1099 Self-Employment Tax Calculator
SE tax = Net × 0.9235 × 15.3% (12.4% SS to $176,100 + 2.9% Medicare) · Half is income-tax deductible.
- SE earnings (×92.35%)
- —
- Social Security (12.4%)
- —
- Medicare (2.9%)
- —
- Total SE tax
- —
- Above-the-line deduction (½)
- —
TY 2025 SS wage base $176,100. Additional 0.9% Medicare surtax on combined SE+wages above $200k single / $250k MFJ — not modeled here.
About this tool
1099 Self-Employment Tax Calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Tax & Government — US Federal. Browse more Tax & Government — US Federal tools.