An invoice is generally overdue when the stated due date has passed and some amount remains unpaid. First check the terms, delivery, balance and payment records.
An overdue invoice is an invoice whose agreed due date has passed while an amount remains outstanding. Before treating it as overdue, check the actual terms, any partial payments and whether the customer received the correct document.
Practical steps to take
- Check the invoice details. Confirm the invoice number, customer, amount, currency, due date and payment instructions.
- Re-read the agreed payment terms. Confirm what starts the payment period and whether the stated due date is correct.
- Review your payment records. Check bank, card or payment-platform records and match any partial payment to the invoice.
- Confirm the invoice was received. Verify the billing contact and ask whether the customer needs another copy or clarification.
- Send a courteous reminder. Refer to the invoice number, original due date, balance and a clear next action.
- Discuss a payment issue. If the customer raises a dispute or cash-flow concern, document the conversation and any agreed arrangement.
- Consider late fees only after review. Use them only where supported by the agreement and applicable requirements. This guide does not determine whether a fee is permitted.
- Keep a record. Save the invoice, reminders, replies, receipts and any updated payment plan with the same reference.
Friendly reminder example
Subject: Follow-up: Invoice [number] due [date]
Hello [customer name],
I’m checking in on invoice [number] for [brief description], which showed a due date of [date]. Our records show [balance] outstanding as of [date]. Could you confirm it reached you and let me know when payment is expected? If you have already paid, please disregard this note and share the payment reference so I can update the record.
Thank you,
[your name]
Late-fee arithmetic is not legal advice
A calculator can estimate a fee from principal, dates, rate, grace period and caps you enter. It cannot verify the contract, local law or whether a fee is appropriate in your case. See the late-fee calculator for arithmetic only.
If the invoice date or terms need checking, review the due-date guide and payment terms.
Frequently asked questions
Should I add a late fee as soon as an invoice is overdue?
Not automatically. Check the agreed terms and applicable requirements first. The calculator estimates arithmetic only and does not establish a right to charge a fee.
What if a customer says they already paid?
Check your payment records and ask for a date, method or reference if needed. Match the payment to the invoice before updating its status.
General information only—not legal, tax or accounting advice. Requirements can vary by jurisdiction, transaction and agreement. Confirm what applies to your situation.