What We Do

SelfEmpTaxCalc.com provides free, privacy-first tax estimation tools for U.S. 1099 independent contractors, freelancers, and self-employed individuals. All calculations run entirely in your browser — no server, no account, no data upload.

Methodology & IRS Sources

All calculation formulas, deduction rules, and tax thresholds are compiled from official IRS publications:

• IRS Publication 15 (Circular E): Employer's Tax Guide — used for payroll tax references
• IRS Publication 535: Business Expenses — deduction rules for home office, mileage, equipment
• IRS Publication 505: Tax Withholding and Estimated Tax — quarterly estimated tax calculation method
• IRS Publication 587: Business Use of Your Home — home office deduction
• IRS Form 1040-ES: Estimated Tax for Individuals — penalty and safe harbor rules
• IRS Publication 15-B: Employer's Tax Guide to Fringe Benefits
• IRS Publication 560: Retirement Plans for Small Business — SEP IRA limits

All site content is maintained and reviewed by our development team, with references linked directly to irs.gov official documentation for verification.

2026 Tax Year Data

Tax brackets, standard deductions, and contribution limits for the 2026 tax year are based on IRS inflation adjustments announced in October 2025. All figures are marked as estimates — users should verify against the official IRS.gov website before filing.

Last Reviewed

June 2026 — All calculation formulas and policy parameters were last reviewed against current IRS publications.

Contact

For bug reports or calculation concerns, please verify the number against IRS publications and contact us if you believe a figure is incorrect. We strive for accuracy but cannot guarantee all calculations are error-free.

This site does NOT provide professional tax, legal, or accounting advice. Always consult a licensed CPA or tax professional before making tax-related decisions.