SA Land Tax 2026: Investors and Trusts Guide

Land tax is the largest recurring cost most Adelaide investors overlook in their initial yield calculation. A $900,000 investment property might owe $4,000 to $7,000 a year in land tax on top of council rates, water, insurance, and management fees, and that number compounds as portfolios grow and aggregation kicks in. Get it wrong and your "5 percent yield" property is suddenly a 3.6 percent yield property.

This guide explains how SA land tax actually works in 2026, the difference between the general and trust scales, what aggregation does to a multi-property portfolio, and the exemptions that genuinely apply. Use the SA Land Tax Calculator to put real numbers against your own situation.

Who pays SA land tax (and who doesn't)

SA land tax applies to site value of land owned in South Australia, with several important exclusions:

• Your principal place of residence (PPOR) is exempt. Whatever your home is worth, it does not appear in your land tax assessment.
• Primary production land (working farms) is exempt with conditions.
• Land owned by charities, religious bodies, and similar entities is exempt.
• The first dollars of site value below the threshold are tax-free. In 2024-25 the tax-free threshold for individuals is $668,000 of aggregated site value. (Threshold figures are updated annually by RevenueSA; check the RevenueSA land tax page for current numbers.)

If you own only one home and live in it, you owe nothing. If you own an investment property in addition, the investment's site value counts. If you own multiple investments, they all aggregate.

Site value versus market value

This is the single most common source of confusion. Site value is not what you paid. It is the value of the land alone (excluding buildings, improvements, and external factors) as set by the SA Valuer-General. For most metro Adelaide residential properties, site value sits at 40 to 70 percent of market value.

Site value is published on your rates notice each year and is the basis for both council rates and land tax. The Valuer-General reassesses site values regularly. Site value tends to lag the property market by 12 to 24 months on the way up and the way down.

To get your land tax estimate, you need the site value (from your rates notice), not the purchase price or the bank's valuation.

The general scale (individuals and most companies)

The general scale is a stepped bracket system, similar to income tax. Each bracket of site value above the threshold is taxed at a higher marginal rate. The 2024-25 general scale (approximate, check RevenueSA for current numbers):

Aggregated site value	Marginal rate
$0 to $668,000	0% (threshold)
$668,001 to $1,073,000	0.5%
$1,073,001 to $1,560,000	1.0%
$1,560,001 to $2,000,000	2.0%
$2,000,001 and above	2.4%

So an individual owning one investment property with a site value of $900,000 (and their own home, which is exempt) pays 0.5 percent on the portion above $668,000. That's 0.5 percent of $232,000 = $1,160 per year. A second investment with site value of $400,000 brings the aggregated total to $1,300,000, pushing $227,000 into the 1.0 percent bracket and adding $2,270, plus the previously calculated $2,025 from the lower bracket totals, for a total bill of around $4,295.

The trust scale

Land held in a trust is taxed under a separate, less generous scale. The trust scale has a lower threshold and steeper marginal rates. Approximate 2024-25 trust scale (check RevenueSA):

Aggregated trust site value	Marginal rate
$0 to $25,000	0% (much lower threshold)
$25,001 to $668,000	0.5%
$668,001 to $1,073,000	1.0%
$1,073,001 to $1,560,000	2.0%
$1,560,001 and above	2.4%

Trust ownership produces a meaningfully higher land tax bill than personal ownership of the same property. The exception is where the trust nominates a designated beneficiary under specific rules, which can attract general-scale treatment, but this requires the right trust deed wording and an annual notification to RevenueSA. Get accounting advice before assuming you can avoid the trust scale.

Aggregation in action

RevenueSA adds together every taxable parcel you own in SA and runs them as a single bracket calculation. This is aggregation. The practical effect is that two properties each with $700,000 of site value held individually attract less land tax than one $1.4 million property, because each $700,000 gets its own threshold benefit. But hold both in your own name and they aggregate to $1.4 million in a single assessment, costing significantly more.

Aggregation rules also reach across some ownership structures, though not all. Holdings in your sole name aggregate with your individually-held holdings; holdings as joint tenant with another person are typically treated under that joint ownership; holdings in different trusts can sometimes be aggregated by RevenueSA where the trusts have related structures (a complex area, get advice).

When and how it's paid

RevenueSA issues land tax notices in the second half of the financial year, usually around August to October. The assessment covers the financial year 1 July to 30 June. Payment can be in a lump sum or four quarterly instalments (depending on the amount). Penalty interest applies if instalments are missed.

How to reduce the bill, legally

• Time disposals around 30 June. Ownership at midnight on 30 June determines liability for the year just starting. Selling on 28 June removes the property from your assessment for the new year. Buying on 2 July gives you a year before it's counted.
• Spread ownership across spouses. If both spouses can hold land in their own names, each gets their own threshold. This is a legitimate planning approach but interacts with income tax and stamp duty considerations.
• Avoid trust scale unless you need the trust for other reasons. The trust scale rarely beats personal ownership on land tax alone. Trusts can still be net-beneficial for asset protection, estate planning, or income distribution, but make the decision with all factors weighted, not just land tax.
• Consider the threshold cliff effect. Just under $668,000 of aggregated site value pays $0. Just over pays from the first dollar above. If you have any flexibility in how a property is held or improved, staying under the threshold is a cliff worth thinking about.

Frequently asked questions

The bottom line

SA land tax is one of the few costs of investment property that compound non-linearly as the portfolio grows. The first investment is rarely a budget-buster; the third or fourth often is, especially in a trust. Run the maths before you buy, not after. Use the SA Land Tax Calculator with your actual site values and the right scale (general or trust) to know what you're committing to each year.