NT Stamp Duty Explained: Rates Concessions and How to Calculate It

The Northern Territory operates the most unusual stamp duty calculation in Australia: a quadratic formula for properties under $525,000, then flat marginal rates above. No foreign purchaser surcharge applies (the NT is one of only 2 Australian jurisdictions without one), and a generous house and land package exemption sits alongside two cash grants for new homes: the HomeGrown Territory grant for first home buyers and the FreshStart New Home Grant for everyone else. This guide walks through the 2026 NT formula, the rate brackets and how the calculation actually works.

AgentBridge publishes this for buyers and developers active in the NT who need an accurate duty figure for budgeting. Figures are sourced directly from the Territory Revenue Office (TRO) and current as at 22 May 2026.

What Stamp Duty Is in the NT

Stamp duty (the formal name in the NT) is a territory tax on the dutiable value of a property transfer. The dutiable value is the higher of the consideration paid or the unencumbered market value of the property. The Territory Revenue Office, part of NT Treasury and Finance, administers the tax under the Stamp Duty Act 1978.

The buyer pays the duty. It falls due within 60 days of the dutiable transaction date. Late payment attracts interest and penalty tax.

The NT uses a 2-tier rate structure. For properties under $525,000, a quadratic formula calculates duty in a non-linear way. For properties at or above $525,000, flat marginal rates apply.

The 2026 NT Stamp Duty Rate Schedule

The NT rate schedule has 2 parts.

Properties under $525,000. Formula-based calculation.

D = (0.06571441 × V²) + (15 × V)

Where:

• D = stamp duty payable, in dollars
• V = dutiable value divided by 1,000 (so a $400,000 property gives V = 400)

This produces a smooth, non-linear duty curve where the effective rate increases progressively with property value. A handful of worked points illustrate the curve:

Properties at $525,000 and above. Flat marginal rates.

The flat rates above $525,000 apply to the total dutiable value, not just the amount above the threshold. This creates a small notch effect at $525,000 where duty jumps to 4.95% of the full purchase price.

Worked Example. Calculating Duty on a $750k and $1.5M Purchase

Two worked examples show how the calculation works in practice.

Example 1. $750,000 owner-occupied home in Darwin.

The $750,000 purchase sits above the $525,000 threshold and below $3,000,000. The flat 4.95% rate applies to the total value.

4.95% of $750,000 is $37,125.

A buyer purchasing a new house-and-land package from a building contractor in a single transaction may qualify for the House and Land Package Exemption (HLPE), eliminating duty entirely on a qualifying transaction (refer below). The HLPE is not limited to first home buyers.

Example 2. $1,500,000 commercial property in Darwin CBD.

The $1,500,000 purchase sits above the $525,000 threshold and below $3,000,000. The flat 4.95% rate applies to the total value.

4.95% of $1,500,000 is $74,250.

The NT does not impose a foreign purchaser surcharge, so a foreign buyer pays the same $74,250.

First Home Buyer Concession or Exemption. Who Qualifies and What You Get

The NT supports home buyers through one stamp duty exemption and two cash grants. Each works differently.

House and Land Package Exemption (HLPE).

A full stamp duty exemption is available on the purchase of a house-and-land package from a building contractor in a single transaction. Available for contracts dated between 1 July 2022 and 30 June 2027. It is open to first home buyers and other owner-occupiers alike.

Key conditions:

• The home must be detached and new (built, completed or transferred by the contractor).
• No means test or property value cap applies.
• At least one applicant must occupy the home as their principal place of residence for a continuous period of 6 months commencing within 12 months of completion.

The HLPE delivers the largest single duty benefit available in the NT. Buyers purchasing a brand new house and land package pay $0 stamp duty regardless of price.

No first home buyer duty concession on established homes.

The NT's current home owner assistance schemes do not include a stamp duty discount for first home buyers of established homes. A first home buyer buying an existing home pays duty at the standard rates. A $10,000 HomeGrown Territory cash grant (not a duty concession) was available for first home buyers who signed a contract to buy an established home between 1 October 2024 and 30 September 2025; it has closed.

HomeGrown Territory grant.

A $50,000 grant (not a duty exemption) for first home buyers building or buying a new home, including off-the-plan purchases and owner-builders, for contracts signed between 1 October 2024 and 30 September 2027. It is for first home buyers only and replaces the $10,000 First Home Owner Grant for that period. There is no cap on the build or purchase price, and the buyer must live in the home for 12 months. Detailed in the companion NT First Home Owner Grant article.

