CRYPTO TAX & REGULATIONS

How to Report Crypto Losses for Tax Purposes in Australia

Losing money in crypto is never the outcome anyone plans for. But if losses have occurred, reporting them correctly to the ATO is not just a compliance obligation. It is also a genuine financial opportunity. Capital losses on crypto can be used to reduce your overall tax liability in ways that many Australian investors either don’t know about or don’t take full advantage of.

This resource explains exactly how crypto losses work under Australian tax law, how to report them correctly, what you can and can’t offset them against, and the specific scenarios that trip investors up most frequently.

The Foundation: Crypto Losses Are Capital Losses

Under Australian tax law, cryptocurrency is treated as a CGT asset. When you dispose of a crypto asset for less than its cost base, you realise a capital loss. That capital loss has real value in the tax system because it can be used to reduce your capital gains, which in turn reduces the CGT you owe.

A disposal that triggers a capital loss includes selling crypto for AUD at a lower price than you paid, trading one cryptocurrency for another where the disposed asset has dropped in value relative to its cost base, and in certain circumstances losing access to crypto permanently through a hack, scam, or lost wallet. Each of these scenarios is covered in detail below.

The broader CGT framework that applies to Australian crypto investors is covered comprehensively in our resources on capital gains tax for cryptocurrency in Australia, cryptocurrency tax Australia, and ATO crypto rules Australia. This resource focuses specifically on losses and how to handle them.

How Capital Losses Work: The Offset Rules

Capital losses cannot be used to offset ordinary income. This is one of the most important and most frequently misunderstood aspects of the Australian CGT system as it applies to crypto.

If you earn $100,000 AUD from your job and realise $20,000 AUD in crypto capital losses in the same financial year, you cannot reduce your employment income by $20,000 AUD. Capital losses can only be offset against capital gains.

The offset rules work as follows. In the year the capital loss is realised, it is first applied against any capital gains realised in the same year. If your capital gains exceed your capital losses, the net gain is what gets included in your assessable income, with the CGT discount applied if applicable. If your capital losses exceed your capital gains in a given year, the excess loss is carried forward to future years. There is no time limit on how long capital losses can be carried forward. They remain available indefinitely until they are fully offset against future capital gains.

This carry-forward mechanism is genuinely valuable for long-term crypto investors. Losses realised in a bear market can be banked and applied against gains realised in a future bull market, reducing the CGT liability on those future gains.

Calculating Your Capital Loss

The capital loss on a crypto disposal is calculated as:

Capital Loss = Cost Base minus Proceeds

Where the cost base is what you paid for the asset, including any acquisition fees or gas fees associated with the purchase, and the proceeds are the AUD value received on disposal, less any disposal costs such as trading fees.

For example: you purchase Ethereum for $5,000 AUD including fees. You later sell it for $3,000 AUD after fees. Your capital loss is $2,000 AUD.

If you acquired the same asset in multiple purchases at different prices, the cost base calculation becomes more complex. The ATO requires consistent use of a cost base method, whether that’s first in first out (FIFO), last in first out (LIFO), or specific identification. Most crypto tax software tools handle this calculation automatically once transaction data is imported, which is one of the strongest arguments for using purpose-built tools rather than attempting to calculate manually across a large transaction history.

Crypto-to-Crypto Trades and Losses

One of the most common sources of unreported capital losses is crypto-to-crypto trading. Many investors don’t realise that trading one cryptocurrency for another is a disposal event that can trigger either a capital gain or a capital loss.

If you trade Bitcoin for Ethereum, you have disposed of your Bitcoin at its AUD value at the time of the trade. If that value is lower than your cost base for the Bitcoin, you have realised a capital loss. That loss is reportable and can be used to offset other capital gains.

The same applies to trading any cryptocurrency into a stablecoin. Moving from Ethereum into USDT is a disposal of Ethereum. If Ethereum has dropped in value since you acquired it, that trade realises a capital loss that you are entitled to report and carry forward if needed.

As covered in our resource on how the ATO tracks your crypto transactions, the ATO has significant data matching capability across centralised exchanges. Reporting your losses accurately and completely is just as important as reporting your gains, both for compliance and to ensure you’re not leaving legitimate tax offsets on the table.

Lost, Stolen, and Hacked Crypto: Can You Claim a Loss?

This is one of the most complex and frequently asked questions in Australian crypto tax. If your crypto is stolen in a hack, lost through a scam, or permanently inaccessible due to a lost seed phrase or private key, can you claim a capital loss?

The answer is: it depends, and the specifics matter significantly.

Theft and hacks: The ATO’s position on stolen crypto is that a capital loss may be available if you can establish that the theft has occurred, the crypto is genuinely unrecoverable, and you have supporting evidence. Evidence includes police reports where applicable, transaction records showing the outbound transfer to an unknown address, and documentation of the platform or wallet involved. The loss is typically recognised in the financial year the theft is confirmed as unrecoverable.

