Crypto Tax Calculator
Estimate income tax on cryptocurrency gains in New Zealand. IRD treats crypto as property — gains on disposal are taxable income at your marginal tax rate.
About this calculator
This calculator implements cryptoasset taxation rules from Inland Revenue (IRD). Last consulted 1 April 2026. Verify the figures yourself by following the link.
Current NZ crypto tax rules
FY 2026-27 (treated as ordinary income)- •Tax treatment: Property — gains taxed as income
- •Tax rate: Your marginal rate (10.5–39%)
- •GST on crypto: Exempt (since 2017)
- •Mining income: Taxed at market value on receipt
- •Losses: Deductible against other income
Source: IRD — Cryptoassets
Disclaimer
This calculator provides estimates for general information purposes only. Results should not be relied upon as professional financial, tax, or legal advice. Tax rates and thresholds are based on publicly available IRD data and may change. Always consult a qualified tax agent or financial adviser for advice specific to your circumstances.
How NZ crypto tax is calculated
NZ does not have a separate CGT — crypto gains are taxed as ordinary income at your marginal rate when you sell, swap, or spend. IRD treats it as property under the disposal rules.
- 1
Calculate the capital gain (or loss)
Gain = sale_proceeds_NZD − cost_basis_NZD
Use NZD value at the time of each transaction.
- 2
Add gain to your other taxable income
Total_income = salary + business + other + crypto_gain
Gains stack on top of salary, so high earners pay 33-39% on crypto.
- 3
Apply marginal tax rate
Tax_on_gain = gain × marginal_rate (10.5/17.5/30/33/39%)
Marginal rate = the bracket your TOP dollar lands in.
- 4
Losses can offset gains
Net_taxable = max(0, total_gains − total_losses)
Losses carry forward to future years if unused.
Worked example
Inputs: $80k salary + $30k crypto gain
Result: Gain hits 33% bracket → tax on gain = $30,000 × 33% = $9,900.
Frequently Asked Questions
Is cryptocurrency taxed in New Zealand?
What about crypto mining and staking rewards?
How does IRD know about my crypto?
IRD treats cryptocurrency as property, not currency. Most people who acquire crypto with the purpose of disposal (which IRD presumes for nearly all crypto purchases) must pay income tax on any gains at their marginal tax rate. Losses are deductible.
How this calculator works
Enter your crypto purchase price (in NZD), sale price (in NZD), and your other taxable income. The calculator works out your gain, then taxes it at your marginal PAYE rate (10.5–39%). Mining and staking rewards are taxable as income at fair value.
NZ Crypto Tax Rules (IRD)
| Treatment | Property (not currency) |
| Gains taxed at | Your marginal PAYE rate (10.5–39%) |
| Losses | Deductible against other income |
| Mining / staking | Income at NZD fair value when received |
| Crypto-to-crypto swap | Taxable disposal |
| Holding (no sale) | Not taxed |
IRD has data-sharing arrangements with NZ exchanges — keep good records.
Worked Examples
Buy 1 BTC for $50,000 NZD, sell 18 months later for $80,000 NZD; salary $90,000
Tax on gain: ~$9,900
- Gain: $80,000 - $50,000 = $30,000
- Other income: $90,000 (top bracket 33% kicks in above $70k)
- First $0–$0 of gain in 30% bracket: 0
- Gain mostly falls in 33% bracket (income now $90k–$120k)
- Approx tax: $30,000 × 33% = $9,900 (simplified)
Built and maintained by Konstantin Iakovlev. Data sourced from the IRD and official New Zealand government sources.
Last reviewed: