Breaking a mortgage: estimate the penalty before making a move

Before selling or refinancing a rental during its mortgage term, ask for a dated payout quote. A rough penalty estimate helps you decide whether to investigate further, but the contract determines the rate inputs, formula and applicable charges.

The payout amount includes repayment of borrowed principal. The cost of breaking the loan includes potential penalties and other charges. Keep those two numbers separate when comparing a sale or refinance.

Start with open versus closed

An open mortgage permits prepayment without a prepayment penalty. A closed mortgage usually limits penalty-free extra payments and can impose a charge when you exceed those privileges or repay early. FCAC’s prepayment guidance explains that privileges and calculation methods vary.

For fixed closed products, common structures compare three months’ interest with an interest rate differential, or IRD. An IRD estimates the lender’s interest difference for the remaining term using rates defined in the agreement. It is not necessarily the difference between your rate and the best rate you find elsewhere.

CIBC’s FAQ describes the greater-of structure for fixed closed mortgages and a usual three-month-interest charge for variable closed mortgages. The word “usual” matters: read the named product terms before calculating.

Three months of which interest rate?

Suppose a separate hypothetical contract stipulates three months’ simple interest on the full CAD 400,000 balance at 5.5%:

$$C_3=P\times r\times3/12$$

Here, $C_3$ is the charge in CAD, $P$ is the CAD amount prepaid and $r$ is the stipulated annual rate as a decimal. CAD 400,000 × 5.5% × 3 ÷ 12 = CAD 5,500. This assumes the contract uses that rate and this arithmetic convention.

A real product can use a different rate. In its provisions before the end of the fifth year, section 4.12 of CIBC’s Ontario standard charge terms, form 5453-2026/04 uses CIBC Prime at preparation of the payout statement for the named Variable Flex full-payout charge. For illustration, a hypothetical 6% prime on CAD 400,000 produces CAD 6,000 under three-month simple arithmetic, even if the borrower’s mortgage rate is 5.5%.

Neither percentage is a current CIBC quote. The point is to check whether the charge uses the contract rate, prime, a posted rate or another stated input.

A simplified IRD comparison

Now use a separate hypothetical fixed contract with CAD 400,000 outstanding, 24 months remaining and a stipulated comparison of 5.5% against 4%. Assume a simple constant-balance IRD estimate:

$$C_D=P\times(r_a-r_b)\times m/12$$

Here, $C_D$ is the estimated CAD differential, $r_a$ and $r_b$ are the contract-defined annual rates as decimals, and $m$ is remaining months. CAD 400,000 × (5.5% − 4%) × 24 ÷ 12 gives CAD 12,000. Under the assumed greater-of rule, this exceeds CAD 5,500, so the illustrative penalty is CAD 12,000.

This teaching estimate is not CIBC’s fixed-rate formula. Actual IRD methods can account for posted-rate discounts, term selection, timing and changing balances differently. FCAC’s guide discusses these rate conventions. Ask the lender to show the actual calculation and applicable comparison term.

Build the complete payout bridge

For that same fixed example, stipulate another CAD 800 for administration/discharge costs, CAD 2,000 of cashback repayment and CAD 500 of ordinary accrued interest to the payout date:

The penalty, additional charges and cashback repayment total CAD 14,800. The ordinary accrued interest is owed for time already borrowed; it is not another break penalty. The principal is debt repayment, not a new CAD 400,000 loss caused by breaking.

FCAC’s mortgage-break guidance identifies possible appraisal, administration, discharge and other costs, plus cashback repayment. New-loan legal or appraisal costs may sit outside the old lender’s payout quote. Add them once when comparing the refinance.

Check alternatives before committing

Ask whether you can wait until maturity, use permitted prepayments or move the mortgage to another property through portability. Request the conditions, dates, approval requirements and costs. A portable mortgage is not an unconditional promise to fund any replacement property.

Ask whether a blend-and-extend option is available. It combines old and new rate terms in a longer agreement and may avoid an immediate prepayment charge, but compare the new rate, term and fees. Avoiding a line-item penalty does not by itself establish a lower total cost.

Obtain a payout quote for the expected closing date and refresh it if that date changes. Ask how payments made before payout are processed, when the quote expires and whether a partial prepayment changes the calculation. Do not assume unused annual privileges are automatically deducted from a full-payout penalty.

Then compare renewal, switching and refinancing. If the transaction is a sale, include the actual payout in the keep-or-sell comparison, rather than subtracting both the quoted payout and the same principal separately.

Sources

• FCAC — Mortgage fees: Prepayment penalties. Current educational page directly checked 2026-10-01; individual contract governs. Accessed October 1, 2026.
• CIBC — Mortgage frequently asked questions. Current page checked; contract/product terms govern. Accessed October 1, 2026.
• CIBC — Ontario Standard Charge Terms 5453-2026/04, Version A. Ontario named form 2026/04; signed product/charge terms govern. Accessed October 1, 2026.
• FCAC — Breaking your mortgage contract. Page dated 2025-10-15; directly checked 2026-10-01. Accessed October 1, 2026.