The Irish Aviation Authority IAA is a commercial State-sponsored body. The vast majority of revenue is  generated from charging aircraft that use Irish- controlled airspace.

The IAA receives no Government  funding. Approximately 75% of all IAA revenue comes  from en route airspace traffic (over flying Ireland) or  from  the use of HF Communication services. The IAA has one of  the lowest en route user charge unit rates in Europe making Irish airspace economically attractive  to  airspace  users.