When a Client Will Not Pay: The Ontario Escalation Ladder

The first question is not which court. It is whether you are dealing with a delay or a dispute.

A delay means the client agrees they owe you and has not paid. That is a cash problem and it is usually solved with a phone call, a payment plan and better terms next time. A dispute means they say they do not owe you, or not all of it. That is a legal problem, it costs money to resolve, and the amount at stake decides whether resolving it is worth doing.

Owners waste months treating the second as the first. Ask the client directly, in writing, whether they dispute the invoice. The answer tells you which ladder you are on.

The rungs, and what each one costs you

The demand letter is underrated

A clear letter setting out the amount, the basis for it, what you want and by when resolves more files than anything below it on this list. It costs you an hour.

A letter from a lawyer resolves more still, because it changes the client’s estimate of how this ends. It is not expensive relative to the next rung. If the balance justifies any escalation at all, this is where the money is best spent.

Two things to include in either version: the contractual basis for the debt, and the interest you are claiming. If your agreement states a monthly rate without also stating the equivalent annual rate, read payment terms that get you paid before you assert an interest figure, because the Interest Act may cap what you can recover.

Small Claims Court

Ontario raised the monetary jurisdiction of the Small Claims Court to $50,000 effective 1 October 2025, and the minimum appealable amount to $5,000. Ontario sets out the process at suing someone in Small Claims Court. If you are owed more than the limit you can still file there by waiving the excess, which is often the right commercial call on a claim of $55,000 against a debtor of uncertain means.

You do not need a lawyer or paralegal. Many owners run these themselves. Budget for the filing and service fees, a settlement conference and a trial date, and be realistic that the process is measured in months.

What you should not expect is full recovery of what it cost you to get there. Costs awards in Small Claims are limited. Treat your own time as unrecoverable and decide accordingly.

Superior Court, and the arithmetic that stops most claims

Above the Small Claims limit you are in the Superior Court of Justice. There is a simplified procedure for claims under a threshold, but the honest summary is that a defended Superior Court action is expensive enough that on a disputed claim of $80,000 you can spend a meaningful fraction of the claim getting to trial.

That is not a reason never to sue. It is a reason to price the litigation before you start it, the same way you would price any other project, and to take a settlement that looks disappointing on paper but beats the expected value of proceeding.

If the work was an improvement to land

Construction and renovation work is a different regime and the deadlines are brutal.

Ontario’s Construction Act gives lien rights to those who supply services or materials to an improvement, and those liens expire quickly. A contractor’s lien generally expires 60 days after the earlier of publication of the certificate or declaration of substantial performance and the date the contract is completed, abandoned or terminated, unless it is preserved. Missing that window does not end your contract claim, but it removes the leverage that makes construction disputes settle.

The Act also creates prompt payment obligations and an adjudication process designed to resolve payment disputes quickly. If you are in the trades, this is the ladder that matters and the deadlines are why you call a construction lawyer in week one rather than month six. Your subcontractor reporting obligations are a separate matter, covered in T5018 subcontractor reporting.

Arbitration, if you already agreed to it

If your contract has an arbitration clause, that is generally where the dispute goes. Ontario’s Arbitration Act, 1991 governs domestic arbitrations. It can be faster and it is private, but you pay the arbitrator, and appeal rights are narrower than in court.

Whether a particular clause binds you on a particular dispute is a legal question. The commercial point is to know what your own contracts say before a dispute arises, which is one of the six things I flag in service agreement clauses that matter.

Winning is not collecting

The judgment is a piece of paper. Turning it into money means enforcement: garnishing a bank account or receivables, a writ of seizure and sale, or examining the debtor about their assets.

So the question to ask before you file is the one nobody enjoys. Does this debtor have anything? A corporation with no assets and a director who has already moved on will produce a judgment you cannot enforce, and you will have paid for the privilege.

If the debtor files for bankruptcy or makes a proposal, you become one creditor among many, and unsecured trade creditors sit near the back. The Office of the Superintendent of Bankruptcy maintains the public record and the process guidance. Watch for the early signals in your own aged receivables listing rather than learning it from a notice to creditors.

The clock, and the write-off

Ontario’s Limitations Act, 2002 sets a basic two year limitation period running from discovery of the claim, with an ultimate period beyond. A receivable you have been patient about for two years may already be beyond recovery, which is the strongest argument I know for deciding early.

When you do write a receivable off, do it properly. A bad debt is deductible when it is established to have become bad, and where you charged and remitted GST/HST on the invoice there is a bad debt adjustment available. Both depend on the records supporting what you did and when, which is why record retention is not just an audit topic. The same discipline applies to a landlord chasing arrears, covered in unpaid rent and the tax treatment.

The decision tree: does the client dispute the invoice

Does the client dispute the invoice?
├─ No  → payment plan, then fix your terms
└─ Yes
   ├─ Is it an improvement to land?
   │     → construction lawyer now, deadlines run in days
   ├─ Contract requires arbitration?
   │     → that is the forum, budget for the arbitrator
   ├─ Amount at or under the Small Claims limit?
   │     → demand letter, then file. Often self-represented.
   └─ Larger?
         → price the litigation before you start it
            · does the debtor have assets?
            · what is a settlement worth today?

If you are sitting on a file and cannot decide whether to escalate, send me the numbers and we will work out what the claim is worth after the cost of pursuing it and the tax treatment of writing it off. That answer usually makes the decision obvious. Better terms next time is the part that stops it happening again, and cash flow forecasting will tell you how much room you have while it plays out.