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NT stamp duty calculator

Estimate Northern Territory stamp duty on land, development sites, and property purchases. The calculator uses the NT formula for lower-value property transfers and percentage rates for higher-value transfers. Concessions, exemptions, and special cases are not included.

Inputs

Estimated duty

NT stamp duty$49,500
Total duty$49,500
Effective duty rate4.95%
Bracket used$525,001 – $2,999,999

Assumptions

  • Northern Territory stamp duty on the dutiable value (usually the greater of price paid or market value).
  • For a dutiable value up to $525,000, duty is worked out from the NT formula D = (0.06571441 × V²) + 15V, where V is the dutiable value divided by 1,000.
  • Above $525,000, a flat percentage of the whole dutiable value applies: 4.95% up to $3,000,000, 5.75% from $3,000,000 up to $5,000,000, and 5.95% at $5,000,000 and above.
  • No first home owner, principal place of residence, pensioner, senior or other concessions, exemptions or special cases are applied.

Based on Northern Territory land or property transfer stamp duty guidance from the NT Government. Check the NT Government for official guidance.

Want the full acquisition cost stack?

Stamp duty is only one acquisition cost. For development screening, you may also want to allow for legal fees, due diligence, debt costs, land tax, rates, and holding costs.

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The basics

How NT stamp duty works

  1. 01

    Stamp duty

    In the Northern Territory, the duty on a property or land transfer is called stamp duty, administered by the Territory Revenue Office for the NT Government. It is the same idea as transfer or conveyance duty in other states.

  2. 02

    Based on dutiable value

    Duty is worked out on the dutiable value, usually the higher of the purchase price or the market value of the property.

  3. 03

    A formula for lower values

    For a dutiable value up to $525,000, the NT works the duty out from a formula on the value, not a flat rate or a per-$100 bracket. The formula is D = (0.06571441 × V²) + 15V, where V is the dutiable value divided by 1,000.

  4. 04

    Percentage rates above $525,000

    Above $525,000, a flat percentage applies: 4.95% up to $3,000,000, 5.75% from $3,000,000 up to $5,000,000, and 5.95% at $5,000,000 and above.

  5. 05

    Charged on the whole value

    Above $525,000, the percentage applies to the whole dutiable value, not just the amount over the threshold. The formula and the 4.95% rate produce the same result at $525,000, so the bands join smoothly.

  6. 06

    No foreign purchaser surcharge

    The Northern Territory does not apply the standard one-off foreign purchaser stamp duty surcharge used by other states, so there is no surcharge toggle on this calculator.

The formula

What the NT stamp duty formula means

The Northern Territory is the only Australian jurisdiction that works lower-value duty out from a formula. For a dutiable value up to $525,000, duty is D = (0.06571441 × V²) + 15V, where V is the dutiable value divided by 1,000.

In practice that means the duty rises a little faster than a flat percentage as the value grows, then settles at flat percentage rates above $525,000 — 4.95%, then 5.75% from $3,000,000, then 5.95% from $5,000,000, each applied to the whole dutiable value. The formula and the 4.95% rate meet exactly at $525,000, so there is no jump at the join. This calculator shows the duty before any concession, exemption, or special case. Confirm your position with the NT Government or a qualified professional.

Rate table

NT stamp duty rates

These are the NT stamp duty bands that the calculator uses, shown here for reference.

Dutiable valueStamp duty
$0 – $525,000Formula: (0.06571441 × V²) + 15V, where V is the dutiable value ÷ 1,000
$525,001 – $2,999,9994.95% of the whole dutiable value
$3,000,000 – $4,999,9995.75% of the whole dutiable value
Over $5,000,0005.95% of the whole dutiable value

NT note: up to $525,000, duty follows the formula rather than a flat rate. The formula produces the same result as 4.95% of the value at exactly $525,000, so the bands join smoothly. Above $525,000, the percentage applies to the whole dutiable value, not just the amount over the threshold.

Based on Northern Territory land or property transfer stamp duty guidance from the NT Government. Check the NT Government for official guidance.

Scope

What this calculator includes and excludes

Includes

  • Northern Territory property transfer stamp duty estimate
  • NT lower-value transfer formula
  • NT higher-value percentage rates
  • Land, development sites, and property purchases where duty applies
  • Optional developer view with duty per sqm

Excludes

  • First home buyer assistance
  • Principal place of residence concessions
  • Senior, pensioner, or other concessions
  • Exemptions and special cases
  • Foreign purchaser duty surcharge
  • Complex mixed-use apportionment
  • Trust, company, aggregation, related-party, landholder, indirect acquisition, or special transaction rules

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Questions

NT stamp duty FAQs

Is this stamp duty or conveyance duty in the NT?

The Northern Territory calls the duty on a property or land transfer stamp duty, administered by the Territory Revenue Office. It is the same idea that other states call transfer duty or conveyance duty.

How does the NT formula work?

For a dutiable value up to $525,000, NT works the duty out from a formula on the value: D = (0.06571441 × V²) + 15V, where V is the dutiable value divided by 1,000. Above $525,000, a flat percentage of the whole value applies instead.

What happens at $525,000?

The formula and the 4.95% rate produce the same duty at $525,000, so the bands join smoothly. Up to $525,000 the formula is used; above $525,000 the flat percentage applies to the whole dutiable value.

Does this calculator work for land purchases?

Yes. It covers land, development sites, and property purchases where duty applies. Enter the purchase price or dutiable value to get an estimate.

Does it include a foreign purchaser surcharge?

No. The Northern Territory does not apply the standard one-off foreign purchaser stamp duty surcharge used by other states, so there is no surcharge in this estimate. Confirm your position with the NT Government.

Does it include concessions or exemptions?

No. It shows the duty before any concession, exemption, or special case. It does not apply first home owner assistance, principal place of residence concessions, senior or pensioner concessions, or any exemption.

Is this official tax advice?

No. It is a general estimate to help you plan. For a binding figure, or for a complex, mixed-use, commercial, or related-party deal, check with the NT Government or a qualified professional.