More than eight million households will be £1,330 better off on average next year as a result of increases to the amount of money people can earn before paying income tax, according to Treasury analysis released by Danny Alexander.

The Liberal Democrat minister said the figures showed the policy amounted to a "tax revolution" for working people, with nurses and teachers among the professions most likely to have benefited.

The Treasury Chief Secretary stressed his party had "fought tooth and nail" for the policy as both sides of the coalition sought to claim credit for the tax cuts in the run-up to May's general election.

The Treasury figures show that increases in the personal allowance from £6,475 in 2010-11 to £10,600 in 2015-16 resulted in a tax cut worth on average £825 for basic rate taxpayers.

The figures showed there were 8.3 million two-earner households that would benefit twice from the policy, with an average gain of £1,330 because not all households would have gained by the full amount.

In particular, second earners are more likely to have earnings below £10,600 so will only partially gain from the personal allowance increase.

Mr Alexander said: " This shows that our Liberal Democrat flagship policy of dramatically increasing the amount that people can earn before they pay income tax amounts to the greatest revolution in the tax landscape for working people in living memory.

"Repairing our economy after the 2008 crash has been a daunting task. Tackling it, and tackling it fairly, was the main reason that we formed the coalition in 2010 and income tax cuts for working people are top of our fairness agenda.

"Raising the personal allowance is an income tax cut for over 26 million working people worth £825 to typical basic rate taxpayers. And this new analysis reveals for the first time that dual earning households will be £1,330 better off on average."

The figures showed 784,000 nurses and 821,000 teachers will gain by the full amount of the increase in personal allowance under the current Government.

The Lib Dems have committed to raising the personal allowance to £12,500 over the next parliament.

With David Cameron stressing the Tory commitment to tax cuts, including his own promise to raise the personal allowance to £12,500, Mr Alexander was keen to put a Lib Dem stamp on the policy.

"Many will remember that the Conservatives dismissed the policy during the leadership debates running up to the election in 2010 as unaffordable," he said.

"But Nick Clegg and I have fought tooth and nail to keep the successive rises in the personal allowance on the table at every Budget."

Deputy Prime Minister Mr Clegg said: " These figures underline like never before the sheer scale of the tax cuts delivered by the Liberal Democrats for working households across Britain.

"Many, including the Prime Minister, said it could not be done, but Danny Alexander and I have cut taxes for low and middle earners while pulling our country's economy back from the brink where it was left by Labour."

"And it's not over yet. The Liberal Democrats may have cut people's taxes by £825 but if we are in government again after 2015, we will cut them by a further £380 by raising the point at which you start paying tax to £12,500."