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Validate Bulgaria VAT Numbers via API
When building B2B applications that serve Bulgaria (България), validating your customers' ДДС (Данък върху добавената стойност) is essential for EU VAT compliance and protecting your business from tax liability.
The TaxID API provides instant validation of Bulgaria 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.Bulgaria applies a standard VAT rate of 20% (ДДС) and is fully supported by the VIES system.
QUICK START
curl -H "Authorization: Bearer YOUR_API_KEY" \ http://localhost:3000/api/v1/validate/BG/BG123456789
Code examples
Choose your language. Every example validates a Bulgaria VAT number and returns the registration status with company details.
const res = await fetch('http://localhost:3000/api/v1/validate/BG/BG123456789', {
headers: { 'Authorization': 'Bearer YOUR_API_KEY' }
});
const data = await res.json();
// { valid: true, status: "active", company_name: "...", country_code: "BG", cached: false }
console.log(data);When to validate Bulgaria VAT numbers
B2B cross-border sales
When selling goods or services to Bulgaria businesses in other EU member states, you must verify their ДДС (Данък върху добавената стойност) 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 Bulgaria business customers, validating the ДДС (Данък върху добавената стойност) at checkout determines whether to apply 20% 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 aBulgaria supplier's ДДС (Данък върху добавената стойност) 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 Bulgaria VAT format (ДДС)
Bulgaria uses the Latin prefix BG even though its local name uses Cyrillic script. Companies with 9-digit EIK (commercial register number) and individuals with 10-digit EGN both receive VAT numbers in this format.
| Field | Value |
|---|---|
| Country code | BG |
| Local name | ДДС (Данък върху добавената стойност) |
| Format | BG + 9 or 10 digits |
| Regex pattern | ^BG[0-9]{9,10}$ |
| Example | BG123456789 |
| VIES supported | Yes |
VAT rates in Bulgaria
Bulgaria applies a standard ДДС rate of 20%. Reduced rates of 9% apply to essential goods and services.
| Rate type | Percentage | Currency |
|---|---|---|
| Standard rate | 20% | BGN |
| Reduced rate | 9% | BGN |
Frequently asked questions
What is the Bulgaria VAT number format?
Bulgaria VAT numbers (ДДС (Данък върху добавената стойност)) follow the format: BG + 9 or 10 digits. A valid example is BG123456789. 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 Bulgaria 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 Bulgaria 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 Bulgaria?
The standard VAT rate in Bulgaria is 20% (ДДС). Reduced rates of 9% 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 Bulgaria 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 Bulgaria 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 Bulgaria?
Yes. Bulgaria is fully supported by the EU VIES system and the TaxID API. VIES validates Bulgaria VAT numbers in real time against the Bulgaria national tax authority's registration database. Bulgaria uses the Latin prefix BG even though its local name uses Cyrillic script. Companies with 9-digit EIK (commercial register number) and individuals with 10-digit EGN both receive VAT numbers in this format.
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