What is a TIN number and how to find it?
What is a TIN number?
A Tax Identification Number (TIN) is a unique number used by tax authorities to identify individuals for tax purposes. As a regulated financial institution, Blockrise is required to collect your TIN to comply with international tax reporting regulations. The name and format of your TIN varies depending on your country of residence. Below you'll find information for the most common countries where Blockrise clients are located.
TIN by Country
Netherlands: Burgerservicenummer (BSN)
What it is: A 9-digit number assigned to everyone registered in the Netherlands.
Format: 123456789
Where to find it: On your passport, ID card, driver's license, tax correspondence from the Belastingdienst, or in your DigiD account.
Belgium: Numéro de registre national / Rijksregisternummer
What it is: An 11-digit identification number assigned to all Belgian residents.
Format: YY.MM.DD-XXX.XX (starts with your date of birth)
Where to find it: On the back of your Belgian identity card (eID), on tax documents from SPF Finances/FOD Financiën, or on your salary slips.
Luxembourg: Numéro d'identification
What it is: A 13-digit number assigned to all Luxembourg residents for tax and social security purposes.
Format: YYYYMMDDXXXXX (starts with date of birth)
Where to find it: On your social security card, tax documents from the Administration des contributions directes, or on your salary slips.
Germany: Steueridentifikationsnummer
What it is: An 11-digit tax ID number assigned to all German residents for life.
Format: 12 345 678 901
Where to find it: On your tax assessment (Einkommensteuerbescheid), correspondence from the Bundeszentralamt für Steuern, or on your payslips. You can also request it at www.bzst.de.
Note: Don't confuse this with the Steuernummer. The 11 digit Steuer ID is what you need.
France: Numéro fiscal de référence
What it is: A 13-digit tax reference number used to identify taxpayers in France.
Format: 0123456789012
Where to find it: On your tax notice (avis d'imposition), in your personal tax space on impots.gouv.fr, or on correspondence from the Direction générale des Finances publiques.
United Kingdom: National Insurance Number
What it is: A unique identifier used in the UK for tax and national insurance purposes.
Format: AB123456C (2 letters, 6 digits, 1 letter)
Where to find it: On your payslips (P60 or P45), letters from HMRC, or in your personal tax account on gov.uk.
Other Countries
If your country is not listed above, you can find TIN information for all countries on the OECD's official TIN database.
FAQ
Why does Blockrise need my TIN?
Blockrise is legally required to collect TIN information for international tax compliance. This helps tax authorities ensure correct reporting of income from crypto assets.
What if I don't have a TIN?
Most tax residents will have been automatically assigned a TIN. If you cannot locate yours, contact the tax authority in your country of residence for assistance.