Sweden Crypto Tax Calculator

Skatteverket taxes cryptocurrency capital gains at a flat 30% rate for standard holdings reported on form K4. Alternatively, investors can use an Investeringssparkonto (ISK) where a standard tax applies to the account value regardless of gains or losses. Losses are deductible against other capital income, though only 70% of excess losses are deductible. This calculator estimates standard K4 capital gains tax for the 2025 tax year.

The Sweden Crypto Tax Estimator uses the Skatteverket K4 model for 2025. Capital gains are calculated as: Gain = (Selling Price − Purchase Price) × Quantity. Net capital gains are taxed at a flat 30% rate. Losses are deductible against other capital gains in the same year. If your total capital losses exceed your gains, you can deduct 70% of the excess loss against other capital income (such as dividends or interest). The remaining 30% of the excess loss is not deductible. The calculation is: Tax = max(0, Net Gain) × 30%. For losses exceeding gains: Deductible Loss = Total Losses − Total Gains, and Tax Credit = Deductible Loss × 70% × 30%. The calculator does not model the ISK (Investeringssparkonto) alternative, which uses a standard tax on the account value rather than actual gains. All transactions must be reported in SEK using the exchange rate on the transaction date.

Track your gains throughout the year using the Profit/Loss Calculator so you are prepared for end-of-year tax filing. To work out your cost basis across multiple buys, use the DCA calculator.

Swedish taxpayers report crypto capital gains and losses on form K4 (Kapital) attached to their annual income tax return. The filing deadline is 2 May, or later if you request an extension. ISK account holders do not need to report individual transactions because the standard tax is applied automatically by the bank. For standard holdings, you must list each disposal with acquisition and sale dates, amounts, and SEK values. Keep records for at least six years.

A common Swedish mistake is not understanding that only 70% of excess capital losses are deductible against other capital income. Another error is failing to convert all transactions to SEK using the correct exchange rate on the transaction date. Many taxpayers also confuse the K4 reporting requirements with ISK taxation, leading to double-reporting or omissions. Not tracking the acquisition date for each specific lot can make it difficult to calculate accurate gains.