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In Australia, calculate crypto capital gains or losses for each disposal in Australian dollars (AUD): determine the disposal proceeds, subtract the asset’s cost base, and test any shortfall against its reduced cost base. Then combine all events, apply allowable current-year and carried-forward capital losses, apply any eligible 50% CGT discount, and enter the result in the capital-gains section of your return. Selling is not required: swapping one crypto asset for another, gifting crypto, converting it to currency, or spending it on goods or services can each be a CGT event.

What you must calculate

Australian tax treats an investment crypto asset as a CGT asset. The calculation is made separately for every disposal, then consolidated for the income year. Under section 100-45 of the Income Tax Assessment Act 1997, the basic sequence is:

  1. Work out the capital proceeds in AUD for the disposal.
  2. Work out the asset parcel’s cost base, including eligible incidental costs.
  3. Subtract the cost base from the proceeds.
  4. If the result is not a gain, compare the proceeds with the reduced cost base to determine whether a capital loss exists.

A positive result is a capital gain. A negative result is a capital loss only when the proceeds are below the reduced cost base. If proceeds fall between the reduced cost base and cost base, there is generally no gain and no deductible capital loss.

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Which crypto transactions are CGT events?

The Australian Taxation Office (ATO) treats each of the following as a possible disposal:

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  • Selling crypto for Australian dollars or another fiat currency.
  • Swapping one token for another token.
  • Exchanging crypto for a different crypto asset through an exchange or decentralised arrangement.
  • Converting crypto to Australian or foreign currency.
  • Gifting crypto to another person.
  • Buying goods or services with crypto.

A swap is taxable even when no Australian dollars reach your bank account. As Tim Loh of the ATO explained in a 2022 transcript, “Swapping is like transferring. Technically, what you’re doing is disposing one type of coin to acquire another one.” The token received in the swap starts a new acquisition parcel with its own date and AUD value.

Collect the records before calculating

Export transaction histories from every exchange, wallet and payment service you used. Do not rely on a single exchange statement: transfers between your own wallets, deposits, withdrawals and staking activity may be absent or labelled inconsistently.

Information to retain for every transaction

  • Date and time, with the relevant time zone.
  • Asset and quantity sent, received or disposed of.
  • Australian-dollar value at the time of the event and the method or market used to value it.
  • Fees and other eligible incidental costs, shown separately.
  • Transaction purpose, such as investment, personal spending, staking or a transfer between your own wallets.
  • Counterparty details and wallet addresses where available.
  • Receipts, trade confirmations, deposit and withdrawal records, and evidence supporting any valuation.

The ATO says records must cover each separate crypto asset and every transaction. Keep them for five years from the later of the date you prepared or acquired the record, completed the transaction, or the end of the income year in which the CGT event occurred. Retain them longer when an amendment period or a capital loss carried forward requires it. Keep original exports in a format that can still be opened if an exchange account is later closed.

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Step-by-step calculation for each disposal

1. Match the disposal to an acquisition parcel

Identify which units were disposed of and the date and value at which those units were acquired. If you bought the same asset on multiple dates, maintain parcel-level records rather than applying one average figure without support. A swap also creates a new acquisition parcel for the asset received.

2. Convert every amount to AUD

Use the market value at the relevant time of each event. Convert foreign-currency prices and token-to-token trades to AUD, and document the exchange rate, price source, timestamp and calculation. The proceeds and acquisition values must be in AUD even when the transaction occurred on an overseas platform or entirely on-chain.

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3. Build the cost base

Start with what you paid for the parcel and add eligible incidental costs connected with acquiring or disposing of it. Fees must be allocated to the transaction they relate to and supported by records. Apply the reduced-cost-base rules when testing a loss; not every amount included in a cost base is treated identically in a reduced cost base.

