As published by Revenue today :

Reimbursement of Subsistence Expenses to Employees (including Directors)

While the reimbursement to an office holder or employee of expenses of travel and subsistence is a matter for the relevant body or employer, the tax treatment of such reimbursements is a separate matter. Guidance relating to the tax treatment of reimbursements is published on the Revenue website.

Following an agreed recommendation made by the General Council under the scheme of conciliation and arbitration for the Civil Service (General Council Report 1531 refers), changes will be made to the Civil Service distance requirements and rates with effect from 1 July 2015. These changes are reflected in Revenue Leaflet IT 54 – Employees’ Subsistence Expenses.

The distance requirements provide that:

1. an overnight allowance which covers a period of up to 24 hours from the time of departure, as well as any further period not exceeding 5 hours, will only be payable free of tax in respect of an absence which is necessarily spent overnight at least 100km away from the employee’s home and normal place of work and
2. a day allowance, which applies to a continuous absence of 5 hours or more, will only be payable free of tax where the absence is not at a place within 8 km (as opposed to 5 km) of the employee’s home or normal place of work.

Refer to Part 05-02-04 (PDF, 69 KB), which is available on the revenue website under About Us / Freedom of Information / Tax and Duty Manual/Income Tax Capital Gains Tax Corporation Tax / Part 38.