HC Deb 09 April 1975 vol 889 c419W
Mr. Biffen

asked the Chancellor of the Exchequer what would be the estimated loss to Exchequer revenue if self-employed national insurance contributions were made tax deductible.

Mr. Robert Sheldon:

Information on which to base a precise calculation is not available but it is estimated that the full-year cost at 1974–75 rates of tax would be about £80 million.