World T20 champions West Indies humbled India by nine wickets in a chase of 191.
ICC match referee David Boon imposed the fine after Carlos Brathwaite's side was ruled to be one over short of its target when time allowances were taken into consideration.
"In accordance with Article 2.5.1 of the ICC Code of Conduct for Players and Player Support Personnel, which relates to minor over-rate offences, players are fined 10 per cent of their match fees for every over their side fails to bowl in the allotted time, with the captain fined double that amount," an ICC release said.
If West Indies commit another minor over-rate breach in a T20I within 12 months of this offence with Brathwaite as captain, it will be deemed a second offence by Brathwaite and he will face a suspension.
Brathwaite pleaded guilty to the offence and accepted the proposed sanction, ruling out the need for a formal hearing.
The charge was levelled by on-field umpires Nigel Duguid and Leslie Reifer, third umpire Joe Wilson and fourth umpire Patrick Gustard.