Crypto Gain Tax Calculator NZ
This calculator works out the tax you could owe on a cryptocurrency gain in New Zealand, where crypto is generally treated as property by Inland Revenue and there is no separate capital gains tax. You enter the total cost of your crypto in New Zealand dollars, the total value you sold it for, and your marginal tax rate, chosen from 17.5%, 30%, 33% or 39%. The calculator subtracts your buy cost from your sale value to find the gain, then applies your selected rate because the gain is added to your other income and taxed at whatever rate your total income reaches. It returns three figures: the gain, the estimated tax, and the after-tax gain you are left with. Use it to get a quick sense of what a sale might cost before you cash out, or to plan how much to set aside for tax rather than being caught short at year end. Because every transaction needs converting to New Zealand dollars at the time it happened, keeping accurate records of each buy and sell is essential to a real figure, and losses or frequent trading can be treated differently. This is an estimate only, based on the figures and rate you enter, and is not tax advice, so check your own situation with Inland Revenue or an accountant before filing.
Inland Revenue generally treats crypto as property, and there is no separate capital gains tax, so gains are taxed at your income tax rate. Use New Zealand dollar values at the time of each transaction and keep accurate records. Losses and frequent trading have their own treatment. Estimate only, not tax advice.
How it works
The calculator subtracts your buy cost from your sale value, both in New Zealand dollars, to find the gain. If there is a gain, it applies your marginal tax rate, because the gain is added to your other income and taxed at the rate your income reaches. It then shows the after-tax gain. Because crypto is treated as property and converted to New Zealand dollars at each transaction, keeping good records is essential to getting this right.
Worked example
Buying crypto for $5,000 and selling for $9,000 is a $4,000 gain. At a 33% marginal rate, the tax is about $1,320, leaving an after-tax gain of $2,680. The exact rate depends on your total income, so a large gain can push some of it to the top rate.
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- Tax on Cryptocurrency in NZ: background on this topic.