U.S. Self-Employment

1099 & Self-Employment Tax Calculator 2026

Estimate the regular federal self-employment tax generated by 2026 net business profit, including the Social Security and Medicare portions and the deduction for one-half of regular self-employment tax.

2026 rules used

Rule	2026 treatment
Net earnings factor	92.35% of net self-employment profit
Social Security SE rate	12.4%
Medicare SE rate	2.9%
Social Security wage base	$184,500 across wages and self-employment earnings
Schedule SE threshold	Generally $400 of net earnings from self-employment

Calculation method

Net earnings for regular SE tax = net self-employment profit × 92.35%.
Medicare portion = net earnings × 2.9%.
Social Security portion = 12.4% of net earnings remaining under the $184,500 combined Social Security wage base after entered W-2 Social Security wages.
Regular self-employment tax = Social Security portion + Medicare portion.
Estimated deduction for one-half of regular SE tax = 50% of that regular SE tax.

1099 is a reporting form, not a separate tax rate. This calculator starts from net self-employment profit. It does not estimate ordinary federal income tax, state tax, quarterly payments, refundable credits or the Additional Medicare Tax. Multiple businesses, church employee income, optional methods, farm rules and other Schedule SE situations can require different treatment.

Worked example

With $100,000 of net self-employment profit and no W-2 Social Security wages, estimated net earnings are $92,350. The regular self-employment tax estimate is $14,129.55, with an estimated $7,064.78 deduction for one-half of that regular SE tax.

Primary sources

Methodology & verification

Tax year: 2026.
Method: Regular Schedule SE method using 92.35%, 12.4% Social Security and 2.9% Medicare components.
Social Security wage base: $184,500 for 2026.
Important exclusion: Additional Medicare Tax is not included.
Last reviewed: 2026-09-17.

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