NDIS Plan Rejected SA? 5 Reasons & How to Fight Back 2026
Is a Rejected or Underfunded NDIS Plan Really the End?
Your NDIS plan has been rejected — or the funding you received barely covers your actual support needs. You followed every step, gathered your medical reports, explained your daily living challenges in detail, and still the National Disability Insurance Agency (NDIA) said no.
If you are a participant or carer in South Australia, here is the most important fact you need to know right now: a rejected or underfunded NDIS plan is a reviewable decision — and you have the right to fight back.
In this guide, Nurse Aid Australia — a registered NDIS provider with 25 years of experience supporting participants across Adelaide, Mawson Lakes, Elizabeth, and Marion — breaks down the 5 most common reasons NDIS plans get rejected, explains your Section 100 internal review rights, and walks you through exactly how to challenge the decision in 2026.
What Is a Section 100 Internal Review?
A Section 100 internal review is a free, formal process under the NDIS Act 2013 where a different NDIA officer re-examines a decision you disagree with. You must request it within 3 months of receiving the decision in writing. No lawyer is required, and the NDIA must respond within 60 days.
Who Can Request a Section 100 Review?
Any NDIS participant in South Australia — or their nominated representative — can request a Section 100 internal review if they disagree with:
- An outright rejection of their NDIS access request.
- An underfunded plan that does not meet their daily living needs.
- A specific support or assistive technology being denied.
- A home modification or Short-Term Accommodation (STA) decision.
- A capacity building or core supports allocation they believe is insufficient.
How Long Do You Have to Apply?
You have 3 months from the date you receive the written decision to request a Section 100 internal review. Miss this window and your options become significantly more limited — so act quickly.
5 Real Reasons Your NDIS Plan Was Rejected in South Australia
Understanding exactly why the NDIA rejected your plan is the first step to building a stronger case. These are the 5 most common reasons NDIS applications and plans get rejected across South Australia in 2026.
1. Weak or Missing Evidence
-In short: No OT report or functional impact assessment = near-certain rejection.
The NDIA relies entirely on documented evidence. Without it, your application fails — regardless of how genuine your needs are.
The most common evidence gaps:
- No functional impact assessment from an Occupational Therapist (OT).
- Medical reports that confirm a diagnosis but don’t describe daily living challenges.
- Outdated assessments that don’t reflect your current condition.
- GP letters that are too brief or too generalised.
How to fix it: Get a detailed OT report describing exactly what you cannot do independently, how often you need support, and what happens without it. The NDIA funds functional needs — not diagnoses.
2. Diagnosis Without Daily Impact Proof
-In short: The NDIA needs to know what you can’t do — not just what condition you have.
A confirmed diagnosis is not enough. The evidence of disability must demonstrate:
- Which daily living activities the participant cannot complete independently.
- How frequently support is required.
- The consequences of not receiving that support.
- How the disability affects mobility, communication, self-care, memory, or behaviour.
How to fix it: Write a detailed daily impact statement. Log a full week — personal care duration, meal preparation safety, how cognitive or behavioural challenges affect community participation.
3. Vague or Poorly Linked Goals
-In short: Vague goals = underfunded plans. Be specific or the planner can’t justify your support hours.
Examples of goals that lead to underfunded NDIS plans:
- “I want to improve my wellbeing” — too broad, no support link.
- “I want more independence” — no measurable outcome or timeframe.
- “I want to participate in the community” — no specified activity or assistance level.
How to fix it: Replace vague goals with specific, support-linked outcomes: “I want to prepare my own meals three times per week with support worker assistance, building toward full independence within 12 months.”
4. Supports Don’t Meet “Reasonable and Necessary” Criteria
-In short: Every support must pass the NDIS “reasonable and necessary” test — or it gets cut.
To meet the reasonable and necessary criteria, a support must be:
- Directly related to your disability.
- Effective and appropriate for your needs.
- Value for money compared to alternatives.
- Not the responsibility of another system (Medicare, housing, education).
Supports that frequently fail without proper framing:
- Gym memberships without a clinical therapy plan.
- Assistive technology not trialled or recommended by a therapist.
- Supports that overlap with general daily living costs.
How to fix it: Frame every support request explicitly against the reasonable and necessary criteria — your support coordinator can help write a justification statement for each item.
5. Wrong Support Category or Budget Line
-In short: Right support, wrong category = rejection. One misplaced item can sink the whole plan.
Common category errors:
- Short-Term Accommodation requested under Capacity Building instead of Core Supports.
