1099 Tax Calculator 2026 — SE Tax & Quarterly Estimated Payments

Know exactly what you owe before the IRS sends a penalty notice.

If you earn 1099 income — freelancing, consulting, driving, selling, or any self-employed work — you owe self-employment tax and estimated quarterly payments four times a year. Miss them, and the IRS charges an underpayment penalty starting from the due date, not from April.

This calculator tells you your number in under 30 seconds.

What it calculates

Enter three inputs:

• Your annual 1099 net income


• Your estimated combined tax rate


• Your filing status
  
  

Everything else calculates automatically:

• Self-employment tax (15.3% applied to 92.35% of net income — the exact IRS method from Schedule SE)


• Social Security portion (12.4%, capped at the 2026 wage base of $184,500 per SSA)


• Medicare portion (2.9%, uncapped)


• Additional Medicare Tax (0.9% on income above $200k single / $250k married — threshold adjusts automatically by filing status)


• SE tax deduction (50% deductible from AGI per IRC §164(f), reduces your taxable income)


• Estimated income tax (flat-rate approximation on taxable income after SE deduction and standard deduction)


• Total estimated tax with effective rate as a percentage of gross income


• Quarterly payment amounts — equal 25% split across all four due dates
  
  

2026 figures built in:

• Standard deductions per IRS Rev. Proc. 2025-32 (Single $16,100 / MFJ $32,200 / MFS $16,100 / HoH $24,150)


• SS wage base per SSA October 2025 announcement
  
  

Payment Schedule tab — live due date tracker

The Payment Schedule tab shows all four quarterly deadlines with a live status that updates automatically:

• Due ✖ — past due (highlighted red)


• Due Soon — within 30 days (red highlight, countdown in days)


• Upcoming ✔ — on track (green)
  
  

No manual updates needed. Open the file any day and the status is current.

What's inside

Four tabs, all protected except the three input cells:

1. Start Here — instructions, important notes, license terms


2. SE Tax Calculator 2026 — your three inputs, all calculations, quarterly amounts


3. Tax Breakdown — bar chart showing SE tax vs income tax vs total


4. Payment Schedule — due dates with live countdown status
   
   

All formula cells are locked. Only the yellow input cells accept changes. Nothing to break.

Who it's for

• Freelancers, consultants, independent contractors


• 1099 workers, gig economy workers (Uber, DoorDash, Etsy sellers, Upwork)


• Sole proprietors


• Anyone who receives a 1099-NEC or 1099-MISC and needs to estimate their quarterly payments
  
  

Not for:

• W-2 employees with no side income


• S-corp shareholders paying salary


• Anyone with complex multi-state tax situations
  
  

Compatibility

• Excel 2013, 2016, 2019, 2021, Excel 365 — Windows and Mac


• No macros required


• Print areas set for Letter and A4


• The Tax Breakdown chart does not render in Google Sheets (all formulas work; chart only is affected)
  
  

Important

This is a simplified estimator. It uses a flat-rate income tax approximation — not progressive brackets. It excludes:

• The QBI deduction (§199A)


• Self-employed health insurance deduction (§162(l))


• Retirement contribution deductions
  
  

These exclusions are intentional for simplicity and are disclosed inside the file. For a precise tax computation, consult a CPA.

This calculator does not constitute tax advice.

Need quarter-by-quarter accuracy and safe harbor protection?

The full Self-Employed Tax Tracker 2026 in this shop calculates exact per-quarter tax based on when you earned the income — not just a flat 25% split. It also includes built-in safe harbor testing so you know whether your payments protect you from IRS penalties.

Search:Self-Employed Tax Tracker 2026 in the Hoda Finance shop.

License

• Single-user. Personal and professional use permitted.


• Tax professionals may use on behalf of individual clients.


• Multi-user distribution requires a separate license.
  
  

Contact:[email protected]