Why This Bill Always Arrives as a Surprise
Land tax is the only holding cost most investors never model. Rates, insurance, management fees, maintenance — all of it goes in the spreadsheet. Land tax gets left out, because for the first property it is usually zero, and zero is easy to plan around.
Then it isn't zero, and the jump is not gentle.
Two mechanisms cause nearly every surprise assessment I see. The first is aggregation: RevenueWA adds up all your taxable land in WA and assesses the total, not each property. The second is that the tax applies only to the value above the threshold, which means growth in land values gets amplified into the bill at a rate far higher than the growth itself.
Put those two together in a market where Perth land values have been climbing hard, and you get exactly what happened to my client: a bill that appeared from nowhere and will keep growing on its own.
Here is how the whole thing actually works, and where the bodies are buried.
How WA Land Tax Actually Works
Five facts do most of the work.
It's assessed on land value, not property value
Land tax applies to the unimproved (site) value of the land — the figure Landgate determines, which appears on your rates notice and your assessment. Not the market value. Not what you paid. The house sitting on the block is irrelevant to the calculation. Most investors have genuinely never looked this number up, which is the first reason the bill is a shock.
It's assessed on ownership at midnight, 30 June
Whoever owns the land at midnight on 30 June carries the liability for that assessment year. A settlement date either side of that line changes a full year of tax. RevenueWA issues the assessments after the year begins.
Everything you own in WA is added together
RevenueWA aggregates the unimproved value of all your taxable land across the state under a single assessment — investment properties, vacant land, commercial. Your principal place of residence is excluded from that aggregation. This is the single most important sentence in this article.
Perth metro pays a second layer
The Metropolitan Region Improvement Tax (MRIT) is a separate levy of 0.14 cents in the dollar on aggregated taxable value above $300,000, applying to land in the Perth metropolitan region and funding metropolitan parks and infrastructure. Regional WA land is not subject to it. It is assessed alongside land tax on the same notice, and it is why the real bill is usually bigger than the one people calculate.
Your home is generally exempt — until it isn't
The principal place of residence exemption covers land you use and occupy as your home. Primary production land, charitable land, certain caravan parks and local government land also attract exemptions. But if the use changes — you move out and rent the place — the exemption can go with it.
The Rates and Thresholds
| Aggregated Taxable Land Value | Marginal Rate | Land Tax Payable |
|---|---|---|
| $0 – $300,000 | Nil | Nil |
| $300,001 – $420,000 | Flat fee | $300 |
| $420,001 – $1,000,000 | 0.25% | $300 + 0.25% above $420,000 |
| $1,000,001 – $1,800,000 | 0.90% | $1,750 + 0.9% above $1,000,000 |
| $1,800,001 – $5,000,000 | 1.80% | $8,950 + 1.8% above $1,800,000 |
| $5,000,001 – $11,000,000 | 2.00% | $66,550 + 2.0% above $5,000,000 |
| Above $11,000,000 | 2.67% | $186,550 + 2.67% above $11,000,000 |
The two features worth understanding
The flat-fee band is unusually generous. Between $300,001 and $420,000 the land tax is a flat $300 with no marginal calculation — the same whether your land is worth $300,001 or $420,000. Investors often sit comfortably in this band and conclude land tax is trivial. It is, right up until aggregation pushes them out of it.
The rate more than triples at $1 million. Below that line every extra dollar of land value costs 0.25 cents. Above it, 0.9 cents. That is a 3.6× jump in the marginal rate, and it doubles again to 1.8% past $1.8 million. For a growing Perth portfolio, crossing $1 million of aggregated land value is the moment the cost curve changes shape.
Trap One: Aggregation
This is the mechanism behind my October phone call, and it is the one almost nobody prices in before they buy.
You are not taxed per property. You are taxed on the combined value of everything you own. Which means a second property does not bring its own small bill — it brings the whole portfolio over the line at once.
