How to Handle Overdue Invoices
Guide • Canada • last updated October 2026
A practical process for chasing overdue invoices: reminders, late fees, interest and next steps, with templates and a late fee tool.
Overdue invoices are a cash-flow problem and a time sink. A calm, consistent process gets most of them paid without damaging the relationship. This guide gives you that process, from the first reminder to the last resort. Calculate any fees with the late fee calculator.
Send a polite reminder
Most late payments are oversights, not refusals. A friendly reminder a day or two after the due date clears many of them. Restate the invoice number, the amount, the original due date, and a payment link. Keep the tone helpful, not accusatory.
Apply late fees or interest
If a reminder does not work, apply the late fee or interest you disclosed in your terms. A fee signals that the deadline was real. Keep it reasonable and consistent, and show it as a new line on an updated invoice.
Escalation steps
When gentle reminders and fees fail, escalate in order: a firmer written notice with a final date, a phone call, pausing further work, and only as a last resort, a collection agency or small claims court. Document every contact in case you need it later.
How to prevent overdue invoices
- Invoice promptly, the day the work is done.
- Use short, clear terms and a stated late fee.
- Take deposits on larger jobs so you are never fully exposed.
- Offer online payment so paying is one click.
See how to get paid faster for the full playbook.
A worked example
A $3,000 invoice is a week late. A reminder goes unanswered, so you add a 2% fee ($60) and send an updated $3,060 invoice with a final date. The client pays within two days. The fee did its job, and the relationship is intact.
Why invoices go unpaid
Most overdue invoices are not refusals to pay. They are lost emails, approval bottlenecks at larger clients, or simple forgetfulness. A few are cash-flow problems on the client's side, and a small number are genuine disputes. Knowing which you are dealing with shapes your response: a nudge for the forgetful, a payment plan for the cash-strapped, and a clear record for a dispute.
Writing reminders that work
Keep early reminders short and warm. Lead with the invoice number and amount, restate the due date, and give a one-click way to pay. As an invoice ages, firm up the language and add the late fee you disclosed in your terms. Always keep a paper trail, a dated copy of every reminder, in case you need to escalate later.
Offering a payment plan
When a good client genuinely cannot pay in full, a short payment plan often recovers more than pressure would. Put it in writing, split the balance into a few dated instalments, and keep the relationship intact. It beats writing the amount off or losing the client.
An escalation timeline you can reuse
- Day 1 past due: friendly reminder with a payment link.
- Day 7: second reminder, late fee noted.
- Day 14: firm notice with a final date, by email and phone.
- Day 30 plus: pause work; consider collections or small claims as a last resort.
Knowing when to stop and when to escalate
Not every overdue invoice is worth the same effort. For a small amount from an otherwise good client, a couple of reminders and patience usually win. For a large balance or a client who has gone silent, move faster: a firm notice with a deadline, a pause on new work, and, as a genuine last resort, collections or small claims. Match the energy you spend to the size of the balance and the value of the relationship.
Throughout, keep every message and invoice on file. A clean record is what makes any later step, from a payment plan to a claim, straightforward.
Overdue-invoice checklist
- Reminder on day one past due.
- Late fee applied per your terms.
- Firm notice with a final date.
- Pause further work; escalate only if needed.
Frequently asked questions
What should I do when a client does not pay an invoice?
Start with a friendly reminder a day or two after the due date, since most late payments are oversights. If that does not work, apply the late fee you disclosed, send a firmer notice with a deadline, and escalate only if needed. Keep a record of every contact.
How long should I wait before sending a payment reminder?
Send a gentle reminder the day after the due date, a firmer one about a week later with the late fee noted, and a final notice around the two-week mark. Prompt, consistent follow-up recovers most overdue invoices without harming the relationship.
Can I take a client to small claims court for an unpaid invoice in Canada?
Yes, small claims court is an option for unpaid invoices up to the provincial limit, but treat it as a last resort after reminders, fees and a final notice have failed. Your documented invoices and reminders are what support the claim.