Mining is the one part of the crypto world with a physical footprint: hardware, heat, noise and a power bill. In New Zealand it is entirely legal and moderately taxed, and the question of whether it is worth doing comes down to arithmetic that most people run optimistically.
The legal position
Mining is lawful in New Zealand and requires no licence or registration specific to the activity. There is no restriction on home mining, no special electricity tariff, and no approval process.
What applies instead are ordinary rules. If you are mining at a scale that constitutes a business, you have business obligations, potentially including GST registration if your turnover exceeds the threshold. If you are running significant hardware in a rental property, the tenancy agreement and electrical safety requirements are a real consideration. And the tax treatment applies regardless of scale.
How Inland Revenue treats mining
IRD's stated view is that in most cases mining activities — whether conducted individually or through a pool — are carried out as a business or with the intention of making a profit. That framing has consequences in both directions.
Rewards are income when received, valued in New Zealand dollars at market value on the day. This applies to every payout, which for a pool participant may be daily. You do not get to defer the income until you sell.
Selling later is a second taxable event. If the coins appreciate between receipt and disposal, that further profit is also taxable. Your cost base is the value you already declared as income.
Costs are deductible. Electricity, repairs and maintenance are typically deductible revenue expenses. Hardware is usually capitalised and depreciated over its useful life, with the depreciation claimed as a deduction. Where equipment is used partly for personal purposes, apportionment applies.
Keep a daily record
The obligation to value rewards on receipt means a miner needs a per-payout record with dates and New Zealand dollar values. Doing this retrospectively across a year of daily pool payouts is genuinely difficult. Most mining pools export the data — download it monthly. Our filing guide covers what is required.
The number that decides everything
Electricity price. New Zealand has strong renewable generation, reliable infrastructure and a temperate climate that helps with cooling, all of which are genuine advantages. What it does not have is cheap retail power by the standards of industrial mining regions.
As a rough orientation, above about 20 cents per kilowatt hour margins on most consumer hardware compress quickly, and typical New Zealand residential rates sit in that territory or above. Industrial Bitcoin mining operates at a fraction of that, which is why home Bitcoin mining stopped being viable years ago.
| Input | Why it matters and how people get it wrong |
|---|---|
| Power price per kWh | Use your actual all-in rate including daily charges, not the headline unit price. |
| Hardware draw | Measure at the wall. Rated figures understate real consumption, and power supply efficiency losses are real. |
| Uptime | Nobody runs 100%. Failures, thermal throttling and outages all reduce it. |
| Network difficulty trend | Difficulty generally rises. Modelling on today's difficulty overstates future revenue. |
| Hardware depreciation | Equipment obsoletes fast. Assume a short useful life, not five years. |
| Cooling and noise | Additional power for extraction, and a genuine domestic liveability cost. |
| Tax at up to 39% | Rewards are income on receipt. Model returns net, not gross. |
What people actually mine here
Bitcoin is out of reach for home operations — it is dominated by industrial ASIC facilities with power costs New Zealand households cannot approach. GPU mining of other proof-of-work coins remains possible, and CPU mining is essentially a learning exercise rather than an income source.
Some New Zealanders mine for reasons other than profit: understanding the technology, supporting a network they believe in, or using waste heat productively in a cold climate. Those are legitimate motivations and they should be stated honestly in the maths rather than dressed up as an investment case.
Practical considerations specific to New Zealand
- Check your power plan. Some retailers offer off-peak or controlled rates that change the arithmetic considerably. Some prohibit commercial use on residential connections.
- Check your tenancy agreement if renting. High continuous load and modifications may breach it.
- Electrical safety matters. Continuous high-draw equipment on domestic circuits is a genuine fire risk. Use appropriately rated circuits and get an electrician involved for anything substantial.
- Insurance. Tell your insurer. An undisclosed commercial activity can void a claim.
- Heat is an asset in winter and a problem in summer. Plan for both.
- Withdraw regularly. Do not let rewards accumulate in a pool account — that is custodial exposure with no protection.
Tax and business status
Because IRD generally treats mining as a profit-making activity, the practical question is usually not whether it is taxable but how it should be structured. If you are running meaningful hardware, talk to an accountant about business status, depreciation of equipment, apportionment of shared costs like power, and whether GST registration applies.
Getting this right at the start is far cheaper than reconstructing it. Our accountants page covers finding someone who has handled mining before, and the tax guide sets out the wider framework.
The honest conclusion
For most New Zealanders in 2026, home mining is not a competitive way to acquire cryptocurrency. Electricity prices, hardware costs, rising difficulty and income tax at up to 39% on rewards combine to make simply buying the asset a better use of the same capital.
That is not an argument against mining as an interest, an education, or a use for surplus generation. It is an argument for doing the arithmetic before the purchase order, and for being honest with yourself about which of those you are actually doing.