Bitcoin tax in New Zealand, explained

Inland Revenue treats bitcoin as property. If your main purpose when you bought it was to sell or swap it one day, any profit you make when you do is taxable income. It's added to your other income for the year and taxed at your normal rate.

Here's the part many people miss. Bitcoin pays no interest or dividends, so Inland Revenue says owning it "strongly suggests" your purpose was to sell it eventually. Buying it as a long-term investment, a hedge against inflation or to diversify usually still counts, because those reasons still involve selling one day. One of its own examples is someone who held for three years as "a long-term investment", sold at a profit, and was taxed on it.

Simply saying you bought it for another reason isn't enough. Inland Revenue looks at your purpose at the time you bought, and the evidence around it. For almost everyone buying bitcoin as savings, the practical answer is the same: expect profits to be taxable when you sell, and plan for it.

The good news for long-term holders: there's no tax while you hold. A rising price on bitcoin you still own isn't taxed, and you choose when, and how much, to sell.

Inland Revenue's formula is simple: sale price minus what you paid, minus transaction fees. Every transaction needs a New Zealand dollar value at the time it happened.

If you bought at different times and prices, you need a consistent way to decide which bitcoin you sold. Inland Revenue lists two: first in, first out (the oldest bitcoin goes first) and weighted average cost (an average of everything you paid).

Losses count too. If you sell for less than you paid, the loss can be set against other crypto profits first, then your other income. Losses on bitcoin you still hold can't be claimed; only sales count.

If you've made a lot of transactions, crypto tax software can import your exchange history and produce the figures. Inland Revenue mentions such tools but doesn't endorse any.

Inland Revenue asks you to keep these for at least 7 years, even after you no longer own any bitcoin:

The tax year runs from 1 April to 31 March. If you have taxable crypto income, you file an individual income tax return (IR3), normally by 7 July unless you have a tax agent or an extension. You need to file if you had more than $200 of income that Inland Revenue hasn't already been told about.

Tip: download your full transaction history from every exchange you use at least once a year. Exchanges close, and their records can go with them.

In April 2026 Inland Revenue sent a first batch of letters to people it knows have traded on crypto exchanges, asking them to check their tax position. It says it will match crypto data against tax returns and follow up on gaps.

Its view is getting sharper. Under the international Crypto-Asset Reporting Framework, New Zealand providers have been collecting customer details and transactions since 1 April 2026, with first reports due by 30 June 2027. Tax authorities will also swap data every year, so activity on overseas exchanges becomes visible too. Your provider may ask you to confirm your tax residency; giving false information can bring penalties.

It's common, and fixable. Inland Revenue calls it a voluntary disclosure: telling it what's wrong with your returns before it finds out another way. Penalties are generally much lower when you come forward first than after Inland Revenue has contacted you.

You can make one through myIR, with the IR281 form, by phone or by letter. Have your IRD number, the years affected and what went wrong ready. For anything complicated, a tax adviser can do it for you.