How long do u have to be in a NHS Hospital before your state pension is stoped. You will stop getting your Pension Credit once your Attendance Allowance or Disability Living Allowance stops, usually after 28 days in hospital.report this answer. Updated on Sunday, February 05 2012 at 04:25AM GMT.Source: www.dwp.gov.uk/...ou will stop getting your Pension Credit once your Attendance Allowance or Disability Living Allowance stops, usually after 28 days in hospital.