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Gordon Brown has said he would take "full responsibility" if Labour fails to win the general election.Joined by his wife Sarah on GMTV, he said he would take responsibility for "whatever happens" on 6 May.
The prime minister said that if he "couldn't make a difference anymore, I'd go off and do something else".
Despite some Labour ministers now calling for tactical voting, Mr Brown said he wanted people to vote Labour, saying the party could still win.
'Go off'
Mr Brown was asked whether, if people turn their back on Labour, it would be because of the party in general or him personally.
"Well I'll have to take responsibility, and I will take full responsibility if anything happens," replied the prime minister.
"But I still think there are thousands of people who've still to make up their minds."
Mr Brown was then questioned about whether he would stand down if it meant Labour could stay in power in the event of a hung parliament.
He replied: "Well I don't think it'll work that way, but if I couldn't make a difference anymore I would go off and do something else."
'Serious party'
Mr Brown said he might do charity or voluntary work, and that he didn't "want to do business or anything else - I just want to do something good".
The prime minister said Labour was the "serious party", in contrast to the Conservatives and the Liberal Democrats.
"The Conservatives are too big a risk, the Liberals can't explain what they are doing - their policies don't add up," he said.
Mr Brown also returned to his warning that millions of people would miss out on child tax credits under Tory and Lib Dem plans.
"I felt so passionately about what is happening to child tax credits," he said. "Six million people benefit from them... it is wrong to take them away."
The Conservatives are proposing that parents earning more than £50,000 between them will not get the credits, while the Lib Dems have also proposed to restrict them.
Tactical voting
The Tories say their plans to cancel most of Labour's planned 1% rise in National Insurance would leave the majority of families better off, while the Lib Dems propose to abolish income tax for the first £10,000 of earnings, which they say will help people on low and middle incomes.
As the opinion polls continue to suggest there will be a hung parliament - or a small Conservative majority - two Labour ministers have been urging people to vote tactically in marginal seats "to keep the Tories out".
Schools Secretary Ed Balls said that while he always wanted Labour to win, he recognised there was "an issue" in Lib Dem/Tory marginals.
Meanwhile, Welsh Secretary Mr Hain said people should "vote with their heads, not their hearts".
The Lib Dems called the comments "desperate", while David Cameron said it showed voting Lib Dem vote could keep Mr Brown as prime minister.
Personal attack
While Mr Brown continues to say the electorate will come round to Labour when they focus on the parties' policies, his leadership has come under fire after a Labour candidate launched a stinging personal attack against him.
According to a newspaper report, Labour's North West Norfolk candidate Manish Sood said: "I believe Gordon Brown has been the worst prime minister we have had in this country.
"It is a disgrace and he owes an apology to the people and the Queen."
The Labour candidate said immigration was too high, and as a result was "creating friction within communities", adding "the country is getting bigger and messier".
He then went on to attack Labour's government ministers.
"The role of ministers has gone bureaucratic and the action of ministers has gone downhill - it is corrupt," said Mr Sood.This article is from the BBC News website. ? British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.