TaxShifterPro

FREELANCER TAX STUDIO · 2026

1099 quarterly tax calculator

Plan for federal income tax and self-employment tax from your annual freelance profit. For sole proprietors with only self-employment income; use combined household income if filing jointly.

Free. No account needed. Your numbers are not saved or sent.

Your full-year estimate

Set aside per equal installment

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Enter your annual revenue to see your estimate.

2026 payment dates

  1. Installment 1April 15, 2026
  2. Installment 2June 15, 2026
  3. Installment 3September 15, 2026
  4. Installment 4January 15, 2027

Understand the estimate

Self-employment tax generally applies at $400 in net SE earnings: 12.4% Social Security up to the 2026 $184,500 wage base, plus 2.9% Medicare. An additional 0.9% Medicare tax applies above filing-status thresholds. Half of regular SE tax reduces income for this estimate. Income tax uses 2026 brackets and the standard deduction.

Not a return, refund promise, or payment submission. Excludes W-2 wages (including a spouse’s), credits, QBI, itemized deductions, capital gains, retirement/health-insurance deductions, AMT, NIIT and state/local tax. Joint calculations assume all profit belongs to one self-employed spouse. Separate businesses or uneven income require a personalized calculation.

Your next steps

  1. Update your income and expense forecast throughout the year.
  2. Review 2026 IRS Form 1040-ES for eligibility, credits and payment timing.
  3. Pay directly through official IRS payment options. TaxShifterPro does not collect these payments.
  4. Find a credential-reviewed professional for mixed income, deductions or state taxes.

Sources: IRS self-employment tax · Additional Medicare Tax · W-2 income tax calculator