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Both calculators run independently β change the inputs on either side to compare results.
Quarterly Estimated Tax Calculator
Estimates your quarterly federal estimated-tax payment by applying your expected effective tax rate to expected annual income and dividing into four equal installments. Designed for the self-employed, contractors, retirees, and anyone with significant non-wage income that does not have tax withheld at source.
Self-Employment Tax Calculator
Calculate self-employment tax β 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.
Key differences
| Quarterly Estimated Tax Calculator | Self-Employment Tax Calculator | |
|---|---|---|
| Category | Taxes | Taxes |
| Inputs required | 2 | 1 |
| Result | Quarterly Payment ($) | Self-Employment Tax ($) |
| What it does | Estimates your quarterly federal estimated-tax payment by applying your expected effective tax rate to expected annual income and dividing into four equal installments. Designed for the self-employed, contractors, retirees, and anyone with significant non-wage income that does not have tax withheld at source. | Calculate self-employment tax β 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. |