Calculator guide
What this CGT comparison answers
Compare the current individual CGT discount method against an indexed-cost-base reform scenario, then see how the tax difference changes after CPI and holding period assumptions.
- Would indexation cost more or less than the 50% discount?
- How does holding period affect the result?
- What happens if the 30% minimum-tax proxy applies?
CGT Reform Comparison Calculator (2026)
Compare current Australian property CGT settings with an indexed-cost-base reform scenario and 30% minimum-tax proxy.
Former method = gain x 50% x marginal rate; simplified post-2027 method = max(indexed gain x marginal rate, indexed gain x 30%)Inputs
Property numbers
Stamp duty, conveyancing and acquisition costs.
Agent commission, legal fees and marketing.
Eligible capital works added to cost base.
Reform assumptions
$200,000.00
Current-Rule CGT
$37,000.00
Indexed Cost Base
$918,408.31
Post-2027 simplified CGT
$2,438.93
Tax Difference
-$34,561.07
After-Tax Profit Difference
$34,561.07
Current rule
$37,000
50% discount method
Reform rule
$2,439
Indexed cost base plus minimum-tax check
Difference
-$34,561
Reform minus current rule
Next steps