4. Calculate the event result

Use this worksheet for each disposal:

Item Amount (AUD) How to determine it
Capital proceeds Value at disposal Market value of cash, crypto or property received, converted to AUD.
Less: cost base Acquisition value plus eligible costs Use the matched acquisition parcel and documented fees.
Capital gain Proceeds minus cost base Positive result before applying losses or a discount.
Reduced-cost-base test Compare proceeds with reduced cost base Used when proceeds do not exceed the cost base.
Capital loss Reduced cost base minus proceeds Arises only when proceeds are below the reduced cost base.

Illustrative calculation

Suppose you acquire a parcel for A$4,000 and pay A$100 of eligible acquisition costs, giving a A$4,100 cost base. You later swap it when its AUD market value is A$6,000 and incur A$50 of eligible disposal costs. If that disposal cost is included in the parcel’s cost base under the applicable rules, the adjusted cost base is A$4,150 and the event gain is A$1,850 (A$6,000 minus A$4,150). This is illustrative arithmetic, not an ATO example. Confirm the treatment of each fee and use your own transaction timestamps and valuations.

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Combine gains, losses and the CGT discount

Add all event gains and losses

After calculating every disposal, total the capital gains and separately total the capital losses for the income year. A loss from one token can offset a gain from another token, provided both are capital-account transactions and the loss is allowable.

Apply losses before any discount

Use current-year capital losses first, then any unapplied capital losses carried forward from earlier years. Capital losses cannot reduce ordinary income and cannot create a negative net capital gain. If losses exceed gains, the unused net capital loss is carried forward to a later income year.

Check the 12-month discount

An Australian-resident individual who held an asset for at least 12 months may qualify for the 50% CGT discount. The ATO’s 2022 Tim Loh transcript describes this eligibility in general terms. Assets held for less than 12 months use the non-discounted method. The discount applies to eligible net capital gains after losses have been applied; it does not apply to capital losses. Companies and taxpayers with different residency or trust circumstances can have different rules.

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The resulting sequence is:

  1. Total current-year capital gains.
  2. Subtract allowable current-year losses.
  3. Subtract allowable carried-forward losses.
  4. Apply the 50% discount to any remaining eligible gain.
  5. Report the net capital gain, or carry forward any remaining net capital loss.

Entering crypto amounts in myTax

For the 2024 myTax instructions cited by the ATO, use the capital-gains section as follows:

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  1. Enter the total of your event gains at Total current year capital gains.
  2. Apply the loss and discount calculations in the return’s CGT section.
  3. Enter the final taxable amount at Net capital gains.
  4. If losses remain after offsetting gains, enter them at Net capital losses carried forward to later income years.

The cited 2024 instructions require a CGT schedule when your total current-year capital gains or losses are more than A$10,000. That threshold is measured before the final netting outcome, so retain your event worksheet even if your net capital gain is small or zero. Check the myTax instructions for the specific income year you are lodging because labels and thresholds can change.

Staking rewards, airdrops and later disposals

Staking rewards and airdrops can be income items rather than capital gains at the time you receive them. The ATO investor toolkit says to include applicable amounts at Other income. Keep the AUD value and receipt date because the received tokens can later be disposed of in a separate CGT event.

For a later disposal, preserve the acquisition date and value used when the reward or airdrop was recognised. Do not treat the same receipt as both a new capital gain and an unreported income item. DeFi arrangements, liquidity provision, wrapped tokens and protocol rewards can involve multiple events and do not always fit a simple exchange export; obtain advice when the legal or economic steps are unclear.

When the personal-use exception might apply

Crypto held as an investment is generally subject to CGT. A limited personal-use-asset exception may disregard a gain when the asset was acquired for less than A$10,000 and was genuinely acquired for personal use or enjoyment. The ATO warns that the longer crypto is held, the less likely it is to qualify as a personal-use asset.

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Document your original purpose, how you used the crypto and the holding period. Buying a token as an investment and later spending it does not automatically make it personal-use crypto. The exception has conditions and does not turn trading activity into tax-free spending.

