Nationwide launches new tool which could hand customers extra £560 a monthThe free calculator – helping people discover unclaimed benefits - will helps 11,000 households identify £75m in unclaimed benefits. View Image Nationwide launches new tool which could hand customers extra £560 a monthNationwide is helping people claim their unclaimed Department for Work and Pensions ( DWP ) benefits through a new calculator - supporting over 11k households. The free calculator – helping people discover unclaimed benefits - will helps 11,000 households identify £75m in unclaimed benefits. Nationwide is the first financial provider to also offer the service over telephone – addressing digital exclusion. And it has called on the Labour Party government to make it easier to access unclaimed benefits.