Estimate the capital gain on selling shares, property or crypto — the five-element cost base, the 50% discount for assets held more than 12 months, and the marginal-rate tax the net gain adds on top of your other income, from the current ATO rules.
Educational tool. Not financial advice.
Sale price (capital proceeds)
What you sold the asset for — the proceeds from the disposal.
$
Purchase price (what you paid)
Element 1 of the cost base — the money paid to acquire the asset.
$
Buying & selling costs (optional)
Brokerage, stamp duty, legal, conveyancing, agent commission — incidental costs to acquire and dispose.
$
Capital improvement costs (optional)
Capital spending that improved the asset's value (e.g. a renovation).
$
Purchase contract date
The CONTRACT date you bought (not settlement), as YYYY-MM-DD. The 12-month discount test runs contract-to-contract.
Sale contract date
The CONTRACT date you sold (not settlement), as YYYY-MM-DD.
Your other taxable income for the year (optional)
Salary and other taxable income. The net gain is taxed at your marginal rate on top of this — never in isolation.
$
Do you have a HELP / study loan?
Yes — I have an outstanding HECS-HELP or other study and training loan.
Wash-sale check (optional)
If you sold at a loss and plan to buy back the same or a substantially identical asset, the ATO's wash-sale rule may apply. This is information about the rule, not a clearance — there is no fixed time window.
Did this sale crystallise a capital loss?
Yes — I sold the asset for less than its reduced cost base.
Do you intend to reacquire the same (or a substantially identical) asset?
Yes — I plan to buy back the same or a substantially identical asset.
Was the dominant purpose of selling to generate the tax loss?
Yes — generating the tax loss was the main reason for selling.