Held separately the two properties would attract $314 between them. Aggregated, they attract $1,131. The extra $817 a year is not a tax on either property — it is a tax on owning both.
Now add a third with a land value of $450,000. Aggregated value becomes $1,040,000, which pushes you over the million-dollar line and into the 0.9% band.
That third property added $2,015 a year to the holding cost. On its own it would have attracted roughly $585. The difference is aggregation, and it lands on the whole portfolio, not the new purchase.
This is why land tax belongs in the model before you make an offer, not after settlement. The cost of your next property includes what it does to the assessment on everything you already own. I have seen investors buy a property with a yield that worked in isolation and didn't once the portfolio-wide land tax increase was counted.
We model the land tax impact across your whole portfolio before you offer — not just the yield on the property in front of you.
Book a Discovery Call →Trap Two: Your Bill Grows Faster Than Your Land
This is the one that gets people who haven't bought anything in years, and it is pure arithmetic.
Because land tax applies only to the value above the threshold, a rise in land value doesn't lift the bill proportionally. It lifts it disproportionately. The threshold acts as a fixed deduction, so all of the growth lands in the taxed portion.
Land values rose 15%. The bill rose 52%. No purchase, no change of use, no decision made by the owner at all.
In a flat market this is a rounding error. In the Perth market of the last few years — where dwelling values ran above 20% annually and land has been the component doing most of the lifting — it is the difference between a holding cost you planned for and one you didn't.
Land values rose fifteen per cent. The bill rose fifty-two. That gap is the entire reason land tax feels like it comes out of nowhere — the growth you were pleased about last year is the growth you're being taxed on this year.
— Raj Moturu, Enrich Buyers AgencySix More Ways It Creeps Up
Settling Just Before 30 June
Ownership at midnight on 30 June sets the year's liability. Settle on 28 June and you may carry a full assessment year. Settle in early July and you may not. Worth raising with your settlement agent when dates are still moveable.
TimingMoving Out of Your Own Home
The principal place of residence exemption attaches to use and occupation. Move out and rent it, and that land can enter your aggregated total — often pushing the whole portfolio into a higher band in one step.
Change of useVacant Land You Forgot About
Vacant land is taxable land. A block bought years ago and left sitting produces no income but still adds its full unimproved value to your aggregate — and pushes everything else up a band with it.
Non-earning assetMRIT Nobody Budgeted For
Investors calculate land tax off the RevenueWA scale, get a number they can live with, and then find the metro levy on the same notice. On a $1M aggregate that second layer alone runs close to $1,000 a year.
Perth metro onlyStructures That Aggregate Differently
Different owners are assessed separately, and company and trust treatment can differ from individual rates. This is genuinely complex, genuinely case-specific, and genuinely a question for your accountant — not something to design around a blog post.
Get adviceNever Checking Your Land Value
Your unimproved value is set by Landgate and shown on your rates notice. Most investors have never looked. You cannot forecast a bill built on a number you have never read — and you cannot object to a valuation you have never checked.
Go and lookWhat You Can Actually Do About It
Land tax is a cost of doing business, not a problem to be solved. But there is a real difference between an investor who plans for it and one who reacts to it.
Model it before you buy, across the whole portfolio
Calculate what your next purchase does to the assessment on everything you already own, not what it costs in isolation. On a marginal deal, the portfolio-wide increase can be the thing that turns a positive cashflow property into a negative one.
Know where you sit against the bands
If your aggregate is at $950,000, your next purchase crosses into the 0.9% band and everything above the line is charged at 3.6 times the rate below it. Knowing you are approaching a band boundary changes how you think about size and timing.
Remember it is generally deductible
Land tax and MRIT on an investment property are generally deductible as a holding cost against rental income. That softens the real cost meaningfully at higher marginal rates — but confirm the treatment for your circumstances with your accountant, particularly if any property has mixed use.
Consider where you buy, not just what
MRIT applies to Perth metropolitan land only. Regional WA land is outside it. That is not a reason to buy regional — location fundamentals matter far more than a 0.14% levy — but it is a real line item in a comparison between a Perth purchase and one in Bunbury, Geraldton or Albany.
