IHC is a membership organisation that supports and represents New Zealanders with intellectual disabilities. It is divided into three arms: IDEA services, TimataHou, and non-government activities.
The largest arm, IDEA services, deals with service provision including the operation of supported independent living homes, supported employment, community involvement and family/whanau services.
TimataHou is a Regional Intellectual Disability Supported Accommodation Service specifically for people with intellectual disabilities and high and complex behaviour needs. Non-government activities, which are funded via fundraising activities rather than government grants, include advocacy, volunteering, and information services.