The prime minister said that he already get approval from King Sultan Muhammad V in this regard.
On Friday, Mohamad said it would be a "dirty election".
The 64-year-old ruling party leader has come under pressure from various quarters, including the worldwide community for several high-profile issues including the multi-billion dollar fund mismanagement of a state investment arm, questionable management of Felda and Mara investments, rising cost of living and accusations of corruption and cronyism.
"If victory is given to BN, we promise to do our best, to carry out a bigger, more inclusive and more comprehensive transformation of the country", Najib said.
Meanwhile, EC chairman Tan Sri Mohd Hashim Abdullah confirmed to Bernama that he received notice on the dissolution through email and would hold a special meeting to determine the important dates for the GE14.
Najib's announcement comes on the back of robust growth for Malaysia, buoyed by a recovery in global crude oil prices and increased trade and infrastructure investment from Malaysia's largest trading partner, China.
The polls are seen as a test of survival for scandal-tainted Prime Minister Najib Razak, who is widely expected to win but under pressure to improve the performance of his long-ruling National Front coalition after support eroded in the last two elections.
But a weaker result, even if the coalition retains power, could lead to an internal leadership challenge against Najib.
Mr Najib has denied any wrongdoing.
Najib has clung on to power despite being embroiled in a corruption scandal that involved hundreds of millions of dollars passing through his bank accounts believed linked to the 1MDB state fund. Transactions related to 1MDB are under investigation in six countries including the United States, Singapore and Switzerland.
Despite the scandal, he is tipped to cruise to a new five-year term.