Self-Employment Tax Calculator - Freelancer Estimate (2026)

The regular combined rate is 15.3%: 12.4% Social Security on the first $184,500 of combined wages and SE base plus 2.9% Medicare on all SE base at 92.35% of net. On $75,000 net, the base is $69,263, so Social Security is $8,589 and Medicare $2,009 for $10,597 regular SE tax.

Multiply $75,000×92.35% = $69,263, then 12.4%×$69,263 = $8,589 and 2.9%×$69,263 = $2,009 for $10,597 regular SE tax. Half of regular SE ($5,299) is an income-tax deduction, leaving taxable $53,601 single with $16,100 standard and federal income about $6,504, total $17,101 before credits.

Yes, the $184,500 Social Security base is shared. With $75,000 net ($69,263 base) and no W-2, the full base is subject to 12.4%. With $150,000 W-2 wages, only $34,500 of the $69,263 remains subject to 12.4% ($4,278), saving $4,311 versus no W-2, while Medicare 2.9% still applies to the full base.

Additional Medicare is 0.9% on SE base plus wages above $200,000 single, $250,000 joint, $125,000 separate per IRS. On $250,000 net single with $231,000 base plus $0 wages, the excess over $200,000 is $31,000, so additional is $279, making regular $22,305 plus $279 = $22,584 total SE tax.

Yes, ordinary and necessary expenses reduce net profit and thus SE base. Every $1,000 of valid expense on $75,000 net cuts the $69,263 base by $923 and regular SE tax by $141 (15.3%×92.35%). On $25,000 in expenses the saving is about $3,531 versus zero expenses.

At single 22% marginal, $10,000 extra net adds $9,235 to SE base, so SE tax rises $1,413 (12.4%×$9,235 $1,145 + 2.9%×$9,235 $268). Income tax rises $2,200 at 22% on $10,000 minus $707 half-SE deduction, so total federal rises about $3,613, a 36.1% marginal on the $10,000.

This calculator does not include: (1) state income tax, which can add 0% to 13.3% by state; (2) the QBI deduction, which can be 20% of qualified profit for eligible taxpayers but is income-tax only; or (3) credits, carryforwards or the $3,000 capital-loss limit. Federal only — state income tax not included.

No, this is a planning estimate. Filing uses exact Schedule C, Schedule SE, W-2s, 1099s, health and retirement limits, QBI worksheets, state returns and e-file validation. For quarterly, use IRS Form 1040-ES safe-harbor: 100% of prior-year tax or 110% above $150k AGI, or 90% of current year via annualized method if income varies.

On $75,000 net single no extra deductions, total federal is about $17,101, so $4,275 quarterly; joint is about $14,737, so $3,684. With $12,000 health and retirement, single total is $14,461, so $3,615. The 2026 dates are April 15, June 15, September 15 and January 15, 2027, with uneven periods.

An S-corp can pay a reasonable salary subject to FICA and take the rest as distribution not subject to SE tax, saving roughly $10,597 minus FICA on the salary. On $75,000 with a $40,000 salary, FICA on $40,000 is $3,060, saving about $7,537 before extra payroll, tax and compliance costs, so the net benefit often requires $60,000 to $80,000 consistent net.