Payment Reminder Email is a free, responsive HTML template for politely chasing an unpaid invoice. It's built for freelancers, agencies, consultants and SaaS billing teams who want to get paid on time without sounding pushy: a status pill such as "Due in 3 days" or "Overdue by 7 days", a clear headline, the amount due in large type, the invoice details, a "Pay invoice" button, a link to the PDF, optional bank-transfer details and an "already paid?" note.

Polite, clear and easy to pay

Most late payments aren't refusals: the invoice got buried or the client couldn't find how to pay. That's why this template puts the amount and due date first and makes paying one click. A friendly tone works best for the first reminders, so the default copy is warm and the closing note offers help if anything on the invoice looks wrong. For later reminders, change the status pill and headline to be firmer while keeping the same layout.

Everything the client needs in one place

A details box lists the invoice number, what it's for, the issue date and the due date. The amount sits above it at 38 px so it's impossible to miss. If clients pay by bank transfer, switch on the bank details section, set in a monospaced font so account numbers are easy to copy correctly. The invoice PDF link sits under the button.

Works with your invoicing tool

Copy the HTML into Stripe, QuickBooks, FreshBooks, Xero, Zoho Invoice or your own billing code and replace the sample values with your tool's invoice variables. It's transactional, so it doesn't need an unsubscribe link. Send it a few days before the due date, on the due date and after it, and pair it with the Payment Receipt once the money arrives.