FreshStart New Home Grant.

A separate $30,000 grant for buyers who are not first home buyers, including people who own or have owned property, to build or buy a new home to live in. It covers contracts signed between 1 October 2024 and 30 September 2027, carries the same 12-month residence requirement and cannot be combined with the HomeGrown Territory grant.

To qualify under the HLPE and the grants, buyers must meet citizenship or permanent residency requirements (at least one applicant), age tests (18 or over) and occupation tests.

Foreign Purchaser Surcharge

The NT does not impose a foreign purchaser surcharge on residential property. This is one of only 2 Australian jurisdictions (alongside the ACT) without a residential property surcharge for foreign buyers.

Foreign buyers acquiring residential property in the NT still need Foreign Investment Review Board (FIRB) approval and pay FIRB application fees, but no additional territory duty applies.

Other Concessions Worth Knowing

Several other stamp duty concessions and exemptions exist in the NT.

Senior, Pensioner and Carer Concession. Eligible seniors, pensioners and carers receive a stamp duty concession on the purchase of a principal place of residence. Specific eligibility tests apply, including age, pension status and occupation. Confirm thresholds and concession amount with the TRO.

Primary Producer Concession. Transfers of certain primary production land may qualify for full or partial duty exemption, subject to use, area and ownership tests.

Spousal and de facto transfers. Transfers of an interest in a matrimonial home between spouses or de facto partners are generally exempt, subject to specific conditions.

Family Court and binding financial agreement transfers. Transfers ordered by a court or under a binding financial agreement following separation are exempt.

Deceased estate transfers. Transfers to a beneficiary in accordance with a will or under the laws of intestacy attract nominal duty only.

The NT has no land tax (also unique among Australian jurisdictions), meaning the ongoing cost of holding property is materially lower than in other states.

How and When You Pay

Stamp duty in the NT is assessed by the TRO based on the executed conveyance or transfer. The buyer's conveyancer lodges documents through the Integrated Land Information System (ILIS) or directly with the TRO.

Duty must be paid before the transfer can be registered with the NT Land Titles Office. In practice, payment is settled through the buyer's conveyancer at settlement, drawn from the buyer's settlement funds.

The strict legal deadline is 60 days from the dutiable transaction date. Late payment attracts interest at a published market rate and penalty tax.

Speak to a licensed conveyancer for advice on timing and any concessions that may apply to your specific purchase.

Frequently Asked Questions

What is the NT stamp duty formula for properties under $525,000? The formula is D = (0.06571441 × V²) + (15 × V), where V is the dutiable value divided by 1,000 and D is the duty payable in dollars. For example, a $400,000 property gives V = 400, producing duty of approximately $16,514.

Does the NT have a foreign buyer stamp duty surcharge? No. The NT does not impose a foreign purchaser duty surcharge on residential property. Foreign buyers still need FIRB approval and pay FIRB fees, but no additional territory duty applies.

Is the NT House and Land Package Exemption available to investors? The HLPE requires at least one applicant to occupy the home as their principal place of residence for a continuous period of 6 months commencing within 12 months of completion. Pure investor purchases (with no owner-occupation) do not qualify. No property value cap or means test applies for owner-occupiers.

What is the HomeGrown Territory grant? A $50,000 grant (not a duty exemption) for first home buyers building or buying a new home in the NT, for contracts signed between 1 October 2024 and 30 September 2027. It is for first home buyers only. Buyers who are not first home buyers may instead qualify for the separate $30,000 FreshStart New Home Grant over the same period. Specific eligibility tests apply.

Does the NT have land tax? No. The Northern Territory has no land tax, the only Australian jurisdiction without one. This makes the ongoing cost of holding investment property in the NT materially lower than in other states.

Related Resources

• Australian Stamp Duty Explained State by State: AgentBridge national pillar on transfer duty across all 8 states and territories.
• How to Buy Property in the Northern Territory: the full NT purchase process from offer to settlement.
• NT First Home Owner Grant and HomeGrown Territory for 2026: companion guide to the FHOG, HomeGrown Territory grant and the wider NT first home buyer support landscape.

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Figures sourced from the Territory Revenue Office and NT Treasury and Finance. This article is general information only and does not constitute financial product advice. Confirm current rates and your eligibility directly with the TRO or a licensed conveyancer before signing any contract.