Not many employees realise that they can claim flat rate expenses as a tax relief. Flat rate expenses relate to expenses incurred in the performance of the duties of employment. The Revenue has agreed a set amount for each eligible employment.
The Revenue have issued a list of eligible employments and the flat rate that can be claimed here : www.revenue.ie/en/tax/it/leaflets/flat-rate-expenses.xls
They can be included with your tax credits for the year or a claim can be made on the end of year tax return