An overdue invoice does not recover itself. Every day of inaction costs you in two ways: lost cash flow and diminishing psychological leverage over the debtor. Here is the exact sequence to follow, from the day after the due date to legal enforcement.
Step 1: Confirm the Invoice Is Actually Overdue
Before sending any reminder, verify three things:
Check your payment terms. If your invoice said "30 days" and the due date is tomorrow, you are not overdue yet. Confirm the exact due date based on the agreed terms — some contracts calculate from receipt of goods, not invoice date.
Check whether the invoice was actually received. Email delivery failures happen. Before assuming bad faith, confirm the invoice reached the client's accounts department. A quick call asking "Did you receive Invoice #001 dated [date]?" is not weakness — it removes the "we never got it" defence and creates a record.
Check whether you have been paid. Bank processing times vary. Check your account, including pending transactions, before sending a stern reminder to a client who paid two days ago.
Once confirmed overdue, move immediately to Step 2.
Step 2: Send a Reminder (Day 1 Overdue)
Send a professional, non-confrontational reminder on the day the invoice becomes overdue. Keep the tone helpful — you are assuming an oversight, not accusing anyone of bad faith.
A good subject line: Invoice #[001] — Payment Due Today
Your reminder should state the invoice number, amount, due date, and your bank details. Nothing more. Do not mention interest or consequences at this stage. The goal is to prompt payment from clients who genuinely forgot.
Set a calendar reminder for 7 days. If payment has not arrived by then, move to Step 3.
Step 3: Calculate Statutory Interest and Send a Formal Demand (7–14 Days Overdue)
By day 7 of non-payment, it is time to send a formal written demand. This is the step that resolves the majority of cases. A formal demand:
- States the overdue amount clearly
- Calculates and states the accrued statutory interest (under EU Directive 2011/7/EU, the rate is ECB + 8% = 11.15% per annum for H1 2026)
- Claims the €40 minimum recovery fee (or €70 for invoices over €1,000) under Art. 6 of the Directive
- Sets a firm deadline for payment (7 days is standard)
- States the consequences of non-payment (escalation to collections and/or legal proceedings)
The interest calculation matters. A demand that says "statutory interest applies" is easy to ignore. A demand that says "accrued interest to date: €47.32, recovery fee: €70.00, total now due: €5,117.32" is not. Use our Late Payment Calculator to get the exact figures.
For Germany: this document is your Mahnung. Write it in German for domestic clients and mark it "Formelle Mahnung / Letzte Mahnung" on the subject line. It triggers the legal consequences of Verzug (default) under §286 BGB.
For France: send this as a mise en demeure by registered letter (lettre recommandée avec accusé de réception) where possible. It places the debtor formally in demeure under Art. 1344 of the Civil Code.
Step 4: Consider the European Payment Order (Cross-Border Claims)
If your client is in a different EU country, the European Payment Order (EPO) under Regulation 1896/2006 is the most underused and undervalued tool available to freelancers and SMEs. Here is why it matters:
| Feature | EPO |
|---|---|
| Available for | Cross-border EU claims (any amount) |
| Court fee | ~€50–€200 |
| Time to order | 30 days from filing |
| Lawyer required | No |
| Enforceable in | All EU member states automatically |
| Risk if debtor contests | Converts to standard proceedings |
You file Form A (available from your national court or the EU e-Justice portal) with the competent court in your country. The court reviews the application — not the merits of the contract, just whether the claim is clearly stated — and issues the order. The debtor has 30 days to contest. If they do not, the order is enforceable across the EU.
The EPO is particularly powerful because many debtors assume that a foreign creditor will not pursue them through the courts. The EPO removes that assumption at minimal cost.
Step 5: Engage a Debt Collection Agency or Lawyer
If the EPO is not appropriate (domestic dispute, contested claim) or the formal demand has failed, professional debt collection is the next step.
| Route | Best For | Typical Cost |
|---|---|---|
| Pre-legal collection agency | Invoices €500–€10,000, clear-cut cases | 15–25% commission on recovery |
| Solicitor's letter | Disputed claims, ongoing relationships | €150–€500 fixed fee |
| Debt purchase | Writing off the debt quickly | 50–70 cents per €1 of face value |
A solicitor's letter on law firm letterhead resolves many disputes that a direct demand does not — the psychological weight of professional legal correspondence is disproportionate to its cost. Many solicitors offer a fixed-fee letter service for €150–€300.
Step 6: Small Claims Court by Country
For domestic claims where the client has received all reminders and engaged a collection agency without resolution, small claims court is the final step before full civil litigation.
| Country | Procedure | Claim Limit | Approximate Cost |
|---|---|---|---|
| Germany | Mahnverfahren (online) | No limit | €32–€105 (half standard fee) |
| France | Injonction de payer | €10,000 | €33–€150 |
| Italy | Procedimento per ingiunzione | No limit | €43–€120 |
| Spain | Proceso monitorio | No limit | Low (no lawyer for claims under €2,000) |
| Netherlands | Kantonrechter | €25,000 | €83–€486 |
| Ireland | District Court | €15,000 | €80–€200 |
| Poland | Electronic payment order (e-Sąd) | €10,000 | Very low |
For EU cross-border claims up to €5,000, the European Small Claims Procedure (Regulation 861/2007) operates as an alternative to national courts — a written procedure, no hearing required, judgment enforceable across the EU.
What NOT to Do
Certain actions feel satisfying but damage your legal position:
Do not send threatening or abusive messages. Any written communication can be used against you in court. Keep every message professional, factual, and focused on the invoice.
Do not stop work without written notice. Stopping delivery unilaterally on an ongoing contract is a breach unless you have a contractual right to suspend and have given proper written notice with a cure period.
Do not claim you will report the debt to credit bureaus unless you actually intend to and have the right to do so. Empty threats undermine your credibility and, in some jurisdictions, constitute unfair debt collection practices.
Do not negotiate away the principal without first considering the precedent. If you accept 70 cents on the dollar from this client, you have signalled that non-payment has a discount attached.
Do not wait. Every month of delay is a month of lost interest accrual, a month closer to the limitation period, and a month during which the debtor may become insolvent or move assets. Act within 14 days of the due date at the latest.
Statute of Limitations Quick Reference
| Country | Limitation Period | Interrupted By |
|---|---|---|
| Germany | 3 years (end of calendar year) | Mahnung, court filing |
| France | 5 years | Mise en demeure, court filing |
| Italy | 10 years (general commercial) | Written demand, court filing |
| Spain | 5 years (commercial) | Written demand, court filing |
| Netherlands | 5 years | Written demand, court filing |
| Ireland | 6 years | Court filing |
| Poland | 3 years (commercial) | Court filing |
The moment you send a formal written demand, take a note of the date and keep proof of delivery. That date is your interruption date — it matters if the claim is later contested near the limitation deadline.
Use our Late Payment Calculator to calculate the exact interest, flat recovery fee, and total amount outstanding for any overdue invoice. The figures you put in your formal demand at Step 3 are the foundation of every subsequent step — getting them right is worth 30 seconds.