SIL, SDA and MTA: What's the Difference?

The NDIS uses short labels for very different things. SIL, SDA and MTA all relate to where a person lives and how they are supported, but they do not fund the same need. Mixing them up leads to the wrong evidence, the wrong funding request and avoidable delays.

Here is the heart of it:

The right home and the right support are related, but they are not the same thing.

SIL is about support. SDA is about housing. MTA is about temporary accommodation.

SIL: Supported Independent Living

SIL funds support workers who help with daily tasks at home, such as personal care, meals, medication, household tasks and overnight support. It is for people who need regular help throughout the day, overnight, or both.

SIL does not pay for the house itself. Rent, board and utilities are separate. It also does not have to mean a group home. The funding should reflect the person's actual support needs, not the type of property they live in.

SDA: Specialist Disability Accommodation

SDA funds the physical home itself, designed for people with extreme functional impairment or very high support needs. Think wider doorways, step-free access, hoist-ready ceilings, accessible bathrooms and kitchens.

SDA is not support worker funding, and not every accessible home qualifies. It is a specific category with strict eligibility, usually backed by evidence from occupational therapists and other professionals. SDA is paid to the housing provider, and the participant still pays reasonable rent and living costs.

SDA is about the design and features of the home itself.

MTA: Medium Term Accommodation

MTA funds a temporary place to stay, generally up to 90 days, when someone cannot move into their long-term home yet. Common examples: waiting for home modifications, leaving hospital, or waiting for an SDA vacancy.

MTA is not a long-term home, respite or a holiday. It also does not cover daily supports or living expenses. Those come from other parts of the plan.

MTA can support a temporary stay while a long-term home is being arranged.

At a glance

Term	What it funds	What it does not fund
SIL	Support workers for daily living	Rent, property costs, building features
SDA	A specialist disability dwelling	Support workers, personal expenses
MTA	Temporary accommodation	Long-term housing, respite, daily supports

A person can have SIL without SDA, SDA without SIL, both, or neither. Someone might use MTA while waiting for an SDA property, or receive SIL in an ordinary rental.

Questions to ask before making a request

Before asking for SIL, SDA or MTA, it helps to write down the need in plain language.

Start with these questions:

• What is unsafe, unsuitable or unsustainable right now?

• Is the main issue the person's support needs, the physical home, or a temporary housing gap?

• What has already been tried?

• What evidence exists?

• What does the person want their living situation to look like?

• Is the need short-term or ongoing?

• What informal supports are available, if any?

• What risks increase if nothing changes?

  
  

Then match the request to the need.

For SIL, focus on daily routines, support hours, overnight needs, risks and skill building.

For SDA, focus on why ordinary housing or modifications are not enough, and what specialist design features are required.

For MTA, focus on the temporary barrier, the intended long-term housing outcome and the timeframe.

The biggest mistake is treating housing and support as one thing

Housing and support are closely linked, but they are not the same. A good home can make support safer and more effective. Good support can help a person build independence in their home. But each part must still be planned properly.

When SIL, SDA and MTA are confused, people can end up with:

• Support funding but no suitable place to live

• A suitable property but not enough daily support

• Temporary accommodation with no clear exit plan

• Evidence that does not answer the NDIS decision

• Less choice over who provides support

• Delays during urgent transitions

The better approach is to separate the problem into parts. Ask, "Does this person need support, specialist housing, temporary accommodation, or a combination?"

That question makes the next step clearer, helps people ask for the right funding, and builds a living arrangement that works beyond the paperwork.

Clear planning helps separate housing needs from support needs.