What do OOA and OSS mean?
Two similar acronyms can describe very different costs in an NDIS housing arrangement. Understanding who receives each payment helps you check your plan, housing agreement and support agreement before moving into an SDA property.
Onsite overnight assistance (OOA) refers to space within or near an SDA dwelling where support workers can provide overnight assistance. The OOA SDA payment is linked to the property and paid to the registered SDA provider when the dwelling and enrolment meet NDIS requirements.
Onsite shared support (OSS) generally describes support workers shared by residents, often within an apartment complex or grouped SDA development. OSS may provide scheduled assistance, overnight response or help during agreed hours. Unlike OOA, it pays for support delivery rather than the physical room used by workers.
The phrase OSS SDA can therefore be misleading. OSS is usually a support arrangement connected with an SDA home, not a separate SDA property payment.
How do the payments differ?
The easiest way to separate these terms is to ask what each payment buys. OOA contributes to the cost of providing support worker space, while OSS pays for workers who deliver assistance.
| Question | OOA | OSS |
|---|---|---|
| What does it fund? | Eligible space for overnight assistance | Shared support worker time |
| Who receives it? | Registered SDA provider | Support service provider |
| Funding type | SDA property payment | Participant support funding |
| Does it pay wages? | No | Yes |
The main SDA payment components can include the base SDA price, location factor, fire sprinkler allowance where applicable, and an OOA amount. The final price depends on the property’s design category, building type, location and enrolment details.
OOA does not automatically apply because a worker sleeps at the property. The dwelling must meet the relevant requirements and be enrolled correctly. You can read more about how SDA payments work and how prices change through annual SDA indexation.
How should these costs appear in your plan and agreements?
Your NDIS SDA funding pays the SDA provider for the eligible dwelling. You may also pay a Reasonable Rent Contribution under your tenancy or accommodation agreement. Electricity, water, gas and internet remain your responsibility, while the provider is responsible for building insurance and property maintenance.
OSS should be recorded separately. It may be funded through Core Supports, including a supported independent living arrangement, depending on your approved plan and support needs. The support provider then claims for the assistance delivered under your service agreement.
Check that your documents clearly identify:
- the SDA provider receiving the property payment
- the support provider delivering OSS
- the hours and type of shared support available
- how costs are divided between residents
- what happens when support needs change
SDA and support services have different purposes, even when they operate at the same address. Our article on SDA and SIL funding explains this separation in more detail.
What should you check before choosing a Perth SDA home?
Ask for written details about both arrangements before signing. This is particularly useful in Perth apartment developments where several residents may share an onsite support team while living in separate SDA apartments.
Questions to ask include:
- Is the dwelling enrolled with an OOA component?
- Where is the OOA space located?
- Who provides the onsite shared support?
- Is OSS available overnight, during set hours or at all times?
- How quickly should staff respond when assistance is requested?
- What support costs will be claimed from your NDIS plan?
- Can you choose a different support provider?
Do not assume that an OOA room guarantees a particular staffing level. The room and the support roster are funded through different arrangements, so both must be checked.
Take your support coordinator, occupational therapist or trusted family member to property inspections where possible. Use these questions for touring Perth SDA housing to compare properties and service arrangements consistently.
Summary
OOA pays the SDA provider for eligible onsite overnight assistance space. OSS pays a support provider for shared assistance delivered to residents. Keeping these costs separate helps you understand what your NDIS plan funds and which provider is responsible for each service.
If you need help comparing OOA and OSS arrangements in a Perth SDA property, contact the Innogreen team to discuss your housing and support requirements.