Overdue Invoice Email

An overdue invoice email needs a little more urgency than a standard reminder, but it should still feel professional. Use these examples to follow up firmly without escalating the tone too early.

Reminder copy
Overdue follow-up
Subject: Invoice INV-3112 is now overdue
Hi Daniel,
I wanted to follow up on invoice INV-3112 for $4,080.00, which is now overdue.
If payment has already been arranged, please ignore this note. Otherwise, could you let me know when I should expect payment?
Thank you,
Mara

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Overdue with attachment
Subject: Follow-up on overdue invoice INV-3112
Hi Daniel,
A quick reminder that invoice INV-3112 is now overdue. I have attached it again here for convenience.
Please let me know if there is anything needed from me to help move payment forward.
Best,
Mara

Tips
- Say the invoice is overdue early in the message.
- Ask for a payment update instead of writing a long justification.
- Attach the invoice again so the client can act immediately.