The Conservatives have vowed to abolish taxes on savings in the first of a series of announcements detailing the party's pre-election tax promises.
Shadow Chancellor Michael Portillo says a Tory administration would scrap taxes on savings for people earning less than £32,000.
The move would apply to bank and building society accounts as well as taxes on share dividends.
The party says it would implement the measures in the 2003/04 tax year.
But product providers wonder whether the measures would affect stakeholder pensions because the breaks are targeted at the same market.
Portillo says: “We will sweep away one of the great injustices of the tax system, that people have to pay tax on the income they earn but then pay tax again when they put some of that income away and earn interest on it.”