SELF-EMPLOYED / FEDERAL

1099 tax
calculator.

Start with business profit, then separate self-employment tax from income tax. This is a limited federal planning model for 2026, not your final tax bill.

2026 / FEDERAL PLANNING

Your annual business income

Total business receipts ($)

Allowable business expenses ($)

Include taxable receipts even if no 1099 was issued. Expenses must qualify as business expenses, not personal spending.

Filing status

W-2 income and expected federal withholding

Full-year expected amounts across jobs. Box 1, Social Security and Medicare wages can differ. Only your own wages use your self-employment Social Security limit.

Your expected W-2 box 1 wages ($)

Your Social Security wages + applicable tips ($)

Your expected W-2 box 5 wages ($)

Expected annual federal income + Additional Medicare withholding ($)

Withholding changes only the savings illustration. Do not include regular Social Security/Medicare withholding or estimated payments already made.

Include a supported qualified business income (QBI) deduction

QBI is excluded by default. Optional QBI works only when qualified income and pre-QBI taxable income are at least $2,000 and taxable income is below the applicable 2026 threshold. Other cases require review.

I confirm: one ordinary Schedule C business; U.S. resident, under 65, not blind or a dependent; standard deduction; no other income, credits or adjustments beyond those entered. No spouse business, capital gains, special deductions, retirement/health adjustments or community-property allocations. If filing separately, my spouse does not itemize.

Why 15.3% is not the whole calculation

Regular self-employment tax generally applies to 92.35% of eligible net profit. The Social Security part has a per-person wage limit; Medicare does not. Income tax is calculated separately after supported adjustments and the standard deduction.

A $100,000 profit example

For a supported single filer with $120,000 receipts, $20,000 expenses and no W-2 wages, modeled self-employment tax is $14,129.55. Excluding QBI, modeled total federal liability is $25,745.30. With the supported QBI option, it is $22,364.55. These examples exclude state/local tax, credits, AMT and other unmodeled items.

What the business increase means

If you also earn wages, the model compares the result with the same wage income and no business profit. It does not subtract your entire household income tax from business profit. A spouse’s wages do not use up your individual Social Security wage limit.

QBI and payment limits

The 2026 minimum QBI deduction and high-income rules make a universal 20% shortcut unreliable. This tool offers the regular deduction only in a range where the minimum cannot change the result. Quarterly savings are a budget illustration, not estimated-tax installments or a penalty safe-harbor calculation.

Official sources

Sources reviewed August 31, 2026. Methodology · W-2 paycheck calculator