Will National Insurance increase help or hinder the economy?
The executive chairman of Marks and Spencer, Sir Stuart Rose, has accused Gordon Brown of insulting the intelligence of businesses over Labour's plans to raise National Insurance. Who is right on National Insurance?
Business leaders of more than 60 top companies have backed the Conservatives' opposition to a rise in National Insurance
Gordon Brown will argue that the Conservative plans would put the economic recovery at risk by removing £6bn from the economy in 2010, and business leaders who have signed up to the Conservative plans have been "deceived".
The Lib Dems have said the dire state of the public finances mean they cannot oppose the NI increase but say their focus is on taking the lowest-paid people out of tax altogether.
How will a National Insurance increase affect you? How important is this issue? Do you have a personal experience to share?