Free Australian CGT calculator
Compare CGT outcomes before you plan your exit.
Estimate and compare transitional capital gains tax outcomes, then pressure-test sale price, inflation and ownership assumptions in plain English.
Market value
The difference exceeds the $25,000 materiality threshold. A supportable transition-date valuation warrants priority.
Method sensitivity
Calculation audit trail
| Calculation | Market value | Treasury proxy |
|---|---|---|
| Transition value | $1,600,000 | $1,479,983 |
| Pre-transition gain | $1,000,000 | $879,983 |
| Tax on pre-transition gain | $235,000 | $206,796 |
| Indexed transition base | $1,810,345 | $1,674,549 |
| Post-transition real gain | $189,655 | $325,451 |
| Estimated total tax | $324,138 | $359,758 |
Inflation × sale price heat map
Green values favour the market valuation. Red values favour the illustrative proxy.
Ownership scenarios
Screening comparison only. Eligibility, distributions, losses, asset ownership, super caps and anti-avoidance rules can materially change outcomes.
Adviser summary
Joe Bloggs · Private business
Prepared from the live scenario assumptions.
Finding
Under the current assumptions, the market value method produces the lower estimated tax outcome. The indicative difference is $35,620 and the transition-date value is $1,600,000.
Priority actions
- Confirm enacted law, ATO guidance and asset eligibility.
- Obtain a supportable transition-date valuation if the difference is material.
- Build taxpayer-specific advice including losses, concessions and distributions.
- Retain valuation evidence and adviser sign-off with transaction records.
Transparent by design
Every result traces back to a visible assumption.
The model splits gains at 1 July 2027, retains the entered pre-transition discount, indexes the transition value for inflation and applies the higher of the effective and minimum post-transition rates. The geometric proxy is illustrative—not a representation of final ATO methodology.
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This is scenario planning—not tax, legal, accounting or financial advice. It does not model capital losses, small-business concessions, Medicare variations, distributions, franking, Division 7A, superannuation caps or anti-avoidance rules. Verify enacted law and your circumstances with appropriately qualified Australian advisers.