For crypto lost through exchange collapses like FTX or Celsius, the situation is more nuanced. Where there is still a legal process underway, such as a bankruptcy proceeding with potential distributions to creditors, the ATO may not allow the loss to be claimed until the amount that is genuinely unrecoverable is determined. The loss becomes crystallised once it is clear that no further recovery is possible. Our resource on the risks of keeping crypto on an exchange covers the circumstances that lead to these situations.

Lost seed phrases and private keys: Where crypto is permanently inaccessible because the seed phrase or private key has been lost, the ATO’s position is less clearly defined. The crypto technically still exists on the blockchain. You still legally own it even if you can’t access it. The ATO has not issued definitive guidance on whether permanent loss of access to a wallet constitutes a capital loss event. This is an area where professional tax advice is particularly important before attempting to claim a loss.

Scams: Where crypto is sent to a scammer through a fraudulent scheme, the ATO may allow a capital loss if the crypto is genuinely unrecoverable and you have evidence of the scam. Documentation of the circumstances, the amounts involved, and any reports made to relevant authorities strengthens the claim.

In all of these scenarios, detailed records and professional tax advice are essential. These are not straightforward deductions and the ATO will scrutinise them carefully.

The CGT Discount and Losses: An Important Interaction

The 50% CGT discount that applies to assets held for more than 12 months interacts with capital losses in a way that is worth understanding carefully, because the order of operations matters.

When you have both capital gains and capital losses in the same financial year, the ATO requires losses to be offset against gains before the CGT discount is applied. This means your capital losses are first applied against your gross gains, and the 50% discount is then applied to the remaining net gain.

This has an important implication: capital losses are effectively “worth” more when offset against short-term gains, which are fully assessable, than against long-term gains that are subject to the 50% discount. A $1,000 AUD loss offset against a short-term gain saves you from paying tax on $1,000 AUD of income. The same $1,000 AUD loss offset against a long-term gain subject to the 50% discount effectively saves you from paying tax on $500 AUD of net assessable income.

For investors with both short-term and long-term gains, the sequencing of how losses are applied can affect the overall tax outcome. This is another area where working with a qualified tax professional who understands crypto is genuinely valuable.

Wash Sales: A Practice the ATO Actively Scrutinises

A wash sale involves selling an asset to realise a capital loss and then immediately reacquiring the same or a substantially similar asset, with the intention of manufacturing a tax loss while maintaining the same economic position.

The ATO has specifically flagged wash sales in crypto as a practice it actively scrutinises. If the ATO determines that a disposal was not genuine and was undertaken primarily for the purpose of manufacturing a capital loss, it has the power to treat the transaction as a wash sale and disregard the loss for tax purposes.

In practical terms, selling Bitcoin at a loss on 30 June and buying it back on 1 July with the primary purpose of crystallising a loss while maintaining your Bitcoin position is the kind of transaction the ATO looks for. The test is whether the dominant purpose was tax avoidance rather than a genuine commercial decision. Genuinely exiting a position for reasons other than tax, and later reacquiring it based on changed circumstances or a new investment decision, is different from a manufactured wash sale. But the line requires careful navigation and professional advice.

How to Actually Report Losses in Your Tax Return

Capital losses from crypto are reported in the Capital Gains section of your Australian tax return, accessed through myTax or your tax agent’s software.

You report the total capital proceeds from all disposals, the total cost base across all disposals, and the resulting net capital gain or net capital loss for the year. If you have a net capital loss, it is recorded and carried forward automatically within the tax return system for offset against future capital gains.

Supporting your return with accurate transaction records is essential. As covered in our ATO crypto reporting resource, the ATO cross-references exchange data against reported figures and discrepancies are flagged for review. Accurate, complete reporting of both gains and losses is the only position that holds up to scrutiny.

Crypto tax software that imports your transaction history from exchanges and wallets automatically and generates a tax report aligned with ATO requirements is the most practical solution for investors with significant transaction volumes. For investors with staking and yield farming activity generating frequent reward events, the manual alternative is genuinely unmanageable at scale. Our resource on tax implications of staking and yield farming in Australia covers the specific obligations that apply to those income streams.

Key Takeaways

Crypto capital losses are valuable tax assets that can offset capital gains and reduce your overall CGT liability. They cannot offset ordinary income but carry forward indefinitely until fully utilised. Crypto-to-crypto trades, stablecoin conversions, and disposals at a loss all trigger capital losses that must be reported. Stolen, hacked, or lost crypto may be claimable as a capital loss depending on the specific circumstances and the evidence available. The CGT discount interacts with losses in a sequenced way that affects the overall tax outcome. And wash sales are actively scrutinised by the ATO and should be avoided.

Crypto losses, reported correctly, are one of the most practical tax planning tools available to Australian crypto investors. The investors who track their transactions accurately from the start are the ones who can take full advantage of them when the opportunity arises.

For investors managing complex crypto tax positions with significant transaction histories, our Black Emerald and Obsidian Tier Members receive access to dedicated tax tools and specialist support as part of their membership. For everyday investors building strong compliance habits from the ground up, our Runite Tier Membership provides the education and frameworks to approach crypto tax correctly from day one.

Find out more at shepleycapital.com/membership.

WRITTEN & REVIEWED BY Chris Shepley

UPDATED: MARCH 2026