Australia CGT Discount: Eligibility, Order of Application, and Penalties

The Australia CGT discount lets individuals and trusts cut a capital gain in half before it’s added to their taxable income, provided the asset was held for at least 12 months before the CGT event. Complying superannuation funds get a smaller discount of 33.33%. Companies get nothing. The concession sits in Division 115 of the Income Tax Assessment Act 1997 and is administered by the Australian Taxation Office.1Federal Register of Legislation. Income Tax Assessment Act 1997

Used properly, it’s the single most valuable concession most investors will ever touch. Used carelessly, it’s the source of some of the most common capital gains errors the ATO catches on review.

Who Qualifies for the Discount

Three things have to line up.

The first is the entity. Individuals and trusts get the 50% discount. Complying superannuation funds get 33.33%. Companies are excluded from the discount entirely and pay tax on the full gain at the corporate rate.2Australian Taxation Office. CGT Discount

The second is the holding period. You must have owned the asset for at least 12 months before the CGT event.1Federal Register of Legislation. Income Tax Assessment Act 1997 Sell a day short of the anniversary and the entire gain is taxable without any reduction. If an asset is approaching that 12-month mark, waiting the extra days to exchange contracts can halve the taxable amount. The trigger date for a sale is the contract date, not settlement.3Australian Taxation Office. Taxation Determination TD 2004/40

The third is residency. Since 8 May 2012, foreign and temporary residents cannot claim the discount on gains that accrued after that date.4The Treasury. Explanatory Material – Removal of Capital Gains Tax Discount for Foreign Resident Individuals If you were an Australian resident for part of the ownership period and a foreign resident for the rest, the gain has to be apportioned and the discount applied only to the portion that accrued while you were a resident.

How to Apply the Discount in the Right Order

The order of calculation is prescribed and it matters. Applying the discount before subtracting losses will overstate your taxable gain, which sounds like your problem but is actually the ATO’s favourite kind of error to correct. The sequence runs:5Australian Taxation Office. Step 8 Applying the CGT Discount

  1. Add up all capital gains for the year.
  2. Subtract capital losses made in the current year.
  3. Subtract net capital losses carried forward from earlier years.
  4. Apply the discount (50% or 33.33%) to any remaining gains that qualify.
  5. Apply any small business CGT concessions if eligible.

Losses always come off before the discount does. That’s the point people get wrong.

There’s a related choice worth knowing about. When you have both discount-eligible and non-discount gains in the same year, you decide which gains your losses are applied against first. Applying losses to non-discount gains first preserves more of the discount-eligible gains, which are then halved. The ATO doesn’t dictate which gains absorb the losses, so this election is worth thinking through.

Capital losses themselves can only be offset against capital gains, never against salary or business income. Excess losses become a net capital loss that carries forward indefinitely.6Australian Taxation Office. Using Capital Losses to Reduce Capital Gains There’s no expiry.

Once the discount has been applied and any concessions used, the net capital gain is added to your other assessable income and taxed at your marginal rate, from 0% up to 45%.7Australian Taxation Office. Tax Rates – Australian Resident

The Indexation Alternative for Pre-1999 Assets

If you acquired an asset before 11:45 am (Canberra time) on 21 September 1999 and held it for at least 12 months, you get a choice between the discount method and the indexation method.8Australian Taxation Office. The Indexation Method

Indexation adjusts the cost base upward using the Consumer Price Index to account for inflation between acquisition and September 1999. The index is frozen at the September 1999 quarter (CPI of 123.4). You divide 123.4 by the CPI for the quarter in which each cost base element was incurred, then multiply by that expenditure. The bigger the inflation over the holding period up to 1999, the larger the cost base uplift and the smaller the gain.

For individuals and trusts, this is genuinely a choice: pick whichever produces the lower taxable gain. Companies are the exception. They can’t use the discount at all, so for eligible pre-1999 assets they must use indexation.8Australian Taxation Office. The Indexation Method

For assets acquired after 21 September 1999, indexation isn’t available. The discount is the only concession on the table.

When the Discount Doesn’t Come Into It

Some gains never reach the discount step because the asset is exempt or the transaction sits outside the CGT net.

Assets acquired before 20 September 1985 are generally exempt from CGT entirely, so no discount question arises. Major improvements made after that date can themselves be subject to CGT even where the underlying asset is pre-CGT.

