Taxes Consolidation Act, 1997 (Number 39 of 1997)
57 Extension of charge to tax under Case III of Schedule D in certain circumstances.
(1) This section shall apply to any sum received or benefit derived by an employee in respect of which there would be a charge to tax by virtue of Chapter 3 of Part 5 if the office or employment held by the employee were one the profits or gains from which were chargeable to tax under Schedule E.
(2) Where a person holds an office or employment and—
(b) the person receives a sum in respect of expenses or derives a benefit, being a sum or benefit to which this section applies,
the profits or gains from that office or employment assessable to tax shall include the specified amount and shall be charged to tax accordingly.
(3) The specified amount referred to in subsection (2) shall be the amount which by virtue of Chapter 3 of Part 5 would be chargeable to tax in respect of the sum or benefit to which this section applies if the profits or gains from the office or employment referred to in that subsection were chargeable to tax under Schedule E.