deductible half-of-SE-tax adjustment so you can plan quarterly estimated payments.

How it works

The calculation proceeds in order:

  1. SE tax base. Multiply net self-employment income by 92.35% to get the SE tax base (the Social Security wage base caps the 12.4% portion).
  2. Federal SE tax. Apply 15.3% (12.4% Social Security up to the wage base plus 2.9% Medicare on all of it).
  3. Half-SE deduction. Subtract half of the SE tax from net income — this is deductible against income tax.
  4. Utah income tax. Apply Utah’s flat 4.55% to the income after the half-SE deduction.

Your total is federal SE tax + Utah state income tax.

Tips and example

On $80,000 of net self-employment income, the SE base is 80,000 x 0.9235 = $73,880, and the SE tax is 73,880 x 15.3% ≈ $11,304. Half of that, about $5,652, is deducted, leaving roughly $74,348 for Utah tax: 74,348 x 4.55% ≈ $3,383. Combined, that is about $14,687 before federal income tax.

Because no employer withholds these amounts, set aside money each quarter. Pair this with a federal income-tax estimate to size your total quarterly payments accurately.