Tax Planning

Navigating South Korea’s New Crypto Tax Regime: What Individuals Need to Know Before 2027

With South Korea moving forward with separate taxation on virtual asset gains starting January 1, 2027, residents and non-residents alike face major changes in how crypto gains are taxed—understanding the details now can save you thousands.

By NomadicTax Research Team • 5-6 min read • August 22, 2026

## Overview of the Upcoming Crypto Taxation Changes South Korea passed an amendment to the Income Tax Act in December 2024 mandating that **gains from the disposition or lending of virtual assets** will be separately taxed as “other income” starting **January 1, 2027**. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) Both residents and non-residents will be impacted for any crypto gains from that date. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238936&mi=40371&utm_source=openai)) ### Key Rules for Residents - All gains from selling or lending crypto will be **separately taxed at a flat rate of 20%**, following a deduction of acquisition cost and allowable costs. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) - For crypto assets held before 2027 whose acquisition costs are hard to determine, the **acquisition cost will be the greater of actual cost or fair market value as of December 31, 2026**. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) - A **250,000 KRW deduction** applies annually before applying the 20% rate. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) ### For Non-Residents and Foreign Entities - If you are a non-resident or foreign corporation and gain arises from selling, lending, or withdrawing crypto within South Korea or via a Korean crypto-service provider, it is **considered domestic-source “other income”**. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238936&mi=40371&utm_source=openai)) - A **withholding tax** applies on amounts derived via a crypto business; either 10% of gross proceeds or 20% of the net gain, whichever is lower, must be withheld and remitted. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238936&mi=40371&utm_source=openai)) - If a tax treaty applies that allows exemption or relief, non-residents may apply accordingly. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238936&mi=40371&utm_source=openai)) ## Reporting Obligations for Crypto Businesses Crypto exchanges and businesses that receive licensing under the “Specific Financial Transaction Information Act” (특금법) must file **transaction reports and summary statements** on a quarterly basis, starting with transactions from **January 1, 2027**. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238937&mi=40372&utm_source=openai)) This applies both for income tax (개인) and corporate income tax cases. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238937&mi=40372&utm_source=openai)) ## Practical Planning Tips - If you hold crypto assets before end of 2026 and their cost basis is ambiguous, document acquisition dates, values, transaction fees; consider valuing them using **December 31, 2026 fair market values** if difficult to trace actual cost. - Non-residents using Korean exchanges should be mindful of **withholding tax rates**, maintain documentation for treaty benefits, and consider timing of transfers or contract structures to minimize taxable domestic-source gains. - Keep records of all **transactions, fees, dates, exchanges used**, and if possible use services compliant with Korean reporting laws; this ensures that crypto-business report filing obligations from 2027 onwards are met without penalty. ## Actionable Example > **Resident Case:** You bought 1 ETH in 2022 for ₩2,000,000. On March 1, 2027, you sell it for ₩5,000,000. Acquisition cost is clearly ₩2,000,000. So net gain is ₩3,000,000 minus any transaction fees. After the ₩250,000 deduction, the remaining gain is taxed at 20%. You’ll owe ≈ ₩550,000 in tax. > **Non-Resident Case:** You are living abroad, but you trade on a South Korean exchange in 2027, selling virtual asset holdings for ₩10,000,000. Assume your cost basis is ₩7,000,000 with no available expenses to reduce it. The exchange will withhold either 10% of gross proceeds (₩1,000,000) or 20% of net gain (₩600,000). Since ₩600,000 < ₩1,000,000, ₩600,000 gets withheld unless a tax treaty allows lower rate. ## Conclusion South Korea’s crypto tax regime change in 2027 is sweeping: both residents and non-residents must prepare. Clear documentation, understanding withholding rules, and staying current with obligations are key. If you deal with virtual assets regularly or have holdings, consider getting ahead of compliance today. Consultation with a tax professional familiar with Korean crypto laws is strongly advised.