Overview
| Number | Identifies you to | Appears on |
|---|---|---|
| KVK-nummer | The trade register and the market | Invoices, website, contracts |
| RSIN | Government systems (the base number) | The KVK extract |
| Btw-id | Customers and VIES | Invoices, webshop |
| Omzetbelastingnummer | The tax authority’s VAT administration | Tax correspondence and filings |
| Loonheffingennummer | Payroll administration | Wage-tax filings, payslips |
| EORI | Customs, EU-wide | Import and export declarations |
How the numbers are related
The RSIN is the base number. The omzetbelastingnummer and the EORI number are made from the RSIN, with extra letters and digits before and after it. The btw-id is a separate public number, made to protect your privacy. For the difference between the btw-id and the EORI number in trade, see VAT number vs EORI.
Check any EU VAT number in VIES: you see at once if the number is valid, with the company name where the country shares it.
Which number where
You put the KVK number and the btw-id on your invoices. The Belastingdienst quotes the omzetbelasting- or loonheffingennummer in its letters. For customs, you use the EORI number. If you quote the right number to the right office, you get a faster answer.
Each of the four numbers belongs to a different office, and each has its own filing dates. We keep all four in order for foreign-owned companies. See corporate secretarial services in the Netherlands.
Related articles
See also An EU Subsidiary for Your UK Company and From UK Ltd to Dutch BV.