Free tool · 2026 · 🇺🇸 IRS

Quarterly estimated tax (Form 1040-ES) calculator

Self-employed? Required if you'll owe $1,000+ in federal tax. Plug in your year-to-date numbers and we'll tell you what to send — and when.

Estimates only. Platform fees, tax rates and expenses vary by location and situation. Edit any field to match your real numbers. For tax decisions, consult a tax professional.

Your year-to-date numbers

Region

Average SE + federal/state combined

YTD gross income ($)

YTD expenses ($) — gas, supplies, fees

YTD miles driven for work

Deducted at $0.70/mi (IRS 2026 rate)

Already paid in quarterly estimated tax (form 1040-es) ($)

Next instalment to plan for

Your next payment

$364.50

Send this to the IRS (Schedule C + SE) by Q1 — Apr 15.

YTD net before tax: $11,000.00
Mileage deduction: − $5,600.00
Taxable net: $5,400.00
Estimated annual tax (27%): $1,458.00
Already paid: − $0.00
Still owed for the year: $1,458.00

Premium

Full year tracking + Schedule C + SE export

✓ Auto-tracks every instalment as income comes in
✓ Real-time mileage / km log (no 10-trip cap)
✓ Year-end tax packet ready for your accountant

Start 7-day free trial →

🇺🇸 IRS Quarterly estimated tax (Form 1040-ES) deadlines

Q1 — Apr 15

Q2 — Jun 15

Q3 — Sep 15

Q4 — Jan 15 (following year)

Estimates are educational, not tax advice. Effective rates blend self-employment / payroll tax (CPP, NI, Medicare etc.) with average income tax for your region. For your actual filing, work with a licensed accountant or visit the IRS Schedule C + SE page.