Updated for the May 2026 reform
Capital Gains Tax Calculator NT
CGT is federal - Territory sellers face the same enacted 2026 rules as the states: the gain splits at 1 July 2027, the earlier slice keeps the 50% discount, later gains use CPI indexation plus a 30% minimum tax. The NT layer is simple in a way no state matches: duty in the cost base ($27,225 on a $550,000 purchase, formula-exact) and no land tax at all during the hold - the only Australian jurisdiction without one.
- Rates verified
- 2026-08-03
- Reform
- Split at 1 Jul 2027
- Classes
- All three
The sale
= sold in FY ending 2036
CGT payable - Established (post-reform)
CPI indexation*$21,599
- Capital gain (proceeds − adjusted cost base)
- $200,175
- Taxable gain after discount/indexation/exemption
- $58,074
- Net proceeds after CGT
- $758,401
The same sale under each regime
Grandfathered
$21,599
CPI indexation
Established (post-reform)
$21,599
CPI indexation
New build
$40,391
50% discount
If CPI runs low or high - the 2-3% band
CPI 2%/yr
$35,075
+$13,476 vs assumed
CPI 2.5%/yr - assumed
$21,599
the headline figure
CPI 3%/yr
$9,148
−$12,451 vs assumed
The enacted law indexes the reset cost base by actual CPI, which no one can know in advance. Higher inflation indexes the cost base harder and lowers the taxed gain; lower inflation does the opposite. The band shown is the RBA inflation target the 2.5%/yr assumption is the midpoint of (source).
The NT costs inside this estimate
- Investor transfer duty at $550,000
- $27,225
- Conveyancing (default)
- $2,000
- Building and pest (default)
- $600
- Selling costs (default 2.5% of sale)
- $20,000
NT stamp duty - the statutory quadratic formula below $525,000, flat rates above - is not deductible while you hold, so it joins the cost base and comes off the gain at sale. Auto-estimated from the Territory Revenue Office formula at the purchase price; override with your contract figures.
CGT is the last chapter of a deal. The full audit runs it against everything that came before - acquisition costs, cash flow and the quarantined loss pool it absorbs.
Deal Auditor - in build, not yet available
*The enacted law indexes cost bases by actual CPI; future CPI is unknowable, so this calculator assumes a 2.5%/yr CPI proxy (the middle of the RBA target band). The 1 Jul 2027 split defaults to a constant-growth interpolation unless you enter a valuation. Confirm the mechanics with your accountant (source). General information only.
CGT in the Northern Territory: federal tax, NT numbers
The Territory keeps the shortest tax ledger in the country: stamp duty on the way in - a statutory quadratic formula below $525,000, flat rates above - and nothing at all on the way through, because the NT levies no land tax. That makes an NT capital gains sum unusually clean. The duty joins your cost base and shrinks the gain; there is no annual land tax line deepening rental losses; and at sale the whole story is the federal one: the enacted 2026 rules splitting the gain at 1 July 2027, the earlier slice banked at 50% discount treatment, the later slice CPI-indexed with the 30% minimum tax. This page starts the cost base with formula-exact TRO duty at your purchase price, overridable with contract figures.
The engine is the audited national one. Darwin's market runs its own cycle, and against a valuation-dated split that matters: gain that accrued before 1 July 2027 is banked at the old treatment, gain after it carries the new rules, and the default constant-growth interpolation smooths whatever the cycle actually did - enter a 1 July 2027 valuation if you hold one. For established purchases contracted after 12 May 2026, the quarantined loss pool is applied against the gain here, though with no land tax feeding it, Territory pools run smaller than state ones. The regime comparison above shows what the house-and-land route saves on the same sale.
The NT stamp duty calculator prices the duty this page adds to your cost base on the way in. While you hold, the Territory charges nothing: the NT has no land tax, the only Australian jurisdiction without one - so the gap between gross and net proceeds here is all federal. And if the property was ever your home first, the NT first home buyer calculator prices the house-and-land package exemption that pairs naturally with the reform's new-build class - and years lived in first feed the main residence exemption and the 6-year absence rule here. The national CGT calculator is this same engine without the NT defaults, and the negative gearing calculator projects the quarantined loss pool this page applies at sale.
Frequently asked questions
How is capital gains tax calculated on an investment property in the NT?
Under federal rules, the same as every state. Sale proceeds after selling costs, minus the cost base: purchase price plus buying costs including Territory stamp duty ($27,225 on a $550,000 purchase, computed by the statutory formula) and legals, less Division 43 capital works claimed. The enacted 2026 reform splits the gain at 1 July 2027 - the earlier slice keeps the 50% discount, later gains use CPI indexation plus a 30% minimum tax - and the taxable amount is added to your income at your marginal rate.
Is CGT different in the Northern Territory?
The federal tax is identical - what differs is how little sits around it. The NT levies no land tax, the only Australian jurisdiction without one, so the annual holding-cost line every state page carries simply does not exist here. Duty joins the cost base as usual, and Darwin's market cycle decides how your gain lands either side of the 1 July 2027 split. Fewer moving parts, same federal sum.
Does having no NT land tax change the CGT outcome?
Not the CGT formula - land tax never enters a cost base anywhere. But it changes the pool. In the states, land tax deepens rental losses, and for post-reform established purchases those losses quarantine into a pool that offsets the gain at sale. With no land tax, an NT property runs a smaller annual loss, builds a smaller pool, and arrives at sale with less to offset - and more cash kept along the way. This calculator takes the pool as an input, so an NT hold simply brings a smaller number.
How does the NT house-and-land exemption interact with the reform?
The Territory's HLPE waives stamp duty on eligible new house-and-land packages, and the federal reform gives first-owner new builds its best CGT treatment - the retained 50% discount for gains accruing after 1 July 2027, plus exemption from the negative gearing quarantine. An eligible NT new build stacks both: no duty on the way in, the discount on the way out. The regime comparison panel above prices the difference against an established purchase on the same numbers.
What did the May 2026 reform change for Territory sellers?
For gains accruing from 1 July 2027 the 50% discount is replaced by CPI indexation plus a 30% minimum tax - for every owner, grandfathered or not. The gain to that date is banked under the old discount rules via a deemed sale that day, so a Darwin hold's cycle timing against 1 July 2027 decides how much sits on each side. First-owner new builds keep the discount for later gains, with a per-sale election for indexation. This calculator uses a labelled 2.5% a year CPI proxy.