What is the 4-Year Tax Refund Rule in Ireland?
Under Section 865 of the Taxes Consolidation Act 1997, all claims for repayment of Irish tax must be submitted within 4 years of the end of the tax year to which they relate. In 2026, taxpayers can claim reliefs for 2022, 2023, 2024, and 2025. After 31 December 2026, all unclaimed 2022 credits expire permanently.