Overdue Invoice Reminder with Payment Portal Instructions

If payment must go through a portal (not by direct bank transfer), this reminder clarifies the next step and eliminates confusion. Use this to resend overdue invoice details and guide the recipient to complete payment in your system.

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Starter

$39

One-time payment for a basic reminder pack.

Generate base pack

Pro

$89

Full multi-email sequence plus templates and variations.

Generate an overdue reminder pack

When to use / when to send

Checklist / what to include

Invoice #{{InvoiceNumber}}, amount {{Amount}}, due {{DueDate}}
Instructions for logging in or accessing the portal
Direct {{PayLink}} or explain where to find it
One firm ask: pay now or reply with questions
Support contact (optional if needed)

How to use

Copy/paste template

Hi {{Name}},

Invoice #{{InvoiceNumber}} for {{Amount}} was due on {{DueDate}}, and payment is now overdue. Please pay by logging into our portal at {{PayLink}}. 

If you have trouble accessing the portal or have questions, just reply to this email and we’ll assist.

Thanks,
{{YourName}}
{{Company}}

Follow-up plan + common mistakes

If they respond with an issue, provide help quickly to avoid delays
If they still don’t pay, escalate with direct call or alternate instruction
Don’t send the same message repeatedly—address the friction
Don’t forget to update links if your system changed
Don’t assume every client knows the portal process—be direct

FAQ

Access issues or confusion are the top causes. Always include a direct link and troubleshooting info.