Digital Nomad

Understanding Korea’s New Crypto Income Tax: What to Know Before 2027

Crypto gains in South Korea will be taxed starting Jan 1, 2027. These changes have key implications for holders—here’s how to plan ahead.

By NomadicTax Research Team • 5-8 min read • August 27, 2026

## Overview South Korea passed amendments to its Income Tax Act in **December 2024**, which delay the **crypto income taxation** regime until **January 1, 2027**. From that date, gains or income from **‘virtual assets’** (가상자산) will be taxed separately as **other income (기타소득)**. ([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) ## Who’s Covered - **Residents**: Anyone classified as a tax resident in Korea, even if they hold crypto abroad. Gains from **selling or lending** crypto are taxed. ([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) - **Non-residents**: Different rules may apply depending on treaty and domestic rules, but the “other income” system generally doesn’t cover them in the same way. (Check local guidance.) ## What “virtual asset” means Defined under the “Virtual Asset Use and User Protection Act” as an electronic instrument with economic value that can be transferred—but with certain exclusions like game loot, prepaid electronic currency, electronic registration shares, etc. ([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) ## How Income Will Be Calculated - **General rule**: your proceeds from transfer or loan, minus actual acquisition cost and reasonable transaction costs. ([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) - If **actual acquisition is unclear or proof is lacking**, the law allows assuming **up to 50% of the transfer proceeds** as cost. No separate ancillary costs allowed under this exception. ([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) - For crypto acquired already before 2027, the cost basis will be the larger of the **fair market value as of December 31, 2026** or the actual acquisition price. ([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) ## Tax Rates and Exemptions - Flat **20% rate** on “other income” from crypto gains (기타소득) after deductions. ([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) - **Basic deduction (“공제”)**: ₩2.5 million per year. ([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) ## Reporting and Compliance - Crypto gains are reported during the **annual comprehensive income tax filing period** (May 1-31). ([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) - Be sure to **document acquisition cost**, transaction fees, date of acquisition, and date of disposal or loan. If records are missing (e.g. for crypto held long ago), the “50% cost inference” rule may apply—but may be harder to justify without clear documentation. - For crypto held pre-2027, make sure to determine fair market value as of December 31, 2026—ideally using prices from “price-publicizing virtual asset businesses” or regulated exchanges. ([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) ## Practical Planning Tips 1. **Decide whether to sell before Dec 31, 2026**, if you expect cost basis to be lower than anticipated 2026 price—because that date sets the valuation floor. 2. **Keep clean transaction records** using wallet exports, exchange statements, etc.—these will help avoid worst outcomes under inferred cost rules. 3. **Watch for guidance on presidency decrees**—many implementation details, like “difficulty of cost proof,” are left to presidential regulation. These can significantly affect how favorable or strict the rules are. 4. **Integrate crypto income in overall tax planning**, since “other income” is separate—may change your total liabilities differently than business or capital income. ## Example Scenario Let’s say you acquired crypto in 2025 for ₩10 million, spent ₩500,000 in transaction fees, and sell it on February 2027 for ₩30 million (minus ₩1 million fees). Actual cost basis is ₩10.5 million. Other income = ₩30 million - ₩10.5 million = ₩19.5 million. Apply ₩2.5 million basic deduction → taxable: ₩17 million. Tax = 20% ⇒ ₩3.4 million. If cost proof is missing, you may instead assume a **50% cost inference** → cost = ₩15 million → taxable: ₩30M - ₩15M - ₩2.5M = ₩12.5M → tax ₩2.5M (lower cost basis benefit, but riskier without proof). ## Why It’s High Impact This change is **high impact**, particularly for frequent traders or those with large holdings: deferred until 2027 gives planning time, but once effective, transparency and record-keeping become crucial. For high-net-worth individuals considering departure or shifting residence, see the exit tax rules too (“국외전출세”, discussed in another article).