The government risks missing its target to halve child poverty by 2010-11 by failing to commit £4bn in benefits and other measures in this year's comprehensive spending review, experts warn.
The Institute for Fiscal Studies said current taxation and benefit policies would leave the government 800,000 short of its target.
The claim followed figures showing that child poverty had risen for the first time in six years, from 2004-5 to 2005-6, and relative poverty for the whole population (see table) had grown for the first time since Labour came to power.
But the IFS predicted chancellor Gordon Brown would not commit the funds in this year's tight CSR, which covers 2008-11, to prevent money being siphoned away from public services such as health.
Instead, it said he would wait to see if increased tax revenues from economic growth could provide enough money to meet the target.
However, it added: "This increases the risk that either the child poverty target will be missed or that new tax-raising measures will be needed."
Conservative conference coverage
01 October 2008
Gordon Brown: Labour will legislate to end child poverty by 2020
24 September 2008
Labour Party conference 2008 coverage
25 September 2008
Couple investigated over 12 deaths at care home
24 September 2008
Phil Hope succeeds Ivan Lewis as adult social care minister
Action on Elder Abuse says personalisation is used to cut costs
Details of government consultations
02 October 2008
Private Member Bills
25 July 2008
Government Legislation
25 July 2008