Why Banks Charge a Penalty

Why Banks Charge a Penalty

Penalty3 min readFebruary 11, 2026
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When a borrower breaks their mortgage contract before the end of the term, the lender incurs a financial loss. The prepayment penalty is designed to compensate for that loss. In Canada, fédéral lenders supervised by OSFI must clearly disclose penalty calculation methods under Guideline B-20. In Quebec, the Civil Code (art. 2762 and following) also governs the rights of the hypothecary debtor. Banks calculate their anticipated loss by comparing the borrower's contractual rate to the current rate for a term equivalent to the remaining duration. If rates have dropped since signing, the bank loses interest income it would have earned over the remaining term. The mortgage break penalty is calculated using two main methods: three months' interest or the interest rate differential (IRD), with the lender generally applying whichever amount is higher. Monoline lenders and certain Desjardins caisses sometimes use methods more favourable to the borrower. Understanding the economic rationale behind the penalty helps the AMF-certified mortgage broker better advise clients on the true costs of refinancing.

The Economic Logic Behind the Mortgage Penalty

When you sign a fixed-rate mortgage contract, your lender commits to providing funds at a set rate for the entire term. In return, it counts on the interest income generated by your loan. If you repay early, the lender must reinvest those funds in a market where rates may be lower, incurring a real financial loss.

The mortgage break penalty is therefore compensation for an anticipated loss. It aims to make the lender financially neutral in the face of your decision to break the contract. This approach is recognized by the Civil Code of Quebec and governed federally by OSFI Guideline B-20.

The Two Calculation Methods in Brief

Canadian lenders use two main methods to calculate the penalty. The first is the three months' interest penalty: the mortgage balance is multiplied by the contractual rate, then divided by four (three months out of twelve). The second is the interest rate differential (IRD), which calculates the gap between your contractual rate and the lender's current rate for the remaining duration, applied to the balance for each month remaining in the term.

Why Penalties Vary From One Lender to Another

The major difference between lenders lies in the comparison rate used for the IRD calculation. Canada's Big 5 banks (RBC, TD, BMO, Scotiabank, CIBC) often use their posted rate as the reference, which is typically higher than the rate actually given to the client. This choice artificially inflates the rate gap and therefore the penalty. Monoline lenders and several Desjardins caisses use the discounted rate instead, producing significantly lower penalties.

The Role of the Mortgage Broker

A mortgage broker certified by the Autorite des marches financiers (AMF) has the obligation to disclose and explain penalty clauses to clients. Under the LDPSF, the broker must act in the client's best interest and provide complete information on the potential costs of breaking a mortgage, including the penalty, notary fees, discharge fees and any other exit costs.

  • The penalty compensates the lender's lost interest income.
  • The IRD is generally higher than three months' interest when rates have dropped.
  • The Big 5 banks use the posted rate, which increases the penalty.
  • Monoline lenders often offer fairer and more transparent penalties.
  • The AMF-certified broker must inform the client of potential penalties before signing.

Frequently Asked Questions

Why does my bank require a penalty if I repay my mortgage before the end of the term?
The bank committed funds at an agreed rate for a set duration. If you repay early, it loses the expected interest income. The penalty compensates for this anticipated loss. It is a standard clause in virtually all Canadian mortgage contracts, governed by OSFI Guideline B-20 for fédéral lenders.
Is the penalty the same at all lenders in Quebec?
No. Each lender uses its own method to calculate the interest rate differential (IRD). The Big 5 banks (RBC, TD, BMO, Scotia, CIBC) often use the posted rate rather than the discounted rate as the comparison basis, which inflates the penalty. Monoline lenders and certain Desjardins caisses use more transparent and often more favourable methods.
Does the AMF regulate mortgage penalties in Quebec?
The AMF regulates mortgage brokers through the LDPSF, but it is primarily OSFI (for fédéral lenders) and the Civil Code of Quebec that govern penalties. The broker has an obligation to properly inform clients about potential penalties before the contract is signed.
Does the penalty apply when selling my property?
Yes. If you sell your property before the end of the mortgage term, the break penalty applies unless your lender offers mortgage portability to the new property. Some lenders allow you to transfer the existing balance and rate, thereby avoiding the penalty.
Can I negotiate the penalty with my bank?
The penalty is calculated according to the contractual formula and is rarely directly negotiable. However, a mortgage broker can help identify strategies to reduce it, such as using your prepayment privilege to lower the balance before breaking, or opting for a blend-and-extend.

Educational information only. This does not constitute financial advice under the Act Respecting the Distribution of Financial Products and Services (LDPSF). Consult an AMF-certified mortgage broker before making any financial decision.

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