Stamp Duty Calculator NT (2025-26)

Use the NT formula before you commit. Estimate duty with the V-squared method to $525,000 and no foreign buyer surcharge.

2025–26 ATO rates · Updated 15 Feb 2026 · No signup required Estimates only. Not tax or financial advice. Full disclaimer

How does stamp duty work in Northern Territory?

The Northern Territory uses a unique formula to calculate stamp duty for properties valued up to $525,000. Instead of fixed rate brackets, duty is calculated as:

D = (0.06571441 × V²) + 15V

Where V is the property value in thousands of dollars. This creates a smoothly increasing effective rate rather than the stepped brackets used by other states.

For properties over $525,000, a flat rate of 4.95% of the total value applies. Higher rates apply for properties above $3,000,000 (5.75%) and above $5,000,000 (5.95%).

The NT does not offer a general first home buyer stamp duty exemption, but a $50,000 First Home Owner Grant is available, and the House and Land Package Exemption (HLPE) applies to eligible new builds until 30 June 2027.

Northern Territory stamp duty rates

Property value	Marginal rate	Duty payable
$0 – $525,000	V² formula	D = (0.06571441 × V²) + 15V
$525,001 – $3,000,000	4.95%	4.95% of total value
$3,000,001 – $5,000,000	5.75%	5.75% of total value
Over $5,000,000	5.95%	5.95% of total value

Source: Territory Revenue Office. Retrieved 15 Feb 2026. Standard buyer rates shown.

Worked example: Northern Territory stamp duty

Purchase price: $500,000

Estimated stamp duty: $23,929

For a property valued at $500,000 in the NT using the V-squared formula: D = (0.06571441 × 500²) + (15 × 500) = (0.06571441 × 250,000) + 7,500 = 23,928.60 ≈ $23,929 (approximately 4.79% effective rate).

Use the calculator above to estimate stamp duty for any purchase price. The calculator also shows how Northern Territory compares with other Australian states.

City scenario: Darwin

Darwin buyers should account for the NT formula-based curve, which is smooth but still sensitive to purchase-price changes.

In a Darwin scenario around $500,000, this page estimates upfront duty around $23,929 under current published rates.

Verify your result with the official source

Cross-check your estimate against official guidance from Territory Revenue Office . Confirming rates and concessions there helps validate assumptions before settlement.

Northern Territory purchase-planning context

The NT V-squared formula creates a smooth duty curve up to $525,000, unlike bracket jumps used elsewhere. Small purchase-price changes can still alter total duty, but usually without step-change cliffs in lower bands.

The NT does not apply a foreign buyer surcharge on stamp duty. Buyers should still model cash requirements early because formula-based duty can be non-intuitive at first glance.

Is stamp duty tax deductible?

Stamp duty paid on the purchase of an investment property is not an immediately deductible expense. Instead, it forms part of the cost base of the property for capital gains tax (CGT) purposes. This means when you eventually sell the investment property, the stamp duty you paid at purchase reduces your taxable capital gain, lowering your CGT liability.

For your principal place of residence, stamp duty is generally not tax deductible at all, as the main residence CGT exemption means the cost base is typically irrelevant.

Assumptions and limitations

Standard buyer rates shown. First home buyer concessions and foreign surcharges are calculated separately using the buyer type selector.
The V-squared formula is used for properties up to $525,000. This creates a smooth curve rather than stepped brackets.
Does not model off-the-plan concessions, regional variations, or exemptions for specific transaction types (e.g. related party transfers, family law).
Duty is calculated on the purchase price. In some cases, revenue offices may assess duty on the market value if it is higher than the contract price.

Stamp duty calculators for other states

Compare stamp duty across all Australian states and territories or view rates for a specific state:

Stamp Duty Calculator (all states and territories) - compare every state side by side
Stamp Duty Calculator NSW (New South Wales) - top rate: 7.0%
Stamp Duty Calculator VIC (Victoria) - top rate: 6.5%
Stamp Duty Calculator QLD (Queensland) - top rate: 5.75%
Stamp Duty Calculator WA (Western Australia) - top rate: 5.15%
Stamp Duty Calculator SA (South Australia) - top rate: 5.5%
Stamp Duty Calculator TAS (Tasmania) - top rate: 4.5%
Stamp Duty Calculator ACT (Australian Capital Territory) - top rate: 5.86%

Frequently asked questions

How much is stamp duty in the NT?

NT stamp duty for properties up to $525,000 is calculated using a unique V-squared formula: D = (0.06571441 × V²) + 15V, where V is the property value in thousands. Above $525,000, a flat rate of 4.95% applies. Higher rates of 5.75% and 5.95% apply above $3,000,000 and $5,000,000 respectively.

Are first home buyers exempt from stamp duty in the NT?

The NT does not offer a general first home buyer stamp duty exemption. However, the House and Land Package Exemption (HLPE) provides stamp duty relief for new builds purchased from registered builders until 30 June 2027. A $50,000 First Home Owner Grant is available separately.

Does the NT have a foreign buyer surcharge?

No. The Northern Territory does not impose a foreign buyer surcharge on stamp duty.

How does the NT V-squared formula work?

For properties valued up to $525,000, NT uses a mathematical formula instead of fixed brackets: D = (0.06571441 × V²) + 15V. V is the value in thousands (e.g. $400,000 = 400). This creates a smoothly increasing effective rate rather than jumps between brackets.

Do I pay stamp duty on investment property in the NT?

Yes. All property purchases in the NT attract stamp duty at the standard rates. The rates are the same for owner-occupiers and investors.

Is stamp duty tax deductible in the NT?

Stamp duty is not immediately deductible. For investment properties, it forms part of the cost base for capital gains tax.

Important Disclaimer

This calculator provides general information only and is not intended as tax advice, financial advice, or a recommendation to buy, sell, or hold any investment property. The results are estimates based on the information you provide and the tax rules applicable to the 2025-26 financial year.

Tax rules and rates are subject to change. The calculations may not account for all factors that apply to your specific situation, including but not limited to: HELP/HECS-HELP repayments, Medicare Levy Surcharge, private health insurance rebate adjustments, foreign income, or trust distributions.

We are not affiliated with the Australian Taxation Office (ATO) or any state or territory revenue office. All rates and thresholds are sourced from publicly available government data (see sources below).

Seek professional advice. For advice specific to your financial situation, speak with a registered tax agent, accountant, or licensed financial adviser.

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