NDIS Service Agreement: What to Include and Common Mistakes

An NDIS service agreement is a signed agreement between a participant and a provider that sets out the supports being delivered, what they cost, and the responsibilities of each party. A good agreement covers four things the NDIS itself points to: what supports are being provided, their cost, each party's responsibilities, and what to do when you disagree. Get those right — in plain language, aligned to the participant's plan — and you have a document that protects everyone and stands up at audit.

One point surprises many new providers: a written service agreement is not legally required in most cases. The NDIS recommends creating one whenever you start with a new participant, but the only support type where a written agreement is mandatory is Specialist Disability Accommodation (SDA). Even so, 'not mandatory' is not 'skip it' — for registered providers, a clear agreement is how you demonstrate compliance with the NDIS Practice Standards, and it is one of the first documents an auditor asks to see. This guide covers what to include, when a written agreement is required, and the common mistakes that turn a helpful document into a liability.

What is an NDIS service agreement?

A service agreement is a signed agreement between a participant and their provider that describes what the two parties have agreed about the participant's NDIS supports. The NDIS is explicit that they exist to protect the participant: they create a shared understanding of the supports being delivered, the responsibilities on both sides, and what happens if something goes wrong. The agreement can also record the participant's written consent to begin working together.

Think of it as the operating manual for the relationship. If a provider later does something the participant did not agree to — charging more than was set out, say — the participant can point to the agreement and, if it is not resolved, complain to the NDIS Quality and Safeguards Commission. A well-written agreement prevents most disputes by making expectations explicit from day one.

Is a service agreement mandatory?

In most cases, you are not required to have a written service agreement. The single exception is Specialist Disability Accommodation, where a written residency or service agreement is mandatory under the NDIS rules. For every other support type, a written agreement is strongly recommended but not legally compulsory to sign.

For providers, though, the picture is different. Registered providers assessed against the NDIS Practice Standards Core Module must show that each participant has a clear understanding of the supports they have chosen and how those supports will be provided. That understanding is almost always evidenced by a service agreement. It does not strictly have to be a written document to satisfy the standard, but a signed written agreement is the easiest and safest way to prove it — which is why 'optional' agreements are, for a registered provider, effectively standard practice.

What to include in an NDIS service agreement

Build your agreement around the four essentials the NDIS names — supports, cost, responsibilities and disagreements — then add the practical detail that prevents confusion. A complete agreement should include:

• Participant and provider details — names, contact details, and the provider's NDIS registration number if registered.
• Start and end dates — usually tied to the participant's current plan.
• The supports being provided — an itemised schedule of supports linked to the participant's plan goals.
• The cost of the supports — hourly or unit rates aligned with the NDIS Pricing Arrangements and Price Limits.
• How, when and where supports are delivered — locations, frequency and any conditions.
• Payment and invoicing terms — who is invoiced and the timeframe, which depends on how the plan is managed.
• A cancellation policy — your short-notice rules, consistent with the NDIS Pricing Arrangements.
• How to make changes — how either party proposes and agrees variations.
• How to end the agreement — the notice period and process for both sides.
• What to do when you disagree — complaints and dispute-resolution steps, including the NDIS Commission.
• Consent and privacy — the participant's written consent and how their information is handled.

The schedule of supports

The schedule of supports is the heart of the agreement. It lists the specific supports, the days and times they are delivered, the hourly or unit rates, and where the support takes place. Keeping it as a clearly linked section lets you update it when a participant's needs change without rewriting the whole agreement. Every line should trace back to a goal or funded support in the participant's NDIS plan — supports that are not reasonable and necessary in the plan should not appear here.

Costs, payment and how the plan is managed

How a participant's funding is managed changes what you can charge and how you get paid, so the agreement must reflect it. There are three options:

• Self-managed — the participant or their nominee pays you directly and keeps the records. They can agree to rates outside the standard price limits, so spell any such arrangement out clearly.
• Plan-managed — a registered plan manager pays your invoices and keeps the records. Claims must sit within the NDIS Pricing Arrangements and Price Limits.
• NDIA-managed (agency-managed) — the NDIA pays registered providers directly, only registered providers can be used, and pricing is bound by the price limits.

State the rates plainly, confirm they sit within the price limits where those apply, and set out invoicing timeframes. Because eligible NDIS supports are generally GST-free when a written agreement is in place, a clear service agreement also helps evidence that GST-free treatment.

Cancellation policy

Ambiguous cancellation terms are a leading source of billing disputes. Set out your short-notice cancellation policy in line with the NDIS Pricing Arrangements and Price Limits — how much notice you ask for and when a cancellation can be charged. Being upfront protects your revenue and stops a participant being blindsided by a charge they did not expect.

Changes, ending the agreement and disputes

Your agreement should say how either party proposes a change, how much notice is needed to end it, and what a participant does if they are unhappy — spell out your internal complaints process and make clear they can also contact the NDIS Quality and Safeguards Commission. Our guide to building an NDIS complaints management procedure covers how to structure that pathway.

