Functional capacity

How your disability affects everyday activities — the focus of NDIS evidence.

What it means

Functional capacity describes how your disability affects your ability to do everyday activities. Rather than focusing on a label or diagnosis, it looks at what you can and cannot do in practical areas of life, such as mobility, self-care, communication, learning, social interaction and managing daily life.

This matters because the NDIA focuses on functional impact, not diagnosis alone. Two people with the same condition can have very different day-to-day needs, so the NDIS wants to understand how your disability actually affects your life. That is why evidence, often from an occupational therapist, describes your function: what support you need, where you face barriers, and how these change across different settings and times of day.

In practice

Understanding your functional capacity helps shape what supports are reasonable and necessary. Assessments look at how independently you can carry out tasks, whether you need help or equipment, and how much your disability limits your participation. This picture then informs decisions about supports like personal care, assistive technology or skill building.

Good evidence describes function clearly and honestly, including on your harder days, not just your best. A functional capacity assessment, often completed by an occupational therapist, may involve observation, questions and standardised tools. Because your capacity can change, it can be helpful to keep this evidence up to date so your plan continues to reflect your real needs and goals.

A real example

For example, Josh has a condition that affects his memory and concentration, so his occupational therapist assessed his functional capacity rather than relying on his diagnosis alone. The report described how he manages self-care and cooking safely, where he needs prompting to stay on track, and how his abilities vary from day to day. This gave the NDIA a clear picture of the everyday support Josh genuinely needs.

Functional capacity — FAQs

What does functional capacity mean?
Functional capacity is how your disability affects your ability to do everyday activities. It covers areas like mobility, self-care, communication, learning, social interaction and managing daily life. Instead of focusing on your diagnosis, it looks at what you can and cannot do in practice, and where you need support. This gives a realistic picture of your day-to-day needs and helps shape the supports that are right for you.
Why does the NDIA focus on function rather than diagnosis?
The NDIA focuses on functional impact because a diagnosis alone does not show how your disability affects your daily life. Two people with the same condition can have very different needs. By looking at function, the NDIS can understand the practical barriers you face and decide what supports are reasonable and necessary. That is why evidence describes what you can do and where you need help, not just your condition.
Who completes a functional capacity assessment?
A functional capacity assessment is often completed by an occupational therapist, though other allied health professionals may be involved depending on your needs. They may use observation, questions and standardised tools to describe how you manage everyday tasks. The aim is a clear, honest picture of your function across different areas and settings, which the NDIA uses to help decide the supports you need.
What areas does functional capacity look at?
Functional capacity looks at everyday areas including mobility, self-care, communication, learning, social interaction and managing daily life. It considers how independently you can do tasks, whether you need help or equipment, and how much your disability limits your participation. Looking across these areas gives a rounded picture of your needs, since your disability may affect some parts of daily life more than others.
How can I prepare for a functional capacity assessment?
It helps to think about your everyday activities honestly, including your harder days, not just your best ones. Note tasks you find difficult, where you need help or prompting, and any equipment you use. Sharing examples and being open about the barriers you face gives the assessor an accurate picture. Keeping any existing reports handy can also help describe your function clearly and consistently.

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