Government departments will have to pay for Treasury loans in the future.
From 2015, a one per cent charge on the borrowing amount will have to be paid.
Treasury Minister Eddie Teare announced the initiative during a sitting of the Economic Policy Review Committee.
He outlined why he's bringing in the policy:
Total cost of 20mph scheme expected to be £400,000
Rollout expected to be completed by the end of 2026
New political members join health department
Minister Without Portfolio among those appointed to DHSC
More details on first Isle of Man Wetherspoons
'The Conister Arms' to open on 14 May
Anti-social behaviour causes 'damage beyond repair' to Castletown toilets
Commissioners say soap dispensers were nearly a week old