SPREADSHEET
Freelance Quarterly Tax Estimator
IN ONE PARAGRAPHThe Quarterly Tax Estimator is a spreadsheet that tells self-employed people what to set aside for each estimated-tax deadline, what has already been paid and what remains. The Quarterly Tax Estimator uses the US 1040-ES payment periods, prefilled and fully editable, and costs $4 once.
The April panic is optional. This estimator tells you what to set aside for each estimated-tax deadline — while there is still time to save it.
How it works
- Enter monthly income and deductible expenses (yellow cells)
- Set your own estimated tax rate
- See the estimated payment per deadline, what you already paid, and what remains
- US 1040-ES payment periods prefilled correctly (they are uneven: Jan–Mar, Apr–May, Jun–Aug, Sep–Dec) — and fully editable if you are elsewhere
Works in Google Sheets, Excel 2010+, LibreOffice. No macros. Every formula machine-verified.
Note: this is an estimator driven by the rate you choose — not tax advice. Confirm your rate and rules with your accountant.
Verification
Every metric uses the standard industry definition and the formulas are machine-tested for arithmetic correctness before release. The spreadsheet ships with a worked example and a plain-English “Start Here” sheet.
