What Is Supported Decision-Making?

Supported decision-making is the process of helping a person with disability to make their own decisions by providing them with the information, assistance, and support they need to understand their options and communicate their choices. The key distinction is that the person retains the final decision-making authority — the supporter assists but does not decide.

Under the NDIS framework, supported decision-making is grounded in several legislative provisions:

For NDIS providers, supported decision-making is not optional. It is a core practice requirement that auditors assess during every certification audit. Providers must demonstrate that they actively support participants to make their own decisions rather than making decisions for them or defaulting to substitute decision-makers without first attempting supported approaches.


Supported vs Substitute Decision-Making

Understanding the distinction between supported and substitute decision-making is essential for every NDIS provider. The two approaches exist on a spectrum, with supported decision-making being the preferred approach and substitute decision-making being a last resort.

Aspect Supported Decision-Making Substitute Decision-Making
Who decides? The participant, with support The substitute decision-maker (guardian, nominee, attorney)
When used? Always the first approach — used whenever the participant has capacity (with support) to make the decision Only when the participant lacks capacity for the specific decision and supported decision-making has been tried and is insufficient
Legal basis NDIS Act s.4(8), Practice Standards Outcome 1.4, UNCRPD Article 12 State/territory guardianship legislation, NDIS Act s.86 (nominees)
Participant's role Active decision-maker — weighs options and communicates choice May be consulted but does not have final authority for the specific decision
NDIS preference Strongly preferred — aligns with person-centred principles Last resort — removes participant autonomy for the specified decisions

The Hierarchy of Decision-Making Support

The NDIS Commission and Australian guardianship law recognise a hierarchy of support, from least restrictive to most restrictive:

  1. No support needed — the participant makes the decision independently
  2. Informal support — a trusted person (family member, friend, support worker) helps the participant by providing information, discussing options, or helping them communicate their decision
  3. Formal supported decision-making — a formally recognised supporter assists the participant within a structured framework (some states have specific supported decision-making legislation)
  4. Co-decision-making — the participant and a formally appointed co-decision-maker must agree on a decision (available in some jurisdictions)
  5. Substitute decision-making — a guardian, nominee, or attorney makes the decision on the participant's behalf

Providers should always start at the top of this hierarchy and move down only when less restrictive approaches have been tried and are insufficient for the specific decision at hand.


Guardianship and supported decision-making legislation varies across Australian states and territories. While the NDIS Act and Practice Standards are national, the appointment and powers of guardians and other substitute decision-makers are governed by state and territory law.

Jurisdiction Key Legislation Tribunal
VictoriaGuardianship and Administration Act 2019VCAT
New South WalesGuardianship Act 1987NCAT
QueenslandGuardianship and Administration Act 2000QCAT
South AustraliaGuardianship and Administration Act 1993SACAT
Western AustraliaGuardianship and Administration Act 1990State Administrative Tribunal
TasmaniaGuardianship and Administration Act 1995Guardianship and Administration Board
ACTGuardianship and Management of Property Act 1991ACAT
Northern TerritoryAdult Guardianship Act 1988Local Court

Victoria's 2019 Act is notable because it was the first Australian jurisdiction to explicitly legislate a preference for supported decision-making over guardianship. It introduced the principle that a guardianship order should only be made if it is the least restrictive means available to achieve the purpose of the order. Other jurisdictions are progressively moving in this direction, and the NDIS Commission's national expectations align with this trend.


Guardianship: When and How It Applies

Guardianship removes a person's autonomy for specified decisions and transfers that authority to a guardian. It is the most restrictive form of substitute decision-making and should only be pursued when less restrictive alternatives have been exhausted.

Types of Guardianship

Provider Obligations When a Guardian Is Involved


Implementing Supported Decision-Making in Practice

Supported decision-making is a skill that support workers and coordinators must develop through training and practice. Here are practical strategies for implementing supported decision-making in daily service delivery.

