Central government grant funding to local authorities is being cut by over a quarter in real terms (£7.6 billion) between 2011 and 2015. The Department for Communities and Local Government is also introducing fundamental changes to the local government finance system with reforms to business rates and council tax benefits, so the pressures on the sector are set to increase. The Department does not properly understand the overall impact on local services that will result from the funding reductions, nor has it modelled how funding changes may adversely affect other areas of the public sector. It must improve its ability to foresee what effects the full package of funding reductions and reforms will have on local authority areas, particularly for those authorities which face higher deprivation levels. Local authorities' statutory duties have stayed broadly the same, and in some areas, such as adult social care, the demand for services is increasing. There is a risk that the worst-affected councils will be unable to meet their statutory obligations, threatening their viability. The Department must clarify its plans to respond if councils become unviable. More information is needed to understand councils' spending and performance. The Department did not make clear how it will monitor councils' ability to cope with funding changes, or the extent to which they are able to do this by increasing efficiency rather than reducing services. Neither has it demonstrated that the information published is sufficient to provide assurance on the value for money with which councils spend their resources.