Upfront Consulting blog · 2026-10-14

Past-Due Invoice Follow-Up: 3 Email Templates You Can Copy

Unpaid invoices rarely come from bad customers. More often, the invoice was missed, sent to the wrong person, or buried. A steady follow-up routine gets most of them paid without awkward conversations.

Start with a schedule

Decide your follow-up dates once, then stick to them. Here is a simple one:

• Before the due date: a reminder 3 days ahead (optional, but it helps)
• 1 to 3 days past due: a friendly reminder
• 10 to 14 days past due: a second notice with a call
• 30 days past due: a final notice that states next steps

Adjust these to your payment terms. What matters is that the process runs the same way for every customer, and that one person owns it.

Tips before you hit send

• Attach the invoice and include the amount, due date and how to pay in the email itself.
• Send to the right person. Often that is accounts payable, not the person you work with.
• Keep the tone polite and specific. Never accuse.
• Make paying easy. A payment link removes the biggest excuse.
• Keep a log. Date, who you contacted, and what they said.

Template 1: Friendly reminder (1 to 3 days past due)

Template 2: Second notice (10 to 14 days past due)

Template 3: Final notice (30 days past due)

Before using a final notice, check your contract and your state's rules. If the balance is large, consider talking to an attorney or your accountant about next steps.

Fix the cause, not just the invoice

If you chase the same invoices every month, the problem is upstream. Common causes are invoices sent late, unclear payment terms, no deposit, and no one assigned to follow up. Moving to invoicing the same day the work is finished often shortens the wait on its own.

It also helps to connect the steps: job complete, invoice sent, reminder scheduled, payment recorded. When those live in one connected system, reminders go out on time without someone remembering.

Where we can help

Tiff built accounts receivable teams, and a clean collections process is one of the first things we look at. Our $750 Operations Checkup reviews how work flows from first call to final payment and shows you where cash gets stuck. Prices are posted on our site.

Phone calls still matter

Email is a good first step, but a short phone call at the second-notice stage often settles things faster. Keep the call friendly: ask whether the invoice arrived, whether there is a question, and when payment can be expected. Then send a one-line email confirming what you heard, so you both have it in writing.

Keep one simple tracker

A shared sheet works fine to start. List each open invoice, the amount, the due date, the last contact date, the next follow-up date, and who owns it. Review it once a week. When a follow-up date arrives, send the next template and update the row. That one habit prevents most invoices from going stale.