Most SIL providers aren’t losing money because their rates are wrong. They’re losing it because of 3 operational gaps that are invisible until someone points them out.
Some of the most dedicated providers I’ve ever met are running SIL homes that are quietly losing money every single month.
The participants are well supported. The staff are committed. The service is genuinely good.
But the numbers don’t work. And nobody can figure out why.
I’ve sat inside rosters that looked fine on paper and were bleeding money in practice. I’ve watched providers take on a SIL home with real excitement, run it well for 12 months, and walk away 2 years later because the margins never came.
The problem wasn’t the care. It was never the care.
It was 3 specific operational gaps that compound, week after week, until the home that was supposed to generate recurring revenue becomes the thing keeping the whole business from growing.
This is what those gaps are. Where they come from. What they cost. And what to do about them.
SIL is appealing for a clear reason. It’s recurring revenue. Once a participant is placed and the roster is running, you have a relatively predictable income stream. And because SIL funds intensive, around the clock support for people with high needs, the per-participant funding amounts are substantial.
A single SIL participant in a shared arrangement might carry $80,000 to $150,000 in annual SIL funding depending on their support needs. For 3 participants in one home, you’re looking at a shared pool of $250,000 to $400,000 or more per year.
That’s a compelling number.
And it holds up, if you run the model correctly.
The issue is that SIL is simultaneously the highest revenue service line in disability care and the most operationally complex. Most providers walk in understanding the revenue side and underestimate the complexity. That gap is exactly where the leakage lives.
Before getting to the 3 leaks, it’s worth understanding the financial foundation.
SIL’s profitability is built on staffing ratios. A 1:3 model, one worker supporting 3 participants, is the most cost efficient. A 1:2 model costs more per participant. A 1:1 model is the most expensive and is reserved for participants with very high or complex individual needs.
In a shared home with 3 participants, you’ll often run a combination. A 1:3 ratio during calm daytime periods, a 1:2 ratio during mornings when personal care needs are highest, and a 1:1 overnight for a participant who needs active night support.
The Roster of Care, the NDIS context document that translates those ratios into a weekly staffing schedule, is what converts your model into actual dollars.
Get the ratios right and model them accurately, and SIL can return a margin of 10% to 16%. Get them wrong, or fail to account for what happens when real life disrupts the model, and you’ll operate at a loss without a clear line item to point to.
That’s what makes these 3 leaks so damaging. None of them show up as one obvious number. They accumulate in the background.
Leak 1: Vacancy periods and unfunded bed costs
Every SIL home carries fixed costs. Rent. Utilities. The base staffing required to keep the home safe and operational. These costs run every week whether all beds are occupied or not.
When a participant leaves, because their circumstances change, because they move to a different arrangement, because the placement breaks down, you lose that participant’s funding contribution immediately.
Your fixed costs don’t move.
And finding and onboarding a new SIL participant takes time. The documentation, the NDIS plan review, the matching process, the transition planning, you’re typically looking at a minimum of 6 to 12 weeks before a new participant is in the home and their funding is flowing.
One vacancy. Ten weeks. That’s approximately $31,000 in costs carried against reduced or absent income.
Most SIL providers will experience at least one vacancy per home per year.
This is not a crisis. It’s a known operational reality. But it needs to be built into your financial model before you take on a home, not discovered after it happens.
Leak 2: The group dynamic problem in shared rosters
This leak is more subtle. It also causes more consistent, invisible damage than the vacancy problem.
In a shared home running a 1:3 model, the funding works because 3 participants share the cost of one worker across each shift. Each participant’s individual budget contributes roughly 1/3 of the staffing cost.
Here’s what happens in practice.
Participant A goes to hospital for 5 days. Or they travel interstate to visit family for 2 weeks. Or they have a series of medical appointments that take them out of the home for large parts of the day.
The roster doesn’t automatically adjust. You still have 2 participants in the home who need support. You can’t simply drop to a 1:2 ratio without that costing more than the 1:3 model was funded to cover.
Now you’re delivering 1:2 support, which costs more per person, while Participant A’s budget is unavailable to contribute to the shared cost.
If you’re claiming against Participant A’s budget during a period when you’re not delivering support to them, that’s a compliance issue. If you’re absorbing the cost of their absence across the other 2 participants’ budgets without appropriate documentation, that’s an allocation issue. If you’re simply not claiming at all during the absence, you’re losing the revenue while still paying the wages.
This happens multiple times per year in every SIL home. It’s not a single dramatic event. It’s a slow, consistent drain that never appears as one obvious line item.
Providers who understand this build it into their quoting model from the start. The ones who don’t spend years wondering why the numbers never quite work.
Leak 3: Unclaimed supports and claiming inaccuracy
The third leak is the one most providers are least comfortable discussing because it feels administrative rather than strategic.
It’s actually one of the most financially significant.
