As members of households can change overtime and one individual may have been in several tax credits awards, overpayments are calculated and recovered on the basis of awards rather than households.
Figures at household level are available only at disproportionate cost.
Information on the number of awards that have been overpaid each year is available in the HMRC publication “Child and Working Tax Credit Statistics. Finalised Awards 2007-08. Supplement on Payments in 2007-08”. This is available on the HMRC website at