David Cameron has said he hopes to serve another full term as Prime Minister if he is re-elected in 2015.
His comments come as the Prime Minister and Deputy Prime Minister Nick Clegg prepare to unveil a review of how the coalition has performed and set out its top priorities for the rest of their term.
The Prime Minister has also warned Tory critics of the power-sharing government to "stop complaining" and insisted he would not row back on same-sex marriage, child benefit cuts for the wealthiest and overseas aid commitments.
Asked if he would stay as Prime Minister until 2020, he told the Sunday Telegraph: "Yes - look, I want to fight the next election, win the next election and serve - that is what I want to do."
Mr Cameron and Mr Clegg will publish a review tomorrow of progress the coalition Government has made since 2010 and set out its top priorities for the rest of their term.
Mr Cameron told the newspaper: "This is an enormous reform agenda and that's enough to keep us all busy."
The review is expected to include details of a cap on social care costs, which ministers have considered setting at £75,000, as well as pension and child care reforms.
"In mid-term in government you are taking difficult decision, there's always going to be a tendency for people to look at protest," the Prime Minister said.
"I don't think my job is to try to identify different segments of people who are going this way or that. My job is to steer the ship in the right direction."
Mr Clegg has previously claimed the mid-term review would "surprise on the upside" by showing the Government had achieved a "great deal" of the coalition agreement.
But Labour's vice chairman Michael Dugher insisted there was "still none of the change" that the coalition leaders promised.
"They said they'd fix the economy. But living standards are still falling for the hard-working majority whilst a handful of millionaires get huge tax cuts," he said.
"They said they'd fix welfare, but the welfare bill had gone up, not down. They said they would protect the NHS and then sacked nurses.
"Families who put their trust in David Cameron and Nick Clegg's promises of change will be bitterly disappointed to see that another relaunch is all they are offering."