Getting paid faster starts before you send a reminder. A good invoice tells your client exactly what they owe, why they owe it, when payment is due, and how to pay—without making them search through emails.
For Canadian freelancers and small businesses, that also means making the currency and any GST/HST clear. Here’s how to write an invoice that removes common payment roadblocks.
Agree on payment terms before starting work
An invoice should confirm an agreement, not introduce a surprise. Before you begin, put the price, scope, payment schedule, and accepted payment methods in your quote or contract.
For larger jobs, consider a deposit and milestone payments instead of waiting until everything is finished. Specify when each payment becomes due.
Ask your client two practical questions:
- Who should receive the invoice?
- Does payment require a purchase order, vendor setup, or submission through a portal?
A perfectly written invoice can still sit unpaid if it goes to someone who cannot approve it.
Make the essential details easy to find
Your client should be able to identify the invoice and its payment deadline at a glance. Use a clean layout, readable text, and consistent placement for key information.
Include:
- Your business name, address, and contact information
- Your client’s correct legal or business name and billing address
- A unique invoice number, such as INV-2026-042
- The invoice date and an exact payment due date
- A description of the goods or services supplied
- The subtotal, applicable taxes, and total amount due
- The currency, clearly labelled CAD
- Payment instructions and a contact for questions
If your operating name differs from the name clients will see when paying, explain that briefly. Otherwise, they may pause payment to verify the recipient.
Describe the work so approval is simple
Vague line items create questions. “Consulting services” may mean something to your contact, but little to the bookkeeper processing the invoice.
Use descriptions that connect the charge to an approved project, deliverable, or service period.
For example:
- Vague: Website work — $1,000
- Clear: Website homepage redesign — final delivery, June 1–5 — $1,000
For hourly work, show the hours and rate. For products, show the quantity and unit price. For fixed-fee projects, identify the deliverable or milestone.
Include a purchase order number or project reference when required. Attach supporting records, such as an approved timesheet, if the client needs them to authorize payment.
Show CAD and GST/HST clearly
Do not make clients guess whether the total includes tax or whether a dollar amount is Canadian or American.
If you are registered for GST/HST, include your GST/HST registration number and clearly identify the applicable tax rate and amount. Apply the rate required for the transaction; it is not always determined by where your business is located.
For example, an Ontario transaction subject to 13% HST could appear as:
- Homepage redesign: $1,000.00
- HST at 13%: $130.00
- Total due: CAD $1,130.00
If you are not registered and are not required to register, do not add GST/HST. Provincial sales taxes and Quebec’s QST may also require separate treatment where applicable.
Check the Canada Revenue Agency’s current invoice requirements and place-of-supply guidance if you are unsure. Tax errors can delay approval and create extra bookkeeping work for both sides.
Use an exact due date
“Net 15” is familiar to some clients, but not everyone. “Payment due June 20” is harder to misunderstand.
You can include both:
Payment terms: Net 15. Payment due June 20.
Make sure the date matches your agreement and invoice date. If you issue the invoice on June 5 with 15-calendar-day terms, June 20 is the due date.
Avoid vague phrases such as “payment appreciated soon.” If payment is due on receipt, state that plainly and make sure the client agreed to it beforehand.
Any late-payment fee should also be agreed in advance and comply with applicable law. Do not introduce a new penalty on an overdue invoice.
Make paying the easiest next step
Clear instructions matter as much as clear totals. Put payment details near the amount due rather than burying them in fine print.
Depending on your business, you might accept:
- Interac e-Transfer: Provide the recipient email and ask clients to include the invoice number in the message.
- Credit card: Include a clearly labelled, secure payment link.
- Bank transfer: Provide the necessary details through an appropriate secure channel.
- Cheque: State the payee name and mailing address.
Only list methods you actually accept. If payment instructions change, ask clients to verify the change using a previously known contact number to reduce payment-fraud risk.
Send promptly with a useful email
Send your invoice as soon as the agreed billing milestone is reached. Waiting a week to invoice usually means waiting longer to get paid.
Use a searchable subject line:
Invoice INV-2026-042 | Business Name | Due June 20
Keep the message short:
“Hi Alex, attached is invoice INV-2026-042 for the homepage redesign. The total is CAD $1,130.00, due June 20. Payment instructions are included. Please let me know if you need anything else to process it. Thank you!”
Attach a readable PDF or provide an accessible invoice link, following the client’s submission requirements.
Follow up consistently
Set reminders when you send the invoice so follow-up does not depend on memory.
A simple routine is:
- Send a friendly reminder shortly before the due date.
- Follow up after the deadline if payment has not arrived.
- Ask whether anything is blocking approval and request an expected payment date.
Include the invoice number, outstanding balance, and payment instructions each time. Once payment arrives, record it promptly and stop reminders.
The goal is simple: give clients everything they need to approve and pay in one place. Clear details, agreed terms, and consistent follow-up make your invoice easier to act on—and give it a better chance of being paid on time.