gilt-edged securities. Interest on the 'Call Notice Deposits' is paid back into the NIF – around £1.3 billion in the 2007/08 year. The balance in the National Insurance Funds can be seen on the website of the Debt Management Office. Levels of benefit and contributions are set following the advice of the Government Actuary, who recommends that a prudential balance of two months contribution revenue (about £8 billion) should be kept in the fund. See also Pension Frozen pension References External links 2005 Report on the Fund by the National Audit Office. (United Kingdom)|Debt Management Office. Insurance in the United Kingdom Taxation in the United Kingdom Social security in the United Kingdom National Insurance