[holding answer 8 February 2010]: The available information is in the table:
£ Continuously reviewed Income support 250 million Jobseeker's allowance 80 million Pension credit 110 million Housing benefit 260 million Incapacity benefit1 70 million Instrument of payment 10 million Occasionally reviewed Disability living allowance 50 million Retirement pension 0 million Carer's allowance 50 million Interdependencies2 10 million Unreviewed3 Unreviewed (excluding CTB) 110 million Council tax benefit4 50 million Total5 1.1 billion 1 All incapacity benefit figures are taken from the 2008-09 incapacity benefit continuous measurement exercise. 2 "Interdependencies" is an estimate of the knock-on effects of disability living allowance overpayments on caring and disability premiums on income-related benefits, which depend on the rate of disability living allowance in payment. 3 The rate of fraud and error on unreviewed benefits has been estimated. Where suitable proxies exist, percentage-of-expenditure results from reviewed benefits that are similar are used. Where such proxies are not available the average of all measured benefits has been used. 4 The estimate of fraud and error in council tax benefit is based on the results of measurement of housing benefit, adjusted to account for the greater proportion of pensioners in receipt of council tax benefit. 5 Columns may not sum to totals due to rounding. Note:Customer fraud in income support also resulted in approximately £10 million of underpayments, which is not included, or netted off in this table. Sources: 1. Published National Statistics. 2. Fraud and Error in the Benefit System: April 2008 to March 2009.