Up to £50 million of government contracts could be diverted to local businesses each year.
The government's made changes to its contracting policies under World Trade Organisation rules which lets it favour Manx-based companies.
The new policy means up to 94% of government spending could be directed into the local economy.
Treasury minister Dr Alex Allinson says the rules can be changed after Brexit meant we don't have to follow EU law.
£20k for 24 days work a year as Steam Packet director
Popular Douglas cafe up for sale
Company reveals hopes for Swiss Chalet
Premium estate agent launches new license on Island
Signs approved for estate agent's new office
Number of aircraft registered here declining since 2022
Post Office profits up by over a million pounds
Information Commissioner partners with Jersey