There is no doubt that many and even some in the coalition would like to abolish higher-rate tax relief on pensions. Higher rate tax relief on pensions is normally claimed through an adjustment to your tax code, which incidentally needs to be requested from HMRC or via your self assessment tax return.
Currently people can save up to £50,000 into a pension (tax year 2011/2012), however reliable sources  are suggesting that the Government is considering reducing this annual allowance to £40,000 or £30,000 instead.
a simple reduction of £10,000 to the maximum allowable pension contribution would effectively cost higher-rate taxpayers up to £4,000 in lost tax tax relief each year. And for those on the highest rate of tax (50%) they would lose £5,000 of tax relief.
With the Budget Day set for the 21st March and a history of previous changes to pension rules have been introduced with immediate effect, now is a very good time to consider making an additional pension contribution. Previous tax changes to pension have been introduced with special rules designed to prevent anyone circumventing the changes, so beware, plan in advance whilst there is still time.
Changes to the annual allowance are easier to implement than completely abolishing higher-rate tax relief. And would still only affect higher earners who can afford to save large amountss into their pension each year.