A1: What is capital gains tax and what rate of tax do you pay?
CGT is the tax you pay on any capital gain you include in your tax return. It isn't a separate tax, merely a component of your income tax. You are taxed on your net capital gain at your marginal tax rate.
To work out your net capital gain:
- take your total capital gains for the year
- subtract your total capital losses for the year and any unapplied net capital losses from earlier years
- subtract any CGT discount and small business CGT concessions to which you're entitled.
If your total capital losses for the year are more than your total capital gains, the difference is your net capital loss for the year. It can be carried forward to later income years to be deducted from future capital gains. You can't deduct capital losses or a net capital loss from your income. There is no time limit on how long you can carry forward a net capital loss. You apply your net capital losses in the order that you made them. For more information on how to apply your capital losses, see Step 8 of Part B Sale of shares or units, and Step 4 of Part C Distributions from managed funds.
You make a capital gain or a capital loss if a CGT event happens. The disposal of an asset is an example of a CGT event. You can also make a capital gain if a managed fund or other trust distributes a capital gain to you.
You write the total of your current income year capital gains in your tax return and your net capital gain in your tax return.
A2: Worldwide obligations
Australian residents can make a capital gain or capital loss if a CGT event happens to any of their assets anywhere in the world.
A3: How to meet your CGT obligations
To meet your CGT obligations, follow these 3 main steps:
- Step 1 Decide whether a CGT event has happened
- Step 2 Work out the time of the CGT event
- Step 3 Calculate your capital gain or capital loss
Keep your records
You need to keep good records of any assets you have bought or sold. This will help you to correctly work out the amount of capital gain or capital loss you have made when a CGT event happens. You must keep these records for 5 years after the CGT event has happened.
You should also keep records relevant to a net capital loss that you carry forward as part of unapplied net capital losses. You may be able to apply this net capital loss against a capital gain in a later income year.
Step 1 Decide whether a CGT event has happened
CGT events are the different types of transactions or events that may result in a capital gain or capital loss. A CGT event happens if you sell (or otherwise disposed of) your shares or units or other assets during 2024–25.
Examples of other CGT events that can happen to shares or units include:
- when a company makes a payment other than a dividend to you as a shareholder when a trust or fund makes a non-assessable payment to you as a unit holder
- where you have an annual cost base reduction that exceeds the cost base of your interest in an attribution managed investment trust (AMIT)
- when a liquidator or administrator declares that shares or financial instruments relating to a company are worthless
- when shares in a company are cancelled because the company is wound up.
In some cases, although CGT events may happen to certain assets, any capital gains or capital losses from them are generally disregarded (for example, assets acquired before 20 September 1985).
For more information on CGT events, see Guide to capital gains tax 2025.
If a managed fund makes a capital gain and distributes part of that gain to you, you're treated as if you make a capital gain from a CGT event.
If you don't make a capital gain or capital loss from a CGT event during 2024–25, you don't need to include anything in your tax return.
If you did make a capital gain or capital loss from a CGT event during 2024–25, you need to complete the relevant section in your tax return. If the CGT event happens to your shares or units and the event is covered in this guide (see About the personal investors guide to capital gains tax), read on. Otherwise, see Guide to capital gains tax 2025.
Step 2 Work out the time of the CGT event
The timing of a CGT event is important because it determines which income year you show your capital gain or capital loss in. If you sell or otherwise dispose of an asset to someone else, the CGT event happens when you enter into the contract of sale. If there is no contract, the CGT event happens when you stop being the asset’s owner.
If you receive a distribution of a capital gain from a managed fund, you are considered to have made the capital gain in the income year shown on your statement from the managed fund.
Step 3 Calculate your capital gain or capital loss
There are 3 ways of calculating your capital gain or capital loss from the sale of your shares or units:
- the indexation method
- the discount method
- the ‘other’ method.
The indexation method allows you to increase the amount that your asset cost (the cost base) by applying an indexation factor that is based on increases in CPI up to September 1999.
