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.
Tin bath races mean bus diversions tomorrow
Bus Vannin's warning of some disruption in the south of the Island tomorrow as an iconic Manx sporting event gets underway.
MHK wants backing for changes to Tynwald members' pay
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Storage firm announces closure
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Mountain Road shut for skate setup later
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Bus diversions for tin bath day tomorrow
Bus Vannin's warning of some disruption in the south of the Island tomorrow as an iconic Manx sporting event gets underway.
MP criticises Island's fishing visa rules in Westminster
A Northern Irish MP says his constituency's fishing fleet is facing a major threat because of changes to Isle of Man visa rules.
Post Office won't release Evri documents as courier prepares to leave Island
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Strix to shut Ramsey factory
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