The Department of Infrastructure says releasing the cost of a ticketing system for public transport could breach its contract with the supplier.
A Freedom of Information request asked how much the system had cost since it was set up three years ago.
The DOI says £400,000 was put aside for ticket machines and smart cards project in 2013.
But it says providing more details would damage the commercial interests of Ticketer, the company which provided the system.
One weekend sailing cancelled, others at risk because of weather
The Steam Packet says it's cancelled its Saturday afternoon sailing because of bad weather.
Politician questions risk of Easter meningitis outbreak
Could the Island face a meningitis outbreak over Easter?
Firefighters tackle flat fire down South
The fire and rescue service dealt with a flat fire in Castletown earlier this afternoon
Weather warning for storm Dave this weekend
Ronaldsway Met office has issued a yellow weather warning for severe gales as storm Dave will hit the Island.
Roads to close for music festival this weekend
Roads in Ramsey will be closed for a day this weekend for a Manx music and dance festival.
How long do mental health patients stay in Manannan Court?
How long do patients generally spend in the mental health ward during a crisis?
Could you take over this former restaurant?
A former restaurant in the Villa Marina Arcade is up for rent.
Framework of new Sea Services Agreement ready, says minister
The infrastructure minister says the basic framework of the new Sea Services Agreement with the Steam Packet has been agreed.
