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Tax Underpayment Calculator

2026 IRS Rates · Free · Instant · No Login Required

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Reviewed by Gig Worker Taxes Editorial Team · Updated April 2026

IRS.gov SBA.gov IRS Pub. 334 IRS Pub. 463 FreelancersUnion.org

⚠ This calculator provides educational estimates only — not professional tax advice. Tax situations vary. Consult a licensed CPA or Enrolled Agent for your specific situation. For IRS assistance, visit irs.gov/self-employed.

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