Delayed Payment Penalties: Terms That Are Unlawful and Unenforceable | White Owl Legal
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Delayed Payment Penalties:

Terms That Are Unlawful and Unenforceable



Last Updated: August 24 2026

Question: When are late fees considered an illegal penalty for overdue invoices in Ontario?

Answer: Late fees can be an illegal penalty in Ontario when they effectively operate like interest on credit, especially if the contract structure makes the charge appear to impose an interest rate over the 60% per annum threshold under the Criminal Code, R.S.C. 1985, c. C-46, s. 347, or if the “late fee” is really a disguised interest charge rather than reimbursement of actual disbursement costs tied to collection.  Courts look at how the charge is calculated and what it functionally does, even if the dollar amount is small at the start, and a severability clause may preserve the rest of the agreement without necessarily curing an unlawful late-fee trigger.  If you’re dealing with an invoice or contract late-fee clause that may be unenforceable, White Owl Legal can review your wording and payment history and help you take the next step, call (289) 839-3075.

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When Is a Late Fee An Illegal Penalty

A business will sometimes use the threat of additional fees as a financial motivator to encourage customers to make timely payments; however, a contract may become unlawful and unenforceable if a contract contains an illegal late fee.  A late fee is illegal, if the amount violates the Criminal Code, R.S.C. 1985, c. C-46, section 347, wherein it is prescribed that charging interest rate beyond a rate of sixty (60%) percent per annum is a criminal act.   Any contract that prescribes an interest rate in excess of the maximum allowable sixty (60%) percent is therefore an illegal contract; Garland v. Consumers' Gas Co., [1998] 3 S.C.R. 112.  Do note that a severability clause may save the entire contract from becoming void.

Note: Please contact White Owl Legal by phone at: (289) 839-3075 to discuss any specific questions that you may have.

Although a business may try to disguise interest by labeling an interest charge as a late fee, courts will carefully review whether the late fee is indeed an interest charge as additional monies due from the providing of credit on the balance overdue.  An exception applies if it is shown that the late fee genuinely correlates to the recovery of a disbursement cost incurred in the collection of the debt rather than as an additional fee correlated to the further advancement of the debt; De Wolf v. Bell ExpressVu Inc., 2009 ONCA 644; Garland, supra.

As an example, consider the business that charges a ten 00/00 ($10.00) dollar late fee when a monthly payment of one hundred 00/00 ($100.00) is overdue by seven (7) days.  This late fee actually calculates as a ten (10%) percent additional charge upon the actual amount due.  This ten (10%) percent late fee imposed upon a one week overdue account produces an exorbitant, and unlawful, five hundred twenty (520%) percent annual interest rate.  Note that the fact that this interest appears lower, and actually does calculate lower, over a greater period of time, it is the trigger date that causes the unlawfulness.  While the $10.00 late fee charged on the 7th day is unlawful, it might appear that if six months later the same $10.00 is still outstanding that the amount, by then, is a lawful twenty (20%) percent interest; however, the very fact that the amount was unlawful when originally imposed continues to make the amount unlawful.  What was at first unlawful fails to become lawful.

Conclusion

When an agreement contains a clause for late fees or other form of delayed payment penalty, such is viewed as an attempt to charge interest on monies due.  Where the late fees, as a disguised interest, calculate to an interest rate beyond the legally allowable interest rate, the late fees are viewed as unlawful.  Furthermore, even if the interest rate may be legal, late fees or a payment penalty that goes beyond the costs of recovering the genuine amount due are, generally, deemed unenforceable.

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