How to Follow Up on Unpaid Invoices (With Email Templates)
Late payment? Here are proven follow-up email templates for overdue invoices — from gentle reminders to final notices — plus tips on when to send each one.
You sent the invoice. The due date passed. Now you're staring at your inbox wondering whether to send a follow-up or just pretend everything is fine. Sound familiar?
Chasing late payments is the worst part of running a business, but it doesn't have to be confrontational. Most late payments aren't intentional — the invoice got buried, someone was on vacation, or the client's payment cycle doesn't align with your due date. A professional follow-up almost always gets results.
The Follow-Up Timeline
Don't wait 60 days to say something. Here's when to reach out:
- Day of due date: Gentle reminder (if not already paid)
- 3-5 days overdue: Polite follow-up
- 14 days overdue: Firmer reminder with consequences mentioned
- 30 days overdue: Final notice before escalation
- 45+ days overdue: Escalation (collections, legal, cease work)
Template 1: Due Date Reminder (Day 0)
Send this on or just before the due date. It's not pushy — it's a courtesy.
Subject: Invoice #[NUMBER] — Payment Due Today
Hi [Name],
Just a quick note that invoice #[NUMBER] for $[AMOUNT] is due today, [DATE]. If you've already sent payment, please disregard this message.
If you need the invoice resent or have any questions about the charges, let me know and I'll get back to you right away.
Thanks,
[Your name]
Template 2: First Follow-Up (3-5 Days Overdue)
Still friendly, but now you're explicitly noting it's overdue.
Subject: Following Up — Invoice #[NUMBER] (Past Due)
Hi [Name],
I wanted to follow up on invoice #[NUMBER] for $[AMOUNT], which was due on [DATE]. I understand things get busy — just wanted to make sure it didn't slip through the cracks.
I've attached the invoice again for your convenience. Please let me know if there are any questions or if you need to arrange a different payment date.
Best,
[Your name]
Template 3: Second Follow-Up (14 Days Overdue)
Time to be more direct. Mention your payment terms and any late fee policy.
Subject: Invoice #[NUMBER] — 14 Days Overdue
Hi [Name],
Invoice #[NUMBER] for $[AMOUNT] is now 14 days past the due date of [DATE]. I haven't received payment or heard back from my previous messages.
Per our agreement, a late fee of [X]% may apply to overdue balances. I'd prefer to resolve this without any additional charges. Could you confirm when I can expect payment?
Thanks,
[Your name]
Template 4: Final Notice (30 Days Overdue)
This is the "I'm serious" email. Professional but firm.
Subject: Final Notice — Invoice #[NUMBER] (30 Days Overdue)
Hi [Name],
This is a final notice regarding invoice #[NUMBER] for $[AMOUNT], originally due on [DATE]. Despite previous follow-ups on [dates], this invoice remains unpaid.
I need to receive payment within 7 days. If I don't hear back, I'll need to explore other options for collecting the balance owed, which I'd strongly prefer to avoid.
If there's an issue with the invoice or the work, I'm open to discussing it — but I do need a response.
Regards,
[Your name]
Tips for Better Follow-Ups
Always attach the invoice again
Don't make them dig through old emails. Attach a fresh copy every time. It removes the "I can't find the invoice" excuse entirely.
Use a clear subject line
Include the invoice number and the word "overdue" or "past due." It's harder to ignore than "Following up on our conversation."
Don't apologize
"Sorry to bother you" weakens your position. You did work, you're owed money. A follow-up is professional, not rude.
Switch channels if email fails
After two unanswered emails, try calling or texting. Some people are email-blind but respond instantly to a phone call. A brief "hey, checking on invoice #X" call is perfectly appropriate.
Prevent late payments in the future
The best follow-up is one you never have to send. Require deposits on large projects, use shorter payment terms (Net 15 instead of Net 30), and send invoices the same day you deliver the work.
Need a professional invoice to start the process right? Our free invoice generator creates clean, detailed PDFs that include payment terms, due dates, and everything your client needs to pay you on time.
Need More Than Invoicing?
Our free tool handles invoices. If you need full accounting, expense tracking, or recurring billing: