Question to the Department for Work and Pensions:

To ask the Secretary of State for Work and Pensions, how many working households in receipt of (a) working tax credit and (b) universal credit have marginal deduction rates of (i) less than 70, (ii) between 70 and 80, (iii) between 80 and 90 and (iv) more than 90 per cent on earned income above the level of the applicable disregard.

In 2010 we estimated that in the existing system half a million people had marginal deduction rates of 80% or above. See page 55 of Universal Credit: Welfare that Works report, below:

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/48897/universal-credit-full-document.pdf

Further information is not available as we have not updated these estimates.