When tax is due
From 1 January 2026 these moves count as a sale of crypto:
- Selling crypto for euros or another currency.
- Swapping one coin for another, also for a stablecoin such as USDC or USDT.
- Paying for goods or services with crypto.
Not a sale
- Buying crypto with euros.
- Moving coins between your own exchange accounts and wallets.
- Holding coins, however much their value rises.
Which coins did you sell? First in, first out
When you sell part of your coins, the oldest coins on that exchange or account count as sold first (first in, first out, per exchange or account). Their purchase value decides your gain.
Airdrops
Coins you received for free in an airdrop have no purchase price: when you sell them, the whole sale price counts as gain.
Swaps add up
Because every swap counts, swapping between coins or into stablecoins can create taxable gains even if you never withdraw euros. The free tax estimate reads every swap in your exchange files and shows the gain per move.