Not every investment delivers a profit, but a capital loss tax deduction can help reduce your capital gains tax (CGT) liability. In Australia, capital losses can only offset capital gains and cannot be deducted from other income such as salary, wages, or rental income.
If your losses are greater than your gains in a financial year, you can carry them forward indefinitely to offset future capital gains.
This guide explains what capital gains and capital losses are, how they apply to CGT assets, and how you can use them to improve your tax position while complying with Australian Taxation Office (ATO) rules. Capital Gains Tax (CGT) is imposed on profits made from selling or exchanging a capital asset in Australia.
What Is a Capital Loss?
A capital loss occurs when you sell a capital asset for less than its original purchase price plus incidental costs such as stamp duty, legal fees, and other acquisition expenses. This applies to assets acquired for investment purposes, including investment properties, shares, managed funds, inherited assets, and other Australian assets.
It is important to distinguish a capital loss from a tax loss or revenue loss. A revenue loss arises from business or rental expenses and can usually be claimed against other income. A capital loss, however, can only be used to reduce a net capital gain and cannot be deducted from other income such as wages or business income.
If you do not make a capital gain in the same income year, the ATO allows you to carry forward current year capital losses to offset capital gains in future years. This means the capital loss is not wasted and can still bring you a tax benefit later. If you make a net capital loss, you won’t need to pay Capital Gains Tax for that financial year.
How Capital Losses Work With CGT
Capital gains tax (CGT) is part of your income tax assessment and is not a separate tax. When you make a capital gain on selling assets, the taxable capital gain is added to your assessable income for tax purposes. CGT is treated as part of your income tax assessment, calculated at the individual’s marginal tax rate.
A capital loss reduces the net capital gain. If you make both a capital gain and a capital loss in the same financial year, you must apply the capital losses first to reduce your net capital gain before applying any CGT discount. For example, if you make a $30,000 capital gain on shares and a $15,000 capital loss on property, only the $15,000 net capital gain is subject to tax. Capital losses can offset capital gains from selling other assets within the same financial year to reduce overall capital gains tax liability.
If your capital losses are greater than your capital gains in the same income year, you cannot use them to offset salary, wages, or other income. However, you can carry the unused losses forward indefinitely to reduce future capital gains.
Carrying Forward Capital Losses
A key benefit of a capital loss tax deduction is that if the capital loss incurred exceeds your capital gains in the current financial year, you can carry forward unused losses to future income years. This makes capital losses a valuable tax tool even when losses outweigh gains.
There is no time limit on carrying forward capital losses, but you must keep accurate records of your cost base, capital proceeds, and any incidental costs related to assets acquired and sold. The Australian Taxation Office may require evidence of these details before you can claim the capital loss deduction.
For example, if you make a $20,000 capital loss on shares but only $10,000 in capital gains from property sales, you can offset the $10,000 immediately. The remaining $10,000 capital loss can then be carried forward to reduce capital gains in subsequent years.
Common Scenarios Where Capital Loss Deduction Applies
Property investors
Selling an investment property at a loss results in a capital loss. While this capital loss cannot reduce rental income or other income, it can offset future capital gains from selling other properties or shares. Losses on your primary residence or family home are generally disregarded under the main residence exemption unless the property was used to earn income. Your main residence is typically exempt from CGT if specific eligibility criteria are met.
Share investors
If you sell shares or managed fund units for less than their original purchase price, the shortfall is a capital loss. This capital loss can reduce tax on capital gains from other assets.
Mixed portfolios
If you hold a diversified portfolio of property and shares, capital losses from one asset class can offset capital gains from another. For example, a $15,000 capital loss on shares could reduce tax on a $30,000 capital gain from property.
These examples demonstrate that while a capital loss may feel negative, it can still improve your tax position by reducing your net capital gain and the amount of tax you pay.
Key Rules and ATO Considerations
Capital losses cannot offset other income
Capital losses cannot be deducted from wages, salary, business income, or rental income. They only reduce capital gains for tax purposes.
Losses must be applied in the same financial year first
If you have capital gains and capital losses in the same income year, you must apply the losses first before carrying forward any unused losses.
Record-keeping is essential
Maintain evidence of your original purchase price, capital proceeds from sale, and incidental costs such as stamp duty, legal fees, and improvements. These records are necessary to substantiate your capital loss claims in current and future income years.
CGT discount applies after losses
If you hold an asset for more than 12 months, you may be eligible for the 50% CGT discount on the net capital gain after applying capital losses.
Other CGT events and exemptions
Be aware that certain CGT events, such as disposals of personal use assets, inherited assets, or assets exempted under the main residence exemption, may affect your capital gains or losses differently. Foreign residents may have additional considerations regarding Australian assets and capital gains tax.
Following these rules helps you comply with tax obligations and maximise your capital loss tax deduction benefits.
Frequently Asked Questions
Can I claim a capital loss on my tax return?
Yes. Capital losses must be reported in your tax return and can be used to offset capital gains in the same income year or carried forward to future income years.
Do capital losses reduce taxable income?
No. Capital losses reduce your net capital gain but do not reduce salary, wages, or other income.
How long can I carry forward capital losses in Australia?
Capital losses can be carried forward indefinitely, provided you keep accurate records of the capital gains tax events and associated transactions.
Can I offset a capital loss against salary or rent?
No. Capital losses can only offset capital gains and cannot be deducted from other income sources.
What is the difference between a capital loss and a revenue loss?
A capital loss arises from selling a capital asset for less than its tax value or original purchase price plus incidental costs. A revenue loss relates to business or rental expenses and can reduce assessable income.
Capital Loss Tax Deductions Final Thoughts
A capital loss does not have to mean wasted money. When managed well, it can become a strategic tax advantage. By offsetting capital gains or carrying losses forward indefinitely, you can minimise capital gains tax and improve your long-term financial outcomes.
The key is to keep good records and understand the tax implications of capital gains tax events and CGT assets. While capital losses cannot reduce other income, they remain a valuable tool to reduce taxable capital gains.
If you are unsure, seek tax advice from a registered tax agent or accountant holding an Australian credit licence. They can help you comply with Australian Taxation Office rules and make the most of your capital loss tax deduction opportunities. Get in touch with our experts at Duo Tax today for tailored advice and start maximising your returns.
