Past Due Invoice: What It Is and When to Use It

A reissued invoice or notice for an amount that has passed its due date.

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What Is a Past Due Invoice?

A past due invoice is one whose due date has passed without payment. In practice the term also covers the document you send to chase it: a reissued invoice marked overdue, or a notice that restates the original amount, the days elapsed, and any late charge that applies.

The most useful thing to understand about overdue invoices is that most are not refusals. They are administrative failures — the invoice never reached accounts payable, a purchase order reference was missing, an approver was on leave. A chase that asks a specific question resolves more of them than one that simply repeats the amount.

Escalation should be planned rather than improvised: a reminder before the due date, a notice shortly after, a firmer notice with any late charge, then a decision about formal recovery.

When to Use It

An invoice has passed its due date without payment or explanation.
You are restating an amount owed with the days overdue shown.
A late fee or interest charge provided for in your terms is being applied.
You are creating a documented trail before escalating recovery.

Who Uses It

Freelancers and small businesses chasing their own invoices
Accounts receivable teams running a collections process
Service businesses with credit terms
Anyone preparing a record before formal recovery action

Benefits of a Past Due Invoice

Restates the debt clearly, with the elapsed time visible.
Surfaces administrative blockers that silence would never reveal.
Creates a dated, documented trail of attempts to collect.
Applies agreed late charges in a consistent, defensible way.

Fields to Include on a Past Due Invoice

The fields below are the ones businesses commonly include. They are a practical starting point, not a statement of what any particular country requires.

A clear marker such as "Past Due" or "Overdue"
The original invoice number, issue date, and due date
The original amount and anything paid against it
Days overdue as at the date of the notice
Any late fee or interest applied, with the basis stated
The total now due
Payment details and a payment link or QR code
A named contact and what you are asking the recipient to do

Common Past Due Invoice Mistakes

Chasing without asking anything

A reminder that only repeats the amount gets ignored. Ask a specific question: has it been approved, is a PO missing, who should this go to?

Applying fees that were never agreed

Late charges need to have been in your terms before the invoice was issued.

Escalating too fast or too slow

An aggressive first chase damages the relationship; a first chase at ninety days rarely recovers anything.

Changing the invoice number

A chase should reference the original invoice, not create a new one — a second number makes the debt look like two.

Past Due Invoice Best Practices

1Send a courtesy reminder a few days before the due date, not only after.
2State days overdue and the original invoice reference on every notice.
3Include a payment link or QR code so paying takes one action.
4Follow a fixed escalation schedule so chasing does not depend on mood.
5Keep the tone factual — the aim is payment, not a position.

Past Due Invoice FAQs

When is an invoice past due?

The day after the due date stated on it. If no due date was stated, your agreed payment terms determine it — which is one reason to always put the due date on the invoice.

Can I charge a late fee on an overdue invoice?

Only if your terms provided for it before the invoice was issued. What you may charge, and any statutory entitlement to interest, varies by jurisdiction — check your local position.

Should I reissue the invoice or send a reminder?

Send a notice that references the original invoice number and restates the amount. Creating a new invoice number for the same debt makes reconciliation harder for both sides.

How often should I follow up?

A common pattern is a reminder just before the due date, a notice a few days after, a firmer one at two weeks, then a decision at thirty days. Consistency matters more than frequency.

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