Crypto and tax in Iceland

When does a tax liability arise?

According to Skatturinn, a tax liability can arise when you give up CryptocurrencyCryptocurrencyA digital currency secured by cryptography and recorded on a shared ledger, with no bank or government issuing or controlling it. in return for something else of value. The main examples are:

• selling crypto for krónur or another currency
• swapping one crypto for another, for example bitcoin for ether
• paying for goods or services with crypto

No tax liability arises when you move crypto between your own wallets. How long you have held the crypto makes no difference either. The whole gain counts as income in the year of the sale.

Swaps between cryptocurrencies are taxed when they happen. In guidance letter (ákvarðandi bréf) 1/2022, Skatturinn rejected the idea that tax could be deferred until the crypto is converted into krónur in a bank account.

Crypto you receive

A tax liability can also arise when you receive crypto, for example:

• as wages or contractor payments. The general rules apply, and the employer should withhold tax.
• as a gift. Gifts are taxable unless they are occasional gifts of no more than the usual value for such gifts.
• from MiningMiningThe process in which computers compete to solve a puzzle so they can add the next block to the blockchain and earn new bitcoin and fees.. Skatturinn generally assumes that mining is a business activity. Occasional, small-scale mining by an individual is not, however, treated as a business.

Crypto you inherit is covered in the article Crypto and inheritance.

Capital income or business income?

For individuals, crypto gains are usually capital income. In some cases the activity can count as a business, and the income is then taxed as business income. In the same guidance letter, Skatturinn says that individuals investing in crypto in their own name are generally likely to be outside business activity, even with many transactions and sizeable amounts. There are no fixed thresholds, though.

How are capital gains worked out?

A capital gainCapital gainsThe profit from selling an asset for more than it cost you; for individuals in Iceland, gains on crypto are taxed as capital income. is the difference between the sale price and the cost basisCost basisWhat an asset cost you, meaning the purchase price plus commission. A capital gain is the sale price minus the cost basis..

• Cost basis is the purchase price plus any commission or handling costs. Read about what it costs to buy crypto.
• Sale price is what you received for the crypto. Selling costs can be deducted from the sale price.
• Market value counts. Use the market value of the crypto in krónur at the time of the transaction. If you swap bitcoin for ether, the sale price of the bitcoin is its market value in krónur at that moment, and the same amount becomes the cost basis of the ether.
• Average cost. If you bought the same crypto in several batches at different prices and sell part of it, the cost basis is the average purchase price.
• Mining. The cost basis of mined crypto is its value when it was mined. If it was never declared as income, the cost basis is ISK 0.

A simple example of the method

These figures are made up and only show how average cost works:

1. You buy 0.1 bitcoin and pay ISK 600,000 in total, including commission.
2. Later you buy another 0.1 bitcoin and pay ISK 1,000,000, including commission.
3. You now hold 0.2 bitcoin with a total cost basis of ISK 1,600,000. The average cost is ISK 800,000 per 0.1 bitcoin.
4. You sell 0.1 bitcoin for ISK 1,100,000. The capital gain is ISK 1,100,000 minus ISK 800,000, or ISK 300,000.
5. You are left with 0.1 bitcoin with a cost basis of ISK 800,000.

It's like household bookkeeping: without a receipt for each purchase, you don't know what you paid. Skatturinn publishes a more detailed worked example in its guide to the tax returnTax returnThe yearly report to Skatturinn on last year's income and your assets and debts at year end. Crypto must be declared, even if you sold nothing..

Losses

You may deduct a loss from selling crypto of the same type in the same year from your gains. You may not deduct a loss on one crypto from gains on another, such as a loss on ether from a gain on bitcoin. A loss caused by a lost or stolen code or key cannot be deducted either.

Where does it go on the tax return?

According to Skatturinn and its 2026 guide to the tax return:

• Capital gains go on page three of the return (Fjármagnstekjur ársins, capital income for the year), in section 3.9 "Annar söluhagnaður" (other capital gains), box 522. The calculation should be shown on an attachment to the return.
• Crypto holdings go on page four (Eignir og skuldir í árslok, assets and debts at year end), in section 4.4, box 15, at their market value at year end. This applies to all crypto you hold at the turn of the year, even if you sold nothing.

In its guide to the tax return, Skatturinn publishes year-end rates for some of the main cryptocurrencies. Sections and box numbers can change between years, so check each year's guide.

Capital income tax on gains is not withheld at source but paid afterwards, when tax is assessed. Municipal tax is not charged on capital income, but capital income is included when interest relief (vaxtabætur) and child benefit (barnabætur) are calculated. The capital income allowance of ISK 300,000 a year covers interest, and dividends and gains on shares in listed companies. Crypto is not on that list.

What records should you keep?

To work out your gains correctly, you need details of every purchase and sale. It's a good idea to keep:

• the date, type and amount of each purchase, sale and swap
• the price in krónur and the commission on each transaction
• transfers between your own wallets, to show the crypto didn't change owner
• the value of crypto you received as wages, as a gift or from mining, at the time you received it
• your holdings of each crypto and their market value at year end

Skatturinn's page on crypto doesn't say how long records must be kept. Bear in mind that average cost is based on every purchase of the same crypto, possibly many years back. Skatturinn can also reassess tax up to six years back↗ (in Icelandic).

If you trade on Myntkaup, you can export your transaction history and year-end statements as CSV or PDF in the web app (Færslur), or ask for them by email. If you use a foreign crypto exchangeCrypto exchangeA company or platform where you buy, sell and swap crypto, for example with krónur., download your history regularly, as access to it can disappear.

Where the guidance is unclear

Some things are not covered specifically on Skatturinn's crypto page. In these cases, ask your accountant or Skatturinn rather than guessing:

• StablecoinsStablecoinA cryptocurrency designed to keep a steady price, usually by tracking the US dollar or another currency. and exchange rate differences. On Myntkaup, USDCUSDCA stablecoin issued by the US company Circle that tracks the US dollar, so one USDC should always be worth about one dollar. is the account's base currency, and krónur you deposit are converted to USDC. Skatturinn includes USDC in its table of crypto rates, but doesn't say how exchange rate differences should be treated when USDC is converted back into krónur.
• StakingStakingLocking up crypto on a proof-of-stake network to help confirm transactions, in return for rewards paid in the same crypto., airdropsAirdropWhen a project sends free tokens straight to people's wallets, often to promote itself, though fake airdrops are also a common scam. and DeFiDeFi (decentralised finance)Financial services, such as lending, saving and trading, that run on smart contracts on a blockchain instead of through a bank or other middleman.. Skatturinn's page doesn't say how to treat crypto received this way.
• Which form to use. Skatturinn says the calculation should be shown on an attachment, but doesn't name a specific form for crypto. Its general page on capital gains refers to form RSK 3.02 (Kaup og sala eigna, purchase and sale of assets).

Closing thoughts

In Iceland, crypto gains are taxed under the general rules on capital gains. A tax liability can arise when you sell, swap or pay with crypto, the cost basis is the average purchase price if you bought in batches, and your holdings are declared at their market value at year end. Keeping good records of every transaction makes the tax return much easier.

This article only covers the general rules. Tax can be complicated and your own circumstances matter, for example if you trade a lot or receive crypto in ways other than buying it. Talk to your accountant or Skatturinn about your own situation.