Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Taxes
Tax Withholding Calculator
Calculate the tax withheld from a single paycheck given gross pay and a withholding rate. Use it to estimate what a flat withholding rate produces — for example, a state's flat income-tax rate or the bonus-flat-rate (22% supplemental wage withholding) used by US employers on certain payments.
Fill in the required fields to see your result.
Taxes
Self-Employment Tax Calculator
Calculate self-employment tax — the Social Security and Medicare contributions that self-employed people pay on net business earnings, equivalent to both the employee and employer share of FICA combined. Use it to estimate quarterly tax payments and plan for the SE tax liability that's often the biggest tax surprise for new freelancers and business owners.
Fill in the required fields to see your result.
Key differences
| Tax Withholding Calculator | Self-Employment Tax Calculator | |
|---|---|---|
| Category | Taxes | Taxes |
| Inputs required | 2 | 1 |
| Result | Tax Withheld ($) | Self-Employment Tax ($) |
| What it does | Calculate the tax withheld from a single paycheck given gross pay and a withholding rate. Use it to estimate what a flat withholding rate produces — for example, a state's flat income-tax rate or the bonus-flat-rate (22% supplemental wage withholding) used by US employers on certain payments. | Calculate self-employment tax — the Social Security and Medicare contributions that self-employed people pay on net business earnings, equivalent to both the employee and employer share of FICA combined. Use it to estimate quarterly tax payments and plan for the SE tax liability that's often the biggest tax surprise for new freelancers and business owners. |