SIL staffing ratios for NDIS SIL providers (2026 guide)

What NDIS practice standards actually say about SIL staffing

One of the most common misconceptions among SIL providers is that the NDIS Commission publishes a fixed national staffing ratio — a single number like "one worker to three participants" that applies universally. This is not how the framework operates. The NDIS Practice Standards, which all registered SIL providers must comply with, take a needs-based, individualised approach to staffing.

Under the Practice Standards, providers are required to ensure that the supports they deliver are safe, of adequate quality, and responsive to each participant's goals, needs, and risk profile. Staffing levels in SIL settings must be sufficient to deliver the support commitments documented in each participant's NDIS plan and SIL roster of care. There is no single published ratio; there is a process that must be followed to determine and justify the right ratio for each home.

How SIL staffing ratios are actually determined

Rather than consulting a government table of ratios, registered SIL providers must work through a structured process when setting and justifying staffing levels. The following steps reflect the intent of the NDIS Practice Standards and the assessment processes that flow from them.

1. Review each participant's NDIS plan and support budget. The funded support hours in each participant's approved plan are the starting point. Staffing must be aligned to what the NDIS has agreed to fund, which itself is based on a functional assessment of need.
2. Conduct or review a SIL assessment or quote. When a new participant enters a SIL arrangement, a formal SIL assessment and rostering quote is prepared (usually using the NDIS SIL costing tool or equivalent). This document itemises shift types, overnight support, active and sleepover arrangements, and the total funded hours per week. Ratios emerge directly from this documentation.
3. Assess support needs and risk across all residents in the home. In a shared SIL home, the aggregate support needs of all residents must be considered together. A home with participants who have complex behaviours of concern, high personal care needs, or require two-person transfers will require a higher staffing ratio than a home where participants are largely independent overnight.
4. Document your rationale explicitly. The NDIS Practice Standards require providers to maintain records that demonstrate how staffing decisions are made. Auditors from an NDIS-approved quality auditor will look for written evidence that ratio decisions are individualised, risk-informed, and reviewed regularly.
5. Align your roster to the documented ratio. Your actual rostered hours must match the commitments made in the SIL roster of care submitted to the NDIS. Underfunding shifts or rostering below the agreed level is a Practice Standards non-conformance and can constitute a breach of the provider's obligations under the NDIS Act 2013.
6. Review ratios when participant needs change. The Practice Standards require providers to review support arrangements when there is a material change in a participant's circumstances — including health events, changes to behaviour support plans, or transitions between living arrangements. Staffing ratios must be updated accordingly.

The 2026 strengthened framework: what is changing for SIL providers

The NDIS Commission's strengthened NDIS Practice Standards, introduced as part of broader NDIS reforms, place heightened obligations on SIL providers in several areas directly relevant to staffing.

Mandatory registration for all SIL providers

As of the 2026 registration changes under the NDIS Amendment (Getting the NDIS Back on Track No. 1) Act 2024, all providers delivering SIL must be registered with the NDIS Commission. This applies regardless of participant self-management status. Previously, unregistered providers could deliver SIL to self-managed participants. That exemption is removed. Registration requires demonstrating compliance with the NDIS Practice Standards, which includes staffing governance.

Strengthened worker screening and qualifications

The strengthened framework places greater emphasis on worker qualifications, training, and screening. All workers delivering SIL must hold a current NDIS Worker Screening Check. Providers must also demonstrate that workers have the skills and training commensurate with the support needs of the participants they serve. Where participants have complex needs — including those with challenging behaviours, medically complex conditions, or restrictive practice authorisations — providers must show that workers have appropriate competencies, which in turn influences minimum staffing levels.

Incident management and after-hours coverage

The strengthened standards reinforce requirements around incident management. Staffing ratios must account for the provider's ability to respond to incidents at all hours. If a SIL home operates on a sleepover model rather than active overnight staffing, providers must demonstrate how they will respond to incidents during sleepover periods and what escalation procedures are in place. Auditors are paying close attention to the gap between documented procedures and actual capacity to respond.

Key risk factors that drive higher staffing ratios

While the NDIS Commission does not mandate specific ratios, the following participant and home-level factors consistently require providers to justify and maintain higher staffing levels:

• Behaviours of concern requiring behaviour support plans and restrictive practice authorisations — particularly where PBS (positive behaviour support) strategies require immediate and consistent two-staff responses.
• Complex medical support needs such as PEG feeding, seizure management, or ventilator support, which may require trained workers on shift at all times.
• Two-person manual handling requirements, which structurally require a minimum of two workers on shift regardless of participant-to-worker ratios elsewhere.
• Overnight active support requirements where participants cannot safely be left with a sleeping worker — common for participants with epilepsy, aspiration risk, or very high support needs.
• Mixed household dynamics where one resident's behaviours create safety risks for other residents, requiring dedicated supervision rather than shared oversight.

What a quality auditor checks during a SIL staffing audit

When an NDIS-approved quality auditor reviews a SIL provider's staffing practices, they typically examine the following:

• Whether the roster of care for each participant matches the funded hours in their NDIS plan.
• Whether the provider has documented a rationale for the staffing ratio used in each home.
• Whether shift records demonstrate that actual staffing delivered matches what was rostered and funded.
• Whether all workers hold current NDIS Worker Screening clearances.
• Whether behaviour support plans, restrictive practice authorisations, and related staffing instructions are embedded in shift handover documentation.
• Whether the provider has a process for reviewing and adjusting staffing when participant needs change.

Common non-conformances identified in SIL audits include: insufficient documentation of ratio rationale; rostering gaps that leave participants with lower staff coverage than their plan specifies; and workers delivering supports they are not trained for, particularly in relation to restrictive practice and behaviour support implementation.

Practical steps to strengthen your staffing compliance now

1. Audit each SIL home's current roster against the funded support hours in each resident's active NDIS plan. Identify any gaps.
2. Ensure every home has a current, signed roster of care that reflects actual staffing arrangements, not just planned ones.
3. Document in writing the rationale for the staffing ratio in each home, referencing participant-specific needs assessments.
4. Check that all workers hold current NDIS Worker Screening clearances and that competency records align with the support tasks they are performing.
5. Review your incident management procedure to confirm after-hours staffing coverage is explicitly addressed.
6. Schedule staffing ratio reviews into your governance calendar — at minimum annually, or upon any material change in participant circumstances.

Template: staffing ratio rationale statement

The following is an example of the type of written rationale a SIL provider should hold on file for each home. This is not a government template — it illustrates the content a quality auditor expects to find.

If you are working toward registration or re-registration in 2026 and need audit-ready documentation, ndiscompliant.com.au offers a 74-document SIL compliance kit that includes staffing ratio rationale templates, roster of care frameworks, and the full suite of policies auditors expect to see.

Summary

SIL staffing ratios in 2026 are not determined by a single national rule but by a documented, individualised process anchored in each participant's funded plan, support needs, and risk profile. The NDIS Practice Standards require providers to justify their ratios in writing, align actual rostering to those ratios, and review them regularly. With mandatory registration now extending to all SIL providers, demonstrating robust staffing governance is no longer optional — it is a condition of continuing to operate.