Tax decisions for people who work for themselves
Search can already tell you the self-employment tax rate is 15.3%. It cannot tell you whether electing S-Corp is worth it at your income, in your state. These calculators answer the decision, show the formula, and cite the IRS source for every number they use.
The calculators
Should I elect S-Corp, and at what income?
Compares self-employment tax as a sole proprietor against salary plus distributions as an S-Corp, net of payroll and filing costs, and tells you the income where electing starts to pay.
Open the calculatorWhat salary equals my contract rate?
Prices in the employer half of FICA, health insurance, unpaid time off and the 401(k) match you no longer get, so you can compare an offer with what you earn now.
Open the calculatorWhat do I owe on the next due date?
Works out each quarterly payment and checks whether the safe-harbor rule already protects you from an underpayment penalty.
Open the calculator
All three are live and free to use. No sign-up, and nothing you type leaves your browser.
How these numbers are produced
- Every figure cites its source
- Each rate, bracket and threshold links to the IRS publication or state schedule it came from, and shows the date it was last checked.
- The formulas are public
- The methodology page shows the arithmetic behind each calculator, so you can check the result rather than trust it.
- Estimates, not advice
- A calculator cannot see your whole situation. These are planning estimates, not a substitute for a CPA or enrolled agent.
Questions or corrections? Get in touch. If you find a number that is wrong, 1099 Math wants to hear about it.