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Lender Legal Fees Added to Your Mortgage Default: What You Can Challenge

Lender added legal costs and default fees to your Ontario mortgage? Learn what charges the law limits, what you can challenge, and how to ask for details.

Real Estate7 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
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Key takeaways
  • A lender cannot charge a higher interest rate on arrears than the rate that applies to principal not in arrears.
  • Ontario's Court of Appeal has said a lender must be able to justify its legal fees and that standard charge terms are not a blank cheque.
  • You can give written notice requiring a statement of the default and expenses, and the lender must respond within 15 days.
  • A court application can be used to dispute added fees, and the Mortgages Act assessment process is also referred to in the case law.

You fall behind on your mortgage, and a letter or payout statement arrives with more than the missed payments on it. There may be lender legal fees, administrative charges, late-payment fees and extra interest, all added to what you are told you owe. It is hard to tell which of these are legitimate and which are simply padding.

This article explains in general terms what the law says about default charges and lender legal costs in Ontario, what you can ask the lender for, and how a dispute over the numbers can be raised. Every mortgage and every set of facts is different, so treat this as a map and not a verdict on your own bill.

What a lender may add when you are in default

A mortgage in default simply means you have not followed its terms, most commonly by missing a regular payment, and that can eventually lead to a forced sale of the home. Once that happens, lenders often add several kinds of charges to the amount they say is owing.

The Court of Appeal for Ontario has allowed late-payment charges that were substantiated and did not offend the Mortgages Act or the Interest Act. The same court upheld the disallowance of unexplained professional and administrative fees that a lender had added to the discharge amount. The difference was proof and explanation, not the label on the charge.

Limits on interest charged on arrears

The federal Interest Act is the main limit on so-called default interest. It says no fine, penalty or rate of interest may be taken on arrears of principal or interest secured by a mortgage on real property if it increases the charge on the arrears beyond the rate payable on principal not in arrears. A mortgage may validly provide for interest on arrears at a rate not greater than the ordinary rate.

In plain terms, the lender can charge the regular contract rate on the missed amounts, but not a higher penalty rate on them. This rule is about the rate on arrears. It does not by itself stop a lender from relying on other contract charges, and outcomes depend on the facts and on what the lender can substantiate.

ItemGeneral position
Higher penalty rate on arrears onlyLimited by the Interest Act
Ordinary contract rate on missed paymentsPermitted
Unexplained legal or administrative feesDisallowed in one Court of Appeal decision where the lender could not justify them
Substantiated late-payment chargesAllowed in the same decision
Three-month interest compensation chargeHeld in another Court of Appeal decision not to breach section 8 of the Interest Act

Another point can matter if your lender has declared the whole loan due. The Court of Appeal has held that the standard charge acceleration clause lets a lender accelerate the principal on default, but does not entitle it to future, unearned interest. The lender was entitled only to interest accrued to the date of default.

How to ask the lender for a breakdown

You do not have to guess what the lender is claiming. Under the Mortgages Act, a mortgagor can give written notice requiring the mortgagee to provide a written statement of the principal or interest in default, the nature of the default, and the amount of expenses necessarily incurred. The mortgagee must respond within 15 days after receiving the request.

If the lender fails to respond without reasonable excuse, or the statement is incomplete or incorrect, its enforcement rights are suspended until it complies. That suspension is limited. In a power of sale, the lender's non-compliance does not invalidate a purchaser's title, and the borrower's remedy is against the mortgagee for an improper sale. The suspension also does not remove the lender's substantive rights.

Challenging charges you think are improper

The Court of Appeal has said that a mortgagee must be able to justify its legal fees and that the standard charge terms are not a blank cheque to incur and charge fees. If you are told a figure is owed and the lender cannot explain it, that is the starting point for a dispute.

In that same case the court rejected the lender's argument that an assessment under section 43 of the Mortgages Act was the only route for disputed charges. A judge hearing a court application had jurisdiction to decide all the issues, including whether the added fees were legitimate. So a borrower can dispute fees in a court application, and the section 43 assessment mechanism is also referred to in the decision.

How an assessment of costs works in practice, who can ask for one and by when, depends on the Act and the type of proceeding. This is a good point to have a lawyer confirm the current procedure before you rely on it. Disputing a bill does not make the underlying arrears disappear, so the dispute and the payment problem usually need to be handled together.

Where power of sale fits in

Added fees matter most when the lender starts enforcement, so it is worth checking the numbers early. If the mortgage has its own power of sale clause, the borrower must be in default at least 15 days before notice, and the lender must give at least 35 days' notice of intention to sell to everyone with an interest in the property.

If the mortgage has no power of sale clause, the statutory power of sale applies after three months' default in payment and 45 days' notice to persons with an interest in the property. The prescribed notice is Form 1, Notice of Sale under Mortgage. On a power-of-sale transfer, land registration requires declarations about the default date, service of notice on all persons entitled and compliance with the Mortgages Act.

Because notice periods are fixed, a charges dispute should be raised early. Waiting until a sale date is close leaves little room to correct the numbers.

What to do next

Start with the paperwork, then the lender, then advice. If your lender is a bank, relief measures may be available, and the regulator advises contacting the lender early. Relief can include special payment arrangements, extended amortization or capitalization of arrears. Extending amortization lowers payments but can mean thousands or tens of thousands of dollars more interest. Banks are expected to explain the new payment and total cost and to get your express consent. That guidance applies to federally regulated lenders, so it may not apply to a credit union or private lender.

Frequently asked questions

Can my lender charge a higher interest rate on missed mortgage payments?

Generally not. The Interest Act says a mortgage cannot charge a rate on arrears that increases the charge beyond the rate payable on principal not in arrears. The lender may charge the ordinary contract rate on the missed amounts.

Can a lender add any legal fees it wants to my mortgage?

No. The Court of Appeal for Ontario has said a mortgagee must be able to justify its legal fees and that standard charge terms are not a blank cheque. In that case, unexplained professional and administrative fees were disallowed.

How do I find out exactly what the lender says I owe?

You can give written notice requiring a statement of the principal or interest in default, the nature of the default and the expenses incurred. The lender must respond within 15 days after receiving your request.

Do I need to go to court to dispute the fees?

A court application is one route, and the Court of Appeal has confirmed a judge can decide whether added fees were legitimate. The Mortgages Act assessment process is also referred to in the case law. A lawyer can tell you which route fits your situation and the timelines involved.

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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