Work and Pensions Committee
Work and Pensions Secretary Iain Duncan Smith rejected claims his flagship welfare policy is a "debacle" on 9 December 2013.
Mr Duncan Smith was being questioned by MPs on the Work and Pensions Committee amid fears the Universal Credit system would miss key targets and concerns over the IT system being used.
He said £40.1m had been written off on software and computing costs in implementing the new system.
Labour claims only a fraction of those expected to be switched to the new benefit will transfer over on schedule.