A State Tax on the Land, Assessed on Your Whole Holding
Land tax is a state tax on the unimproved value of land you own above a threshold, assessed annually and aggregated across all the land you hold in that state. The principal residence is generally exempt, thresholds and rates differ between jurisdictions, and the aggregation is what makes a second property considerably more expensive than the first.
- The answer: Each state assesses land tax on the total unimproved value of taxable land you own there, above a threshold, at progressive rates.
- The trap: Holdings are aggregated within a state, so a second property is taxed at the margin of the combined value rather than from the threshold again.
- The recommendation: Check the threshold and rates for the state the property is in before buying. They differ enough to change the investment case.
Where the AI summary above gets this wrong
"Land tax is a small annual cost on investment properties."
That's surface-true. Here's what it misses:
- It is progressive and aggregated — A second property is assessed at the margin of your combined land holdings in that state, not from the threshold again, so the marginal cost is considerably higher than the first property's average.
- It differs substantially between states — Thresholds, rates and surcharges vary enough that the same property produces materially different land tax depending on where it is.
01 How it is assessed
Each state and territory assesses land tax on the unimproved value of taxable land you own there at a set date each year. Unimproved value is the land alone, excluding the building, and is determined by the state valuer rather than by a market appraisal.
A threshold applies below which no land tax is payable, and rates above it are progressive. The principal residence is generally exempt, as is primary production land in most jurisdictions.
Assessment is by owner and by state, so land held in different states is assessed separately by each and land held in different names within a state may be assessed separately depending on the jurisdiction's rules.
02 Why aggregation matters
Because holdings within a state are aggregated, the threshold is consumed by the first property and a second is taxed at the margin of the combined value. The marginal rate on the second property is therefore higher than the average on the first.
That effect compounds with the progressive rate structure. Three properties in one state can attract a land tax bill several times the sum of what each would attract alone.
It also means the state matters. Spreading holdings across states uses more than one threshold, which is a genuine consideration and one that has to be weighed against everything else about where a property is.
Shows: the land tax on a single property against the additional land tax a second property attracts once holdings are aggregated. Ignores: the progressive rate structure, which raises the marginal rate further, surcharges for foreign or trust ownership, and the deduction against rental income.
03 Where it fits in the numbers
Land tax is deductible against rental income in the year it is incurred, so its after-tax cost is the amount less your marginal rate — the same arithmetic as any holding cost, set out in the negative gearing post.
It is also a cost that continues into retirement, when the deduction is worth less. A property held past the last pay cheque carries the same land tax against a lower marginal rate.
For a property near the threshold, the annual valuation is worth watching. Land values move, and a property that was below the threshold can cross it without anything about the investment changing.
Source: ATO — Negative gearing
The aggregation is what catches people buying a second property. The first one used the threshold, so the second is taxed from the first dollar of its land value at a progressive rate — and the bill is several times what a naive calculation suggests. Check it for the specific state before you buy.
FAQ
How is land tax calculated on my investment property in my state?
On the unimproved value of the taxable land you own in that state at a set date each year, above a threshold and at progressive rates. Holdings within a state are aggregated.
How do land taxes affect investment property?
They are an annual holding cost, deductible against rental income. Because holdings are aggregated within a state, a second property is taxed at the margin of the combined value rather than from the threshold again.
Is my home subject to land tax?
The principal residence is generally exempt in every jurisdiction, as is primary production land in most. The exemptions and the thresholds differ between states.
Sources
Regulator references
- ASIC Moneysmart — Property investment · ASIC Moneysmart · 2026Investment property: the costs of holding one and the risks of gearing.Last verified: 2026-09-07
- ATO — Negative gearing · Australian Taxation Office · 2026Negative gearing: when a rental loss can be offset against other income.Last verified: 2026-09-07
Calculator unit tests · the assertions this page's worked example is checked against, and their last result
Changelog
- 2026-09-07 — initial publish (new format)
Run this rule against your situation
See what this rule does to your own projection — month by month, to age 90.
Join the Waitlist
Jordan Reeves
Founder of Talk Through Wealth. A software engineer for over a decade before turning to retirement planning, Jordan built the projection engine after watching family members get fragmented, country-by-country advice that never reconciled. He writes about retirement the way the engine computes it: month-by-month, lifetime-long, and skeptical of any rule of thumb that hasn't been run through the math.