Is the CGT discount gone completely from 1 July 2027?

Yes, for individuals, trusts and partnerships. It's replaced with CPI cost-base indexation plus a 30% minimum tax top-up on net capital gains. Companies and complying super funds are out of scope for this change.

What happens to an asset I already own?

The Act treats it as sold at market value just before 1 July 2027 and bought back at that same value just after. The gain up to that point keeps the current 50% discount rules; growth after that date is indexed under the new rules.

Is the 30% minimum tax a flat rate on my capital gain?

No. It's a top-up, calculated separately, that only bites if your marginal-rate tax on the gain would otherwise come in under 30% of it. If your marginal rate is already 30% or higher on the gain, the top-up is zero.

Do Age Pensioners pay the 30% minimum tax?

No — receiving Age Pension (or several other listed income-support payments) at any point in the income year exempts you from the 30% minimum tax top-up for that whole year.

CGT Calculator 2027 New Rules

See your capital gain under today's 50% discount and under the new rules taking effect 1 July 2027 — CPI cost-base indexation plus a 30% minimum tax top-up — side by side.

The 50% CGT discount changes from 1 July 2027 — what changes

Asset & Dates

Acquisition date

Disposal date

Cost base

Disposal proceeds

Market value just before 1 July 2027

Required because this holding spans the transition — the Act treats it as a deemed sale and reacquisition at market value on that date (s112-155). Enter your best estimate; this engine never guesses it for you.

Your Situation

Other taxable income

Tax year

Residency

Entity type

I receive an income-support payment (Age Pension, JobSeeker, Carer Payment, DVA pension, FTB, etc.) — exempts the 30% minimum tax top-up (s119-15)

Elections (Optional)

Asset type

Assumed annual inflation from today

CPI hasn't been published yet for a future quarter, so this figure projects forward from the latest known index. Change it to stress-test the result — it's an assumption, not a forecast.

Calculating…

Resolving CPI index values for this disposal.

How to Use This Calculator

1Enter when you acquired and plan to (or did) dispose of the asset
2Enter the cost base and disposal proceeds
3If the disposal spans 1 July 2027, enter the asset's market value just before that date — the law treats it as a deemed sale and reacquisition
4Add your other taxable income, tax year and residency
5See the taxable gain and tax payable compared old law vs new law

What's Changing on 1 July 2027?

The 50% CGT discount is abolished for individuals, trusts and partnerships. It's replaced with CPI cost-base indexation (the pre-1999 method) plus a 30% minimum tax rate on net capital gains — an alternative-minimum top-up, not a flat substitute rate.

A gain that spans the change is apportioned: the Act treats it as a deemed sale just before 1 July 2027 and a deemed reacquisition just after, at market value. The pre-portion keeps the 50% discount; the post-portion is indexed.

Income-support recipients, including Age Pensioners, are exempt from the 30% minimum tax top-up for the whole income year they receive a qualifying payment.

Key Mechanics

CPI indexation: The cost base grows with inflation from the expenditure quarter to the disposal quarter, so only the real (above-inflation) gain is taxed at the margin — same idea as the pre-1999 indexation method.
30% minimum tax: A top-up, assessed separately, that applies only if ordinary marginal-rate tax on the gain comes in under 30% of it. It is not a flat 30% rate on every gain.
Deemed disposal: For anything held across 1 July 2027, the Act resets the cost base to market value on that date rather than pro-rating one single gain.
Pre-1985 assets: Lose their blanket exemption for growth after 1 July 2027 — the earlier gain stays exempt, later growth is taxable, via the same deemed-disposal mechanism.

Using This Calculator

•If you don't know the market value at commencement, use a recent valuation or a conservative estimate and note the assumption
•Try the assumed inflation rate at both a low and high setting to see how sensitive the result is
•Compare against the plain Capital Gains Tax Calculator for a disposal that happens entirely before 1 July 2027
•This is general information, not a recommendation to buy, hold or sell any asset

Frequently Asked Questions

Official Sources

ATO rates checked against official sources — verified 2 August 2026

Estimates only. Not financial or tax advice. Full disclaimer for your rights and our limitations of liability.

Rates and thresholds last updated for the 2026–27 financial year.

Related Tools

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CGT under today's rules, before 1 July 2027

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2027 Tax Changes Hub

Everything changing on 1 July 2027, in one place

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