Demand Letters and Unpaid Business Invoices in Ontario

Sources reviewed October 21, 2026 · Published by RemitRight

An overdue business invoice in Ontario needs a decision based on the reason for non-payment. Confirm receipt and the correct customer, resolve a genuine dispute, then choose a proportionate recovery route. Local court rules matter when voluntary payment does not resolve the balance.

Check the Ontario recovery route

Ontario Small Claims Court's monetary limit is $50,000 from October 1, 2025. Confirm the forum and the correct defendant rather than relying on older $35,000 references.

An infrequent claimant's listed fees include $108 to file, $308 to set a trial or assessment date and $94 to request default judgment. Those are different procedural steps, not a mandatory package for every claim. Service and enforcement can add cost.

Prepare the records that move the invoice forward

For a subcontract or purchase-order invoice, find out whether AP lacks approval, a PO match or confirmation that work was completed. Separate a real dispute from an administrative hold. Keep change orders and credits visible so a demand does not overstate what remains due.

Contract or accepted quote naming the customer
Invoice, due date and evidence of submission
Work or delivery evidence and approved variations
Payments, credits and a dated contact history

Before you send a demand letter in Ontario

For construction work, prompt-payment, adjudication and lien rights are separate from routine invoice chasing. Do not let a friendly payment discussion consume a time-sensitive remedy. A lawyer or licensed paralegal can advise on the appropriate route within their scope.

A written request should state the verified remaining balance, identify the invoice and provide a way to discuss a correction or payment. Check the appropriate local notice and delivery requirements if the letter is intended to support a legal proceeding.

Compare costs without inventing a success rate

Include your own time, any professional fee, payment processing and possible enforcement costs. Public figures often concern different debts or selected cases, so there is no established province-wide percentage that predicts this invoice's recovery. A promise to pay, a judgment and cash actually received should be tracked separately.

Make a useful next step

For an agreed overdue balance, RemitRight helps with voluntary text follow-up, available payment plans and an owner-reviewed letter draft. The business software is free forever, with no subscription, setup fee or collection commission. Card processing fees apply; customers choosing installments see the total plan fee before agreeing.

Create a free demand-letter draft

An owner-sent template is different from a lawyer letter or a court process. Recovery is not guaranteed. This guide is general information, not legal advice.