Start with net profit
Gross business income minus qualifying business expenses
Free 2026 calculator
Know what self-employment tax may take
Turn 1099 income and business expenses into a fast Social Security and Medicare tax estimate—then see where smarter planning could help
Built for 1099 incomeUses the 2026 Social Security wage baseNo email required
THE SIMPLE VERSIONIncome − expenses = net business profit↓Net profit drives self-employment tax
YOUR NUMBERS
Estimate your SE tax
Enter annual estimates before personal income taxes and state taxes
2026 DIRECTIONAL ESTIMATEBased on $72,000 net profit
Estimated self-employment tax$10,173About $848 per month
- Taxable SE earnings
- $66,492
- Social Security portion
- $8,245
- Medicare portion
- $1,928
- Potential half-SE-tax deduction
- $5,087
Educational estimate only. It excludes state and local tax, credits, other household income, Additional Medicare Tax, entity elections, special deductions, and prior-year safe-harbor rules
Find what I may be missingWhat the number means
One estimate—not your whole tax life
The calculator isolates self-employment tax so the result stays understandable. Lucy can use the rest of your facts to find and model the planning moves that may affect the bigger picture
Apply SE tax rules
The estimate applies the 92.35% adjustment, Social Security limit, and Medicare rate
Plan beyond the estimate
Personalized strategies may change deductions, taxable income, cash flow, or timing
Quick answers
Self-employment tax without the fog
What is self-employment tax
Self-employment tax generally covers Social Security and Medicare taxes for people who work for themselves. It is separate from federal and state income tax
What income is used in the estimate
The estimate starts with business income minus estimated qualifying business expenses, then applies the IRS self-employment earnings adjustment before calculating Social Security and Medicare portions
Is this my total tax bill
No. Your total result can also include federal and state income taxes, credits, other household income, withholding, entity choices, and other facts
Calculation assumptions follow current IRS self-employed guidance and the 2026 Social Security contribution base