Choosing how to prepare the calculation

The right method depends on transaction complexity, not simply the number of trades. Compare the following capabilities before choosing self-preparation, software or professional help.

Factor Self-preparation Crypto tax software Registered tax agent
Transaction volume Practical for a small, clean dataset. Useful for many trades when imports reconcile. Best when volume is high or records need reconstruction.
Wallets and exchanges Requires manual exports and matching. Can consolidate accounts if supported; verify every transfer. Can investigate missing or contradictory records.
AUD valuations You select and document each source. Check the pricing source, timestamp and conversion rules. Can review valuation evidence and unusual assets.
Staking, airdrops and DeFi High risk of classification errors. Feature support varies; review generated labels. Provides case-specific interpretation.
Audit trail and exports Build your own parcel worksheet. Keep both imported data and final reports. Retains working papers and advice records.
Privacy Data stays in your own files. Requires sharing transaction data with a provider. Requires sharing records with the agent under professional arrangements.
Current-year support Confirm the current ATO and myTax labels. Confirm the software supports the relevant income year. Ask whether the engagement covers the relevant year and crypto issues.
Total cost Your time and possible data-recovery costs. Subscription or report fees, plus your review time. Professional fees based on complexity.

The ATO generally points taxpayers toward a reputable calculator or a registered tax agent, but an imported report is not proof that every wallet transfer, fee or reward was classified correctly. You remain responsible for the return.

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Common errors and how to fix them

Reporting only cash withdrawals

Problem: You include sales for AUD but omit crypto-to-crypto swaps and purchases made with crypto.
Fix: Review every outgoing transaction and classify each as a disposal, a transfer between your own wallets, a fee or another event.

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Using the purchase price without AUD conversion

Problem: You leave an overseas exchange’s dollar amount unconverted or use an end-of-year price.
Fix: Convert each acquisition and disposal at the relevant time and retain the rate and valuation source.

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Combining all units into one cost base

Problem: You cannot show which acquisition parcel was disposed of.
Fix: Preserve parcel dates, quantities and fees; reconcile partial disposals to the original lots.

Applying the 50% discount to a loss

Problem: You halve a loss or apply the discount before offsetting losses.
Fix: Apply losses first and discount only an eligible remaining gain after the 12-month test.

Ignoring staking or airdrop income

Problem: You record only the later sale of rewarded tokens.
Fix: Check whether the receipt belongs at Other income, then retain its date and AUD value for the later CGT event.

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Assuming a personal-use exemption

Problem: You claim the A$10,000 exception because the token was eventually spent.
Fix: Document the original personal-use purpose and seek advice if the asset was held as an investment or for an extended period.

Trusting an incomplete exchange export

Problem: Deposits, withdrawals, delistings or closed accounts leave gaps.
Fix: Download statements, wallet histories, blockchain records and receipts now; annotate each unmatched movement and keep evidence of your reconstruction.

When professional advice is prudent

Use a registered tax agent when you operated a trading or mining business, have substantial DeFi activity, received complex rewards, changed tax residency, lost records, used loans or derivatives, or cannot distinguish transfers from disposals. Tax outcomes can change with the income year and your facts. The ATO’s Guide to capital gains tax 2025, published 28 May 2025, is a useful current reference point, but you should use the guide and myTax instructions for the year being lodged.

Final pre-lodgment checklist

  • Every sale, swap, gift, conversion and crypto purchase is listed.
  • Each event has an AUD proceeds value and documented valuation method.
  • Each disposal is matched to an acquisition parcel with cost-base evidence.
  • Eligible fees are allocated correctly and reduced-cost-base testing is complete.
  • Staking rewards and airdrops have been considered as income, with later CGT records retained.
  • Current-year and carried-forward losses are applied before any discount.
  • The 12-month holding test and Australian-residency conditions for the 50% discount are checked.
  • myTax labels and the A$10,000 CGT-schedule threshold are checked for the relevant year.
  • Records are stored for at least five years under the ATO’s later-of rule, and longer where required.

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