The Kuwaiti cabinet Monday decided to raise petrol prices by more than 80 percent from September 1 as part of economic reforms aimed at countering falling oil revenues.
A statement after the weekly cabinet meeting said the price of low octane petrol will rise by 41 percent to 28 US cents a litre while high grade petrol will increase by 61 percent to 35 cents.
It also decided to raise the price of environmentally friendly low-emission "ultra" petrol by 83 percent to 55 cents a litre.
These are the first increases in heavily subsidised petrol prices in the OPEC member for almost two decades.
The Gulf state liberalised the prices of diesel and kerosene in January 2015 and revises their prices monthly.
The Kuwaiti cabinet said a government committee will revise the new petrol prices every three months depending on international oil prices.
In April, parliament approved a government-sponsored bill to raise electricity and water prices paid by foreign residents and businesses, but exempted citizens.
This increase, the first in almost 50 years, will take effect from September next year.
Kuwait has posted a budget deficit of $18.3 billion in the past fiscal year, according to provisional figures, following 16 years of windfall due to high oil prices.
It is projecting a deficit of $29 billion in the current 2016/2017 fiscal year.
The emirate is home to 1.3 million native citizens and around 3.0 million foreigners.