Calculator
NT stamp duty calculator
The Territory Revenue Office charges stamp duty on dutiable instruments. Below $525,000 the formula is not a simple percentage: duty = 0.06571441 × V² + 15 × V, where V is the dutiable value in thousands of dollars.
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Estimated stamp duty
$44,550
- State or territory
- Northern Territory (NT)
- Buyer type
- Standard purchaser (general rates)
- Property value
- $900,000
- Stamp duty (transfer duty)
- $44,550
- Effective rate
- 4.95%
Based on NT transfer duty rates (residential) as at July 2026. NT rates → · Territory Revenue Office →
Estimates only. Assumes an Australian-resident buyer and no foreign-purchaser surcharge. Verify with a conveyancer.
About stamp duty in the Northern Territory
The quadratic formula is why a $400,000 Territory purchase does not sit on a neat marginal table. This calculator applies that formula and rounds to the nearest dollar, matching the published method.
Above $525,000 the rate is a flat 4.95% to $3 million, then 5.75% to $5 million, then 5.95%. The Territory does not add a foreign-purchaser surcharge in this model.
NT Land Titles Office standard instrument lodgement (transfer) is $181.
NT transfer duty rates
General (investor) residential schedule used by this calculator. Home and first-home results can be lower where the concessions listed below are modelled.
| Dutiable value | Duty |
|---|---|
| Up to $525,000 | 0.06571441 × V² + 15 × V, where V is dutiable value in thousands of dollars |
| $525,001 – $3,000,000 | 4.95% of the dutiable value |
| $3,000,001 – $5,000,000 | 5.75% of the dutiable value |
| More than $5,000,000 | 5.95% of the dutiable value |
Worked examples
Same engine as the form above. Investor is the general table. Home is the owner-occupier result where one is modelled. First home is an established home you will live in.
| Price | Investor | Home | First home |
|---|---|---|---|
| $500,000 | $23,929 | $23,929 | $23,929 |
| $800,000 | $39,600 | $39,600 | $39,600 |
| $1,000,000 | $49,500 | $49,500 | $49,500 |
| $1,500,000 | $74,250 | $74,250 | $74,250 |
Concessions this calculator models
- A first-home checkbox does not change the NT result on this calculator. Confirm current first-home and Principal Place of Residence rebates with the Territory Revenue Office.
- No NT foreign-purchaser surcharge is applied here.
NT Land Titles Office standard instrument lodgement (transfer): $181.
Common questions
- How much NT stamp duty on a $500,000 house?
- At $500,000 the quadratic formula applies (V = 500): about $23,929, plus the $181 titles lodgement. It is not 4.95% of the price.
- When does the NT flat percentage start?
- From $525,001 the rate is 4.95% of the whole dutiable value, up to $3 million. Below $525,000 inclusive, use the quadratic formula.
- Does the NT add a foreign-purchaser surcharge?
- Not in this model. The Territory Revenue Office figure for an Australian-resident buyer is the schedule above.
Compare stamp duty across Australian states → · NT first-home stamp duty → · NT vacant land stamp duty → · How much to buy a house in NT → · NT suburb profiles →
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