Tax treatment of cryptocurrency varies significantly from country to country, and rules continue to evolve. The explanation below describes general patterns seen in many jurisdictions; it is not tax advice, and it may not reflect the specific rules where you live. Always confirm your obligations with a qualified tax professional familiar with your local law.

In most jurisdictions that have issued guidance, selling crypto for fiat currency (like dollars or euros) is treated as a taxable event, typically generating a capital gain or loss based on the difference between what you paid for the asset and what you sold it for.

Trading one cryptocurrency directly for another - for example, swapping Bitcoin for Ethereum - is also commonly treated as a taxable disposal in many jurisdictions, even though no traditional currency changed hands. Each side of the trade is often viewed as if you sold one asset and immediately bought the other at its market value.

Simply holding crypto that has gone up in value, without selling or trading it, is generally not a taxable event in most jurisdictions - unrealized gains typically aren't taxed until you dispose of the asset in some way. That said, other activities can create taxable income even without a sale, such as receiving staking rewards, mining rewards, airdrops, or crypto as payment for goods or services; these are frequently treated as ordinary income at the time you receive them.

Because crypto transactions can be numerous and span multiple wallets and platforms, keeping clear records is essential: the date of each transaction, the cost basis (what you originally paid, including fees), and the fair market value at the time of any sale, trade, or income event. Many people use dedicated crypto tax software to reconstruct this history, since exchanges may not always provide complete records, especially after transfers between platforms.

Because the rules are jurisdiction-specific and change over time, the safest approach is to keep thorough records as you go and consult a qualified tax professional rather than relying on general information like this article to file your return.