HMRC has paid £65 billion to tax credit claimants since the scheme was introduced in 2003. Awards are made on an annual basis and payments are initially made on provisional data; a final assessment is made once the claimant's actual circumstances are known after the end of the year, which can change the final value of the award. The Department overpaid £6 billion in the first three years of the scheme. By the end of March 2007 it had collected £2 billion of this debt and written off £0.7 billion. £3.3 billion of these overpayments remain to be collected. It is unlikely to recover £1.6 billion of the debts.

This is the Committee's fifth report on the current tax credits system. Although the administrative cost has increased from £406 million in 2003-04 to £587 million in 2006-07, there is little evidence the Department has the scheme under control. Many claimants continue to struggle to understand tax credits and why they are overpaid. There have been many complaints about the process for recovering overpayments and the Ombudsman continues to receive and to uphold a large number of complaints.

Tax credits continue to suffer from the highest rates of error and fraud in central government. HMRC estimates that claimant error and fraud led to incorrect payments of between £1.04 billion and £1.30 billion in 2004-05. This level of error led the C&AG to qualify his opinion on the HMRC Trust Statement for the fifth year running. The Department still has no targets for reducing error and fraud.

In November 2005, the Department concluded a settlement of £71.25 million with EDS in respect of the computer problems during the introduction of Tax Credits. Of the sum, £26.5 million depends on EDS winning future work from the Government, but the flow of payments from EDS has been extremely small, and it is highly unlikely that new business to EDS will generate the full payment.

Progress in addressing many of the Committee's previous recommendations on tax credits has been disappointing, and the Committee will wish to return to this subject in the future to establish the extent to which these difficulties have been addressed.

On a separate issue, the Department has not been collecting income tax on certain small pensions since the early 1980s, with a potential tax loss of some £135 million per annum. It will not recover tax due from previous years, but will start to collect tax on these pensions from 2008-09.