Get the structure right at the start, not the third property
Ownership structure affects how holdings aggregate, and restructuring later means duty and CGT consequences. If you intend to build a portfolio, that conversation belongs with your accountant before purchase one — and note the separate trust tax changes flowing from the 2026 federal budget, which affect the same decision from a different direction.
One useful piece of context for overseas buyers. WA does not currently impose a foreign owner land tax surcharge — unlike NSW, Victoria and several other states. There is, however, a separate foreign buyers duty of 7% on the dutiable value of certain residential acquisitions. Those are two different taxes at two different moments: one annual, one at purchase. Confirm your position with your accountant, as these settings can change.
The Land Tax Checklist
Work through this before your next Perth purchase, and again each May before the 30 June assessment date.
Found the unimproved land value of every property you own — check the rates notice, not the purchase price
Added them together to get your aggregated taxable value
Identified which band that total sits in, and how far you are from the next one
Added MRIT at 0.14% above $300,000 for any metropolitan land
Modelled what your next purchase does to the whole portfolio, not just its own cost
Checked whether any settlement date falls near 30 June
Confirmed your principal place of residence exemption still applies to how you actually use that property
Included any vacant land in the aggregate — it counts even though it earns nothing
Allowed for land value growth in next year's estimate, not just this year's figure
Discussed ownership structure with your accountant before the next purchase, not after
Added land tax and MRIT as a line item in your cashflow model — annually, not as a one-off
Verified current rates and thresholds at wa.gov.au rather than relying on last year's numbers
Frequently Asked Questions
$300,000 of aggregated taxable land value for individual owners. If the combined unimproved value of all your taxable land in WA is at or below $300,000, no land tax is payable. Between $300,001 and $420,000 a flat fee of $300 applies with no marginal calculation. Above $420,000, progressive rates begin at 0.25% and rise to a top marginal rate of 2.67% above $11 million.
Generally no. The principal place of residence exemption applies to land you use and occupy as your home, and that land is excluded from your aggregated total. Primary production land, charitable land, certain caravan parks and local government land also attract exemptions. If the use of a property changes — for example you move out and rent it — the exemption may no longer apply.
RevenueWA aggregates the unimproved value of all your taxable land in WA and issues a single assessment on the combined total, rather than taxing each property separately. This matters more than most investors expect: two properties that would each attract little or no tax alone can attract a substantially larger bill once combined, because the total is pushed into a higher band.
MRIT is a separate levy of 0.14 cents in the dollar on aggregated taxable land value above $300,000, applying to land within the Perth metropolitan region and funding metropolitan parks and infrastructure. It is assessed alongside land tax on the same notice. Regional WA land is not subject to it. Investors who calculate only the land tax scale routinely underestimate their total bill by leaving MRIT out.
Liability is determined by who owns the land at midnight on 30 June each year, and assessments are issued by RevenueWA after that date, with payment due by the date shown on the notice. Because the assessment date is a single point in time, a settlement falling either side of 30 June can change a full year's liability.
Land tax and MRIT on an investment property are generally deductible as a holding cost against rental income in your tax return. The value of that deduction depends on your marginal rate and your circumstances, and mixed-use or partly exempt properties are treated differently. Confirm the position for your situation with a registered tax agent.
WA does not currently impose a foreign owner surcharge on land tax, unlike NSW, Victoria and several other states — foreign owners are assessed on the same scale. A separate foreign buyers duty of 7% applies to the dutiable value of certain residential acquisitions by foreign persons, but that is a one-off transaction cost rather than an annual holding cost. Settings in this area do change, so confirm current rules before relying on them.
Know the Bill Before It Knows You.
20 minutes. No obligation. No property listings. We'll look at where your portfolio sits against the bands and what your next purchase actually costs to hold.
Book a Discovery Call → Limited client spots available at any time