Crypto mining tax in Australia: hobby vs business, deductions, and the ATO rules for 2026

Hobby vs business: the central distinction

Every other answer in this guide flows from one question: are you carrying on a business of mining, or are you mining as a hobby? The ATO does not let you choose. The classification is determined by the facts of your operation, applied against the same general business indicators the ATO uses for any activity.

The factors the ATO weighs:

• Scale of operations. One GPU running on your gaming PC overnight is hobby scale. A dedicated room with eight ASIC miners pulling 12 kilowatts is business scale. The middle ground is grey.
• Repetition and regularity. Mining continuously for months on end with consistent uptime looks more like a business. Mining intermittently when electricity is cheap looks more like a hobby.
• Profit motive vs personal interest. Did you set this up to make money, or because you find it interesting? A business plan, modelled break-even calculations, and tracking of profitability are business indicators.
• Business-like records. Separate accounting, invoices for hardware, structured cost tracking, and tax planning are business indicators. Notes in a spreadsheet are not.
• Capital investment and commercial viability. A meaningful capital outlay (rigs, electrical work, cooling) combined with realistic profit potential at current difficulty and AUD coin prices points toward business.
• Time committed. Hours per week spent monitoring, maintaining, and optimising the operation.

No single factor is decisive. The ATO weighs them together. In practice, almost all single-rig home miners running on shared household electricity are hobbyists. Almost all multi-rig commercial setups with structured records and a profit motive are businesses. The medium-scale grey zone (two to four dedicated rigs in a garage) is where a tax agent assessment of the specific facts is essential. The classification is not a one-time choice; it can change year to year as your operation grows or shrinks.

Why the classification matters

It changes everything that follows. Hobby miners cannot deduct any costs (electricity, hardware, internet, repairs). Business miners can. Hobby miners report tax only on disposal. Business miners report ordinary income on receipt and again on disposal. The hobby treatment is administratively simpler but can be heavily tax-disadvantageous if your costs are real, because none of them are deductible.

Hobby miner tax treatment

Hobby mining is the default for most home setups. The treatment is straightforward but unforgiving on costs.

When you mine a coin as a hobby:

1. Receipt is not a tax event. You do not declare the coin as income at the moment you mine it.
2. The cost base is zero. The coin enters your records with a cost base of AUD 0 (some tax agents argue for the AUD value at receipt; the more common ATO-aligned position is zero cost base for hobby mining).
3. Disposal triggers CGT. When you sell, swap, spend, or gift the coin, you have a CGT event. The capital gain is the AUD proceeds (or market value if not arm's length) minus the zero cost base, so essentially the full AUD value at disposal.
4. 12 month hold qualifies for the 50 percent CGT discount. If you hold the mined coin for more than 12 months between mining it and disposing of it, the gain is reduced by 50 percent for individuals.
5. No deductions. Electricity, hardware, internet, cooling, and any other cost is personal expenditure. None of it reduces your tax.

The hobby treatment can be surprisingly tax-friendly if you mine small amounts and hold long enough to qualify for the CGT discount. It can be brutal if you have meaningful electricity costs and need to sell mined coins to pay those bills, because you pay tax on the full disposal value with no offset.

Business miner tax treatment

Business miners face a more complex but generally more economically rational treatment. Income is recognised earlier, but costs are deductible.

When you mine a coin as a business:

1. Receipt is ordinary income. The AUD market value of the coin at the moment you receive it is ordinary assessable income, reported as business income in your tax return for the year of receipt.
2. The cost base for CGT purposes equals the AUD value at receipt. This becomes your starting point for any subsequent CGT calculation when you dispose of the coin.
3. Disposal triggers a separate CGT event. When you later sell, swap, or spend the coin, the difference between the disposal value and the cost base (the value at receipt) is a capital gain or loss.
4. Trading stock treatment may apply. If you hold mined crypto as trading stock (intent to sell in the ordinary course of business), it is taxed under the trading stock rules with valuation at year end, not under CGT. Most miners selling rewards regularly to fund operations fall into this category.
5. Deductions are available. Electricity, hardware depreciation, internet, hosting fees, software, repairs, accounting, and other directly attributable costs reduce taxable business income.

The trading stock versus CGT-asset distinction is consequential. Coins held as trading stock are valued at year end (typically cost) and any change in value flows through the trading stock account. Coins held as investment assets follow the standard CGT rules. The ATO's general guidance is that mined coins held for sale in the ordinary course of business are trading stock; coins held longer term as investments are CGT assets. A tax agent should determine which applies to you.

Deductible expenses for business miners

If you are a business miner, the following expenses are generally deductible to the extent they relate to the mining operation. Hobby miners cannot claim any of these.

The general rule is that an expense is deductible under section 8-1 of the Income Tax Assessment Act 1997 if it is incurred in gaining or producing assessable income, or necessarily incurred in carrying on a business. Mining-related expenses meet that test if you are a business; they fail it if you are a hobbyist.

Mining hardware depreciation

Mining hardware is a depreciating asset under Division 40 of the Income Tax Assessment Act 1997. Business miners deduct the cost of the hardware over its effective life rather than expensing it in year one.

