The CGT discount can reduce an eligible capital gain included in the calculation of taxable income. It does not mean that the final tax payable on a business sale is automatically halved.
Eligibility depends on the taxpayer, asset, ownership period, residency and other rules. Companies cannot use the general CGT discount. The interaction with capital losses and small business concessions also matters.
Check the ATO guidance on CGT discounts and obtain tax advice on the proposed transaction before relying on a discount.