TIN Check

TIN Check United Kingdom

Check here if the TIN number is valid for United Kingdom

United Kingdom United Kingdom
Official country information

TIN validation guidance for United Kingdom

Access country-specific reference information, recognised formats and validation resources designed for compliance teams, finance departments and enterprise operations.

TIN Check United Kingdom (UK)

In United Kingdom the TIN there are 3 kinds of TIN’s (NINO, UTR and TRN) for Individuals and 1 (UTR) for Entities.
To validate a tax identification number (TIN) from UK, the TIN must be placed on top of it, which must obey the following format:


For Individuals (TIN / NINO / UTR / TRN)

The NINO is the Nacional Insurance Number and is equivalent to TIN number. NINO have the following format:
• LLNNNNNNL – Total of 9 digits

N identifies that it must be a numeric digit.
L identifies that it must be a letter.


The UTR is the Unique Taxpayer Reference and is issued by the HM Revenue & Customs (HMRC) and have the following format:
• NNNNNNNNNN – Total of 10 digits

N identifies that it must be a numeric digit.

The TRN is a Temporary Reference Number generated internally when a full NINO cannot be traced or is not held. NINO have the following format:
• NNLNNNNN – Total of 8 digits

N identifies that it must be a numeric digit.
L identifies that it must be a letter.

For Entities (TIN / UTR)

The UTR assumes the same format has for individuals
• NNNNNNNNNN – Total of 10 digits

N identifies that it must be a numeric digit.

After validation, additional information on the TIN introduced will be made available

Reference formats

Official example structures

Use the following examples as guidance for commonly recognised tax identification formats.

Individual
Entity

Trusted by professional and regulated sectors

The TIN Check ecosystem supports workflows where verification quality, auditability and speed are essential.

banks

Banks

Used to support identity, compliance and tax data validation in financial onboarding processes.
trading applications

Trading Applications

Supports tax identifier validation in digital investment, brokerage and trading environments.
billing softwares

Billing Software

Improves customer registration, invoicing accuracy and fiscal data consistency.
e-commerce

E-Commerce

Accelerates order capture and reduces manual tax identification handling in online sales operations.
trading companies

Trading Companies

Useful for cross-border supplier, client and partner tax identity verification workflows.
tax authorities

Tax Authorities

Supports structured reference and validation processes in public-sector and fiscal administration contexts.
tincheck dashboard
Operational management

Manage validation activity with a professional dashboard experience

The TIN Check dashboard supports organised usage, clearer operational workflows and a more suitable environment for business teams handling customer, supplier or compliance data.

For organisations requiring recurring validations, account-based access provides a more controlled and scalable experience.

Learn more about secure access →

Reference articles and country guidance

Explore selected country-specific content to better understand regional tax identification practices.

United States tax id number

Tax ID Number in the United States

General guidance regarding the role and use of tax identification records in the United States.

United Kingdom VAT number

VAT Number in the United Kingdom

Introductory information regarding VAT registration references and UK business identification use cases.

Security and reliability

Designed for security-conscious business workflows

TIN Check applies layered controls to support a safer validation environment for business users. The platform is structured to operate with controlled access paths and professional handling expectations.

More information