The ATO has not published a specific effective life for cryptocurrency mining hardware. In practice, miners and tax agents take one of two approaches:

• Self-assessed effective life. A reasonable estimate based on the actual useful life of the hardware in your operation. ASIC miners are commonly self-assessed at 2 to 3 years given thermal stress, generation cycles, and rapid difficulty-driven obsolescence. GPU rigs are sometimes assessed at 2 to 4 years depending on intensity of use. Document the basis for your estimate.
• Small business simplified depreciation pool. If you are a small business entity (under the relevant aggregated turnover threshold), you can use the simplified depreciation rules: instant asset write-off below the prevailing threshold and pool depreciation above it. Thresholds change year to year, so verify the current rules for the income year you are filing.

If you sell or scrap a depreciating asset, you have a balancing adjustment event: the difference between the termination value (sale proceeds or written-down value at scrap) and the adjustable value of the asset is either assessable or deductible.

Worked depreciation example

Four GPU rig purchased on 1 July 2025 for AUD 8,000. Self-assessed effective life of 3 years. Diminishing value method (rate = 200 percent / 3 = 66.67 percent).

• Year 1 deduction: AUD 8,000 x 66.67 percent = AUD 5,333. Closing adjustable value: AUD 2,667.
• Year 2 deduction: AUD 2,667 x 66.67 percent = AUD 1,778. Closing adjustable value: AUD 889.
• Year 3 deduction: AUD 889 x 66.67 percent = AUD 593. Closing adjustable value: AUD 296.

If you instead applied the prime cost method (straight line) at 33.33 percent, you would deduct AUD 2,667 each year for three years.

Electricity deduction methodology

Electricity is typically the largest ongoing expense for a mining operation and the most scrutinised by the ATO on audit. The deduction is only available to business miners and only for the business-use portion.

Two methods of apportionment are accepted in practice:

• Sub-meter (preferred). Install a dedicated sub-meter on the circuit powering your mining hardware. The sub-meter reading directly measures business electricity consumption in kilowatt-hours, which you multiply by the per-kWh tariff (including supply charges, where attributable) to get the deductible amount. This is the cleanest documentation and the most defensible on audit.
• Calculated apportionment. Where a sub-meter is not installed, you estimate business consumption from rig power draw (in watts) multiplied by hours of operation. For example, a 1,500 W rig running 24/7 consumes 1.5 kW x 24 x 365 = 13,140 kWh per year. At AUD 0.32 per kWh, that is AUD 4,205 in deductible electricity. Document the wattage measurement (a smart plug reading is ideal) and operating hours.

In both cases, keep monthly electricity bills, the apportionment worksheet, and any sub-meter or smart plug data for five years from the date of lodgement.

If your household uses any of the same circuit (e.g., the rig shares a circuit with general lighting), apportion further between business and personal use. The ATO's general expectation is that the methodology is reasonable, documented, and consistently applied.

GST registration and crypto mining

GST registration is required for any business with annual GST turnover (gross receipts from taxable supplies) of AUD 75,000 or more. The threshold applies on a 12 month rolling basis, both projected and current.

For crypto miners, the supply of digital currency itself is treated as input-taxed under the GST Act, similar to a financial supply. This means:

• You do not charge GST on the mined coins themselves.
• You generally cannot claim GST credits on inputs that relate solely to the input-taxed supply of digital currency.

In practice, very few home miners ever cross the AUD 75,000 turnover threshold purely from mining rewards. Where they do, the registration becomes administratively burdensome (BAS lodgement, GST credit apportionment) without producing a meaningful net benefit, because the mined-coin output is input-taxed.

If you also sell mining-related goods or services (e.g., reselling rigs, providing hosting to other miners, consulting on mining setups), those supplies are taxable at the standard 10 percent GST rate, which can push you over the threshold and into mandatory registration. At that point, get a registered tax agent involved.

Pool mining vs solo mining

The tax treatment of pool mining and solo mining is identical in principle. Each receipt of a coin (or fractional coin) is a tax event. The practical difference is how often that event occurs and how the records flow.

• Solo mining. When you find a block, you receive the full block reward in one lump sum. The receipt event is infrequent but large. Hobby miners record the AUD value at receipt as the cost base. Business miners book the AUD value at receipt as ordinary income.
• Pool mining. You receive fractional payouts when the pool hits the payout threshold (often weekly or daily). Each payout is a separate event with its own AUD valuation at the moment of receipt. Over a year, this can produce hundreds of small tax events.

Pool mining records are far more tedious to compile manually. Most miners use Koinly, Summ, or pool-specific exports to ingest the payout history automatically. Pool fees are deductible for business miners; for hobby miners, they reduce the gross reward (you only record the net coins received).

Cloud mining contracts

Cloud mining contracts vary widely in structure, and the tax treatment follows the structure rather than the marketing. Two common patterns:

• Hashpower lease. You pay an upfront (or recurring) fee to lease a defined amount of computing power (e.g., 100 TH/s for 12 months). You receive whatever that hashpower mines, net of operator fees. This is generally treated like running your own mining operation through a third party. Hobby miners record receipts as zero-cost-base CGT assets. Business miners record AUD value at receipt as ordinary income, and the lease fee is either deductible in the year incurred or capitalised over the contract term, depending on the contract length and accounting method.
• Profit-share or fixed-return contract. You pay an upfront fee and the operator pays you a fixed AUD or coin-denominated return, regardless of actual mining output. This looks economically more like an investment than mining. The return may be ordinary income (similar to interest) and the upfront fee may be capital expenditure or depreciable, depending on the structure.

