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Validate Belgium VAT Numbers via API
When building B2B applications that serve Belgium (België / Belgique), validating your customers' BTW/TVA (Belasting over de Toegevoegde Waarde / Taxe sur la Valeur Ajoutée) is essential for EU VAT compliance and protecting your business from tax liability.
The TaxID API provides instant validation of Belgium VAT numbers through the EU VIES (VAT Information Exchange System). Every request returns the registration status, company name, and registered address — with sub-100ms response times for cached results.Belgium applies a standard VAT rate of 21% (BTW/TVA) and is fully supported by the VIES system.
QUICK START
curl -H "Authorization: Bearer YOUR_API_KEY" \ http://localhost:3000/api/v1/validate/BE/BE0123456789
Code examples
Choose your language. Every example validates a Belgium VAT number and returns the registration status with company details.
const res = await fetch('http://localhost:3000/api/v1/validate/BE/BE0123456789', {
headers: { 'Authorization': 'Bearer YOUR_API_KEY' }
});
const data = await res.json();
// { valid: true, status: "active", company_name: "...", country_code: "BE", cached: false }
console.log(data);When to validate Belgium VAT numbers
B2B cross-border sales
When selling goods or services to Belgium businesses in other EU member states, you must verify their BTW/TVA (Belasting over de Toegevoegde Waarde / Taxe sur la Valeur Ajoutée) to correctly apply zero-rate VAT under the reverse charge mechanism. Failing to validate before zero-rating a transaction makes your company liable for the full VAT amount if the customer turns out to be unregistered.
E-commerce and SaaS checkout
If your platform accepts Belgium business customers, validating the BTW/TVA (Belasting over de Toegevoegde Waarde / Taxe sur la Valeur Ajoutée) at checkout determines whether to apply 21% VAT (B2C) or zero-rate the sale (B2B reverse charge). This directly affects your invoicing, revenue recognition, and quarterly VAT return figures.
Supplier and partner onboarding
For ERP systems, procurement platforms, and DAC7-regulated marketplaces, validating aBelgium supplier's BTW/TVA (Belasting over de Toegevoegde Waarde / Taxe sur la Valeur Ajoutée) during onboarding prevents invalid numbers from entering your accounting system — which can cause rejected invoices and audit failures. Validate once at onboarding, then periodically re-validate to catch deregistrations.
About Belgium VAT format (BTW/TVA)
Belgian VAT numbers begin with BE0 (for companies registered before 2003) or BE1 (newer). All Belgian companies must register within 15 days of commencing taxable activity.
| Field | Value |
|---|---|
| Country code | BE |
| Local name | BTW/TVA (Belasting over de Toegevoegde Waarde / Taxe sur la Valeur Ajoutée) |
| Format | BE + 0 or 1 + 9 digits (10 digits total) |
| Regex pattern | ^BE[01][0-9]{9}$ |
| Example | BE0123456789 |
| VIES supported | Yes |
VAT rates in Belgium
Belgium applies a standard BTW/TVA rate of 21%. Reduced rates of 12% and 6% apply to essential goods and services.
| Rate type | Percentage | Currency |
|---|---|---|
| Standard rate | 21% | EUR |
| Reduced rate | 12% | EUR |
| Reduced rate | 6% | EUR |
Frequently asked questions
What is the Belgium VAT number format?
Belgium VAT numbers (BTW/TVA (Belasting over de Toegevoegde Waarde / Taxe sur la Valeur Ajoutée)) follow the format: BE + 0 or 1 + 9 digits (10 digits total). A valid example is BE0123456789. The TaxID API validates both the format locally and the registration status via VIES, ensuring you only accept properly registered EU businesses.
Is VAT validation mandatory for selling to Belgium businesses?
EU VAT law requires that suppliers verify a customer's VAT registration before applying zero-rate treatment to intra-community B2B supplies. If you sell goods or services to a Belgium business without VAT and their registration is invalid, your company may be liable for the full VAT amount plus interest and penalties. Validation is not just recommended — it is your legal due diligence obligation.
What is the standard VAT rate in Belgium?
The standard VAT rate in Belgium is 21% (BTW/TVA). Reduced rates of 12% and 6% apply to certain goods and services such as food, books, and medical supplies. The TaxID API's /rates endpoint returns all current rates for programmatic access.
How long does Belgium VAT validation take with TaxID?
For cached results (previously validated in the last 24 hours), the TaxID API responds in under 10ms. For uncached requests, the VIES SOAP call to the Belgium tax authority typically completes in 100–400ms. Active (valid) numbers are cached for 24 hours; invalid numbers are cached for 1 hour to balance performance with freshness.
Does the TaxID API support VIES for Belgium?
Yes. Belgium is fully supported by the EU VIES system and the TaxID API. VIES validates Belgium VAT numbers in real time against the Belgium national tax authority's registration database. Belgian VAT numbers begin with BE0 (for companies registered before 2003) or BE1 (newer). All Belgian companies must register within 15 days of commencing taxable activity.
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