How a mortgage break fee is actually calculated

A prepayment penalty is not a single posted price. On a closed mortgage it is usually the higher of three months' interest on the amount you repay early and the interest-rate differential, using the remaining term and the pair of rates named in the contract. The number that matters is the one the lender puts in writing. A website calculator, or a federal worked example, is not a quote.

What actually triggers the fee

The Financial Consumer Agency of Canada lists the events that can produce a charge. The lender may levy it if you pay more than the extra amount allowed, break the contract, move the loan to another lender before maturity, or pay the balance in full before the term ends, including when you sell. Contracts also call it a prepayment charge or a breakage cost. The label changes. The economics do not: you are buying your way out of a term that has not finished.

The product type is the first cut. An open mortgage can be broken without that penalty. A closed mortgage usually cannot. The agency notes that open loans typically carry a higher rate than closed loans of similar length, and that closed loans usually cap how much extra principal you can pay each year. Before you run three months' interest, read whether the contract is open or closed.

The disclosure rules the agency describes apply when you deal with a federally regulated institution, such as a bank. A provincial or private lender may use a different method. The calculation that matters is the one in your agreement.

Three months' interest versus the IRD

The agency says the penalty is usually the higher of three months' interest on what you still owe and the interest-rate differential, the IRD. It also says lenders usually apply the IRD when your rate sits above current rates and you signed the present contract less than five years ago. A wide rate gap with little time left, or a long remainder with almost no gap, do not produce the same bill.

Three months' interest is charged on the amount you prepay, not on the original loan. At 6% on a $200,000 balance, three months equal $3,000. That is the figure in the agency's published example. The arithmetic is the balance, times the contract rate, times three-twelfths. It does not care what comparable rates are doing.

The IRD compares two rates over the time left in the term. The agency's description is: the lender totals the interest still owing to the end of the term at one rate, repeats the exercise at a second rate, and keeps the difference. The first rate may be the posted rate when you signed, or the current or discounted rate described in the contract. The second may be today's posted rate for a similar remaining term, or that posted rate minus the discount you originally received. Two contracts that both mention an IRD are therefore not doing the same math.

The agency is explicit that methods differ by lender. Federally regulated banks keep an online calculator. It estimates. It does not replace the contract or a written payout statement.

A worked example where the IRD wins, then where it loses

The agency's published example assumes a $200,000 balance at 6%, 36 months left on a five-year term, and a 4% posted rate for a 36-month term at the same lender. Three months' interest comes to about $3,000. The IRD comes to about $12,000. You pay the $12,000, and you may also pay an administration fee. That is not an offer. It is the federal illustration of the mechanism: a two-point gap stretched across three remaining years outweighs a quarter-year of interest.

The same mechanism flips when little time is left, or when the rate gap is thin. Use an illustrative contract rate of 4.50%. That is not an offer. A household is selling with 10 months remaining, a $340,000 balance, and a comparable posted rate of 4.25% at its lender. Three months' interest is $340,000 times 4.50% times three-twelfths, or $3,825. A simple IRD is 0.25 of a percentage point times $340,000 times ten-twelfths, about $708. The higher figure is $3,825. Here the differential does not win. The three-month floor does.

The levers are the amount prepaid, the gap between the two rates, and the months left. A refinance floated two years before maturity, after posted rates have fallen a long way, looks like the first scene. A sale ten months from the end, with rates nearby, looks like the second. Our article on refinancing to consolidate debts treats the penalty as a cost to subtract from a monthly surplus. The question here is which of the two formulas will actually apply.

Which two rates the contract uses

The $12,000 in the federal example assumes a two-point gap between 6% and 4%. If the lender starts from the original posted rate rather than the discounted contract rate, the gap widens. If the second rate is today's posted rate minus the discount you received at funding, the gap widens again. In both cases the IRD rises even though your payment has not changed. The agency flags this: the IRD calculation may depend on the rate in the contract, and a rate below posted is called a discounted rate.

That is why an estimate that uses the rate you pay, set against today's posted rate for a nearby term, can understate the bill. Ask which two rates the lender will use, where they are published, and whether leftover months are rounded to the nearest comparable term. A rounding difference of a few months changes the comparable rate, and therefore the IRD.

The rate type does not cancel the higher-of rule. A closed variable loan can still compare three months' interest with a differential. When the contract rate has followed the market down, the gap narrows and the three-month amount wins more often. When the loan is fixed and posted rates have receded, the IRD wins more often. The exit question is not the monthly payment. It is the gap the lender will measure on the day the charge is discharged.

Privileges, porting and blend-and-extend

A prepayment privilege is extra principal, or a payment increase, that the contract lets you make without a penalty. The agency says privileges vary, are usually measured by year, and that unused room typically does not carry forward. Using them before a break lowers the balance the penalty will sit on. In the federal example, a $20,000 lump sum accepted just before payout would leave $180,000. Three months' interest would fall to $2,700 and the IRD to $10,800. That saving exists only if the lender still allows the privilege. The agency warns that some restrict lump sums when the break date is close.

If you are selling to buy again, ask whether the mortgage is portable. The agency describes porting as taking the rate and terms to the new property, which avoids breaking one contract to open another. A cheaper home than the remaining balance can still leave a penalty on the portion that does not move.

Another path, with the current lender, is an early renewal often called blend-and-extend. The agency explains that this option avoids the prepayment penalty, though administration fees may still apply. The new rate mixes the rate still running with the rate on the new term. In its illustration, a $200,000 balance at 5.5% with 24 months left, blended with 4% for the rest of a new 60-month term, produces 4.6% for 60 months. That is not free: you lengthen the term and you accept a rate that is not today's posted rate. It is often less severe than a five-figure IRD, and more expensive than waiting for maturity.

On top, the agency lists administration, appraisal, reinvestment and discharge or registration fees, and sometimes repayment of cash back received at funding. Add them to the higher of the two calculations before you conclude that breaking the term reduces interest. Waiting until maturity, which our renewal-letter guide treats as a comparison point, remains the option that sets the penalty to zero.

What to get in writing before you break the term

For a federally regulated institution, the information box at the front of the agreement must describe privileges, penalties and other key details. The lender must tell you how it calculates the charge and which factors it uses, in language that is clear, simple and not misleading. Banks that belong to the Canadian Bankers Association have also committed, under a code of conduct the agency describes, to an online calculator, an annual statement, a toll-free line, and a written statement once you confirm a full or partial payout. That statement should name the amount, the method, how long the figure remains valid, and any other fees.

Before you sign a sale, a refinance or a transfer, have four facts written down. Which balance will be used, after any privilege still available. Which two rates will enter the IRD, and where they are published. How many remaining months the lender will count. Which extra fees apply, including any cash back to repay. Then compare that total with three exits: wait for maturity, port, or blend and extend.

The useful work is not a rate call. It is seeing which of the two formulas applies, with which pair of rates, and whether the cost of leaving now exceeds the interest you think you will save. You can have the contract and the penalty reviewed before you break the term. A first conversation is free and does not commit you to a lender.

Certain conditions may apply. Subject to change without notice.