Supported decision-making (SDM) is a process that allows people with disabilities to make their own decisions with the help of trusted advisors. It promotes self-determination, control, and autonomy, and fosters independence. It can also help people with disabilities make decisions about living arrangements, health care, relationships, and financial matters. Another benefit of SDM is that it helps people learn decision-making skills, which can lead to greater self-determination and self-esteem.

SDM can involve a variety of supports, such as friends and family, advocates, legally mandated supporters (such as attorneys, welfare guardians, property administrators and property managers), advance directives and communication tools.

Because Aotearoa NZ does not have a legal mechanism for supported decision-making as yet, people can make up their own supported decision-making agreement. These should be written down, and simply and clearly state what has been agreed in terms of the support to be given, by whom, etc.