Tools · 2026 · 1099

Self-employment tax calculator

Schedule C net profit → SE tax, federal income tax, a quarterly 1040-ES number, and SEP vs solo 401(k) room. Read the self-employment tax guide first. This is not Schedule SE, not an S-corp model, and not a filing.

Schedule C net profit (after expenses) Filing status Age this year W-2 Social Security / Medicare wages (optional) Federal withholding already on the W-2

State income tax % (rough) Prior-year total federal tax (safe harbor) Prior-year AGI QBI 20% deduction Model retirement contribution as

Federal tax this year

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Educational estimate using Rev. Proc. 2025-32 brackets, SSA 2026 wage base $184,500, Notice 2025-67 415(c) $72,000, and Publication 560’s 20% self-employed rate. No NIIT, no extra standard deduction for age/blind, no SSTB wage/UBIA phase-out math. Need a rate first? Freelance rate calculator (optional tip). Sequence: PayPal playbook.

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This self-employment tax calculator is free. A voluntary tip supports this classroom — not a paywall, not tax software, not ads.

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