Belgium · Unpaid invoice
A notice of default for an unpaid invoice in Belgium
In Belgium, a letter that clearly demands payment puts the debtor in default. In Dutch this is the ingebrekestelling, in French the mise en demeure. Between businesses, the letter states the late-payment interest and the fixed compensation the law adds. To a consumer, it is the free first reminder Belgian law requires before anything more than the amount owed can be claimed. You answer the questions and get the letter with the dates worked out.
The questions, and the documents that come with the letters (checklist, timeline, next steps and memo), are in English. The letters can be written in Dutch, French, German or English.
Other languages: Nederlands, Français, Deutsch
The rules your letter follows
Taken from the official sources listed below. Interest rates change from time to time; these are the current ones.
- Final deadline in the letter
- 15 days
- You can choose up to 30 days.
- First reminder to a consumer
- Free
- It asks only for the amount owed and gives at least 14 days to pay, starting a few working days after posting.
- Late-payment interest, between businesses
- 10.5%
- Until 31 December 2026. Runs by law from the day after the due date. No notice is needed.
- Fixed compensation, between businesses
- €40
- For each invoice paid late, without a notice. Higher recovery costs can be claimed if you can prove them.
- Interest at the legal rate, other debts
- 4.5%
- Until 31 December 2026. From the notice of default. From a consumer, only once the reminder period has passed.
- Limitation period
- 10 years
- The general period. Some claims have shorter ones, such as a trader's claim for goods sold to a private person.
- Court
- Justice of the peace
- If your client is a consumer: claims up to €5,000, and above that the court of first instance. Between businesses, the enterprise court hears the claim whatever the amount. You do not need a lawyer.
- How to send it
- Registered post
- Aangetekende zending met ontvangstbewijs (envoi recommandé avec accusé de réception). Send it by email too.
What the letter does
A Belgian notice of default tells the debtor clearly and unambiguously that you demand payment. The Civil Code sets no form for it, but if your client is a consumer, the rules for the first reminder described below apply. The letter names each invoice with its number, date, amount and due date, says that the due date has passed, and gives one final date to pay.
Between businesses, late-payment interest and a fixed compensation of €40 for each late invoice are due by law from the day after the due date, without a notice. If no payment term was agreed, a business client has 30 days to pay, counted from the day after it received the invoice. In other cases, interest at the legal rate runs from the notice of default. From a consumer, it runs only once the reminder period described below has passed.
When your client is a consumer
Under Book XIX of the Code of Economic Law, a business's first letter to a private person must be a free first reminder. It asks only for the amount owed and costs the consumer nothing. It must give at least 14 days to pay, and that period starts a few working days after posting, not on the date of the letter. Our letter allows for this, so its date is later than you might expect. Post it on the day it is dated or the next day.
Interest, and a lump sum if your terms expressly provide for one, can be claimed only once that period has passed without payment. The letter gives notice of them, and the law caps the lump sum according to the amount owed. In the Complete pack, the final notice claims them. The reminder must show your name and enterprise number (ondernemingsnummer / numéro d'entreprise), so the form asks for it.
About the debt, you may contact only your client, not their employer, family or neighbours. If a business applies its late-payment clause without the free reminder or before its period ends, charges more than the law allows, or contacts anyone other than the consumer, the consumer is released from that clause by law.
If they still do not pay
Claims up to €5,000 go to the justice of the peace (vrederechter / juge de paix), and larger ones to the court of first instance. Disputes between businesses go to the enterprise court (ondernemingsrechtbank / tribunal de l'entreprise) whatever the amount. You do not need a lawyer in any of them. A bailiff (gerechtsdeurwaarder / huissier de justice) serves the summons. You do not pay the court registration fee when you file. The judge's final decision orders the party that owes it, normally the losing party, to pay it. The escalation memo in the Complete pack explains each of these steps, but does not choose one for you.
The general limitation period is 10 years. In Belgium your own demand letter does not interrupt it. A written acknowledgement by the debtor does, and so can a registered notice sent by a lawyer or bailiff in the statutory form.
Where the rules come from
art. 5.231 of the Civil CodeNotice of default (ingebrekestelling / mise en demeure)
checked 10 October 2026
art. 5.240 of the Civil CodeInterest at the legal rate from the notice of default
checked 10 October 2026
arts. 5 and 6 of the Act of 2 August 2002 on combating late payment in commercial transactionsLate-payment interest and fixed recovery compensation between businesses
checked 10 October 2026
arts. XIX.2 and XIX.4 of the Code of Economic LawConsumer debts: free first reminder, minimum period and the only amounts a business may add
checked 10 October 2026
What is in the envelope
Word and PDF files you can edit before you send anything.
- 01
Demand letter
The formal letter, in the language you choose, with your amount and payment details. The deadline, and any interest and costs, follow the local rules.
- 02
Evidence checklist
What to keep and what to enclose, checked against the files you uploaded.
- 03
Timeline
Your dispute date by date, including the dates still to come.
- 04
Next steps
How to send the letter so you can prove it arrived, and what to do with each kind of reply.
- 05
Final notice of defaultComplete
A shorter second letter with a last deadline, for when the first one passes.
- 06
Escalation memoComplete
Court, collection agencies and lawyers: what each route involves. It describes the options; it does not choose one for you.
How it works
Today
You answer the questions. It takes about ten minutes, and your answers are saved as you go.
Today
You check the summary and pay. A few minutes later your documents are ready, in Word and PDF.
When you are ready
You sign the letter and send it yourself, so it comes from you.
Questions
Can I add interest or costs to a reminder to a private customer?
Not to the first one. Belgian law makes it a free reminder that asks only for the amount owed. Interest, and a lump sum your terms expressly provide for, can be claimed once its period has passed. The letter gives notice of them.
Do I have to send a letter before going to court?
No rule says you must. Between businesses, late-payment interest and the €40 compensation are due without a notice. Otherwise, interest at the legal rate runs only from a notice of default. And a business must send a consumer the free first reminder before claiming anything more than the amount owed.
Does my letter stop the claim from expiring?
No. In Belgium a creditor's own letter does not interrupt the limitation period. A written acknowledgement by the debtor does, and so can a registered notice from a lawyer or bailiff in the statutory form.
Can I have the letter written in English?
Yes. Dutch is the default; you can choose French, German or English instead.
What does it cost?
€49 for the Standard pack and €79 for Complete, including VAT. You pay once.
P.S.
Your documents are written by an AI system and checked automatically against your answers and the local rules. No lawyer reviews them. They are document drafts and general information, not legal advice. Your answers are deleted 30 days after delivery, or sooner if you ask.
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