Service agreements and the NDIS Practice Standards

For registered providers, the service agreement is not just paperwork — it is evidence against the NDIS Practice Standards. The Core Module is organised into four divisions: S1 Rights and Responsibilities, S2 Governance and Operational Management, S3 Provision of Supports, and S4 Support Provision Environment. These are structural divisions of the standards, not incident-severity ratings.

Service agreements speak most directly to two of them. Under S1 Rights and Responsibilities, they evidence informed consent, choice and control, and transparent pricing. Under S3 Provision of Supports, they show that supports are planned and agreed so the participant clearly understands what they will receive. A missing, vague or out-of-date agreement is a common non-conformance finding, because it undercuts the provider's ability to demonstrate either standard. For a deeper look at the first division, see our guide to NDIS Practice Standard S1: Rights and Responsibilities.

How to write an NDIS service agreement

A workable process for producing an agreement that is both participant-friendly and audit-ready:

1. 1Start from the participant's plan — identify the funded, reasonable and necessary supports you will actually deliver.
2. 2Draft the schedule of supports — list each support with its frequency, times, location and rate.
3. 3Confirm pricing against the management type — check rates sit within the price limits for plan- and agency-managed participants, and document any agreed self-managed rates.
4. 4Add the core terms — responsibilities, cancellation policy, how to make changes and end the agreement, and the complaints pathway.
5. 5Write it in plain language — offer an Easy Read or translated version where needed so consent is genuinely informed.
6. 6Sign, date and share a copy — capture the participant's written consent and give them their own copy.
7. 7Review it when the plan changes — update the schedule and re-sign whenever the plan is reassessed.

Common NDIS service agreement mistakes to avoid

Most service agreement problems are the same avoidable errors turning up again and again. Watch for these:

• Using a generic template unchanged. A template that is never tailored to the participant's actual plan and goals reads as boilerplate and fails to evidence informed choice.
• A vague or missing schedule of supports. Without clear frequencies, times and rates, both billing and audit evidence fall apart.
• Charging plan- or agency-managed participants above the price limits. Only self-managed participants can agree to rates outside the price limits.
• No clear cancellation policy. Undefined short-notice terms are a leading cause of billing disputes.
• Not written in accessible language. If the participant cannot genuinely understand the agreement, consent is not truly informed — offer Easy Read or translated versions.
• Never updating it. An agreement tied to a plan that has since been reassessed no longer reflects the supports being delivered.
• Forgetting SDA is different. Specialist Disability Accommodation requires a written agreement and has its own tenancy and residency considerations.
• No signature or stored copy. An unsigned agreement, or one you cannot produce on request, is an audit evidence gap.

Because the agreement is a core piece of audit evidence, treat it with the same rigour as any other compliance record. Our NDIS audit evidence guide explains how it fits alongside the other documents an auditor expects for each Practice Standard.

Frequently asked questions

Is an NDIS service agreement legally required?

Not in most cases. The NDIS recommends a written service agreement whenever you start with a new participant, but it is only legally mandatory for Specialist Disability Accommodation supports. For registered providers, though, a service agreement is the standard way to evidence compliance with the Practice Standards, so it is effectively expected.

What should be included in an NDIS service agreement?

At minimum: participant and provider details, the supports being provided (a schedule of supports linked to the plan), the cost of those supports, payment terms, a cancellation policy, how to make changes, how to end the agreement, and what to do when you disagree — including that the participant can contact the NDIS Quality and Safeguards Commission.

Can a provider charge more than the NDIS price limits?

Only when a participant is self-managed and agrees to it. Plan-managed and NDIA-managed (agency-managed) participants are bound by the NDIS Pricing Arrangements and Price Limits, so your rates for them must sit within those limits. Any agreed self-managed rate should be stated clearly in the agreement.

Do I need a new service agreement when a plan is reassessed?

You should review and update the agreement whenever the participant's plan is reassessed or the supports materially change. Update the schedule of supports so it matches the current plan, and re-sign so the agreement keeps reflecting what is actually being delivered.

Who signs an NDIS service agreement?

The participant signs, or a nominee or authorised representative signs on their behalf where appropriate, alongside the provider. The signature records the participant's informed consent, so make sure they understand the terms before they sign.

The bottom line

An NDIS service agreement is a signed, plain-language agreement that sets out the supports, the costs, each party's responsibilities and what to do when things go wrong. A written agreement is only mandatory for Specialist Disability Accommodation, but for any registered provider it is the clearest way to evidence informed consent under S1 and agreed support planning under S3.

So build it properly: a specific schedule of supports tied to the plan, pricing that respects the participant's management type, a clear cancellation policy, and an honest dispute pathway. Avoid the recurring mistakes — generic templates, vague schedules, over-charging managed participants, and agreements that never get updated — and the document does its job on both sides. AuditCore then keeps every agreement mapped to the Practice Standards it needs to satisfy, so your evidence is ready before the auditor arrives.