SDA investment returns are frequently marketed using headline yield figures between 10% and 16%. These numbers are not fabrications — but they reflect best-case scenarios under optimal conditions and are rarely achieved in practice without careful suburb selection, correct dwelling category choice, and fast tenanting. This article provides a realistic breakdown of how SDA returns actually work.
How SDA Returns Are Generated
An SDA investment generates income from two sources: the SDA payment from the NDIS (the government funding component) and the reasonable rent contribution (RRC) paid by the tenant from their Disability Support Pension. Together these form the total rental income for the property.
The SDA payment is set by the NDIA based on dwelling type, location, and design category. High Physical Support dwellings in major cities attract the highest payments — typically $25,000–$35,000 per year per resident for a two-resident dwelling. Improved Liveability dwellings attract lower payments, typically $15,000–$22,000 per resident per year.
| Category | Approx. NDIS Payment (per resident/yr) | RRC (per resident/yr) | Total (2 residents) |
|---|---|---|---|
| High Physical Support (HPS) | $28,000–$35,000 | ~$7,800 | $71,600–$85,600 |
| Robust | $22,000–$28,000 | ~$7,800 | $59,600–$71,600 |
| Improved Liveability | $15,000–$22,000 | ~$7,800 | $45,600–$59,600 |
| Fully Accessible | $12,000–$17,000 | ~$7,800 | $39,600–$49,600 |
Gross Yield vs Net Yield — A Critical Distinction
Most developer marketing quotes gross yield — total income divided by purchase or construction price. Net yield accounts for ongoing costs and is the only number that reflects what an investor actually receives.
Typical ongoing costs for an SDA property include: specialist disability support provider (SIL) coordination fees, property management fees (often higher for SDA due to compliance requirements), maintenance and modification costs, building insurance, landlord insurance, and periods of vacancy between tenants.
The vacancy adjustment is the most significant cost most investors underestimate. A property that takes 9 months to tenant in year one does not earn a 12% yield. It earns 25% of a 12% yield — roughly 3% — for that year. Suburb selection is the primary lever that controls tenanting timelines.
Realistic Return Scenarios
Based on actual tenanting data across the suburbs we track, here is what SDA returns look like across three investment scenarios:
| Scenario | Tenanting Timeline | Year 1 Net Yield | Stabilised Net Yield |
|---|---|---|---|
| Best case (undersupplied suburb, HPS, fast tenant match) | 1–3 months | 9–11% | 10–13% |
| Typical case (moderate supply, correct category) | 4–8 months | 6–9% | 8–11% |
| Difficult case (oversupplied suburb, category mismatch) | 12–24+ months | 0–3% | 4–7% |
What Actually Drives SDA Returns
The difference between a 4% and a 12% net yield is not primarily the dwelling specification — it is the suburb. An identical HPS dwelling in Parramatta and in Springfield Lakes will have materially different tenanting timelines and, therefore, materially different actual returns. The dwelling specification determines the maximum possible yield. The suburb determines how much of that maximum is realised.
The three variables our research shows have the strongest correlation with tenanting outcomes are:
- Net demand gap at the time of completion — not today's gap, the projected gap accounting for pipeline builds completing in the same window.
- Category alignment — whether the dwelling design category matches the specific demand profile of the suburb's participant catchment.
- Proximity to existing participant community — NDIS participants choose housing based on proximity to family, support networks, and services. Suburbs with an established participant community attract tenants faster.
The Return vs Risk Trade-off
SDA's headline yields are real, but so is the illiquidity risk. An SDA property that cannot be tenanted is effectively frozen capital — it cannot be re-let on the open market, and it is difficult to sell to another investor while vacant. The risk is not catastrophic loss but opportunity cost: capital tied up in a vacant property is not compounding elsewhere.
Independent suburb selection research — done before a developer's sales pitch, not after — is the most effective risk mitigation available to SDA investors. Our Suburb Reports provide the data needed to make that assessment.