Calculators

CGT reform calculator — 2026-27 Budget.

Model the proposed reforms: CPI cost-base indexation and a 30% minimum tax on real gains, versus the current 50% discount.

These calculators model the proposed CGT reforms announced in the 2026-27 Federal Budget. These changes have not yet passed Parliament and are subject to amendment. The reform proposes replacing the 50% CGT discount with CPI cost-base indexation and a 30% minimum tax on real gains, effective 1 July 2027 (if passed).

Old rules vs new rules (if passed)

Compare CGT across entity types under old and proposed new rules. See which holding structure gives the best outcome under each regime.

Holding Entity

Purchase Price + Costs ($) cost base

Expected Sale Price ($) or auto-fill from growth below

Years Held

Annual Growth Rate (%) optional — auto-calculates sale price

Marginal Tax Rate

Assumed Annual CPI (%) Treasury default: 2.5

Old Rules Tax

New Rules Tax

Difference

Indexation Uplift

Item	Old Rules	Proposed New

This calculator is for general educational purposes only and does not constitute financial or tax advice. These are proposed changes that have not yet passed Parliament. Consult a qualified tax professional for advice on your specific situation.

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