What to do when an invoice is overdue
When an invoice passes its due date, first confirm that the invoice is correct, unpaid and with the right customer contact. Then follow up with the invoice number, amount and due date, ask whether there is a dispute or approval problem, and record the response before deciding whether a firmer reminder or another step is justified.
Reviewed: 11 September 2026
Five checks before escalating an unpaid invoice
A late payment is not always a refusal to pay. Remove simple blockers first.
| Step | Check | Useful next action |
|---|---|---|
| 1 | Invoice number, amount, customer details and due date are correct | Correct genuine errors before chasing payment |
| 2 | No payment, credit note or partial payment has already changed the balance | Confirm the actual amount outstanding |
| 3 | The invoice reached the right billing contact | Resend it if necessary |
| 4 | The customer has no unresolved dispute or approval blocker | Ask for the specific issue and owner |
| 5 | Your proposed next step matches the agreement and applicable rules | Use a measured follow-up or escalation |
1. Verify that the invoice is really overdue
Check the invoice date, agreed payment term and exact due date. If the invoice says Net 30 but does not show the calculated date, confirm it before contacting the customer. Also check for bank transfers, payment-provider notifications, partial payments, credits or an internal note showing that payment is already being reconciled.
If the original term is unclear, review the invoice payment terms guide and use the due-date calculator.
2. Send a factual first follow-up
Reference the invoice number, outstanding amount and due date. Ask whether payment has already been sent and whether anything is preventing approval. Reattach or link the invoice when that makes it easier for the customer to act.
For wording examples, use the payment reminder templates or prepare a message with the payment reminder generator.
3. Separate payment delay from an invoice dispute
If the customer challenges the work, quantity, tax, purchase-order reference or billing entity, repeating the same reminder may not solve the problem. Identify the disputed item and decide whether the invoice stands, needs clarification, or genuinely needs a correction or credit note.
Keep the undisputed facts separate from the disputed point so both sides know what is still being resolved.
4. Use a consistent follow-up sequence
Set a date for the next contact rather than sending reminders at random. Record what was sent, who responded, any promised payment date and any dispute raised. Use the reminder wording for the right stage to keep the sequence consistent.
5. Check the basis before adding late-payment interest or fees
Do not assume a rate or fee merely because an invoice is overdue. Confirm what the contract and applicable law allow, when interest starts, what principal it applies to, and whether any notice is required. Once you know the correct basis, the late-payment interest calculator can do the arithmetic.
Collection, interest and legal steps vary by transaction and country
Business-to-business, consumer and public-sector transactions can have different rules. Contracts can also set dispute procedures, payment windows and notice requirements. Check the rules that apply before making a legal demand or starting collection action.
Plan the follow-up before sending another reminder.
Keep the invoice facts, customer response and next date together.