Invoice 30 days overdue? What to do now
At 30 days late the next step is a formal written claim for interest and the fixed compensation. The steps below link to a free guide for each.
Where you stand at 30 days late
A first reminder should already be out. If it is not, send letter 1 today. If it is, the next step is a written claim, not another phone call.
What to do this week
- Check your bank account and the invoice data (number, amount, due date, legal name).
- Send the formal notice: it states the interest and the fixed compensation you claim and sets a new date.
- Write the date you sent it down. A paper trail comes first.
- If the client says they cannot pay in full, offer a payment plan in writing.
- If the new date passes, send the final notice.
What you can add to the invoice
For business-to-business invoices in the EU and UK, the law adds interest (10,4% per year at the EU minimum now) and a fixed compensation (EUR 40 in the EU). See the EU rule by country, the UK rule and the formula. Private consumers are not covered by these rules.
Do not
- Do not wait for a 60 or 90 day mark. The interest runs from the due date, not from your first reminder.
- Do not threaten steps you will not take.
- Do not contact the client's staff or customers about the debt.
This guide is general information, not legal advice.
Rates and sources as stored on 11 October 2026. Business-to-business debts only. Templates and calculations, not legal advice.