SIL funding is designed to pay for every documented hour of support delivered. In practice, consistent gaps open between the support delivered and the support claimed.
Shift notes completed 2 or 3 days after the shift rather than before the next one starts. Irregular supports, medical appointment escorts, crisis responses, additional hours during a participant’s difficult period, delivered but not captured in the formal claiming system. Sleepover shifts that become active support shifts, claimed at the standard sleepover rate because nobody reviewed the actual record.
Each gap is small. Maybe $50. Maybe $100. A weekend shift claimed at the wrong rate because the rostering software defaulted to standard and nobody checked.
Across a full year, across a whole home, that compounds.
When you add all 3 leaks together, vacancy impact, group dynamic cost, and claiming inaccuracy, you land consistently above $35,000 per participant annually. Some homes are significantly higher.
None of this requires poor intent or negligent practice. It requires only that nobody is watching closely enough.
The estimate framework that changes the picture from the start
Most providers estimate SIL by calculating what the roster looks like and multiplying it out. That’s the first step, but it’s not the complete picture.
A sustainable SIL estimate accounts for 5 layers.
Layer 1: Base roster cost. Your standard weekly staffing based on agreed ratios across all shift types, day, evening, sleepover, active night. Built out shift by shift, with correct award rates applied including penalty rates for weekends and public holidays.
Layer 2: Absence buffer. Based on historical data or industry averages, a percentage of weeks where you’ll be running at a higher than planned ratio because one or more participants are absent. A conservative buffer sits between 8% and 12% of annual staffing cost.
Layer 3: Vacancy provision. A minimum of 4 to 8 weeks of vacancy per year per home, modelled as a known cost distributed across the annual budget.
Layer 4: Irregular support allowance. SIL funding covers regular and predictable supports. But participants are people. Their needs shift, crises happen, medical appointments increase during certain periods. A modest irregular support allowance built into the model means these events are claimed rather than absorbed.
Layer 5: Overhead and margin. Administration, management time, compliance, training, workers compensation, insurance. And an actual margin target, which in SIL should be a minimum of 8% to be sustainable. If the model doesn’t reach 8% before you take on the home, don’t take on the home.
Thin margins in SIL don’t just put your business at risk. They put the quality of care at risk. A home operating at or below cost is always one vacancy, one staffing crisis, or one compliance event away from a decision you don’t want to make.
Profit in SIL is not a bonus. It’s what keeps the home running at the standard your participants deserve.
The operational fix for each leak
For vacancies: the moment you know a participant is leaving, open the transition pipeline, even if departure is months away. Don’t wait for the exit to begin the intake process. SIL placements have long lead times. Your job is to overlap them.
Maintain a warm participant pipeline through relationships with support coordinators, plan managers, and allied health teams who know your homes and your standards. When a bed becomes available, they should hear about it within 24 hours.
And build your vacancy cost into your financial model from the start. Treat it as a known cost of operating SIL, not an emergency that catches you off guard.
For group dynamic leakage: your rostering system needs to flag every time a participant is absent for more than 2 consecutive days. That flag should trigger a review of that week’s actual staffing cost against what the model assumes.
Track the variance every week. If your roster is costing more than your claimed revenue in any given week, you need to know that when it happens, not at month end when the damage is already done.
For claiming accuracy: every shift note needs to be completed before the next shift starts. That’s the standard. If your system allows incomplete notes to move through the claiming process without a flag, fix the system.
Every irregular support delivered needs a same day record. The moment a worker takes a participant to an unplanned medical appointment or responds to something that goes beyond standard shift scope, document it, time, duration, nature of support, so it can be claimed where applicable.
Run a weekly claiming audit. Compare roster hours to claimed hours. Any gap larger than 2% needs an explanation. In most cases, you’ll find unclaimed shifts, incorrect line items, or rate errors that can be corrected before the claiming window closes.
I’ve worked with providers who inherited SIL homes that were losing money every month without understanding why.
The services were good. The participants were well supported. The staff were genuinely committed.
When we put the operational structure in place, not overnight, but methodically, the margin picture changed within 3 months. One home moved from a loss to a 7% margin in a single quarter.
Not through cutting care hours. Not through changing staff pay. Through accurate estimating, vacancy planning, ratio monitoring, and consistent claiming.
That’s what structure does. It doesn’t change what you deliver. It changes whether you can afford to keep delivering it.
Where to start
If you’re running SIL right now, take one hour this week and build the 5 layer estimate against your current home. Not to find fault. To find the truth.
If the numbers work, you’ll have confirmation. If they don’t, you’ll know exactly where to focus.
If you’re considering taking on SIL, run the model before you say yes. The $35,000 leakage figure is not a worst case scenario. It’s what happens when these 3 gaps go unmanaged. And that’s entirely preventable.
SIL is viable. It’s genuinely complex. And it rewards providers who treat it like the serious operational model it is.