Self-Employment Tax Calculator
Self-Employment Tax Calculator calculates estimated SE tax; deductible half; federal estimate if mode enabled. Enter your assumptions above to get the primary answer first, followed by supporting metrics and detail where useful.
Inputs
Self-Employment Tax CalculatorResults
Adjust the inputs, then use the primary action. The result will appear here.
What this calculator answers
Self-Employment Tax Calculator calculates estimated SE tax; deductible half; federal estimate if mode enabled. Enter your assumptions above to get the primary answer first, followed by supporting metrics and detail where useful.
How this calculation works
This tool uses tax year; net self-employment income; filing inputs; optional deductions within scope. It returns estimated SE tax; deductible half; federal estimate if mode enabled. Headline results, charts, schedules, comparisons and exports are generated from the same normalized calculation state.
Worked example
Estimated self-employment tax: 8,477.73 • Social Security portion: 6,870.84 • Medicare portion: 1,606.89
Assumptions
Unless the tool says otherwise, rates are annual percentages, currency inputs are denominations rather than automatic FX conversions, and projections are mathematical models rather than guarantees. Typed values remain authoritative even outside normal slider ranges.
Limitations
Rules, limits, fees and tax calculations require a current versioned source package. When a source is stale or unavailable, the tool uses a truthful unavailable/manual state instead of pretending old data is current.
Sources & review
- IRS Revenue Procedure 2025-32 / 2026 inflation adjustments — United States federal tax/payroll rules. Last reviewed: 2026-09-25.
Privacy and review status
Financial inputs stay on this device by default and are not placed into analytics, advertising or error payloads. Review the methodology or report a calculation issue if something looks wrong. Methodology · Report a calculation issue.
Common questions
What does the Self-Employment Tax Calculator calculate?
It calculates estimated SE tax; deductible half; federal estimate if mode enabled. The result is based on the inputs and assumptions shown on this page.
What inputs does the Self-Employment Tax Calculator use?
The main inputs are tax year; net self-employment income; filing inputs; optional deductions within scope. Change them to model a different scenario.