Navigating Land Tax Aggregation in SA: Structuring Multi-Entity Developments

Introduction: The Hidden Tax Risks Behind Multi-Entity Developments

When undertaking property development in South Australia, land tax is a frequently underestimated holding cost. As discussed in our previous article, "Land Tax While You Develop", land tax can directly erode a project's cash flow. To isolate legal and financial risks, developers commonly establish separate Special Purpose Vehicles (SPVs)—typically Pty Ltd companies or trusts—to hold the land for each individual project.

However, many developers fail to realise that the statutory regime in South Australia enforces highly stringent "aggregation" and "corporate grouping" rules. If you do not plan your ownership structures compliantly from the outset, RevenueSA may deem your separate companies to be “related corporations”, and land held through trusts may be assessed at the less favourable trust rates. This can result in the combined valuation of your land holdings being assessed under progressive tax rates, potentially leading to unbudgeted land tax of tens of thousands of dollars, depending on the combined site value.

How Land Tax Aggregation Works and Threshold Indexation

According to RevenueSA guidelines, land tax is calculated based on the total taxable site value of all taxable land owned by a taxpayer as at midnight on 30 June each year. Where multiple properties are held under the same ownership structure, their taxable site values are combined (aggregated) to determine the applicable progressive tax rate.

For the 2026–27 financial year (effective 1 July 2026), the land tax thresholds in South Australia are structured as follows:

• General Tax Threshold: $936,000. This applies to non-trust land ownerships and certain eligible trusts that meet specific statutory criteria.

• Trust Tax Threshold: $25,000. This applies to trusts that do not meet the criteria for assessment at the general rates.

It is critical to note that according to RevenueSA, these thresholds are not static. The general and trust thresholds are adjusted annually based on indexation linked to property site value changes determined by the Valuer-General. Consequently, the actual thresholds for future financial years may vary, and developers must account for these annual adjustments in their long-term financial feasibility models. Because land tax is assessed using a tiered, progressive system, aggregation means that even if your individual development sites each have a site value below the threshold, they may still attract land tax if their combined value exceeds the threshold, with the tax rising progressively as the combined value increases.

The Corporate Grouping Trap: How RevenueSA Links Your Pty Ltds

A common misconception among developers is that holding Project A under Company A Pty Ltd and Project B under Company B Pty Ltd automatically prevents land tax aggregation. However, under RevenueSA's corporate grouping rules, corporations are treated as "related corporations" and assessed as a single "corporate group" if any of the following conditions are met:

• Control is exercised by one corporation over another corporation.

• Control is exercised by the same person over two or more corporations.

• Control is exercised jointly by a corporation and its shareholders, who between them own more than 50% of the issued share capital, over another corporation.

If two corporations are deemed related, any third corporation related to either of them will also be grouped. Where two or more related corporations own land in South Australia, that land is jointly assessed as if it were owned by a single corporation. Consequently, if you are the sole director or majority shareholder of Company A Pty Ltd and Company B Pty Ltd, the site values of the land held by both companies will be aggregated, sharing a single threshold with the excess value taxed at higher progressive rates.

• A corporation that holds more than 50% of the beneficial interests or units in land held under a fixed trust or unit trust will also be grouped with the other corporations for land tax purposes.

Trust Ownership and Threshold Limits

To bypass corporate grouping rules, some developers consider utilising different trusts to hold separate parcels of land. However, trusts face even tighter threshold limits under South Australian land tax legislation.

As noted, for the 2024–25 financial year, the trust tax threshold is a mere $25,000. According to RevenueSA guidelines, trusts must meet specific statutory criteria to be eligible for assessment at the general rates; otherwise, they are subject to the higher trust tax rates. Furthermore, trust aggregation rules are highly complex, and simply establishing multiple trusts does not automatically prevent land tax aggregation. Because the assessment of trust structures involves intricate legal and control considerations, developers must verify the exact compliance requirements with a specialist tax advisor to avoid unexpected tax liabilities arising from the low trust threshold.

Compliant Structuring and Risk Mitigation

To navigate these strict aggregation and grouping rules, developers should consider several compliant structuring strategies during the pre-acquisition phase:

• Genuine Third-Party Partnerships:Whether a joint venture structure results in grouping depends on shareholdings, voting rights and whether parties are acting together; keeping each party at or below 50% does not, on its own, guarantee that entities will not be grouped. This should be assessed by a tax adviser against the specific structure. This requires precise drafting of shareholder and joint venture agreements.

• Independent Control Structures: Ensuring that different development entities have distinct board compositions, share structures, and ultimate control mechanisms.

• Pre-Acquisition Tax Modelling: Factoring potential land tax aggregation into the project's initial feasibility study. If grouping is unavoidable, the projected land tax holding costs must be fully budgeted within the cash flow model.

It is critical to understand that any structure established solely for the purpose of tax avoidance may trigger statutory anti-avoidance provisions. The thresholds, rates, and rules discussed in this article reflect the current legislation for South Australia, and the accompanying banner image is for illustrative purposes only, representing neither a real project nor specific tax advice. Because every development project features unique ownership dynamics, funding requirements, and commercial objectives, developers must consult a qualified accountant, tax lawyer, or specialist property advisor before executing any land contracts or establishing new corporate structures.

Sources

• How land tax is assessed

• Corporate Groups

• Rates and thresholds

• Corporate Groups | RevenueSA

Illustrative image only — not a photograph of a Cyberate PM project. Photo by Tara Winstead on Pexels.