What is a BTW number?
The Dutch word for VAT, and why it should be on the invoice you get.
BTW (belasting over de toegevoegde waarde) is simply the Dutch name for VAT — value added tax. A BTW number is a business's VAT registration, issued by the Dutch tax authority (Belastingdienst) once it's registered with the KvK.
It follows a fixed format: NL + 9 digits + the letter B + 2 check digits. Klussen Fixer's own, for reference, is NL002507239B32.
Why it should appear on your quote
A proper invoice from a registered Dutch business states its BTW number and whether the quoted price is incl. BTW (including VAT, the total you actually pay) or excl. BTW (VAT added on top). A quote with neither a BTW number nor that distinction is harder to query later if a dispute over the final price comes up — and for larger jobs, you'll want that invoice anyway if you ever need to claim on home insurance.
Not every one-person business charges BTW on every invoice — some small businesses qualify for a simplified scheme — but a real, active business will always be able to tell you clearly which applies to your quote.
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