Country guide

Belgium

Belgium mainly uses the National Register number for individuals recorded in the National Register, the BIS number for persons who have a Belgian link but do not have a National Register number, and the BCE/KBO enterprise number for entities.

BE BEL 3 TIN types Last reviewed 2026-04-19

TIN types

3 published formats. Open a type to see examples, structure details, and official sources.

Validate Belgium TIN

Belgian National Register Number — Individuals

Current Individuals

Registre national des personnes physiques (National Register of Natural Persons)

Primary Belgian personal TIN for people recorded in the National Register.

Details

Examples

85.07.15-001.25

Where to find it

On Belgian identity cards and in official tax, social-security, and identity records.

Common names

National Register number Numéro national Numéro de registre national

Structure

1-6 Birth date block Date-of-birth block in YYMMDD order; official instructions also allow incomplete-date encodings.

7-9 Serial Registration-order number for people sharing the same date block.

10-11 Control Control digits.

Official source

oecd.org ibz.rrn.fgov.be socialsecurity.be

Belgian BIS Number — Individuals

Current Individuals

Banque-Carrefour de la sécurité sociale (Crossroads Bank for Social Security)

Alternative Belgian personal TIN for people who have a Belgian link but do not have a National Register number.

Details

Examples

85.47.15-001.14

Where to find it

On Belgian tax or social-security documents and in Belgian digital identification flows for people without a National Register number.

Common names

BIS number Numéro BIS BIS-nummer

Structure

1-2 Year Year of birth in YY form when known.

3-4 Month code Birth-month code increased by 40 when sex is known at creation or by 20 when sex is unknown at creation.

5-6 Day code Birth-day code or an incomplete-date code.

7-9 Serial Creation-order serial.

10-11 Control Control digits.

Official source

ksz-bcss.fgov.be fin.belgium.be finances.belgium.be

Belgian Enterprise Number — Entities

Current Entities

Banque-Carrefour des Entreprises (Crossroads Bank for Enterprises)

Primary Belgian entity TIN for entities registered in the BCE/KBO.

Details

Examples

0403.019.261 1000.000.021

Where to find it

On BCE/KBO registration extracts, in the BCE public search, and commonly on invoices and other commercial documents.

Common names

Enterprise number Company number Numéro d'entreprise Ondernemingsnummer BCE number KBO number

Structure

1-8 Serial Core enterprise-number body.

9-10 Control Control digits.

Official source

oecd.org economie.fgov.be socialsecurity.be finances.belgium.be news.economie.fgov.be