Running an NDIS business is not like running a café or a trades company. Your prices are capped by a government pricing schedule, your GST treatment depends on paperwork most accountants have never seen, your biggest cost line is governed by one of the most complex awards in Australia, and — if you are a registered provider — an auditor will eventually ask to see how it all fits together. A generalist accountant who treats an NDIS provider like any other small business will usually get the GST wrong, miss the audit requirements, and have no idea whether you are actually making money per support hour.

Trinity Accounting Practice has worked with disability and community-sector organisations for years, including deep Virtual CFO experience with not-for-profits — the sector the NDIS grew out of. This page explains what NDIS-specific accounting actually involves, and what to look for in an NDIS accountant in Sydney.

Registered vs unregistered providers — two different compliance loads

The first question we ask any NDIS business is: registered or unregistered? The answer changes almost everything about your compliance burden.

Registered providers are approved by the NDIS Quality and Safeguards Commission. They can serve NDIA-managed (agency-managed) participants, but they must comply with the NDIS Practice Standards, maintain a quality management system, and undergo independent audits — a verification audit for lower-risk supports, or a full certification audit for higher-risk supports. Audit costs can run from a few thousand dollars to well over $10,000 depending on scope, and they recur on a roughly three-year cycle with mid-term checks.
Unregistered providers can only serve plan-managed and self-managed participants. The formal audit burden is lighter, but the tax, award and pricing obligations are exactly the same — and the ATO does not distinguish between the two.

Many Sydney providers start unregistered, build a participant base, then register to access agency-managed participants. That transition has accounting consequences: audit preparation, financial viability assessments, and systems that can produce the records an auditor will request.

GST on NDIS supports — generally GST-free, but only if the paperwork holds

This is the area where we see the most errors. Supports supplied to an NDIS participant are generally GST-free under section 38-38 of the GST Act — but only when all of the following are satisfied:

The participant has an NDIS plan in effect;
The supply is of reasonable and necessary supports specified in the statement of supports in that plan;
There is a written agreement between you and the participant (or someone acting on their behalf, such as a plan manager) identifying the participant and stating the supply is of supports under their plan; and
The supply is of a kind covered by the GST-free Supply (NDIS Supports) Determination.

Miss the written agreement — a service agreement, or even a combination of letters and invoices can qualify — and the supply may not be GST-free, meaning you could owe 1/11th of every invoice to the ATO. We have reviewed providers carrying six-figure GST exposure purely because service agreements were never signed. Conversely, providers who charge GST on supports that should be GST-free quietly hand the ATO money they could keep, or price themselves above the cap. Supports delivered beyond what the plan specifies (extra hours, items not in the plan) also generally lose the GST-free treatment.

Pricing arrangements, price limits and what they do to your margin

The NDIS Pricing Arrangements and Price Limits (the document formerly known as the Price Guide) caps what you can charge for most supports. The cap is your ceiling — your costs are not capped to match. That makes margin management an exercise in cost control rather than pricing power:

Charging above the price limit for agency-managed or plan-managed participants is a compliance breach and a common trigger for payment integrity reviews and clawbacks.
Annual pricing updates (typically from 1 July) can move your revenue line overnight — sometimes down in real terms once wage increases under the award are factored in.
Claiming rules around travel, non-face-to-face time, cancellations and group supports are detailed, and under-claiming legitimate items is as common as over-claiming.

Payroll and the SCHADS award — your biggest cost and biggest risk

Most NDIS support workers are covered by the Social, Community, Home Care and Disability Services Industry Award (SCHADS). It is widely regarded as one of the hardest awards in Australia to administer: classification levels and pay points, broken shifts and minimum engagement periods, sleepover and 24-hour care rates, travel time between participants, and penalty rates that stack in non-obvious ways. Add the 12% superannuation guarantee, workers compensation, portable long service leave in some settings, leave loading and the cost of non-billable time, and the true cost of an employee is typically 1.3 to 1.5 times their base hourly rate.

Underpayment claims in the disability sector are increasingly common, and back-pay liabilities compound quickly across a roster. An NDIS accountant should be checking that your charge rates actually cover SCHADS-loaded labour costs — not just that the payroll software ran.

Plan managers — trust accounting obligations on top of everything else

If your business provides plan management, you hold and disburse participants’ NDIS funds. That money is not yours. Plan managers need clean separation between participant funds and operating funds, reconciliation of claims against the NDIA portal, prompt payment of provider invoices, and records that survive both a Commission audit and a participant dispute. Treating the plan-management float as working capital is the fastest way to destroy a plan-management business — and it shows up the moment anyone reconciles properly.

Worked example — profitability per support hour

A Beverly Hills support coordination and core-supports provider bills a support worker out at the price limit of roughly $67 per weekday hour. The owner believed the business made “about $25 an hour” per worker. We rebuilt the numbers per billable hour:

Base wage (SCHADS level 2.3): about $34 per hour
Super (12%), workers comp, leave loadings and entitlements: about $9
Non-billable time — travel, training, supervision, cancellations at roughly 15% utilisation loss: about $7
Overhead per billable hour — insurance, software, rostering, admin, vehicle: about $9

True cost: about $59 per billable hour, leaving roughly $8 — not $25 — before the owner paid themselves. Weekend shifts, where penalty rates rose faster than the corresponding price limits, were actually losing money. The fix was a roster redesign, tighter cancellation management and shifting the service mix toward supports with better margin. Within two quarters the blended margin per hour had roughly doubled. None of that is visible in a standard profit and loss statement; it only appears when someone builds the per-hour model.

A Trinity insight from 22 years in practice

The NDIS sector grew out of the not-for-profit world, and it still behaves like it: capped prices, acquittal-style scrutiny, award-heavy workforces and funders who can claw money back. Accountants who have only ever served commercial SMEs tend to misread all of it — they look for pricing power that does not exist and miss the compliance triggers that do. Our years running Virtual CFO services for not-for-profits taught us to manage organisations where the revenue side is fixed and the only levers are cost, utilisation and mix. That is precisely the skill set an NDIS provider needs, and it is why NFP-experienced accountants consistently do better work in this sector.

What this means for you

If you cannot produce a signed service agreement for every participant: your GST-free position may be exposed. Fix the paperwork before the ATO asks.
If you are charging GST on supports delivered under a plan: you may be needlessly inflating prices or short-changing yourself. Get the treatment reviewed.
If you do not know your true cost per billable support hour: you do not know whether you are profitable. Build the model.
If you are a plan manager mixing participant funds with operating cash: separate them now, before an audit or dispute forces the issue.
If you are preparing for registration or a certification audit: your financial records and viability evidence are part of the assessment. Start months early, not weeks.
If SCHADS classifications were set up once and never reviewed: underpayment risk grows every pay run.

How Trinity can help

Trinity Accounting Practice supports NDIS providers across Sydney from our Beverly Hills office — registered and unregistered, sole-trader support workers through to multi-site organisations. We handle GST treatment and BAS, Xero-based bookkeeping configured for NDIS claiming, SCHADS-aware payroll, plan-manager trust account structures, audit-ready financial reporting and per-hour profitability modelling, with Virtual CFO support for providers ready to scale. Our long not-for-profit CFO background means we already speak the sector’s language.

Book an NDIS accounting review with the Trinity team →

General advice only. This article contains general information current as at June 2026 and does not constitute tax, financial or legal advice. It does not take into account your personal circumstances, objectives or needs. Before acting on any information in this article, you should consider its appropriateness to your situation and seek professional advice from Trinity Accounting Practice or another qualified adviser. Liability limited by a scheme approved under Professional Standards Legislation.