The family home is exempt under Section 118-110, provided it was your main residence for the whole ownership period and sits on no more than two hectares. Partial exemptions apply where the home produced income or wasn’t your main residence for part of the period. Foreign residents selling Australian property after 30 June 2020 generally cannot claim the main residence exemption at all, with a narrow “life events” exception.9Australian Taxation Office. Main Residence Exemption for Foreign Residents

Personal use assets acquired for $10,000 or less are exempt, as are collectibles acquired for $500 or less.10Australian Taxation Office. List of CGT Assets and Exemptions Cars and motorcycles are exempt regardless of value. Where an exemption applies, the discount is irrelevant. Where a partial exemption applies, the discount runs on whatever taxable portion remains, in the usual order.

Stacking the Discount With Small Business Concessions

For small business owners selling active business assets, the discount is only the first layer. Four further concessions can stack on top.

Eligibility starts with the basic conditions: either qualify as a CGT small business entity with aggregated annual turnover under $2 million, or satisfy the maximum net asset value test (net CGT assets of $6 million or less across you and connected entities).11Australian Taxation Office. CGT Concessions Eligibility Overview12Australian Taxation Office. Maximum Net Asset Value Test The asset itself must be an active asset used in carrying on the business.

The four concessions are:

  • The 15-year exemption. If you’ve continuously owned the asset for at least 15 years, you’re 55 or older and retiring (or permanently incapacitated), the entire gain is disregarded, and you don’t even have to apply capital losses first.13Australian Taxation Office. Small Business 15-Year Exemption
  • The 50% active asset reduction. Applied automatically after the standard CGT discount, this cuts the remaining gain by a further 50%. An individual who qualifies for both ends up with only 25% of the original gain in their taxable income.14Australian Taxation Office. Small Business 50% Active Asset Reduction
  • The retirement exemption. Gains from active assets can be disregarded up to a lifetime cap of $500,000 per individual. If you’re under 55, the exempt amount must be paid into a complying super fund.15Australian Taxation Office. Small Business Retirement Exemption
  • The rollover. You can defer the gain by acquiring a replacement active asset or improving an existing one within the required timeframe.

These can be combined. A business owner who has run the business for decades and meets the conditions can, in some cases, walk away from a sale with the entire gain removed from tax. The 15-year exemption is the most complete but the hardest to qualify for. The 50% active asset reduction is the most commonly used because it applies automatically once eligibility is established, and it sits on top of the standard discount rather than replacing it.

Getting the Discount Wrong: Penalties and Interest

The ATO applies a general interest charge on any tax shortfall from the date it should have been paid, running around 10.65% to 10.96% annually as of early 2026 and compounding daily.16Australian Taxation Office. General Interest Charge (GIC) Rates On a large capital gain, the interest alone accumulates fast.

On top of interest, administrative penalties apply to false or misleading statements as a percentage of the shortfall:17Australian Taxation Office. Penalties for Making False or Misleading Statements

  • Failure to take reasonable care: 25% of the shortfall.
  • Recklessness: 50%.
  • Intentional disregard: 75%.

Penalties can be increased by 20% for repeat conduct or obstruction. Voluntary disclosure before the ATO makes contact can reduce the penalty significantly, in some cases to nothing. A registered tax agent who made the error can provide a safe harbour, provided you gave the agent all relevant information.17Australian Taxation Office. Penalties for Making False or Misleading Statements

The recurring CGT discount errors the ATO picks up are the same ones every year: applying the discount before subtracting losses, claiming the discount on an asset held for less than 12 months, and forgetting to apportion the gain when residency changed mid-holding. Most fall into the “failure to take reasonable care” band rather than intentional disregard, but 25% of a shortfall on a property sale is a large number, and the interest keeps running until it’s paid.

Keep the paperwork. For most CGT assets, the ATO requires records for the whole ownership period plus five years after disposal.18Australian Taxation Office. Records to Keep Longer Than Five Years If you’re carrying a net capital loss forward, records for the loss year have to survive until the review period ends for the year the loss is finally used.19Australian Taxation Office. Keeping Records Purchase contracts, settlement statements, receipts for improvements, and records of incidental costs are what proves the cost base that the discount is applied to. Without them, the discount is worth what you can substantiate, not what you actually paid.