Calculator lab

Mortgage Penalty

Estimate your mortgage prepayment penalty (IRD or three months’ interest) and compare scenarios.

Updated Sep 02, 2025

Calculator contextFor educational purposes only. Not financial advice.

Read the result

Treat the output as a directional estimate. Check the inputs that move the answer most before acting on it.

Method and sources

Calculators use the inputs shown on the page and educational formulas. They do not automatically know your actual fees, credit file, lender terms, or provincial rules that may apply. When an official rule affects tax, credit, eligibility, or rates, verify government or institution sources before acting.

Calculator limits

Taxes, fees, rates, provincial rules, or institution terms can change the real-world outcome. Use the result as a starting point for comparing scenarios, then confirm the numbers with official documents or the relevant provider.

How to interpret the estimate

Focus on the order of magnitude, the gap between scenarios, and the variables that move the result most. If a small assumption change materially changes the conclusion, test a conservative range before comparing products or speaking with an advisor. Also review the dates, because account limits, rates, fees, and tax rules can change.

After calculating

Keep your assumptions, compare a few scenarios, and return to the lab if you need to test another angle. Note the inputs you used so you can rerun the calculation when your income, balance, rate, or timeline changes.

All tools