The indexation method can only be applied to assets that you acquire before 11:45 am AEST on 21 September 1999.
If you own the shares or units for at least 12 months, use the discount method. The discount method allows you to reduce the discount capital gains by 50%. For more information on when to apply the discount, see Table 1.
For assets that qualify for both the indexation and discount methods, you can choose the method that gives you the better result. You don't have to choose the same method for all your shares or units even if they are in the same company or fund. You must offset capital losses against capital gains before you apply the CGT discount, so your choice may also depend on the amount of capital losses that you have available, see example 18.
You must use the ‘other’ method for any shares or units you buy and sell within 12 months.
To calculate your capital gain, you subtract your cost base from what you receive (your capital proceeds).
You make a capital loss from the sale of your shares or units if their reduced cost base is greater than your capital proceeds. You can't index amounts included in your reduced cost base.
If your capital proceeds are less than your cost base but more than your reduced cost base there is neither a capital gain or loss.
If you receive a distribution of a capital gain from a managed fund, Part C of this guide explains how you calculate the amount of that capital gain. You must use the same method as that chosen by the fund.
Table 1 explains and compares the 3 methods of calculating your capital gain.
|
Method |
Indexation method |
Discount method |
‘Other’ method |
|---|---|---|---|
|
Description of the method |
Use to increase the cost base by applying an indexation factor based on CPI. |
Use to halve your capital gain. |
A basic method to subtract the cost base from the capital proceeds. |
|
When to use the method |
Use for shares or units held for 12 months or more, |
Use for shares or units held for 12 months or more, if this method produces a better result for you than the indexation method. |
Use for shares or units if you have bought and sold them within 12 months (that is, when the indexation and discount methods don't apply). |
|
How to calculate your capital gain using the method |
Apply the relevant indexation factors (see CPI table), then subtract the indexed cost base from the capital proceeds (see the worked examples in Chapter B2). |
Subtract the cost base from the capital proceeds, deduct any capital losses, then divide by 2 (see the worked examples in Chapter B2). |
Subtract the cost base from the capital proceeds (see the worked examples in Chapter B2). |
A4: Exemptions and rollovers
There may be an exemption that allows you to disregard your capital gain or capital loss. For example, generally you disregard any capital gain or capital loss associated with any pre-CGT assets (assets you acquire before 20 September 1985).
There may be a rollover that allows you to defer your capital gain. For example, if a company in which you hold shares is taken over or merges with another company, and you're required to sell your shares for cash, you have either a capital gain or capital loss. If you exchange your existing shares for shares in the acquiring company, you may be able to defer or roll over some or all of your capital gain (but not a capital loss) until a later CGT event happens to your replacement shares. This is known as scrip-for-scrip rollover.
Another example of a rollover is when you transfer a CGT asset to your former spouse (married or de facto) because of a court order after a marriage or relationship breakdown. In this case, you don't make a capital gain or capital loss on the transfer. Your former spouse may make a capital gain or capital loss when a later CGT event happens to the asset. For more information, see Relationship breakdown and capital gains tax.
A rollover is also available for some demergers of corporate or trust groups.
Assets you didn't buy and assets other than shares and units
If you sell assets other than shares and units or sell assets from a deceased estate this income year, see Guide to capital gains tax 2025 to find out how to calculate and report your CGT obligations.
A5: Records you need to keep
Most of the records needed to calculate your capital gain or capital loss when you dispose of shares in companies or units in unit trusts (including managed funds) is given to you by the company. The unit trust manager or your stockbroker may also supply these records. It is important that you keep everything they give you about your shares and units.
These records will generally provide the following important information:
- the date you bought the shares or units
- the amount paid to buy the shares or units
- details of any non-assessable payments made to you during the time you owned the shares or units
- the date and amount of any calls if shares were partly paid
- the sale price if you sold them
- any commissions paid to brokers when you bought or sold them
- any merger or demerger of your share and unit trust.
Continue to: Part B: Sale of shares or units
Return to: General guidance