NT Stamp Duty Calculator Australia

Estimate Northern Territory stamp duty on a property purchase.

Property price$

—stamp duty payable

—effective rate

General (non-concession) NT stamp duty rate. First home owners and other concessions may reduce what you actually pay — check the Territory Revenue Office before relying on this figure.

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About the NT Stamp Duty Calculator

Stamp duty is a one-off tax the Northern Territory charges when you buy property, based on the purchase price or market value, whichever is higher. Unlike most states, the NT doesn't publish a simple marginal-bracket table for lower-value properties — instead it uses a formula. This calculator applies that formula to estimate the duty payable.

How it works

For property prices up to $525,000, the NT uses a quadratic formula that smoothly increases the effective rate as the price rises. Above $525,000, duty is simply a flat percentage of the full price — 4.95% up to $3,000,000, and 5.45% above that.

Assumptions and behaviour

Uses the general rate formula — no first home owner or other concession applied.
Assumes a standard residential purchase.
The formula and thresholds are current as of the effective date noted below; the Territory Revenue Office revises these periodically.

Limitations

First home owner concessions and other NT schemes are not modelled — check eligibility with the Territory Revenue Office separately.
Foreign investor surcharge duty is not included.
Rates are periodically revised — confirm the current formula and thresholds with the Territory Revenue Office before settlement.

Privacy

The calculation runs entirely in your browser. Nothing is uploaded or stored.

Frequently asked questions

Is this NT stamp duty calculator free?

Yes — free, no sign-up, no limits, runs in your browser.

Why does NT use a formula instead of brackets?

For properties up to $525,000, the Northern Territory applies a quadratic formula rather than a simple bracket table, which produces a smoothly rising effective rate rather than the stepped rate other states use.

Does this include first home owner concessions?

No. This shows the general rate formula. First home owners may be eligible for a concession — check current eligibility with the Territory Revenue Office.

How accurate is this estimate?

It applies the Territory Revenue Office's published general rate formula as at the effective date shown, but rates are periodically revised — always confirm the exact figure before settlement.

Is my data uploaded?

No. Everything runs locally in your browser; nothing is sent or stored.

Written by Lakshay Kumar(TechLakshay)

A QA Automation Engineer by trade, Lakshay's real passion is untangling complex problems into simple, working solutions — which is exactly why FreeMyTask exists. On Instagram, he channels that same instinct into helping 26,000+ content creators with SEO education, motivation, and hands-on query solving.

Last updated: August 22, 2026