- Therapy hours listed under Core Supports instead of Capacity Building.
- High-cost assistive technology requested without required prior trials.
How to fix it: Have a registered support coordinator review every line item before submitting — confirming it sits under Core Supports, Capacity Building, or Capital Supports correctly.
Key takeaway: Most NDIS rejections come down to evidence quality and goal specificity. Fix these two things and your chances of a successful review increase dramatically.
What the 2026 NDIS Planning Changes Mean for Your Case
If your plan was rejected or underfunded under the current NDIS planning framework, you may have a stronger case than you realise — because the rules are changing in your favour.
From mid-2026, the NDIS planning process will begin changing to make it fairer, more consistent, and easier for participants. This new approach is called new framework planning. The changes to the NDIS Act made in October 2024 enabled a new way of planning that focuses on a person’s disability support needs, rather than functional impairment alone. Nurse Aid Australia
Under the new framework, funding will be provided either as a stated item or as part of a flexible budget. Stated supports require specific use, while flexible budget funding allows broader NDIS support purchases. Plans will cover longer periods, providing participants with more certainty and fewer scheduled plan reviews. NDIS
What this means for South Australian participants right now:
- The rollout is staged — the NDIS has indicated the new approach will start with a small number of participants from mid-2026 and expand over time. Nurseaidaustralia Your current plan stays in place until you transition.
- New framework plans will implement greater budget flexibility and support needs assessments, and will be rolled out gradually. Imha
- Participants who are currently appealing a decision under the old framework can reference the new framework’s person-centred approach as supporting context in their review submission.
- In South Australia, strategic growth is focusing on northern suburbs like Mawson Lakes and Elizabeth, where demand for disability housing and support is highest RocketReach — making it more important than ever for SA participants to secure properly funded plans.
If the NDIA rejected your plan based on functional impairment criteria, the 2026 reform signals that the same evidence may be assessed very differently under the new framework. This strengthens your case for an internal review right now.
Ready to understand how the 2026 changes affect your specific plan? Nurse Aid Australia’s support coordinators in Adelaide are helping SA participants review their current plans against the new framework criteria — at no cost for your first conversation. Contact Nurse Aid Australia today.
How to Request a Section 100 Review in South Australia — 5 Steps
Step 1 — Check Your 3-Month Window
Confirm the date on the written decision letter from the NDIA. You must submit your Section 100 internal review request within 3 months of that date. If you are approaching the deadline, contact the NDIA immediately on 1800 800 110 to confirm your timeframe.
Step 2 — Gather New Supporting Evidence
New supporting evidence is the single most important part of your review request. Gather:
- An updated OT functional impact assessment.
- Specialist letters that describe daily living challenges specifically.
- A personal daily impact statement written by you or your carer.
- Any new medical reports or allied health assessments completed since the original decision.
- A support coordinator’s written justification for each requested support.
Step 3 — Complete the Review Request
Complete the NDIA’s official Request for a Review of a Decision form — available via the NDIS portal, by calling 1800 800 110, or by visiting your local NDIS partner office in Adelaide or Greater SA. In your written request:
- State the exact decision you are challenging.
- Explain clearly why the decision is wrong.
- Reference the reasonable and necessary criteria where relevant.
- Attach all supporting evidence as a single organised package.
Step 4 — Submit Your Request
Submit your Section 100 internal review request via one of the following:
- NDIS online portal — myplace participant portal.
- Email — enquiries@ndis.gov.au with all evidence attached.
- Phone — 1800 800 110.
- Post — Chief Executive Officer, National Disability Insurance Agency, GPO Box 700, Canberra ACT 2601.
- In person — any NDIS office or partner office in Adelaide Metro or Greater SA.
Step 5 — Follow Up Within 60 Days
The NDIA must complete your internal review within 60 days of receiving your request. If you have not received a written outcome by then, contact the NDIA to follow up. If the internal review outcome is still unsatisfactory, you have 28 days to escalate to the Administrative Review Tribunal (ART) for an external review.
SA-specific resources:
- Legal Services Commission SA — free legal advice for participants pursuing ART reviews: lsc.sa.gov.au .
- Disability Advocacy Finder — find NDIS Appeals-funded advocates in your area: disabilityadvocacyfinder.dss.gov.au .
- DACSSA — Disability Advocacy and Complaints Service of South Australia, based in Adelaide: dacssa.org.au .
