Overdue Invoice Reminder With Payment Portal Instructions

If clients need to use an online portal for payment, remove friction. This template provides clear overdue notice plus step-by-step portal payment instructions.

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When to use / when to send

Checklist / what to include

Invoice #{{InvoiceNumber}} and {{Amount}}
Original due date {{DueDate}}
Direct payment link {{PayLink}} (if possible)
Short, stepwise portal instructions
Reply-by date {{ReplyByDate}} for tracking

How to use

Copy/paste template

Hi {{Name}},

Just a reminder, invoice #{{InvoiceNumber}} (amount {{Amount}}, due {{DueDate}}) is now overdue. Payment can be made through our online portal.

Instructions:
1. Log in to your account.
2. Go to ‘Invoices’ and select #{{InvoiceNumber}}.
3. Click ‘Pay Now’ or use this link: {{PayLink}}.

Please reply by {{ReplyByDate}} to confirm, or let me know if you need assistance.

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

Templates provided for reference—this is not legal advice.

Follow-up plan + common mistakes

Confirm your AP contact has access to the portal.
If they request help, offer a brief stepwise guide or direct contact.
If payment is made externally, ask for remittance advice.
Don’t send complex multi-step guides—clarity is key.
Don’t assume notifications are read—always send a direct reminder.

FAQ

Provide direct support or escalate to your client contact to resolve any access issues.