John Perry, Partner, Ogier: Revenue Commissioner’s latest 2025 Annual Report details another robust year in the administration and collection of taxes, underpinning the funding of public services and Ireland’s economic stability. A trend that has continued in 2025 evidenced by the Tax Appeals Commissioners concluding 1,185 determinations since 2016 of which 204 cases were concluded in 2024 and 165 in 2025.

Of the 165 Tax Appeal Commissioners’ determinations in 2025 the majority relate to Income Tax. Across the Tax Appeals Commission determinations published in the first quarter of 2026, the Commissioners consistently reaffirmed that the burden of proof rests squarely on the taxpayer and must be discharged through clear, contemporaneous and coherent documentary evidence, with cases involving the characterisation of transfers as loans or gifts demonstrating that unsupported assertions, inconsistent explanations or retrospective documentation will not suffice and will result in amounts being taxed in accordance with Revenue’s assessments.

In a number of determinations concerning capital taxes and unexplained cash movements, the Commission emphasised that while it will not lightly infer receipt of funds or taxable events in the absence of direct evidence, it equally requires taxpayers to substantiate their position with credible and consistent records, such that the absence of documentation, conflicting figures or an inability to trace financial flows will generally lead to adverse findings.

The determinations also illustrate a continued strict and formal approach to statutory interpretation, particularly in the context of PAYE and income tax cases, where the Commissioners applied the relevant provisions of the Taxes Consolidation Act 1997 in a literal and structured manner and showed limited willingness to recharacterise payments or depart from payroll treatment where the legislation clearly prescribed the tax consequence.

In the area of tax reliefs and incentive regimes, including R&D tax credits and various statutory schemes, the Commission adopted a rigorous compliance-based approach, confirming that entitlement is contingent on satisfying both substantive conditions and procedural requirements, with time limits and filing obligations enforced strictly and without scope for equitable relief where these are not met.

A number of determinations in respect of VAT disputes and other technical matters further highlight the fact-specific nature of the Commission’s analysis, with outcomes turning on the precise factual matrix and the ability of the taxpayer to demonstrate the requisite connection between activities and tax treatment, thereby reinforcing the importance of detailed contemporaneous documentation and robust technical positioning at the time transactions are undertaken.

Finally, the body of decisions from the period underscores the Commission’s broader approach as a tribunal that prioritises evidential clarity, statutory certainty and procedural compliance over equitable considerations, with determinations reflecting a predictable but exacting framework in which well-documented and technically supported positions are essential to successfully challenging Revenue assessments.

This article appeared in the May 2026 edition of the Irish Tax Monitor.