Tax year

The calendar year, 1 January to 31 December, used for most Irish personal tax calculations.

Also searched as: year of assessment.

Four-year rule

Seed definition reviewed 2026-10-28. Editorial verification by a tax-qualified reviewer is required before indexing.

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Reference tax year 2026. Content is reviewed annually after each Budget and Finance Act.

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Glossary
Tax year

Glossary

Tax year

The calendar year, 1 January to 31 December, used for most Irish personal tax calculations.

Also searched as: year of assessment.

Four-year rule

Seed definition reviewed 2026-10-28. Editorial verification by a tax-qualified reviewer is required before indexing.

Tax year

Related

Tax year

Related