Why are private mortgage penalties so high?

Bank mortgages usually charge the higher of 3 months' interest or an interest rate differential (IRD), according to the Financial Consumer Agency of Canada. That is contract practice, not a legal cap. Many private mortgage contracts instead use "yield maintenance," which charges all the interest the lender would have earned for the rest of the term.

Can I negotiate a private mortgage penalty?

Usually, no. The terms are strictly laid out in the contract you signed. However, if you are refinancing with another lender, that new lender may allow you to roll the penalty cost into the new, lower-interest mortgage.

What are the hidden fees?

Aside from the interest penalty, breaking a private mortgage often triggers discharge fees, administrative fees, and legal fees paid to the lender's lawyer (which you must cover). These easily add thousands to the total cost.

Does the Interest Act limit a private lender's penalty?

Only in a narrow case. Section 10 of the federal Interest Act lets an individual borrower repay a mortgage whose term runs longer than five years, once five years have passed, by paying three months' further interest. It does not help on a 1-year or 2-year private term, and it does not apply to mortgages given by corporations.

Is yield maintenance the same as an IRD penalty?

No. An IRD charges the gap between your rate and a lower comparison rate over the remaining term. Yield maintenance as modelled here charges your full contract rate for every remaining month, so it is larger whenever the comparison rate is above zero.

Can the penalty be added to a new mortgage?

Sometimes. A refinancing lender may lend enough to cover the payout, penalty and fees, but that only works if your equity and income qualify for the larger loan. Get a written payout statement from the private lender first so the new lender sees the exact figure.

Private Mortgage Penalty Calculator

Model the exact capital burn required to extricate yourself from an unregulated private mortgage.

Last Updated: October 22, 2026

Toxic B-Lender Interest Penalty Math

The Contract Reality

Current Private Balance ($)

Annual Interest Rate (%)

Months Remaining on 1-Year Term

Hidden Break Factors

Lender Admin Fee

Discharge Fee

Required Independent Legal Counsel

Total Extrication Cost

Yield Maintenance (Pure Interest)$33,333

Admin + Legal + Discharge$4,400

Total Capital Burn to Break Early$37,733

This total assumes the contract charges all interest for the remaining months. Bank mortgages usually charge the higher of 3 months' interest or an interest rate differential instead. Check your own commitment letter for the actual clause.

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The Unregulated Trap

Bank mortgages usually set the prepayment penalty at the higher of 3 months' interest or an interest rate differential, and federally regulated lenders must disclose how they calculate it. That is a contract term, not a statutory cap. Private mortgage contracts are written by the lender and often charge far more.

If you break a 1-year private mortgage after 4 months and the contract has a yield maintenance clause, you owe the interest for the remaining 8 months at payout, on top of fees. Not every private contract works this way, so read the prepayment clause before you rely on this estimate.

The Yield Maintenance Formula (Private Lender)

Unlike standard mortgages, private lenders often demand 100% of the future interest they would have earned, plus exorbitant discharge and legal fees.

P e na l t y = B a l an ce \times (\frac{R a t e}{12}) \times M o n t h s R e mainin g + A d min F ees

BalanceCurrent outstanding principal

RateYour high annual interest rate (e.g., 12%)

M o n t h s R e mainin g

How many months are left on the contract term

Manual Example: The 8-Month Trap

You have a $300,000 private mortgage at 12% interest on a 1-year term. You want to break it 4 months in (8 months remaining). Discharge/legal fees are $1,500.

1. Monthly Interest

You pay $3k per month in pure interest.

$300, 000 \times (\frac{0.12}{12}) = $3, 000

2. Yield Maintenance

The lender demands all interest for the remaining 8 months.

$3, 000 \times 8 = $24, 000

3. Add Fees

Add the administrative and legal discharge fees.

$24, 000 + $1, 500 = $25, 500

Result

This is the cash required just to exit the contract.

$25, 500 Total Penalty

How the penalty total is built

The calculator finds one month of interest as balance x annual rate / 12, multiplies it by the months left in the term, and adds the lender admin fee, the discharge fee and the legal fee you enter. It keeps the balance flat for the rest of the term, which matches an interest-only private loan; on a loan where principal is falling, the true remaining interest is slightly lower.

