Crypto Tax Basics: Gains, Losses and Cost Basis

BullCalc Team · October 11, 2026 · 2 min read

Taxes are the least exciting part of crypto, but ignoring them can be expensive. Rules are different in every country, so this guide covers the basic ideas that appear in many tax systems, not the law where you live.

Capital gains

In many countries crypto is treated as property or an asset. When you sell it for more than you paid, the difference is a capital gain, and it may be taxed. When you sell for less, you have a capital loss, which in some places can reduce tax on other gains.

Cost basis

Your cost basis is what you paid for the crypto, usually including fees. If you bought in several parts, the rules decide which purchase is matched with each sale. Common methods are first in, first out (FIFO) and average cost. The method can change your taxable gain a lot.

Common taxable events

Depending on the country, these may count as taxable:

• Selling crypto for regular money.
• Swapping one coin for another.
• Paying for goods or services with crypto.
• Receiving staking, mining or interest rewards (often taxed as income).

Moving coins between your own wallets is usually not a sale, but keep records anyway.

Holding period

Some countries tax assets held longer than a certain time (often one year) at a lower rate or not at all. Others treat all gains the same. Check the rules that apply to you.

Keep good records

• Date, amount and price of every buy and sell.
• Fees paid on each transaction.
• Exports of trade history from each exchange, saved every year.

Estimate before you sell

A quick estimate helps you avoid surprises. The crypto tax calculator takes your cost, sale value, fees and your own tax rate and shows the gain and estimated tax.

This article is general information. For your situation, check your local tax authority's guidance or speak to a tax professional.

This article is for education only and is not financial advice.