Advisers are split over the impact of the Tory u-turn on a planned rise in the inheritance tax (IHT) threshold, which was a casualty of the Con-Lib coalition negotiations.
David Cameron had said during the election campaign he would raise the band before inheritance tax liabilities to £2m for married couples; almost three times the current threshold of £650,00.
But the Lib Dems opposed the move and wanted a "mansion tax" imposed on estates valued at more than £2m.
Under the new coalition government, the allowance will remain at £350,00 per person but the decision has split advisers.
Christchurch Investment Management associate director Tony Shah says: "I fear IHT is going to become a big concern to Middle England.
"People in the South East are seeing their property value level out and creep up, and they will now start worrying about what they can leave their kids."
However, the Lighthouse Group's head of research Andrew Gadd says there is no reason those likely to be affected by IHT should have to pay, if they take the right steps.
"I stand by the stance of the former Labour Chancellor of the Exchequer Lord Jenkins of Hillhead, who said, 'Inheritance tax is a voluntary tax, paid by those who distrust their heirs more than they dislike the Inland Revenue'," he says.
An emergency Budget detailing the new Government's five-year economic plan for the country will be presented to the public within 50 days.
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