What a quote needs before it gets signed
Belgian law sets no fixed format for a quote, except in a handful of regulated trades. That is exactly why it deserves care : the quote is what counts if the client finds the invoice steep three months later.
A good quote spells out what is included, what is not, and how long the price holds. Thirty days of validity is the usual habit among freelancers here, and it protects you when suppliers raise their prices between the offer and the job.
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Your full details and your company number
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A line by line description of the work, with quantities
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The price excluding VAT, the rate applied and the total due
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How long the offer stays valid
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The deposit you ask for and when it falls due
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Your general terms, or a link to them
Get the quote accepted in writing, even by plain email. A dated acceptance link beats an agreement given over the phone between two jobs.
From the client saying yes to the invoice
This is the moment where money quietly disappears. A forgotten line, extra work agreed verbally that ends up nowhere, a discount applied twice : a manual invoice lets all of it through.
When quotes and invoices live in the same tool, the handover becomes mechanical. Lines carry over, numbering follows its series, any deposit already collected is deducted from the balance, and the invoice keeps a link back to its quote. If the client argues, you pull up both documents in ten seconds.
On longer projects, partial invoicing changes your cash position for the better : you invoice what is finished, the rest of the quote waits its turn, and you can always see what has not been billed yet.
The details that make an invoice valid
A Belgian invoice is not a quote with a different title. The tax authorities expect specific details, and leaving one out can cost your client the VAT deduction, which always earns you an awkward phone call.
The table below sets out what belongs where. Decent software takes that worry off your hands, simply by refusing to issue an incomplete document.
What belongs on the quote and on the invoice
| Item |
On the quote |
On the invoice |
| Issue date |
Recommended |
Required |
| Unique sequential number |
Useful for tracking |
Required |
| Company number and VAT number |
Recommended |
Required for both parties |
| Description of the work |
The heart of the document |
Required |
| Taxable base, rate and VAT amount |
Recommended |
Required |
| Exemption or reverse charge wording |
Where relevant |
Required when it applies |
| Payment due date |
Useful |
Required in practice |
| Validity period of the offer |
Required in practice |
Not applicable |
Peppol, since 2026
Since 1 January 2026, invoices between VAT registered Belgian businesses travel in structured form over the Peppol network. A PDF by email is still fine for a private customer, but no longer enough between professionals.
Quotes fall outside that rule : send them however you like, as a PDF or through a link. It is the invoice that has to leave in structured form. With Novadesko, that happens from the invoice screen, through our own access point, with no extra subscription to an operator.
If you are still hunting for your Peppol identifier or a client's, the Peppol page lets you check it before you send anything.
Deposits, terms and reminders
Asking for a deposit is not rude, it is standard practice in construction and events. A third up front, the balance on delivery, and your cash flow no longer depends on how the client feels that week.
Between businesses, payment terms are capped and late payment interest runs by law once the due date passes. With a private customer, the first formal reminder is free and gives them fourteen calendar days before any charge applies.
What actually brings the money in is consistency. A friendly reminder after seven days, a firmer one two weeks later, and most late payments sort themselves out without the word collection ever coming up.
Getting started this weekend
An hour is plenty : your logo, your details, your VAT number, the numbering series picking up where your old file stopped, and your general terms set once and for all.
The trial runs for fourteen days and asks for no card. Build a real quote for a real client, have it accepted, convert it, send the invoice. If the journey suits you, carry on. If not, you have paid nothing.
Frequently asked questions
Is a quote binding for a freelancer in Belgium ?
Yes, as soon as it is accepted. A signed or written acceptance turns the quote into a contract : the price, the scope and the deadlines bind both sides. That is why a validity period and clear general terms are worth more than a figure quoted over the phone.
Can a quote become an invoice without retyping everything ?
Yes. In Novadesko, an accepted quote converts into an invoice in one click : lines, quantities, discounts and VAT carry over, the invoice takes its number in the current series and keeps the link to its quote. Any deposit already received is deducted from the balance.
Does the quote have to go through Peppol as well ?
No. The Belgian obligation from 2026 covers invoices between VAT registered businesses. A quote stays a free form commercial document that you send as a PDF or through an acceptance link.
How much does quote and invoice software cost for a freelancer ?
With Novadesko, 19 € excluding VAT per month, covering invoicing, quotes, Peppol sending, CRM and your accountant's access. The fourteen day trial asks for no bank card.
Can my accountant pull my documents ?
Yes, they get their own free access and find quotes, invoices and receipts in the same place. No more sending a folder of PDFs every quarter.
Read next
Page updated in August 2026. Belgian invoicing rules keep moving, especially around Peppol. For your own situation, your accountant remains the right person to ask.
