Free Australian crypto tax calculator — works out capital gains tax on Bitcoin, Ethereum and any crypto disposal using current ATO 2025-26 rates. Includes the 50% CGT discount and personal use asset exemption.
🧮 Open the Free Crypto Tax Calculator
No account needed. Enter your crypto disposal details and get your CGT figure instantly — including the 50% discount for long-term holders.
Open Calculator →What the Calculator Covers
The MegaCalcOnline crypto tax calculator is built around current ATO rules for the 2025–26 financial year. It handles:
- All disposal types: AUD sale, crypto-to-crypto swap, and spending crypto on goods or services — because all three are taxable CGT events under ATO rules, not just cash-outs to dollars
- The 50% CGT discount: Automatically applies when you select "held more than 12 months," halving the taxable gain before calculating tax at your marginal rate
- Capital losses: Offset your gain by any capital losses carried forward from prior years
- Your marginal tax rate: Uses the 2025–26 income tax brackets to calculate the additional tax payable on the gain, based on your total other income
- Personal use asset exemption: Toggle this on if the crypto was genuinely acquired and used quickly for personal purchases — the calculator will show the gain as potentially exempt
How to Use the Calculator
- Select your disposal type — sold for AUD, swapped for another crypto, or spent on goods/services
- Enter your cost base — the AUD amount you originally paid for the crypto, not including exchange fees (add those in the fees field separately)
- Enter your disposal proceeds — the AUD you received, or the AUD market value of the crypto or goods you received if it was a swap/spend
- Enter any fees — exchange fees on the disposal reduce your proceeds and therefore your gain
- Select your holding period — more than 12 months gives you the 50% CGT discount
- Enter your other taxable income — your salary, rental income etc. for the year (not including the crypto gain itself) — this determines which marginal rate applies to the gain
- Click Calculate — the result shows your gross gain, discounted taxable gain, CGT payable, and effective rate
What the Calculator Doesn't Cover
The calculator is designed for straightforward individual disposals. For complex situations, you'll need dedicated crypto tax software or a registered tax agent:
- Multiple transactions across an entire financial year (the calculator handles one disposal at a time)
- DeFi activity — staking, liquidity pools, yield farming, wrapped tokens
- NFT trades
- Mining income
- Complex cost base allocation across many purchases of the same asset (FIFO, LIFO, HIFO)
- The proposed 2027 CGT reform estimate (available on our main CGT calculator as an optional toggle)
Need to calculate a full year of transactions? Our free calculator handles individual disposals. For a complete annual tax report ready to lodge in myTax, try one of these ATO-compliant tools:
Koinly — Best Overall
Summ — Best for DeFi
What Counts as a Crypto Disposal in Australia?
A common misunderstanding is that only selling for Australian dollars triggers tax. The ATO defines disposal broadly — all of these are taxable CGT events:
| Disposal type | Example | Taxable? |
|---|
| Sell for AUD | Selling Bitcoin on CoinSpot for dollars | ✅ Yes |
| Swap for another crypto | Trading BTC for ETH on an exchange | ✅ Yes |
| Spend on goods/services | Paying for a subscription in crypto | ✅ Yes |
| Gift to another person | Sending crypto to a friend or family member | ✅ Yes (at market value) |
| Transfer between own wallets | Moving ETH from Binance to your MetaMask | ❌ No |
| Buying and holding | Buying Bitcoin and keeping it | ❌ No |
About the 50% CGT Discount for Crypto
The 50% CGT discount is the single most powerful tool available to Australian crypto investors. If you hold a crypto asset for more than 12 continuous months before disposing of it, only half of the net capital gain is included in your assessable income. The other half is completely disregarded.
The discount applies to individuals and trusts. It does not apply to companies or to investors classified as carrying on a trading business. It also does not apply to the proposed post-2027 rules (if eventually passed by Parliament) — though those are not yet law.
Which Parcel Did You Sell? Cost Base Identification
This is the practical problem that no simple calculator solves, and the one that causes the most trouble in real returns.
Suppose you bought bitcoin three times: 0.5 at $30,000, 0.5 at $50,000, and 0.5 at $80,000. You now sell 0.5. Which parcel did you sell?
The answer materially changes your tax. Selling the $30,000 parcel realises a large gain. Selling the $80,000 parcel may realise a loss. Each parcel is a separate CGT asset with its own cost base and its own acquisition date, and the acquisition date determines whether the CGT discount is available.
The ATO generally expects you to identify which specific parcel was disposed of, and to keep records supporting that identification. Where identification is not possible, a reasonable method applied consistently is expected — not a method selected after the fact to produce the most convenient answer for that particular year.
A single-transaction calculator cannot make this determination for you. It calculates the gain once you have decided which cost base applies.
When a Calculator Is Enough, and When It Is Not
A calculator is sufficient where you have made a small number of straightforward disposals, you know the cost base of each parcel, and your activity is limited to buying and selling on an exchange.
Dedicated software becomes worthwhile once you have hundreds of transactions, multiple exchanges and wallets, or transfers between them that need reconciling into a single transaction history.
A registered tax agent becomes necessary where you have staking, DeFi, liquidity provision, or lending activity, where you may be carrying on a business of trading, or where prior years may have been reported incorrectly.
The cost of professional advice is generally far less than the cost of an amended assessment with penalties and interest applied across several years.
What to Give Your Accountant
- A complete transaction history from every exchange and wallet, exported as CSV where possible.
- Records of transfers between your own wallets, so these are not mistaken for disposals.
- The Australian dollar value at the date of each acquisition and disposal, including crypto-to-crypto swaps.
- Details of any staking rewards, airdrops, or forks, with dates and market values on receipt.
- Any carried-forward capital losses from prior years.
- Evidence of fees paid on acquisition and disposal.
Providing this in an organised form generally reduces the cost of the engagement considerably, because reconstructing it is where the hours go.
Common Mistakes When Using a Crypto Tax Calculator
Treating a wallet transfer as a disposal. Moving crypto between wallets you control is not a CGT event. Many people include these and overstate their gains.
Using the average cost across all parcels. Each parcel is a separate asset with its own cost base and acquisition date. Averaging is not a substitute for identification.
Entering today's exchange rate for a historical transaction. The Australian dollar value at the time of the transaction is what matters, not the value now.
Omitting fees. Acquisition fees increase the cost base and disposal fees reduce the proceeds. Both reduce the taxable gain.
Assuming the discount applies because you have held some coins for a year. The discount depends on the holding period of the specific parcel disposed of.
Relying on a calculator for staking or DeFi. These generally involve ordinary income or non-obvious disposals, which a CGT calculator is not designed to handle.
Summary
A crypto tax calculator estimates the capital gain on a single disposal once you know the cost base, the proceeds, and the holding period. It is genuinely useful for that, and it is not a substitute for a transaction history.
The hard parts are identifying which parcel you sold, converting every transaction to Australian dollars at the correct date, excluding transfers between your own wallets, and handling staking and DeFi activity that falls outside capital gains entirely.
This page provides general information only and is not tax advice. Keep records for five years after each CGT event, and confirm your position with a registered tax agent experienced in crypto before lodging.