Some cloud mining contracts have collapsed into outright scams. Before assuming a tax treatment, verify the operator's actual mining activity and the contract terms. For material amounts, a private ruling from the ATO removes uncertainty.

Worked example: profitable home mining rig

Setup: a four GPU rig purchased on 1 July 2025 for AUD 8,000. Power draw: 1,500 W continuous. Electricity tariff: AUD 0.32 per kWh. Internet and other minor costs: AUD 600 per year. Mined ETH-equivalent rewards over the year: AUD 12,000 valued at receipt. The miner sells half the rewards (AUD 6,000) during the year to fund electricity bills; the other half (AUD 6,000 at receipt value) is held to year end.

Annual electricity: 1.5 kW x 24 x 365 = 13,140 kWh. At AUD 0.32 per kWh, that is AUD 4,205.

Hobby treatment

• Year 1 income: AUD 0 (mining receipts not declared for hobby miners).
• Year 1 disposal CGT: AUD 6,000 of coins sold during the year (held less than 12 months, so no CGT discount). Cost base AUD 0. Capital gain: AUD 6,000. Added to assessable income at marginal rate.
• Deductions: AUD 0 (no electricity, internet, or hardware deductions for hobby miners).
• Net taxable income from mining: AUD 6,000.
• The remaining AUD 6,000 of coins held at year end: no current tax. CGT will be triggered on future disposal.

Business treatment

• Year 1 ordinary income: AUD 12,000 (full AUD value at receipt of all mined coins).
• Year 1 deductions: electricity AUD 4,205 + internet AUD 600 + hardware depreciation (DV at 66.67 percent of AUD 8,000) AUD 5,333 = AUD 10,138.
• Net business income: AUD 12,000 - AUD 10,138 = AUD 1,862.
• CGT on disposal of half the coins during the year: cost base AUD 6,000 (value at receipt), proceeds AUD 6,000 (assumed sold close to receipt date), capital gain ~AUD 0. (If price moved between receipt and sale, there would be a small gain or loss.)
• Total taxable income from mining: ~AUD 1,862.

The hobby miner pays tax on AUD 6,000. The business miner pays tax on roughly AUD 1,862 (and gets to depreciate the hardware further in years 2 and 3). The business treatment is materially better when costs are real, but it requires you to actually be carrying on a business, with all the record-keeping and ATO scrutiny that comes with it.

How tax software handles mining

Manual mining record-keeping is painful. Pool payouts arrive constantly, AUD valuations are needed at receipt for business miners, and the data has to flow into either business income or CGT-asset records depending on classification. Three Australian-fit tools handle it:

• Summ (formerly CryptoTaxCalculator, the rebrand happened in October 2025). Strong support for mining via API integrations with major exchanges and pools. Hobby and business classification toggles. Produces ATO-format business income reports. SatoshiMacro readers get 20 percent off.
• Koinly is the most widely used tool globally and has explicit mining tracking with hobby and business modes, AUD valuation at receipt, and clean reporting that splits ordinary income from CGT. The strongest fit for miners with operations spread across multiple pools and chains.
• Syla is Australian-built and tax-agent friendly. Mining income is supported via manual entry or CSV. Lighter than Koinly or Summ on direct pool API integrations, but the cheapest option if your mining is straightforward.

If your mining is hobby scale (one rig, occasional disposals, no deductions to track), any of these will work. If you are a business miner with pool API integrations, multiple rigs, and depreciation schedules to maintain, Summ or Koinly are the stronger fits.

For broader crypto tax context, see the parent crypto tax Australia 2026 guide, the sister page on staking tax Australia, the DeFi tax Australia guide, the NFT tax Australia guide, and the EOFY 2026 crypto tax checklist.

Sources and primary references

This guide draws on the following primary sources. Always verify against the ATO website at the time of filing, as guidance is updated regularly.

• ATO, "Crypto asset transactions" (ato.gov.au/individuals-and-families/investments-and-assets/crypto-asset-investments).
• ATO, "Mining cryptocurrency" guidance under the crypto asset transactions section.
• Income Tax Assessment Act 1997, section 8-1 (general deductions) and Division 40 (capital allowances / depreciation).
• A New Tax System (Goods and Services Tax) Act 1999, treatment of digital currency as input-taxed financial supplies.
• ATO, "GST and digital currency" guidance.
• ATO, "Effective life of depreciating assets" (TR 2024/X, current ruling at the time of filing).
• ATO, "Carrying on a business" general indicators (TR 97/11 and related rulings).
• ATO, "Small business depreciation" rules including instant asset write-off thresholds for the relevant income year.

Frequently asked questions

The questions below are also published as FAQ schema for search engines. The answers above and below are identical in substance.

Frequently asked questions