Mortgage Prepayment Strategies: Pay Off Your Home Faster

Why Prepayments Are the Fastest Route to Mortgage Freedom

Every dollar you put toward your mortgage principal, above and beyond your regular payment, does two things at once: it shrinks the balance and it eliminates all the future interest that dollar would have cost you. Because Canadian mortgages are front-loaded with interest in the early years, prepayments made sooner are worth far more than the same dollars made later. Used well, your prepayment privileges can knock years off your amortization and save tens of thousands in interest.

Know Your Prepayment Privileges

Nearly every closed Canadian mortgage comes with built-in prepayment privileges — the amount you're allowed to pay down each year without triggering a penalty. They're usually quoted as two percentages, for example "15/15" or "20/20":

• The first number is the lump-sum privilege — the share of your original principal you can pay off in a year as a one-time payment.
• The second is the payment-increase privilege — how much you can raise your regular payment.

These limits vary by lender, so it's worth knowing yours before you plan. A more generous privilege set can matter more than a slightly lower rate for a borrower who intends to pay aggressively.

Four Strategies That Work

1. Annual Lump-Sum Payments

If you receive a bonus, tax refund, or inheritance, applying it directly to principal is one of the highest-return uses of that money — you're effectively earning a guaranteed return equal to your mortgage rate, tax-free. Even modest annual lump sums compound into major savings.

2. Increase Your Regular Payment

Raising your payment — even by a small amount — sends the entire increase straight to principal. Many lenders let you adjust this once a year. Rounding a 1,940-dollar payment up to 2,100 dollars, for instance, barely changes your monthly budget but meaningfully shortens the amortization.

3. Switch to an Accelerated Frequency

Choosing accelerated bi-weekly or weekly payments builds in the equivalent of one extra monthly payment every year automatically. It's a set-and-forget prepayment that requires no ongoing effort.

4. Double Up or Round Up

Some lenders allow "double-up" payments, letting you pay extra on any given payment date up to the amount of a regular payment. Others let you round every payment up to a convenient number. Small, consistent additions add up quietly over a full term.

An Illustrative Example

Here's a rounded example for illustration only (not a quote). Suppose you owe 400,000 dollars amortized over 25 years. Adding just 100 dollars a week in extra principal — through a payment increase or accelerated schedule — can shorten the amortization by several years and save a large amount of interest over the life of the loan, because each extra dollar removes years of compounding interest behind it. The exact figures depend on your rate and balance, which is why it's worth modelling your own numbers before you commit.

Watch the Limits and Penalties

Prepayment power comes with rules, and getting them wrong can be expensive:

• Stay within your annual privilege. Exceeding your lump-sum or payment-increase limit can trigger a prepayment charge. Know your cap and time larger payments accordingly (for example, split a big lump sum across two calendar years).
• Breaking the mortgage entirely is different. Paying off the whole balance mid-term — to sell, refinance, or switch lenders — usually triggers a penalty calculated as the greater of three months' interest or the Interest Rate Differential (IRD). That's separate from your annual privileges.
• Reset the clock each year. Privileges typically don't carry over, so use them within the calendar or anniversary window your lender defines.

The Bottom Line

Prepayments are the most direct lever you control. Combine an accelerated schedule with an annual payment bump and the occasional lump sum, and you'll be surprised how quickly the balance falls. The key is knowing your specific privileges and penalty terms — details that differ from lender to lender.

Want to see how much faster you could be mortgage-free? Model your prepayments with the calculators at RateStreet.ca, or ask our team to review your options.