For caregivers of individuals under 18 with a disability. The child disability benefit (CDB) is a tax-free monthly benefit made to guardians who care for a child under the age of 18 with a severe and prolonged impairment in physical or mental functions. This is based on income, child must be approved for the Disability Tax Credit and caregiver must be receiving the Canada Child Benefit. Automatically receive 2 years of retroactive pay See the Government of Canada website for more information