Stamp Duty Calculator Northern Territory
Calculate NT transfer duty on any purchase price using the verified NT Department of Treasury and Finance schedule. Foreign buyer surcharge included.
Property details
Contract price for the property in NT.
NT stamp duty
$23,929
General transfer duty rate (investor / second-home buyer). FHB concessions, if eligible, reduce this further.
Keep this NT number for tax time
Stamp duty adds to your CGT cost base, so it lowers the tax you pay when you eventually sell. Vestly stores it against the property and tracks cashflow, depreciation, and deductions across your whole portfolio.
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How NT stamp duty works
The Northern Territory uses a piecewise formula for stamp duty: a polynomial below $525,000 and flat-rate brackets above. The Department of Treasury and Finance publishes the formula. This means duty on a $400,000 NT home is unlike any other state - cheaper at low prices, comparable in the middle.
Northern Territory transfer duty brackets (FY 2025-26)
| Dutiable value | Duty payable |
|---|---|
| $0 - $525,000 | D = (0.06571441 x V x V) + 15V, where V = price/1,000 |
| $525,001 - $3,000,000 | 4.95% of the full price (flat) |
| $3,000,001 - $5,000,000 | 5.75% of the full price (flat) |
| $5,000,001+ | 5.95% of the full price (flat) |
Source: NT Department of Treasury and Finance - transfer duty rates
Worked example
A Territorian investor buying a $500,000 residential property in Darwin pays approximately $23,929 in NT stamp duty (before any first-home buyer concession or foreign-acquirer surcharge).
First-home buyer concessions
NT operates the HomeGrown Territory Grant: $50,000 cash grant for FHBs buying or building a new home (replaces the old stamp duty FHB exemption from 1 May 2024). The Senior, Pensioner and Carer Concession provides a $10,000 stamp-duty reduction.
Foreign buyer surcharge
NT does not currently impose a foreign-owner stamp-duty surcharge.
NT-specific quirks
The polynomial formula for prices under $525k means there is no clean bracket structure: each dollar of price changes the duty smoothly. The flat-rate above-$525k schedule has hard cliffs at $525k, $3m, and $5m.
Common questions
When is NT stamp duty payable?
Within 60 days of the dutiable transaction (typically the contract date). Late lodgement attracts penalty interest.
How is NT stamp duty calculated for a $500,000 investor purchase?
Using the polynomial formula with V = 500: D = 0.06571441 x 500 x 500 + 15 x 500 = $16,428.60 + $7,500 = $23,928.60.
Why does NT use a polynomial formula?
The formula produces a smooth marginal rate from $0-$525,000 without bracket steps - it is mathematically equivalent to a continuously-increasing rate. Above $525,000 NT switches to flat brackets.
Does NT have a foreign-buyer surcharge?
No - the NT is the only Australian jurisdiction without a foreign-acquirer stamp duty surcharge. This makes it relatively cheap for international investors at the surface level.
What is the HomeGrown Territory Grant?
A $50,000 cash grant introduced 1 May 2024 for FHBs buying or building a new home in the NT. Replaces the old stamp-duty exemption scheme.
Are there cliffs in the NT schedule?
The polynomial schedule applies up to $524,999 and a 4.95% flat rate applies from $525,000 - but the two rates are designed to meet at the boundary, so the actual jump is only a few dollars. The larger structural cliffs are at $3m (rate steps to 5.45%) and $5m (rate steps to 5.95%).
Need the full upfront-cost picture?
Stamp duty is only one line item. The national Upfront Costs Calculator adds your deposit, LMI estimate, legal fees, inspections, and lender fees - the complete cash-at-settlement figure.
Verified May 2026. Source: NT Department of Treasury and Finance. Indicative only. Confirm with NT Department of Treasury and Finance or a conveyancer before relying on this figure.
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