"It's a process of fiscal consolidation. The market will feel more confident if we can bring down our fiscal deficit," he said.
Malaysia's economy and financial markets face risks from rising domestic debt, a swollen fiscal deficit and a shrinking current account surplus. The central bank recently cut the country's growth forecast this year to 4.5-5 per cent, while Fitch Ratings lowered Malaysia's credit rating outlook to negative from stable, citing a lack of fiscal reforms.
The budget deficit hit 4.5 percent of gross domestic product last year.
Najib said the central bank is closely monitoring the Malaysian ringgit, which has shed more than 7 percent against the U.S. dollar this year.
"It is not giving us any undue stress for the time being. What we believe in is to focus on strengthening the fundamentals of the economy," he said.