TIN Check

TIN Check Ireland

Check here if the TIN number is valid for Ireland

Ireland Ireland
Official country information

TIN validation guidance for Ireland

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

TIN Check Ireland (IE)

In Ireland, the Taxpayer Identification Number TIN for individuals is designated by Personal Public Service Number (PPS Nº) and is issued by the Department of Social Protection. For general entities the TIN is designated by Tax Reference Number (TRN) but in case of entities who are qualified for a charitable tax exemption the TIN is designated by CHY Number. The TRN an CHY Number are both issued by the Revenue Commissioners.

To validate a tax identification number from Ireland, the TIN / PPS / TRN / CHY number must be placed on top of it, which must obey the following format:


For Individuals

The TIN / PPS may assume the following 2 formats:
• NNNNNNNL (Total of 8 digits)
Or
• NNNNNNNLL (Total of 9 digits)

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


For General Entities

The TIN / TRN may assume the following 2 formats:
• NNNNNNNL (Total of 8 digits)
Or
• NNNNNNNLL (Total of 9 digits)

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

For Entities qualified for a Charitable Tax Exemption

The TIN / CHY assume the following format:
• from CHYN to CHYNNNNL (4 to 8 digits in Total)

CHY identifies that it a fixed designation.
N identifies that it must be a numeric digit.

After validation, additional information on the TIN / PPS / TRN / CHY introduced will be made available

Reference formats

Official example structures

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

Individual
Entity

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E-Commerce

Accelerates order capture and reduces manual tax identification handling in online sales operations.
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Supports structured reference and validation processes in public-sector and fiscal administration contexts.
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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.

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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.

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