The current rates for Light Dues on commercial vessels as of 1st April 2010 are:
UK and Northern Ireland 41 pence per tonne (sterling)
Republic of Ireland 60 cent per tonne (euro)
The rate is applied to the net registered tonnage (NRT) of the vessel.There is a minimum and maximum payment. A tonnage cap of 40,000 tonnes applies.
The Minister for Transport reviews the rate for Ireland annually under an Order of Section 2 of the Merchant Shipping (Light Dues) Act, 1983. See link below.
Regular traffic into ports in Ireland and the UK are obliged to pay for a maximum of 9 voyages a year.
All Light Dues collected in the UK and Ireland are "pooled" in a central fund called the General Lighthouse Fund (GLF). The Secretary of State in the Department for Transport in London administers this fund. Operating funds are released to Trinity House, Northern Lighthouse Board and Commissioners of Irish Lights from the GLF. Under an agreement reached between the Irish and UK Authorities in 1985, Light Dues collected at Irish Ports are supplemented by an annual Irish Government Exchequer contribution to the General Lighthouse Fund.