South Korea Crypto Tax Guide 2026

South Korea classifies cryptocurrency gains as "other income" (기타소득) from virtual assets under the Income Tax Act. After multiple delays, the virtual asset income tax regime imposes a flat 20% tax (plus 2% local income tax, totaling 22%) on gains exceeding a ₩2.5 million annual basic deduction. The National Tax Service (NTS) has been building enforcement infrastructure, requiring Korean exchanges like Upbit, Bithumb, Coinone, and Korbit to report user transaction data. South Korea is one of the most active crypto markets globally, making tax compliance particularly important.

Virtual asset income is taxed at a flat rate of 20% (local income tax of 2% brings the effective rate to 22%). An annual basic deduction of ₩2.5 million (approximately USD 1,900) applies — only gains above this threshold are taxed. The gain is calculated as: disposal proceeds minus acquisition cost minus necessary expenses (transaction fees). Capital losses can offset capital gains within the same tax year, but cannot be carried forward to future years. Crypto-to-crypto trades are taxable events.

South Korea uses the FIFO (First In, First Out) or the moving average method for cost basis calculation, with taxpayers required to choose one method and use it consistently. The cost basis includes the purchase price plus any transaction fees, gas fees, and other acquisition costs. If the acquisition cost cannot be determined (e.g., for very old purchases), the NTS may allow the use of the market value on a specified prior date as a deemed acquisition cost. All calculations are performed in KRW.

Korean crypto exchanges are required to withhold tax on behalf of resident users and remit it to the NTS. For transactions on foreign exchanges (Binance, Coinbase, etc.), taxpayers must self-report and pay through the annual income tax return. The reporting period follows the calendar year, with tax returns due in May of the following year. Non-residents earning virtual asset income from Korean sources are also subject to withholding at 22%. Korean exchanges must file annual reports detailing all user transactions.

Staking rewards and mining income are treated as virtual asset income (not as separate business income) for individual investors. They are valued at the KRW fair market value when received, which becomes the cost basis for future disposal. If mining is conducted as a business, separate business income taxation may apply. Airdrops and hard fork tokens are taxable at their fair market value when they become tradeable. DeFi yields and lending interest are similarly classified as virtual asset income.

Taxxy calculates crypto gains using FIFO and tracks the ₩2.5 million basic deduction. All values are converted to KRW using historical exchange rates. The platform generates income calculations compatible with NTS reporting requirements, separating domestic exchange gains (subject to withholding) from foreign exchange gains (requiring self-reporting). Taxxy also aggregates transactions across multiple exchanges for accurate annual gain calculations.