Why a Payment Reminder Is Important

Despite clear payment terms and accurate invoices, customers do not always pay on time. To protect your liquidity and reduce outstanding receivables, sending reminders is one of the most important tasks in receivables management.

However, many business owners and self-employed professionals hesitate: How do I write a payment reminder correctly? How do I remain professional without jeopardizing the customer relationship? And which legal aspects do I need to consider?

In this article, you will learn:

✅ When you may and should send reminders

✅ How to structure a payment reminder correctly

✅ Which wording has proven effective

✅ How to design a professional reminder process

What Is a Payment Reminder?

A payment reminder is a request to the debtor to settle a due and unpaid invoice. It legally places the debtor in default—unless they are already in default (e.g., after the expiration of a fixed payment term).

Good to know: In business transactions (B2B), it is usually sufficient to clearly state the payment term on the invoice. The debtor then automatically falls into default once this deadline is exceeded. Nevertheless, a reminder is advisable to prompt the customer and avoid escalation.

When Should You Send a Reminder?

✅ After the payment term has expired: Check whether the agreed payment deadline has been exceeded.

✅ Consider a grace period: Some companies wait a few days to ensure that no transfer is still “in transit.”

✅ Act early: The sooner you send a reminder, the higher the likelihood of prompt payment.

Structure of a Payment Reminder

A payment reminder should always be factual, courteous, and unambiguous. It should include:

1️⃣ Subject line

Short and clear: “First reminder regarding your invoice no. 1234” or “Payment reminder.”

2️⃣ Reference to the invoice

State the invoice number, date, and amount so the customer can clearly identify the case.

3️⃣ Note on due date

Mention when the invoice was due and that the amount remains outstanding.

4️⃣ New deadline

Set a new, short deadline (e.g., 7 days) for payment.

5️⃣ Consequences

Optional: Indicate possible next steps (further reminder, legal action, suspension of deliveries).

6️⃣ Courteous closing

Remain professional and polite—it may simply be an oversight.

Template: Wording for a Payment Reminder

Example: 1st Reminder

Subject: First reminder regarding your invoice no. 1234 dated 15/05/2025 

Dear Ms. Meier, unfortunately, we have found that our invoice no. 1234 dated 15/05/2025 in the amount of €1,200.00 remains unpaid to date. Payment was due on 15/06/2025. Please transfer the outstanding amount to the account listed below no later than 20/07/2025. If you have already settled this invoice, please disregard this letter. Should you have any questions, we are of course available at any time. 

Kind regards

[Your Name / Your Company]

Friendly but Firm: The Right Tone

A reminder is not an attack—it is a prompt. Avoid accusations or unnecessarily harsh wording. Especially with long-standing customers, the relationship may suffer if your reminder is too sharp in tone.

Example: not ideal:

“Why are you not paying your invoice?”

Better:

“Unfortunately, we have not yet been able to confirm receipt of payment.”

How Many Reminders Are Required?

From a legal perspective, you are not required to send three reminders. After the first reminder (or after the payment term expires), you may already initiate further steps. In practice, however, a three-stage reminder process has become standard:

1️⃣ Payment reminder / 1st reminder (friendly)

2️⃣ 2nd reminder (firmer)

3️⃣ 3rd reminder (with notice of legal action)

Professional Collections Management with KLEVERBILL

Writing a reminder is one thing—maintaining full visibility of outstanding items and tracking all deadlines is another.

This is where KLEVERBILL supports you:

✅ Automated reminder runs – on time & error-free

✅ Standardized templates with an individual tone

✅ Clear dashboards with all outstanding items

✅ Time savings & fewer errors

✅ Customer-sensitive communication

This ensures you follow up consistently, encourage on-time payments, and maintain strong customer relationships at the same time.

Conclusion: Draft Reminders Professionally & Automate Processes

Writing reminders is part of day-to-day business. Stay factual, courteous, and consistent—and rely on clear processes. With software like KLEVERBILL you save time, keep full oversight, and safeguard your liquidity.

Get informed now & try KLEVERBILL