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CGT Reform Comparison Calculator
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?
Calculator
CGT Reform Comparison Calculator (2026)
Compare current Australian property CGT settings with an indexed-cost-base reform scenario and 30% minimum-tax proxy.
Formula
Current CGT = max(gain, 0) x 50% x marginal rate; Reform CGT = max(indexed gain x marginal rate, gross gain x 30%)Estimate updates below
Gross Capital Gain$200,000.00
Step 1
Inputs
More tax under reform$23,000
Property numbers
Stamp duty, conveyancing and acquisition costs.
Agent commission, legal fees and marketing.
Eligible capital works added to cost base.
Reform assumptions
This is a scenario model for policy comparison, not tax advice. The reform calculation uses the site's reform article framing: CPI-indexed cost base with a 30% minimum-tax proxy.
Step 02 · Resultsinstant
Gross Capital Gain
$200,000.00
Current-Rule CGT
$37,000.00
Indexed Cost Base
$918,408.31
Reform-Rule CGT
$60,000.00
Tax Difference
$23,000.00
After-Tax Profit Difference
-$23,000.00
Visualisation
Current rule
$37,000
50% discount method
Reform rule
$60,000
Indexed cost base plus minimum-tax check
Difference
$23,000
Reform minus current rule
Next steps
Run the related numbers
FAQ
