NDIS Eligibility: Who Qualifies and How to Apply

Thousands of Australians go through the NDIS access process each year without fully understanding what the NDIA is actually assessing. Many are declined not because they aren’t genuinely disabled, but because they didn’t provide the right type of evidence. Others apply before they have the necessary documentation, causing delays that set them back months.

Here’s what you actually need to know before starting the process.

The three eligibility criteria

To access the NDIS, you must meet all three criteria at the time you apply:

1. Age — You must be under 65 when you first apply. If you’re over 65 when a disability is diagnosed or becomes significant, you’d typically be directed to the aged care system instead.

2. Residency — You must be an Australian citizen, permanent resident, or Protected Special Category Visa holder who lives in Australia.

3. Disability — This is where most applications succeed or fail. The NDIA assesses whether you have a disability caused by a permanent impairment that substantially reduces your functional capacity in at least one of the following areas:

• Communication
• Social interaction
• Learning
• Mobility
• Self-care
• Self-management

The disability must arise from an impairment that is, or is likely to be, permanent. Conditions that fluctuate or have periods of full remission can still qualify if the overall trajectory is one of permanent limitation — but this needs to be clearly supported in the evidence.

What “permanent” means under the NDIS

The NDIS uses “permanent” to mean that the condition is not expected to be cured or substantially improved by available treatment. It doesn’t mean the condition can’t fluctuate or that symptoms can’t be managed.

Many people assume their condition doesn’t qualify because they have good periods or because treatment has helped. The relevant question isn’t “are you sometimes well?” — it’s “is the underlying impairment expected to remain?” A person with schizophrenia whose symptoms are managed by medication still has a permanent impairment — the condition and its functional impact don’t disappear when medication is working.

What about the Early Intervention pathway?

There’s a second pathway into the NDIS for people who don’t yet have a permanent disability but where early intervention supports could reduce the long-term impact of a condition — particularly for children.

The Early Intervention criteria are separate and more specific. They’re most commonly used for children with developmental delays, autism, hearing or vision impairment, or other conditions where early support changes the long-term trajectory.

How to apply

Applications go through the NDIA. The process starts with an Access Request Form.

You can start by:

• Calling the NDIA on 1800 800 110 and having an access conversation
• Submitting an access request online through the NDIS portal (myplace)
• Working with an LAC (Local Area Coordinator) to lodge your request

Before you make that call or submit the form, have your supporting evidence ready. The NDIA will request it during the assessment process, and having it prepared in advance reduces delays significantly.

What evidence do you need?

This is where most applications either succeed or struggle.

The NDIA wants evidence that:

1. You have the relevant impairment (diagnosis)
2. The impairment is permanent
3. The impairment substantially reduces your functional capacity

What qualifies as evidence:

• A detailed report from a specialist (psychiatrist, neurologist, paediatrician, orthopaedic surgeon, etc.) that covers diagnosis, prognosis, and functional impact
• A GP summary letter that consolidates the clinical picture if you have multiple treating providers
• An occupational therapy functional capacity assessment — this is specifically designed to answer the NDIS’s functional questions and is often the most persuasive single document
• Reports from allied health providers (speech pathologist, physiotherapist, psychologist) that describe functional limitations
• Psychological or neuropsychological assessment where cognitive or psychiatric impairment is a factor

What doesn’t help much:

• Diagnosis letters that only state the condition without addressing functional impact
• Old reports that don’t reflect current functioning
• Letters from treating providers who are unfamiliar with the NDIS framework and write in clinical rather than functional terms

The most common reason applications are delayed or declined is insufficient evidence of functional impact — not absence of a genuine disability.

What happens after you submit?

The NDIA has 21 days to make a decision on your access request (from when they have all the required information). In practice, particularly for complex applications or where more evidence is requested, the timeline can extend.

You’ll receive written notification of the decision. If approved, you move to the planning stage where your specific funded supports are determined.

If declined, you have the right to request an internal review and, if necessary, appeal to the Administrative Appeals Tribunal (AAT). Many applications that are initially declined succeed on review when additional evidence is provided.

If you’re applying with a psychosocial disability

Mental health applications require particular care in how functional evidence is framed. Treating clinicians often write in diagnostic terms that don’t map directly to the NDIS’s functional criteria — which can result in underrepresentation of the genuine impairment.

When requesting reports from your psychiatrist or psychologist, ask them to specifically address:

• How your condition affects your daily functioning across the NDIS functional domains (communication, social interaction, self-care, self-management, learning, mobility)
• Whether the impairment is expected to be ongoing
• The history and frequency of episodes, relapses, or hospitalisations that demonstrate persistence

An NDIS-experienced psychologist or OT can also provide a functional capacity assessment that speaks the NDIA’s language in a way that clinical treating reports often don’t.

If you’re on the Gold Coast or Central Coast and trying to navigate an NDIS access application — or if you’ve been declined and want to understand your options — Oliver is happy to talk through it.

Call 0423 364 723 or email oliver@thriveinlifecare.com.au.