Internal Review vs External Review — What's the Difference?
| Feature | Section 100 Internal Review | ART External Review |
| Timeframe to apply | 3 months from written decision | 28 days after internal review outcome |
| Cost | Free | Free (legal support via NDIS Appeals Program) |
| Who decides | Different NDIA officer | Independent ART tribunal member |
| Lawyer needed | No | Optional — funded via NDIS Appeals Program |
| Average timeframe | Up to 60 days | Varies — typically 3–6 months |
| New evidence accepted | Yes | Yes |
Frequently Asked Questions (FAQ)
NDIS plans are most commonly rejected because of insufficient evidence of disability, a failure to demonstrate how the condition affects daily living activities, vague or unlinked goals, supports that don’t meet the reasonable and necessary criteria, or items submitted under the wrong budget category. Understanding the specific reason in your decision letter is the critical first step before requesting a review.
You have 3 months from the date you receive the written decision to request a Section 100 internal review. If your internal review is unsuccessful, you then have 28 days from that outcome to apply to the Administrative Review Tribunal (ART) for an external review. Missing either deadline significantly limits your options.
Yes. The Section 100 internal review process is completely free. You do not need a lawyer, and there are no fees involved. In South Australia, the Legal Services Commission SA can provide free legal advice if your case proceeds to an ART external review.
Yes. An underfunded plan is a reviewable decision under the NDIS Act — just like an outright rejection. If your plan does not provide enough funding to meet your daily living needs, you can request a Section 100 internal review to have the funding amount reassessed. Many South Australian participants successfully increase their funding through this process.
If you disagree with the Section 100 internal review outcome, you have 28 days to apply to the Administrative Review Tribunal (ART) for an independent external review. The NDIS Appeals Program can connect you with a free disability advocate and, in some cases, legal representation for your ART hearing. In South Australia, the Legal Services Commission SA also provides support for eligible participants.
Yes. Nurse Aid Australia’s support coordinators work with NDIS participants across Adelaide, Mawson Lakes, Elizabeth, and Marion to review existing plans, identify underfunding, gather evidence, and prepare review submissions. Local disability advocates are also available through DACSSA and the NDIS Appeals Program. You do not have to go through this process alone.
For a successful NDIS internal review, you need an updated OT functional impact assessment, specialist medical reports describing daily living challenges specifically, a personal daily impact statement written by you or your carer, any new allied health assessments completed since the original decision, and a written justification from your support coordinator for each requested support. New supporting evidence is the single most powerful element of any review submission.
From mid-2026, the NDIS planning process will begin changing to make it fairer, more consistent, and easier for participants through a new approach called new framework planning. Nurse Aid Australia Under the new framework plans, participants still have the right to request an internal review and an external review through the Administrative Review Tribunal. If your plan was rejected under the current framework, the new person-centred assessment approach may strengthen your case — making it worth requesting a review now rather than waiting.
To request a Section 100 internal review in South Australia: check you are within the 3-month window, gather new supporting evidence including an OT report, complete the NDIA Request for a Review of a Decision form, and submit via the NDIS portal, by emailing enquiries@ndis.gov.au , calling 1800 800 110, or visiting an Adelaide Metro NDIS partner office. The NDIA must respond within 60 days of receiving your request.
NDIS internal reviews have a success rate of approximately 40–50%, making them a genuinely worthwhile process for participants who have been rejected or underfunded. The strongest predictor of success is the quality of new supporting evidence submitted — particularly a detailed OT functional impact assessment. South Australian participants who work with a support coordinator to prepare their submission consistently achieve better outcomes than those who submit without professional guidance.
You Don't Have to Fight This Alone
Navigating the NDIS review process is stressful, time-sensitive, and — without the right support — easy to get wrong. The 3-month window moves fast. The evidence requirements are specific. And the difference between a successful review and another rejection often comes down to how well your submission is prepared.
At Nurse Aid Australia, we have been supporting NDIS participants and their families across South Australia for over 25 years. Our Adelaide-based support coordinators understand exactly what the NDIA looks for — and exactly how to build a submission that gets results.
We can help you:
- Review your current plan and identify where it has been underfunded.
- Connect you with allied health professionals for updated OT and functional impact reports.
- Prepare and organise your Section 100 review submission.
- Link you with local SA disability advocates and Legal Services Commission SA if needed.
- Guide you through the 2026 new framework planning transition.
Your first conversation with our team is free.
📞 Contact Nurse Aid Australia today — Adelaide’s trusted registered NDIS provider since 1999.