What Evidence Do You Need for an NDIS Application?
The NDIS application evidence you need — who fills in what, how to prove functional impact, and how to avoid the gaps that cause delays.
Strong NDIS application evidence has two parts: proof of your condition (a diagnosis, confirmed by a treating professional) and proof of how that condition affects your everyday life — your ability to move around, communicate, learn, self-care, socialise and manage daily tasks. The National Disability Insurance Agency (NDIA) decides access on that functional impact, not on a diagnosis alone. This…
The two things your evidence has to prove
Who provides your evidence — and why it matters who writes it
The Supporting Evidence Form (and when to use your own reports)
What good functional-impact evidence actually looks like
A real-life scenario
Evidence checklist: what to gather before you apply
Evidence for children applying to the NDIS
How the coming eligibility changes affect your evidence
Common evidence mistakes that cause delays
What happens after you submit — and if it's not enough
Where to get help gathering evidence
Frequently asked questions
Do I need a formal diagnosis to apply for the NDIS?
For most people, yes — the NDIA needs a treating professional to confirm your condition. But a diagnosis on its own is not enough. You also have to show how the condition permanently and significantly affects your everyday functioning. The diagnosis proves what you have; the functional evidence…
How recent does my evidence need to be?
Anything describing your current daily function should generally be recent — often within the last 6 to 12 months — so it reflects your situation now. Confirmation of a lifelong or unchanging diagnosis can be older. If you're unsure whether a report is current enough, ask the NDIA or update it with…
Who is the best person to write my evidence?
The professional who knows you and treats your condition, and who can describe your day-to-day function — not just someone who can name a diagnosis. Depending on your disability that might be your GP, a specialist, or an allied health professional like an occupational therapist. Evidence from…
What if my application is knocked back because of my evidence?
A rejection is often a specific evidence gap rather than a permanent 'no'. Read the NDIA's reasons closely, then go back to the right professional to fill the gap. You can request an internal review and, if needed, a review at the Administrative Review Tribunal, and free advocacy help is available…
Should I pay a company that promises to get me approved?
No one can guarantee NDIS access, so be cautious of anyone who says they can. Free, independent help is available through the NDIA, Local Area Coordinators and disability advocates. Put your money toward good clinical assessments from your treating professionals instead.