Many motorists on Prince Edward Island jammed gas stations across the province on Sunday to beat the harmonized sales tax which comes into effect April 1.
On Monday, the cost of gasoline will shoot up by nine per cent — about eight cents a litre.
People told CBC News they are topping up their tanks trying to catch the savings while they still can.
"Well honestly it's just because the HST increase there. It's going to be quite a bump in price there tomorrow, so I thought I should save a few extra cents before the gas goes up," said Morgan Laverty at a pump in Stratford.
The governing Liberal Party said the HST is necessary to help the government pay down its $58.9 million debt.
The price of home heating oil is exempt.