Tax Planning
Planning for South Korea’s New Crypto Tax Regime Effective Jan 1, 2027
With South Korea introducing a fully-separate taxation scheme for virtual asset gains in 2027, individuals must plan now to avoid surprises—especially around needed documentation and tax rates.
By NomadicTax Research Team • 5-8 min read • August 24, 2026
## What’s Changing in Crypto Taxation
Starting **January 1, 2027**, South Korea will begin taxing **virtual asset (crypto) gains** for **residents** under a **separate income tax** category, distinct from other income classes. Under the amended Income Tax Act (2024), crypto income from **transfer** or **lending** (including withdrawal) of virtual assets will be treated as **other income**. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai))
Here are key features of the regime:
| Area | Rule |
|---|---|
| Rate | Flat **20%** on total gains, after deductions/expenses. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) |
| Minimum deduction | An **annual basic deduction of ₩2,500,000** (KRW) applies, similar to other “other income.” ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) |
| Cost basis rules for prior holdings | For crypto held before the regime, you may elect the **higher of the market-value or actual cost** as the basis. If actual cost cannot be determined later, expenses up to **50% of gross proceeds** may be deemed. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) |
## Implications for Non-Residents & Foreign Entities
Non-residents or foreign corporations who generate crypto income by trading, lending or withdrawing crypto **in Korea** will have their crypto income treated as **domestic-source other income**, subject to **withholding tax by virtual asset service providers (VASPs)**. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238936&mi=40371&utm_source=openai))
VASPs are required to withhold at either:
- 10% of the **gross transfer value**, or
- 20% of the **net gain** over cost and allowable expenses,
depending on which produces a higher result. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238936&mi=40371&utm_source=openai))
If the taxpayer resides in a country with a tax treaty with Korea, they may be able to submit an exemption or reduction request. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238936&mi=40371&utm_source=openai))
## Actions You Can Take Now for Better Tax Planning
1. **Document acquisition cost and dates**
- Keep detailed crypto purchase records—exchange statements, fees, timestamps. This will support your cost basis if actual cost is used.
- For crypto held before 2027, gather proof to support the higher of cost or market value. Without proof, you may be limited to deemed expenses of up to **50%**. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai))
2. **Estimate gains vs. simple withholding**
- If non-resident and using a VASP in Korea, calculate if the withholding (10% vs 20% rule) yields lower tax than your home country’s tax rates after treaty relief.
3. **Plan timing of disposals or transfers**
- Because the regime kicks in 2027, deferring certain transfers until after January may offer clearer treatment, but consider risks of market movement or changes in legislation.
4. **Consider residency status**
- Stay aware: whether you're considered a **resident** (tax on worldwide crypto gains under this new regime) or **non-resident** (tax only on Korean-source crypto income) matters. Residence is based on the 183-day rule and domicile/address. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai))
5. **Prepare for annual filing changes**
- Crypto gains will be declared as other income during **comprehensive income tax returns** in May each year. Make sure your tax advisor knows about the changes. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai))
## Practical Example
Say **Jane**, a resident, bought 2 BTC in 2025 for ₩30M each, sold one in 2027 for ₩50M, and lent the other for a fee in 2028. Her tax for 2027: she reports the gain (₩50M minus ₩30M cost minus expenses) times 20%, after the ₩2,500,000 deduction. The lending income in 2028 will also fall under other income and taxed at 20%.
## Common Misconceptions
- **“Crypto gains mean no expenses allowed.”** Wrong: transaction fees and intermediary costs qualify, and pre-2027 holdings may allow a deemed expense if actual cost is not provable. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai))
- **“All crypto transactions are automatically taxed at 20% on gross proceeds.”** Only for non-residents with domestic source income via VASPs; residents’ gains are net of cost/expenses. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai))
## Keep an Eye On
- Final presidential administration orders and **presidential decrees** that clarify “type of VASPs,” “delegated authorities,” or “exclusion categories.”
- Potential treaty updates that adjust withholding or domestic treatment. For example, if your home country has a treaty with Korea, they may negotiate equitable relief for double taxation.
**Bottom line:** Whether you’re a resident or non-resident, a company, or a private investor—South Korea’s crypto tax rules coming into force 2027 require you to act well ahead. Solid documentation, understanding of cost basis, and planning for filing timelines will minimize risk and surprise liabilities.