All three CRA instalment calculation methods compared side by side, plus a full tax estimator with current-year brackets, CPP and CPP2 — so you pay enough to avoid interest without overpaying.
What's inside
- All 3 CRA methods (no-calculation, prior-year, current-year) compared — pick the cheapest safe option
- Full tax estimator with 2025 brackets, CPP and CPP2
- Quarterly payment schedule with due dates
- Interest-avoidance logic explained in plain English
Accuracy you can check: every tax figure and line number in this sheet was re-verified against CRA-published figures in July 2026 (v1.1), the same way our free calculators are tested — read how we verify. Purchases include lifetime updates.
FAQ
Do I even need to pay instalments?
If your net tax owing exceeds $3,000 in two consecutive years, the CRA expects quarterly payments — this tells you how much.
Which method should I use?
The sheet compares all three on your numbers; usually prior-year is safest and current-year is cheapest if income dropped.
Save more with the bundle: every paid sheet for $99 — and bundle buyers get the founding year of Pro included when it launches (over $150 of value).
Get the Calculator — $15 CAD → See the Bundle →Pairs well with
- 📋 Tax Deduction Checklist — 86+ cra-eligible deductions with calculators — free.
- 📊 Expense Tracker (Sheet Edition) — prefer a spreadsheet? the offline edition of our free web tracker.
- 🧾 HST/GST Tracker — know exactly what you owe the cra each quarter.
- 💰 Free Tax Calculator — see your full tax + CPP bill first
Templates provide estimates and organization for planning purposes — not tax, legal, or accounting advice. Confirm with the CRA or a qualified professional before filing.