About Mortgage Payoff Calculator
Free mortgage payoff calculator. See how extra payments accelerate your payoff date and reduce total interest. Compare monthly, annual, and lump-sum payment strategies.
How to use
- Enter your current mortgage balance (remaining principal), current interest rate, and the number of years remaining on your mortgage. You can find these details on your latest mortgage statement or by contacting your lender.
- Choose your extra payment strategy: add a fixed monthly extra payment, an annual lump-sum payment, or a one-time additional payment. Each approach accelerates your payoff differently. Monthly extras compound savings faster; annual lump sums are easier to budget from bonuses or tax refunds.
- Enter your extra payment amount. Start with realistic amounts — even $100/month extra on a $300,000 mortgage at 5.5% saves over $28,000 in interest and cuts 3 years off a 25-year mortgage. The calculator shows you the exact savings so you can decide how much is worth committing.
- Compare your original payoff date and total interest against the accelerated schedule side by side. The visual difference is often surprising — a $300,000 mortgage at 5.5% over 25 years costs $218,000 in total interest with minimum payments.
- Review the year-by-year breakdown showing how your equity builds faster with extra payments. Notice how the impact accelerates over time as the reduced principal means less interest accrued each month, creating a compounding effect on your savings.
- Experiment with different extra payment amounts to find your sweet spot. Doubling your extra payment does not double your savings — there are diminishing returns. The calculator helps you find the point where additional effort yields the most meaningful improvement.
Frequently asked questions
How much can I save with extra mortgage payments?
The savings are substantial. On a $300,000 mortgage at 5.5% over 25 years, an extra $200/month saves approximately $52,000 in interest and pays off the mortgage 5.5 years early. An extra $500/month saves $88,000 and cuts 9 years off the term. Even an extra $100/month saves $28,000 and shortens the mortgage by 3 years. The key is that extra payments go entirely toward principal, reducing the balance that interest is calculated on for every remaining payment.
Are monthly extras or annual lump sums more effective?
Monthly extras are slightly more effective because they reduce principal sooner, meaning less interest accrues each month. However, the difference is small — $200/month extra versus a $2,400 annual lump sum produces nearly identical results. Choose whichever you will actually stick with. If your cash flow varies, annual lump sums from bonuses or tax refunds may be more sustainable. If you have consistent monthly surplus, automated extra payments ensure you never miss one. Many Canadian mortgages allow both: regular payment increases and annual lump sums up to 10-20% of the original principal.
Should I pay off my mortgage early or invest?
This depends on your mortgage rate versus expected investment returns. If your mortgage rate is 6% and you expect 7-8% from a diversified investment portfolio, investing mathematically wins — but the margin is slim and investments carry risk. If your rate is below 4%, investing almost certainly wins. Above 6%, mortgage payoff provides a guaranteed, tax-free return equal to your interest rate. Consider your risk tolerance: mortgage payoff is guaranteed savings with zero risk, while investment returns fluctuate. Many people split the difference, making some extra mortgage payments while also investing. Use the
Compound Interest Calculator to model what your down payment equivalent would grow to if invested instead of applied to the mortgage.
Do Canadian mortgages allow prepayment?
Most Canadian mortgages include prepayment privileges allowing 10-20% of the original principal as an annual lump-sum payment and 10-25% increases to regular payments without penalty. For example, on a $300,000 original mortgage, a 15% prepayment privilege allows up to $45,000 in extra lump-sum payments per year. Exceeding these limits triggers a prepayment penalty, typically the higher of 3 months interest or the interest rate differential (IRD). Variable-rate mortgages usually only charge 3 months interest. Always check your specific mortgage terms before making large extra payments.
What about biweekly payments?
Accelerated biweekly payments are one of the easiest ways to pay off your mortgage faster without feeling the pinch. Instead of 12 monthly payments per year, you make 26 half-payments — equivalent to 13 monthly payments. That one extra payment per year goes entirely to principal. On a $300,000 mortgage at 5.5% over 25 years, accelerated biweekly saves approximately $34,000 in interest and pays off the mortgage about 3 years early. Most Canadian lenders offer this as a simple switch with no cost. The biweekly schedule also aligns better with biweekly paychecks.
When should I NOT pay extra on my mortgage?
Do not prioritize extra mortgage payments if: (1) you have high-interest debt — paying 20% credit card debt saves more per dollar than paying a 5% mortgage; (2) you have no emergency fund — build 3-6 months of expenses in savings first; (3) you are not maximizing employer RRSP matching — that is a guaranteed 50-100% return; (4) your TFSA has room and your mortgage rate is below 5% — tax-free investment growth likely exceeds mortgage interest savings. The optimal order is: high-interest debt, employer match, emergency fund, TFSA, then extra mortgage payments or RRSP depending on your tax bracket.
How do I calculate the interest savings from extra payments?
The savings come from reducing the principal balance that interest accrues on. A $100 extra payment in month one of a $300,000 mortgage at 5.5% saves $100 x 5.5% / 12 = $0.46 in interest the next month. That does not sound like much, but the reduced balance means every subsequent month also saves interest, and the savings compound over the remaining 20+ years of the mortgage. Over 25 years, that single $100 extra payment saves approximately $180 in total interest. Multiply by monthly extra payments over many years and the total savings reach tens of thousands of dollars.
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