Background
Given decreased formal supports for adults with intellectual and developmental disabilities (IDDs) in many industrialised countries, we need to know more about informal, or natural, supports.
Method
Adult siblings (N = 632) responded to a web‐based survey about the informal supports received by their brothers/sisters with IDDs.
Results
Informal support was organised by the life domains of recreation, employment and housing. Adults with IDDs received the most extensive informal support in recreation and the least extensive in housing; low levels characterised all domains. Individuals with greater numbers of supporters in a domain experienced higher levels of support, as did those residing with family and who received more state‐supported, formal benefits.
Conclusions
Unpaid, informal supports supplement the support needs of adults with IDDs. Connections between formal and informal supports for adults with IDDs need to be examined further.