Crypto assets have created a significant bookkeeping and tax compliance challenge for Australian practitioners. The ATO's position — that crypto assets are capital gains tax (CGT) assets, not foreign currency — means every disposal event triggers a capital gain or capital loss calculation requiring accurate cost base records. Add in DeFi income, staking rewards, airdrops, and hard fork tokens, and the record-keeping obligation quickly becomes complex.
The ATO's Foundational Position
The ATO has been explicit since at least 2014: cryptocurrency is not currency for Australian tax purposes. It is a CGT asset under s.108-5 of the Income Tax Assessment Act 1997 (ITAA 1997). This means:
- Acquiring crypto is an acquisition of a CGT asset
- Disposing of crypto (selling, exchanging, using it to purchase goods or services, or giving it away) is a CGT event A1 or related event under Division 104 of ITAA 1997
- A capital gain arises if the proceeds exceed the cost base; a capital loss arises if the cost base exceeds the proceeds
- The 50% CGT discount under Division 115 of ITAA 1997 is available if the asset has been held for more than 12 months by an individual or trust (not by a company)
The "not currency" treatment is significant because it means even small everyday transactions — using Bitcoin to pay for coffee, for example — trigger a CGT event. Every disposal is taxable.
Record-Keeping Requirements
The ATO requires clients to keep records of each transaction sufficient to calculate their capital gain or loss. The minimum required records are:
- Date of acquisition (when the crypto was received or purchased)
- AUD cost base — the AUD value at the time of acquisition, including any exchange fees or transfer costs
- Date of disposal — when the crypto was sold, exchanged, or otherwise disposed of
- AUD proceeds — the AUD value received at the time of disposal, or the market value of any crypto received in exchange
- Purpose of each transaction (investment, trading, personal use, etc.)
The challenge is sourcing accurate AUD values for each transaction, particularly for:
- Acquisitions from overseas exchanges where the transaction record is in USD or another foreign currency
- Peer-to-peer transactions with no exchange rate reference
- DeFi protocol interactions where no invoice or formal receipt exists
The ATO's guidance recommends using a reputable cryptocurrency exchange's published AUD spot rate at the time of the transaction. Popular aggregator tools (CoinTracker, Koinly) can automate this but the records should be reviewed for accuracy — auto-imported data from exchanges is only as reliable as the exchange's API feeds.
DeFi and Staking Income
Income earned from decentralised finance (DeFi) protocols, staking rewards, and yield farming is treated as ordinary assessable income under s.6-5 of ITAA 1997, not as a capital gain. The income is recognised at the time of receipt, valued at the AUD market price on that date.
Staking rewards: When a validator receives staking rewards (new tokens), each reward is assessable income at the AUD value on receipt. The cost base of those reward tokens for future CGT purposes is the same AUD value at which they were brought to account as income.
Liquidity pool income: Fees earned from providing liquidity to a DeFi protocol are assessable income. Adding and removing tokens from a liquidity pool may or may not be a CGT disposal depending on whether the liquidity pool tokens received are considered a new asset or a representation of the existing asset — the ATO's position on this is still evolving and practitioners should monitor ATO guidance.
Active traders: Where a client is genuinely carrying on a business of trading crypto assets (frequent trading, sophisticated approach, profit-making intent), the assets may be treated as trading stock rather than CGT assets under Part 2-40 of ITAA 1997. In that case, gains and losses are ordinary income and expenses, not capital gains — and the 50% CGT discount is unavailable.
Airdrops and Hard Forks
Airdrops (unsolicited receipt of new tokens into an existing wallet) are assessable income at the AUD market value on receipt, even if the recipient did not initiate the receipt. The cost base for the airdropped tokens is that assessed value.
Hard forks (protocol splits that create a new coin): when a blockchain forks and holders receive new-chain tokens, the ATO's position is that the new tokens are acquired at a zero cost base, and any proceeds on future disposal are fully assessable as a capital gain with no cost base to offset.
Exchange Rate Source for AUD Conversion
For each transaction, the ATO requires the use of an appropriate exchange rate to convert foreign currency amounts to AUD. The recommended approach is:
- For exchange-traded transactions: use the exchange's published AUD price at the time of the transaction
- For cross-currency swaps (USD to BTC): use a commercially accepted source such as a major exchange's published AUD price or the Reserve Bank of Australia's published exchange rates for the USD component
Document the source used consistently. The ATO will query any rate that appears unusual or unverifiable.
Practical Bookkeeping for High-Volume Clients
Clients with hundreds or thousands of crypto transactions per year require a systematic approach. A data reconciliation process should:
- Pull transaction history from each exchange (CSV exports or API feed)
- Convert all foreign currency amounts to AUD using the exchange's published rates
- Apply FIFO, LIFO, or specific identification to determine cost base of each disposal
- Calculate capital gains and losses per disposal event
- Aggregate income from staking/DeFi
- Reconcile bank deposits from exchange withdrawals to the client's bank statements
ReconLink can be used to reconcile the AUD bank side — exchange cashouts and bank deposits — keeping the fiat-side records clean and separate from the on-chain activity log.
Legislation and Further Reading
- Income Tax Assessment Act 1997, s.108-5 — definition of CGT asset
- Income Tax Assessment Act 1997, Division 104 — CGT events
- Income Tax Assessment Act 1997, Division 115 — 50% CGT discount
- Income Tax Assessment Act 1997, s.6-5 — assessable income (ordinary income)
- ATO: Tax treatment of crypto assets (www.ato.gov.au/individuals-and-families/investments-and-assets/crypto-asset-investments)
- ATO: Record keeping for crypto assets (www.ato.gov.au/individuals-and-families/investments-and-assets/crypto-asset-investments/record-keeping-for-crypto)