NDIS Terms Explained: A Jargon-Free Glossary
NDIS terms explained in plain English: plans, funding, providers, reviews and the 2026-27 reforms - a jargon-free glossary for participants and carers.
Start with the big five words
Who's who: the people and organisations
The parts of your plan (and what's changing)
How your money is managed
'Reasonable and necessary' and other funding words
Provider words: registered, unregistered, support worker
Getting in and staying in: access and eligibility words
Reviews, reassessments and appeals
New words from the 2026-27 reforms
Quick acronym cheat sheet
What to do next
Frequently asked questions
What's the difference between the NDIS and the NDIA?
The NDIS is the scheme - the whole system that funds disability supports. The NDIA is the agency, the government body that runs the scheme, approves access and makes decisions about your plan. In everyday conversation people use the two words as if they mean the same thing, and that is usually fine.
What does 'reasonable and necessary' actually mean for my supports?
It is the test the NDIA uses to decide whether to fund something. Broadly, the support must be related to your disability, likely to help, good value for money, and not something another system like health or education should provide. It describes how decisions are made in general - it is not a promise about any specific support, so ask your planner how it applies to your situation.
Do I have to use a registered provider?
It depends on how your plan is managed. If you are agency-managed, yes - the NDIA only pays registered providers. If you are plan-managed or self-managed, you can use both registered and unregistered providers. Registration is about Commission oversight, not a guarantee of quality, so check references and service agreements either way.
Some of these reform dates are in the future - are they definite?
Not entirely. Many of the changes depend on the 'Securing the NDIS for Future Generations' Bill 2026 and are rolling out in stages. The dates have already shifted once. Treat the dates here as the current plan, distinguish what has commenced from what is proposed, and always confirm the latest timing with the NDIA before making decisions.
What is a 'plan reassessment' and is it the same as an appeal?
No. A plan reassessment is the routine fresh look at your plan when it renews - your goals and funding are reconsidered. An appeal is when you disagree with a decision: you first ask the NDIA for an internal review (usually within three months), and if still unhappy you can go to the Administrative Review Tribunal. An advocate can help with either.