Country guide

Ireland

Ireland uses the Personal Public Service Number (PPSN) for individuals, Revenue tax reference numbers for non-natural persons registered for tax, and CHY numbers for bodies with Revenue charitable tax exemption.

IE IRL 3 TIN types Last reviewed 2026-05-14

TIN types

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

Validate Ireland TIN

Irish Personal Public Service Number (PPSN)

Current Individuals

Department of Social Protection (DSP)

Personal identifier allocated by the Department of Social Protection and used by Revenue to identify individual taxpayers.

Details

Examples

1234567T 1497955KA

Where to find it

On Public Services Cards, social services cards, medical cards, GP visit cards, European Health Insurance Cards, Drugs Payment Scheme Cards, letters from the Department of Social Protection or Revenue, payslips, tax assessments, and PAYE notices.

Common names

PPSN PPS number Personal Public Service Number

Structure

1-7 Serial Seven numeric characters, including any leading zeros.

8 Check character Control letter derived from the numeric part and, where present, the final letter.

9 Suffix Optional final letter used for expanded and legacy PPSN ranges.

Official source

gov.ie services.mywelfare.ie revenue.ie oecd.org

Irish Tax Reference Number (TRN) for Entities

Current Entities

Office of the Revenue Commissioners (Revenue)

Revenue tax identifier used for non-natural persons such as companies, partnerships, trusts, and unincorporated bodies after tax registration.

Details

Examples

1234567T 1497955KA

Where to find it

On Revenue tax registration correspondence, notices of assessment, tax returns, invoices, and tax-clearance records.

Common names

TRN Tax Registration Number Tax Reference Number

Structure

1-7 Serial Seven numeric characters, including any leading zeros.

8 Check character Control letter derived from the numeric part and, where present, the final letter.

9 Suffix Optional final letter; H may appear on company tax reference numbers.

Official source

revenue.ie oecd.org

Irish Charity Exemption Number (CHY)

Current Entities

Office of the Revenue Commissioners (Revenue)

Revenue reference number issued to eligible bodies that have been granted charitable tax exemption.

Details

Examples

CHY 1234

Where to find it

On Revenue charitable tax exemption correspondence and in Revenue's published list of bodies with charitable tax exemption.

Common names

CHY CHY number Charity exemption number

Structure

1-3 Prefix Fixed CHY prefix.

5-9 Reference digits One to five digits identifying the exempt body.

Official source

revenue.ie oecd.org