The Department for Enterprise says TT visitors spent an average of £1,015 each during this year's festival.
The figures have been released in response to a Freedom of Information request about visitors and how much they spend.
In its reply, the department published the results of a visitor survey carried out by Hampshire-based TSE research this year.
The figures show those coming to the TT were most likely to be from the UK or Ireland, aged between 40 and 60, and staying in tents.
Mountain Road to stay closed until Friday
The Mountain Road and Tholt-y-Will roads will remain closed for another day.
How much is youth crime costing the taxpayer?
How much has the government spent on tackling youth crime?
Isle of Man Foodbank looking for office manager
An Island charity which provides essentials to those who can't afford them is recruiting.
When will 20mph limits become law in Douglas and Onchan?
Infrastructure Minister Michelle Haywood will face a string of questions about new speed limits in Douglas and Onchan when the House of Keys sits next week.
3FM launches Christmas station!
In another first for the Isle of Man, 3FM has today launched a Christmas pop-up station, 3FM Christmas for the festive season!
MiCard row continues in Tynwald today
A debate into the future of benefits payments for people who don't have bank accounts will continue today.
Black Horse Offshore car loans pulled from Isle of Man
Lloyds Banking Group says it'll stop offering car loans to Island customers.
Mountain Road remains shut with weather warning in place
Temporary traffic lights won't be put out on the coast road until after rush hour this morning.
