Do I have to declare cryptocurrency in Sweden?
Yes — every time you dispose of cryptocurrency it is a taxable event you must declare. Crypto is taxed as capital. A disposal is selling, swapping one crypto for another, or paying with crypto. The gain is taxed at 30% and reported on form K4, section D. Gains are taxed at 100% while losses are deductible at only 70%. The cost basis is calculated with the average cost method. From the 2026 income year, crypto providers must report your data to the Tax Agency under the EU's DAC8 rules. Not declaring can bring a tax surcharge.
📋 The rules
- Every disposal (sell, swap, pay) is taxable
- Gain is taxed at 30% as capital income
- Reported on form K4, section D
- Gain taxed at 100%, loss deductible at 70%
- Cost basis via the average cost method
🔓 Exceptions
- Merely buying and holding crypto is not a taxable event
- Crypto from salary, mining or staking is taxed as income when received
- Crypto losses can only offset within capital, at 70%
⚠️ Penalties & fines
Undeclared gains can bring a tax surcharge (often 40% of the evaded tax) plus back tax and interest. Deliberate evasion can be tax fraud.
📎 Official sources
- Tax Agency · Cryptocurrencies →
- Tax Agency · DAC8 crypto reporting →
- Income Tax Act (1999:1229) · Riksdagen →
❓ Frequently asked
Must I declare if I swapped one crypto for another?
Yes. A swap between cryptocurrencies counts as a disposal and is a taxable event.
How are crypto gains taxed?
At 30% as capital income. The gain is reported on form K4, section D, in your declaration.
Can I deduct crypto losses?
Yes, but losses are deductible at only 70% within the capital category.
Must I declare if I only hold crypto?
No. Buying and holding crypto without disposing of it is not a taxable event.
What does DAC8 from 2026 mean?
Crypto providers must report your data to the Tax Agency, first for the 2026 income year.
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