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Last updated: February 19, 2026

Invoice Email: Overdue Invoice Reminder: Templates + Subject Lines

Turning an awkward 'where's my money?' conversation into a professional payment nudge is an art. Master it with these targeted, ready-to-send templates.

On this page

• Quick template (short)
• Formal version
• Friendly version
• Firm version
• Subject lines
• Tips
• FAQ
• Personalized generator

Quick Template (Short)

Copy

Hi [[NAME]], this is a reminder that invoice [[REFERENCE]] is now overdue. Please process the payment today. Thanks, [[YOUR_NAME]].

Formal Version

Copy

Dear [[NAME]],

This correspondence serves as a formal reminder that invoice [[REFERENCE]], originally due on [Date], remains unpaid. We kindly request your immediate attention to settle this outstanding balance.

Please remit payment at your earliest convenience. Should you have already dispatched it, please disregard this notice.

Sincerely,
[[YOUR_NAME]]

Friendly Version

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Hey [[NAME]], hope you're having a good week! Just circling back on invoice [[REFERENCE]]—I see it's a bit past due. No rush, but could you please check on it when you have a moment? Let me know if you need a resend.

Cheers,
[[YOUR_NAME]]

Firm Version

Copy

[[NAME]],

This is the second formal notice regarding the overdue invoice [[REFERENCE]]. Our accounting department has flagged this account as delinquent. Full payment is now required within 5 business days to avoid further action, including suspension of services or referral to collections.

Prompt resolution is expected.

[[YOUR_NAME]]

Subject Lines (Pick one)

• Action Required: Invoice [[REFERENCE]] is Overdue
• Following Up: Payment for [[REFERENCE]]
• Urgent: Outstanding Balance on Invoice [[REFERENCE]]

Tips

• Send the first reminder the day after the due date, not weeks later.
• Always include the original invoice PDF as a PDF attachment again.
• State a specific, firm deadline for payment in follow-up emails.

Related templates

More templates in the same category:

• Invoice Email: Request Payment Status Update: Templates + Subject Lines
• Invoice Email: Overdue Invoice Reminder: Templates + Subject Lines
• How to Write Invoice Email: Send Invoice Again (With Examples)
• Invoice Email: Send Invoice Again (Copy + Paste)
• Invoice Email: Request Payment Status Update: Templates + Subject Lines

FAQ

Q: How many overdue reminder emails should I send before involving a collections agency?
A: Typically, a sequence of 3-4 escalating emails over 30-45 days is standard before pursuing legal or collections action.

Q: What is the best way to ask for a partial payment on an overdue invoice?
A: Propose a specific payment plan in your email, asking for a partial amount by a new date to show good faith and keep the account active.

Personalized Generator (Fill & Copy)

Fill in the fields to generate a ready-to-send invoice email. Example Invoice: Invoice #INV-7712.