Sources verified · May 18, 2026

Your 1099 income, after the IRS.

Self-employment tax + federal + state + quarterly estimate. Handles the Social Security wage-base interaction with any concurrent W-2 paycheck. Sources cited.

Total 1099 income for the year, before any expenses or taxes.

Optional — only if they apply to you

Deductible expenses against the 1099 income (Schedule C deductions).

Annual W-2 wages from any concurrent regular job. Used for the Social Security wage-base interaction.

SEP-IRA or Solo 401(k) contribution as % of net SE earnings. Reduces federal + state but not SE tax.

Optional. From last year's Form 1040 total tax, used only for a 1040-ES safe-harbor comparison.

Optional. Used to apply the 110% prior-year safe harbor when prior-year AGI is above $150,000.

No ads or lead-gen

New here? See it work with example numbers:

What this tool does and doesn’t do

  • Does: self-employment tax per IRS Schedule SE 2026 (12.4% Social Security + 2.9% Medicare on 92.35% of net SE earnings, with the Social Security wage-base interaction with any W-2 wages you entered), federal income tax on net SE earnings after the half-SE deduction and optional retirement contribution, state income tax via the same after-deduction basis, additional Medicare 0.9% surtax on combined wages over $200,000, and the current-year quarterly estimate from IRS Form 1040-ES. If you enter prior-year total tax and AGI, it also shows the prior-year safe-harbor figure. Retirement contributions are flagged against rough TY2026 SEP-IRA / Solo 401(k) limits, but not silently capped.
  • Doesn’t yet: apply the Section 199A Qualified Business Income (QBI) deduction to the federal figure — we keep that conservative and show an informational estimate of the likely benefit for filers below the 2026 threshold instead. Also not yet: plan-specific Pub 560 retirement worksheets, age/catch-up eligibility, other elective deferrals, employee calculations, the self-employed health-insurance deduction, local city / county taxes, or estimated-tax penalty calculations.
  • This is a planning estimate. It is not tax advice. Confirm important decisions with a qualified tax professional or CPA — self-employed taxes are an area where a one-time CPA consultation usually pays for itself.