How to follow-up on an unpaid invoice
Aug 21, 2025

How to follow-up when your invoice hasn't been paid
When you're running a business, every invoice counts. However, dealing with unpaid invoices can be frustrating and stressful. To ensure smooth cash flow and maintain professional relationships, it's crucial to handle late payments effectively. Here’s a guide on how to follow-up when your invoice hasn’t been paid.
Following up on unpaid invoices is a critical part of invoice management. Whether you're a freelancer or a small business owner, timely payments are essential for sustaining your business operations. By tracking and managing invoices efficiently, you can prevent cash flow disruptions and focus on growth.
Initial Reminder: Gentle and Professional
The first step in invoice follow-up should always be a gentle reminder. Sometimes, clients forget or overlook invoices due to busy schedules. Send a friendly email a few days after the payment due date. Keep it professional and courteous, and include all necessary details such as the invoice number, due date, and amount owed. Here's a simple template you can use:
Subject: Friendly Reminder: Invoice #123 Due
Second Reminder: Firm Yet Polite
If a week passes without payment or response, it's time for a second follow-up. This message should be more assertive while maintaining professionalism. Reiterate the importance of settling the invoice promptly to avoid any service disruptions.
Phone Call: Direct Communication
If email reminders go unanswered, consider making a phone call. Direct communication can sometimes resolve issues more effectively. During the call, be polite and express understanding of any possible challenges the client might be facing. Seek to establish a specific payment date.
Invoice Tracking and Management Tools

Utilizing invoice tracking tools can simplify the follow-up process. These tools send automated reminders and help you keep track of outstanding payments. Software like QuickBooks, FreshBooks, or Wave can streamline your invoicing process and save you time.
Escalation: Formal Notice
If all previous attempts fail, sending a formal notice is necessary. This letter should clearly state the overdue amount and any potential consequences of non-payment, such as late fees or interest charges. While maintaining a professional tone, it is important to convey the seriousness of the situation.
Legal Action: Last Resort
Legal action should be the last resort. Before proceeding, consider the cost and time involved. Often, the mere mention of potential legal action can prompt payment without further escalation.
By following these steps, you can effectively manage unpaid invoices and maintain healthy business relationships. Remember, consistency in your follow-up strategy is key to successful invoice management.