South Korea Tax Authority Rushes to Finalize Crypto Tax Rules Ahead of 2027 Levy

South Korea's tax authority is set to release cryptocurrency tax guidelines in November, ahead of a 22% tax on qualifying gains that takes effect on January 1, 2027.

Staking, airdrops and decentralized finance remain the most contentious areas. Exchanges continue to face questions about the readiness of their reporting systems.

Scope of South Korea's 22% Crypto Tax

The tax applies to gains from transferring or lending digital assets that exceed an annual basic deduction of 2.5 million won (approximately $1,870). The national rate stands at 20%, climbing to 22% once the local income tax is included.

The rules come into force on January 1, 2027, and qualifying income will be classified as separate other income under the Income Tax Act.

Taxable income is determined after subtracting acquisition costs and transaction expenses, with annual gains and losses netted together before the basic deduction is applied.

Digital assets obtained before the rules take effect receive special handling. Their acquisition value is generally the higher of the original cost or the market value just before implementation. Investors who bought prior to 2027 should therefore maintain records of their original costs.

🇰🇷 South Korea Leads East Asia’s Crypto Economy

South Korea recorded $449.1B in crypto activity, leading East Asia by a wide margin, followed by Japan ($228.3B), Hong Kong ($192.2B), China ($176.3B), and Taiwan ($140.4B).

But each market is developing differently. Korea remains… pic.twitter.com/1KuBT8I1Tk

— ELYSIA (@ELYSIA_HQ) October 7, 2026

Investors will file returns for 2027 income in May 2028, when residents declare the previous year's earnings between May 1 and May 31.

Are Exchanges and Investors Ready for January?

On October 13, Commissioner Lim Gwang-hyeon told lawmakers during a parliamentary audit that the guidance would be published in November.

He stated that the agency was collaborating with exchanges and the Ministry of Finance and Economy to prepare their systems. The tax treatment depends on whether an activity involves transferring or lending digital assets.

“Once the law takes effect, we must receive data and begin verification starting from the tax returns filed in May 2028,” Lim said.

Exchanges discussed at the hearing include Upbit, Bithumb, Coinone, DigitalX and Gopax. Lawmakers raised concerns about whether their records would be consistent enough to meet the deadline, and transfers between private wallets remain the most difficult to track because no domestic exchange holds customer data for them.

Separately, Korean regulators ordered website blocks on 27 unregistered overseas exchanges, including KuCoin, MEXC and BingX.

🇰🇷HUGE: South Korea officially orders a block on 27 crypto exchanges, including KuCoin, BitMart and MEXC.

The Financial Intelligence Unit says the platforms never registered under Korea’s anti-money laundering law.

Their websites will be blocked for Korean users, and existing… pic.twitter.com/T0TT79hCgH

— Coin Bureau (@coinbureau) October 14, 2026

Opposition continues as well: a petition reached the 50,000 signatures needed for parliamentary consideration, and the People Power Party has proposed postponing the tax until January 2030.