These two taxes get confused constantly, partly because both are charged by state and territory governments (never the federal government) and both relate to owning property. But they're triggered by completely different events, calculated in completely different ways, and — critically — you can owe one without ever owing the other.
The core difference: a moment vs a duration
Stamp duty (also called transfer duty or land transfer duty, depending on the state) is a one-off tax charged when a property changes hands. It's assessed once, at settlement, based on the property's purchase price or unencumbered value — whichever is higher. Once it's paid, that's the end of it for that transaction; it never recurs while you continue to own the property.
Land tax is the opposite: an ongoing, typically annual tax on land you continue to hold, assessed each year against the total taxable value of your landholdings in that state. It has nothing to do with buying or selling — you can own a property for 20 years and pay land tax on it every single year, without a single transaction taking place.
Why your own home usually only ever attracts one of them
Every state and territory land tax regime exempts (or in ACT's case, doesn't apply land tax to at all) a person's principal place of residence. So the home you actually live in generally attracts stamp duty once, at purchase, and no land tax at all for as long as it remains your home. Land tax becomes relevant once you own property beyond your own home — an investment property, a holiday house, vacant land, or landholdings used for farming above a state's tax-free threshold.
Both are calculated completely differently by state
Unlike the federal capital gains tax regime — one set of rules, applied nationally — land tax and stamp duty are each administered independently by eight separate state and territory revenue offices, with genuinely different thresholds, rate scales and exemptions. A few examples of just how differently these are built:
- The Northern Territory has no general land tax at all — the only Australian jurisdiction where that's true — while every other state and territory does.
- The ACT applies land tax only to rented, vacant, trustee-owned or secondary rented dwellings — never to an owner-occupied principal residence — and, unusually, has no dollar-value tax-free threshold at all, charging from the first dollar of value.
- NSW and South Australia apply a distinct, tighter land tax threshold to property held in a trust than to property held by an individual, while other states largely tax trusts on the same scale as individuals or companies.
- Stamp duty first-home-buyer relief varies hugely in generosity — from full exemptions up to $800,000 in NSW to no confirmed price cap at all in South Australia for new homes, down to a scheme that closed entirely in Tasmania as of 30 June 2026 with no replacement announced.
This is exactly why a single national "property tax calculator" can't work for either tax — the correct figure genuinely depends on which state or territory the land sits in.
Where the two taxes actually interact
A landholder can face both taxes on the same property in the same year: stamp duty once, at purchase, and land tax annually thereafter for every year they hold it above the threshold. Primary production land is the one area where both taxes commonly offer parallel relief — most states provide both a land tax exemption and a separate stamp duty family-farm exemption for genuine farming property, though the eligibility tests for each are set independently and passing one does not automatically mean you pass the other. See ourprimary production exemptions guide for the detail, state by state.
Frequently Asked Questions
If I've already paid stamp duty, do I still owe land tax?
Potentially, yes — they're unrelated. Stamp duty is a one-off cost of the purchase; land tax is a separate, ongoing annual liability based on what you continue to hold.
Does my home ever attract land tax?
Generally no, provided it genuinely remains your principal place of residence — every jurisdiction exempts this, though the exact test for "principal place of residence" varies by state.
Which is more expensive?
It depends entirely on the property value, the state, and how long you hold it — stamp duty is a larger one-off amount, while land tax is smaller but recurs every year, so total land tax paid over a long holding period can eventually exceed the original stamp duty.
Where can I calculate my actual figure for each?
Use our Land Tax Calculator and Stamp Duty Calculator to compare every state, or jump straight to your own.
Updated on 2026-08-06 — what changed
Initial publication of this guide, synthesised from the state-by-state figures already verified across this site's land tax and stamp duty pages.