More than 8 million euro has been spent on the Garda air units over the past 6 years.
In excess of a million euro a year is spent maintaining the two Garda helicopters.
The figures show an almost 8 and a half million euro spend on maintaining the garda helicopters between 2011 and October last year.
The figures, released under the Freedom of Information Act, show a 1.2 million euro spend in 10 months last year.
The helicopters may be used in a variety of operations – including policing of state events and monitoring gangland crime in 2016.
In 2015 they were also used to catch a criminal gang stealing ESB power lines.
The air units are based in Baldonnel on the outskirts of Dublin city and are deployed during incidents where there is a threat to life, or serious criminal and terrorist incidents.
Gardaí say they’re also used for evidence gathering and photographic tasks.