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Crypto prices rise fast, then fall just as fast. At some point, many Australian investors will sell a coin for less than they paid for it. That sale has a tax side worth understanding.
This guide explains what a capital loss is, how it can be used, when it counts as realised, a worked example, along with the records that back it up. Everything here is general educational information only. It describes concepts, with no tax, financial or legal advice, so it says nothing about any reader’s own obligations. Australian crypto exchanges such as Swyftx provide transaction reports with a Koinly integration, which can help investors keep their records in order.
What Is a Capital Loss?
In plain terms, a capital loss happens when crypto is sold or disposed of for less than its cost base. The cost base is broadly what the asset cost to acquire, including certain costs such as transaction fees.
A loss only counts once the asset leaves the investor’s hands. A coin bought at $1,000 that later sits at $600 shows a paper loss on screen. Until it is sold or otherwise disposed of, that dip is unrealised. For tax purposes, an unrealised dip creates no capital loss.
The Australian Taxation Office publishes detailed guidance on crypto assets. That guidance is the source to check any point in this article against, since the rules can change over time.
How Capital Losses Can Be Used
According to the ATO, capital losses can be used to offset capital gains from the current financial year. A loss on one coin can reduce a gain made on another asset in the same year.
Unused losses can be carried forward. The ATO notes that they can offset capital gains in future financial years, with no need to use them straight away.
There is one firm limit. According to the ATO, capital losses have no use against other income like salary or wages. A crypto loss stays inside the capital gains side of a tax return.
Rules differ across situations. An investor who trades as a business, for example, may fall under a separate set of rules altogether. Each person’s circumstances shape how these concepts apply.
Worked Example (Hypothetical)
This example is an illustration only, with made-up figures. It shows the general idea of netting a gain against a loss, with no claim about any real tax outcome.
In one financial year, an investor makes two sales.
Sale One: ETH with a cost base of $4,000, fees included, sells for $6,000. That creates a capital gain of $2,000.
Sale Two: A smaller coin with a cost base of $3,000 sells for $1,800. That creates a capital loss of $1,200.
The loss comes off the gain. Taking $1,200 away from $2,000 leaves a net capital gain of $800 for the year.
Now picture the second sale with a larger loss of $2,500. The loss would wipe out the $2,000 gain, leaving $500 of unused loss. That $500 could then carry forward to a later year. Other rules, such as the CGT discount on assets held for over 12 months, can also affect the final figure.
When Is a Loss Actually “Realised”?
A loss becomes realised through a disposal. The familiar case is a sale of crypto for Australian dollars.
Swaps count too. The ATO lists the exchange of one crypto asset for another as a disposal. A swap from one coin into another can realise a gain or a loss on the coin given up, even with no AUD involved.
Holding through a dip works another way. A coin that falls 50% while it sits in a wallet has had no disposal. On paper the value has dropped, yet no realised loss exists until a disposal takes place.
Swyftx swap orders trade one asset for another in a single transaction. For record purposes, that single swap still counts as a disposal of the first asset.
Things to Be Careful About
The ATO pays close attention to wash sales. It describes these as arrangements undertaken for the artificial purpose of generating a tax benefit, such as a sale just before 30 June with a quick buyback of the same asset soon after. The ATO says it uses data from crypto exchanges to spot this pattern, with a rejected capital loss as a possible result.
Lost or inaccessible crypto has its own set of rules. A lost private key or stolen coins may support a capital loss in some cases, with strict evidence of ownership required. The ATO’s page on the loss or theft of crypto assets sets out the details.
Every transaction record matters, including small ones. A tiny swap or a minor fee still forms part of the full picture.
Records That Support a Loss
The ATO stresses accurate records for each crypto asset. Useful details include:
The date of each purchase or sale
The amount of crypto involved
The AUD value at purchase, along with the AUD value at sale
Any fees paid on each transaction
Swyftx transaction reports show order history, trade values, deposits, withdrawals, along with AUD equivalent values. These reports download in PDF or CSV format.
Swyftx also connects with Koinly, a third-party crypto tax software platform. Swyftx itself issues no tax reports or profit/loss reports. Tools such as Koinly can pull in transaction data to help organise those calculations.
Common Mistakes to Avoid
A few errors show up again with crypto losses.
Forgotten Fees: Fees form part of the cost base or reduce sale proceeds. Leaving them out can distort the gain or loss figure.
Ignored Swaps: A coin-to-coin swap is a disposal. Treating it as a non-event leaves a gap in the records.
Missing Platforms: Crypto held on other exchanges or in private wallets belongs in the same picture. A record from one platform alone may tell only part of the story.
Last-Minute Records: Records pieced together in late June tend to have gaps. A monthly download of transaction reports keeps the job small.
Conclusion
Losses are a normal part of investing. A clear grasp of how the ATO treats them helps investors plan their records well ahead of tax time. Good record keeping makes every later step simpler, from a tax return to a conversation with an adviser. Platforms like Swyftx support that work through transaction reports, a Koinly integration along with Swyftx Learn. For advice on a personal situation, a registered tax agent or the ATO is the right place to turn.
