QUÉBEC MORTGAGE GUIDE
Accelerated mortgage payments: estimate interest savings
Regular biweekly payments are calculated to amortize the mortgage over the selected term. Accelerated biweekly payments are generally one-half of a monthly payment, paid 26 times yearly. That amounts to roughly thirteen monthly payments rather than twelve.
Use these explanations to compare scenarios in our calculator without registering. Estimates are not lending offers or binding mortgage terms.
Regular versus accelerated biweekly payments
Regular biweekly payments are calculated to amortize the mortgage over the selected term. Accelerated biweekly payments are generally one-half of a monthly payment, paid 26 times yearly. That amounts to roughly thirteen monthly payments rather than twelve.
Where do the interest savings come from?
Additional payments reduce principal sooner. A lower balance generates less interest, potentially shortening amortization. Results depend on the rate, amount borrowed, payment frequency and prepayment privileges in the contract.
Compare scenarios with consistent assumptions
Keep principal, rate and amortization the same. Compare monthly, biweekly, accelerated biweekly and accelerated weekly payments. Lifetime interest estimates assume an unchanged rate and cannot forecast future renewals.
Explore other mortgage calculations
- Québec land transfer tax calculator — municipal 2026 schedules
- Calculate a mortgage payment in Québec: formula, example and interest
- CMHC mortgage insurance premium in Québec: down payment, rates and tax
- 25-year versus 30-year mortgage amortization in Québec
- Mortgage renewal in Québec: calculate your next payment
- Mortgage stress test in Canada: qualifying rate and calculation
A practical comparison to make
Regular biweekly payments divide yearly payments into 26 portions. Accelerated biweekly payments are usually half the regular monthly amount paid 26 times, roughly equivalent to one additional monthly payment per year.
Check the free mortgage calculator with your own figures. Its optional homeownership-budget section also allows you to enter taxes, insurance and condo fees without sending data to a server.
Example: biweekly vs accelerated biweekly
| Metric | Regular biweekly | Accelerated |
|---|---|---|
| Payment per period | $1,020.78 | $1,106.95 |
| Estimated payoff | 25.0 years | 21.7 years |
| Projected interest savings* | — | $39,399.46 |
*Estimated savings versus regular biweekly over the full payoff, assuming a constant interest rate. Accelerated biweekly payments require higher annual cash outflow.
Computed with the same Canadian semiannual-compounding engine as Isabelle’s calculator; figures are rounded to cents.