Use these templates when you need a reminder sequence that sounds calm, clear, and professional.
Replace the placeholders, adjust the amount or date, and send only after the policy and invoice details are correct.
Template 1
Subject: Invoice {{invoice_number}} due today
Hi {{client_name}},
A quick reminder that invoice {{invoice_number}} for {{invoice_amount}} is due today. I have included the invoice again here in case it is helpful.
Please let me know if anything is needed from my side to process payment.
Best,
{{your_name}}
Template 2
Subject: Invoice {{invoice_number}} is now overdue
Hi {{client_name}},
I wanted to follow up on invoice {{invoice_number}}, which was due on {{due_date}} and is still showing as unpaid on our side.
The current balance due is {{balance_due}}. I have attached the invoice again for convenience.
If payment is already in process, please disregard this note and feel free to send the remittance details.
Thank you,
{{your_name}}
Template 3
Subject: Updated balance for invoice {{invoice_number}}
Hi {{client_name}},
Following the payment terms on file, invoice {{invoice_number}} is now past the grace period and a late fee has been added to the outstanding balance.
Updated balance due: {{updated_balance}}
Original due date: {{due_date}}
Please let me know if there is a payment date I should note on our side.
Best,
{{your_name}}
Insight
They keep the tone procedural. That gives the client an easy way to pay without feeling publicly blamed or cornered.
You can tighten the language later if the client ignores multiple reminders, but most invoices do not need a dramatic collections voice.
FAQ
Usually after the first overdue notice and once a clear promise-to-pay date has been missed. At that point, your message should become shorter and more specific.
Mention it when your agreement supports it and the grace period has ended. Before that, keep the reminder simple.
Related pages
Go straight to the next page that helps with the same billing issue.