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Breaking a Mortgage Early in Ontario: How Penalties Work

Learn how Ontario mortgage prepayment penalties work, comparing three months' interest with the interest rate differential, and your options if you sell.

Real Estate4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 6, 2026
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Key takeaways
  • The penalty for breaking a mortgage is usually the higher of three months' interest on what you still owe or the interest rate differential.
  • Porting your mortgage to a new home can avoid breaking the contract, but whether you can port depends on the lender, and a cheaper home may still trigger a penalty.
  • Your own mortgage agreement sets out the privileges and penalties, so read it before you list your home or sign a refinance.

Plans change. You may need to sell mid-term because of a move, a separation or a job change, or you may want to refinance to change your payments. In each case, the lender will usually expect you to pay something to leave the mortgage contract early.

That charge can be significant, and it can change whether a sale or refinance makes sense. This article explains the two common ways the penalty is set, the exceptions to watch for, and what to check before you commit.

Why a penalty applies

A fixed-rate or fixed-term mortgage is a contract. The lender agreed to lend you money at a set rate for a set term, and it expects to earn that interest. If you pay the mortgage off early, the lender usually charges a penalty to make up for what it loses.

If you break a mortgage contract, the penalty is usually the higher of three months' interest on what you still owe or the interest rate differential, often called the IRD. Because it is the higher of the two, you cannot assume the smaller number will apply to you.

Three months' interest versus the IRD

MethodWhat it generally meansWhat to check
Three months' interestThree months of interest on the balance you still oweYour balance and your rate on the day you pay out
Interest rate differential (IRD)The other possible amount, which can be higher than three months' interestThe formula in your own mortgage agreement

Because the IRD can be the larger figure, ask your lender how it would work out the amount for your mortgage. Your mortgage agreement is the place to look for how the penalty is worked out. Federally regulated lenders must set out prepayment privileges and penalties in an information box at the start of the mortgage agreement. How a provincially regulated or private lender sets this out depends on your contract, so ask where to find it.

Ask the lender for a written payout figure with the calculation shown. A figure quoted by phone is only an estimate, and it can change with your payout date.

Ways to reduce or avoid the penalty

Questions to ask before you sell or refinance

If you are refinancing, add the penalty to your other costs. A lower rate may not be worth it if the penalty absorbs most of the saving. A mortgage professional or accountant can run the numbers with your actual figures.

What to do next

Find your mortgage agreement and any renewal letter, and read the prepayment section first. Then ask the lender for a written payout statement for your likely closing date.

If you are selling, tell your real estate lawyer about the mortgage early so the payout can be built into the closing. If the contract is unclear, or the lender's figure looks different from what your agreement says, a lawyer can review the wording before you sign anything.

Frequently asked questions

Is the penalty always three months' interest?

No. It is usually the higher of three months' interest on what you still owe or the interest rate differential. Your mortgage agreement sets out which applies and how it is worked out.

Can I avoid the penalty by moving my mortgage to a new home?

Possibly. A portable mortgage lets you transfer your balance, rate and terms to a new home, but whether you can port depends on the lender. If the new home costs less than the mortgage amount, you may still pay a penalty.

Do I always have to wait for the end of the term?

Not always. For a term longer than five years, you may pay off the mortgage after five years by paying principal, interest and three months' further interest. This does not apply to mortgages given by corporations.

Where do I find the penalty rules for my mortgage?

They are in your mortgage agreement. Federally regulated lenders must set out prepayment privileges and penalties in an information box at the start of the agreement.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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