Every input moves the answer in a straight line. Double the months remaining and the interest part doubles. A one-point rate change on a $400,000 balance changes the monthly interest by about $333. The three fee boxes add dollar for dollar, so use the figures on the lender's payout statement once you have one.

Second worked example: $250,000 at 9.99% with 5 months left

Inputs: $250,000 balance, 9.99% rate, 5 months remaining, $1,000 admin fee, $350 discharge fee and $1,800 legal fee. Monthly interest is $250,000 x 0.0999 / 12 = $2,081.25. Five months of it is $10,406.25. Adding $3,150 of fees gives a total of $13,556.25.

Compare a bank-style penalty on the same loan. Three months' interest would be 3 x $2,081.25 = $6,243.75. An interest rate differential against a 7% comparison rate would be 0.0299 x $250,000 x 5 / 12 = $3,114.58. The higher of those two is $6,243.75, so the yield maintenance clause costs about $4,160 more before fees.

Where the law does and does not limit the penalty

The Financial Consumer Agency of Canada describes the usual bank penalty as the higher of three months' interest or the interest rate differential, and federally regulated lenders must explain how they calculate it. That is common contract practice, not a legal ceiling, and an open mortgage carries no penalty at all.

The one federal cap is section 10 of the Interest Act. If a mortgage is not due until more than five years after it was made, an individual borrower can repay it after the five years by paying three months' further interest. It does not apply to corporate borrowers, and it gives no relief on the 1-year or 2-year terms common in private lending.

Limits and edge cases

Future interest is not discounted to today's dollars, so the result is the full contractual amount, not a negotiated payout.
Prepayment privileges, such as a right to repay part of the balance without penalty, are not modelled.
The months box is labelled for a 1-year term, but any remaining term works; the tool does not check it against your contract.
Provincial consumer protection rules and broker regulation are not applied.
If a new lender rolls the penalty into a refinance, the interest on that larger loan is not included here.

Disclaimer: This private mortgage penalty calculator assumes your contract charges every remaining month of interest, which many private agreements do but some do not. The binding figure is the one on your lender's written payout statement, so have a real estate lawyer review the prepayment clause before you commit to breaking the loan.

Sources checked

FCAC: Mortgage fees - prepayment penalties: penalty usually the higher of three months' interest or the IRD; no penalty on open mortgages (checked 2026-10-22)
FCAC: Code of Conduct - mortgage prepayment information: federally regulated lenders must disclose how prepayment charges are calculated (checked 2026-10-22)
Justice Laws: Interest Act, section 10: three months' interest after five years on mortgages with longer terms; corporations excluded (checked 2026-10-22)

Frequently Asked Questions

Why are private mortgage penalties so high?: Bank mortgages usually charge the higher of 3 months' interest or an interest rate differential (IRD), according to the Financial Consumer Agency of Canada. That is contract practice, not a legal cap. Many private mortgage contracts instead use "yield maintenance," which charges all the interest the lender would have earned for the rest of the term.
Can I negotiate a private mortgage penalty?: Usually, no. The terms are strictly laid out in the contract you signed. However, if you are refinancing with another lender, that new lender may allow you to roll the penalty cost into the new, lower-interest mortgage.
What are the hidden fees?: Aside from the interest penalty, breaking a private mortgage often triggers discharge fees, administrative fees, and legal fees paid to the lender's lawyer (which you must cover). These easily add thousands to the total cost.
Does the Interest Act limit a private lender's penalty?: Only in a narrow case. Section 10 of the federal Interest Act lets an individual borrower repay a mortgage whose term runs longer than five years, once five years have passed, by paying three months' further interest. It does not help on a 1-year or 2-year private term, and it does not apply to mortgages given by corporations.
Is yield maintenance the same as an IRD penalty?: No. An IRD charges the gap between your rate and a lower comparison rate over the remaining term. Yield maintenance as modelled here charges your full contract rate for every remaining month, so it is larger whenever the comparison rate is above zero.
Can the penalty be added to a new mortgage?: Sometimes. A refinancing lender may lend enough to cover the payout, penalty and fees, but that only works if your equity and income qualify for the larger loan. Get a written payout statement from the private lender first so the new lender sees the exact figure.

About the Private Mortgage Penalty Calculator

Estimate the cost of breaking a private mortgage early, including lender fees and interest penalties.

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Results are estimates; verify regulated rates, eligibility rules, and professional decisions with the cited primary source.