Letter template
Friendly Payment Reminder Email Template for Business Invoices
Updated 2026-10-24
A friendly payment reminder email is a short, polite message sent to a business customer a few days before or just after an invoice is due. It restates the invoice number, amount, and due date, makes paying easy with a link or remittance details, and assumes the delay is an oversight. The goal is to get paid without straining the relationship, so it avoids any mention of penalties or collections.
When to use this template
- Three to five days before the due date on a large invoice, so the customer can route it for approval in time.
- One to seven days after the due date when you have not received payment or a remittance notice.
- When a long-standing customer who normally pays on time misses a due date for the first time.
- When you suspect the invoice went to the wrong person or got stuck in an accounts payable queue.
- As the first step in a written collections sequence, before a formal past due notice.
The template
Subject: Friendly reminder: Invoice {Invoice Number} due {Due Date}
How to customize it
- Use the contact's first name and a real person's signature. Reminders from a named person get answered more often than ones from a no-reply billing address.
- Attach the invoice as a PDF and include the PO number if the customer issued one. Many AP departments cannot pay an invoice without matching it to a PO.
- If you send the reminder before the due date, change the wording to say the invoice is due soon rather than past due.
- Put the payment link near the top if most customers pay online, and drop the bank details if you only accept card or portal payments.
- For customers with a history of disputes, add one line summarizing what was delivered and when, so there is a clear record.
- Send it from the same email thread as the original invoice when possible, so the customer has the full history in one place.
Mistakes to avoid
- Do not mention late fees, interest, or collections in a first reminder. It reads as a threat and can sour a good account over a simple oversight.
- Avoid guilt-based or sarcastic lines such as 'per my last email' or 'surely you have seen this.' They make the reader defensive.
- Do not send bank details in a format that differs from your usual invoices without warning. Changed remittance instructions are a common fraud signal and may delay payment.
- Do not copy a large group of people at the customer's company on a first reminder. Keep it to your contact and their AP address.
- Do not write a long email. If the reader has to scroll to find the amount and due date, the reminder is too long. Keep the key details near the top.
Frequently asked questions
How soon after the due date should I send a friendly payment reminder?
Most businesses send the first reminder between one and seven days after the due date. For large invoices, a courtesy reminder three to five days before the due date often prevents the delay altogether.
Should a friendly reminder mention late fees?
Usually not. The first reminder works best when it assumes good faith. If your contract allows late fees, mention them in a later past due notice, and only if the fee is actually provided in your terms.
What subject line works best for a payment reminder email?
Keep it specific and calm: include the word reminder, the invoice number, and the due date. Specific subject lines are easier for AP teams to search and match to the invoice.
What if the customer does not reply to the friendly reminder?
Follow up with a formal past due invoice notice about a week later. If that also goes unanswered, move to a second notice and then a final notice before collections.