Step 1: Identify the Decision

Clearly identify what decision needs to be made. Is it a routine daily decision (what to eat, what to wear), a medium-stakes decision (changing a support arrangement, attending a new activity), or a high-stakes decision (entering a service agreement, moving house, consenting to a medical procedure)? The level of support required will depend on the complexity and consequences of the decision.

Step 2: Provide Information in an Accessible Way

Present the options and relevant information in a format the participant can understand. This might mean using simple language, visual aids, Easy Read documents, real objects (showing actual food options rather than just describing them), pictures, social stories, or interpreter services. The information should cover what the options are, what might happen with each option (benefits and risks), and that the participant has the right to choose.

Step 3: Support Understanding

Check that the participant understands the information. Ask open-ended questions rather than yes/no questions. Give the participant time to process — some participants need significantly more time than others. Revisit the information if needed, using different formats or approaches.

Step 4: Support the Decision

Help the participant weigh the options based on their own values, preferences, and goals. Do not impose your own views or steer the participant toward the decision you think is best. If the participant makes a choice that involves risk, follow the dignity of risk process rather than overriding their decision.

Step 5: Communicate and Implement

Help the participant communicate their decision to anyone who needs to know. Implement the decision and follow up to ensure it is being respected.

Step 6: Document

Record the decision-making process in the participant's file, including what information was provided, how it was communicated, the participant's understanding, and the final decision. This documentation is critical for audit compliance and for demonstrating that supported decision-making was genuinely practised.


Dignity of Risk in Decision-Making

Dignity of risk is the natural companion of supported decision-making. When a participant is supported to make their own decisions, they will sometimes make choices that involve risk. The provider's obligation is to respect these choices while ensuring the participant was informed about the risks.

The Dignity of Risk Assessment form (Document 37 in the SIL Rescue Kit) provides a structured approach to documenting dignity of risk decisions. It should be used whenever a participant makes a decision that involves identified risk and the provider wants to create a formal record of the risk discussion and the participant's informed choice.

Common Dignity of Risk Scenarios in SIL

In each case, the provider's role is to inform, document, and respect — not to prohibit, restrict, or override.

Dignity of Risk Assessment Template

The SIL Rescue Kit includes a Dignity of Risk Assessment form (Document 37) that documents the risk discussion, participant understanding, and informed choice — exactly what auditors need to see.

Get the SIL Rescue Kit — $297

Easy Read Materials and Communication Supports

Easy Read materials are one of the most practical tools for supported decision-making. They transform complex information into simple, accessible formats that help participants with intellectual disability, cognitive impairment, or limited literacy to understand their options and make informed choices.

What Makes a Good Easy Read Document?

Documents That Should Have Easy Read Versions

Other Communication Supports

Easy Read is not the only tool available. Depending on the participant's communication needs, providers may also use:


Documenting Participant Choices

Documentation is the evidence that supported decision-making occurred. Without documentation, auditors cannot verify that the provider practised supported decision-making — regardless of how well it was done in practice.

What to Document for Every Significant Decision

Where to Document


Staff Training Requirements

Support workers are on the front line of supported decision-making. They are the people who assist participants with daily choices, explain options, and document decisions. Without adequate training, even the best policies will fail in practice.

Training Topics

Training should be included in the staff induction process (Document 32 in the SIL Rescue Kit includes supported decision-making items) and refreshed annually. Include scenario-based exercises to help staff practise these skills in realistic situations.


What Auditors Look For

During a certification audit, the NDIS Approved Quality Auditor will assess your compliance with Outcome 1.4 (Independence and Informed Choice) through multiple evidence sources.

Document Review

Staff Interviews

Auditors will ask frontline staff questions such as:

Participant Interviews

Auditors will ask participants (with their consent):

Positive participant feedback — combined with documented evidence in files — is the strongest possible indicator of compliance with Outcome 1.4.

Important: This article provides general guidance about NDIS compliance requirements. It is not legal or professional advice. Requirements may change as the NDIS Commission updates its policies and Practice Standards. Always verify current requirements with the NDIS Quality and Safeguards Commission or a registered NDIS consultant before making compliance decisions.