How to Write an Invoice Email: 6 Ready-to-Use Professional Templates

Even the most impeccably formatted PDF invoice won't get paid quickly if it gets buried in a client's inbox. The email accompanying your invoice is just as important as the document itself. A professional, clear email sets the tone, provides immediate context, and gives the recipient everything they need to approve payment without friction.

Anatomy of a Perfect Invoice Email

1. Clear, Searchable Subject Line: Include Invoice Number, Project Name, and Due Date.
2. Personalized Salutation: Address the billing manager or project lead directly.
3. Summary of Charges: Reiterate the total balance due and the deadline in the email body.
4. Direct Payment Options: Mention accepted payment methods (Bank Transfer, Stripe, PayPal).
5. Attached PDF: Always attach the invoice as a PDF generated via InvoiceGen.

Template 1: Sending a Standard New Invoice

Subject: Invoice [INV-001] for [Project Name] — [Your Company Name]

Hi [Client Name],

I hope you're having a productive week!

Please find attached invoice [INV-001] for the completed work on [Project Name], totaling $[Amount].

Payment Summary:

• Invoice Number: [INV-001]
• Amount Due: $[Amount]
• Due Date: [Date]

You can complete payment via direct bank transfer or [Payment Link] using the instructions detailed on the invoice.

Please let me know if you have any questions. Thank you for your business!

Best regards,
[Your Name]
[Your Company Name]

Template 2: Friendly Reminder Before Due Date (3 Days Ahead)

Subject: Friendly Reminder: Invoice [INV-001] due on [Date]

Hi [Client Name],

Just a quick note to remind you that invoice [INV-001] for $[Amount] is due in three days on [Due Date].

I have re-attached the PDF for your convenience. Please let me know if your accounts department requires any additional information to process this.

Warm regards,
[Your Name]

Template 3: Overdue Payment Notice (7 Days Past Due)

Subject: Follow-up: Invoice [INV-001] is 7 Days Overdue

Hi [Client Name],

I am writing to follow up on invoice [INV-001] (amounting to $[Amount]), which was due on [Due Date].

We have not yet received payment confirmation. Could you please check the status with your finance team and confirm when we can expect the transfer?

Attached is a copy of the invoice for your reference.

Thank you,
[Your Name]