Compliance
Navigating Korea’s New Crypto Tax Rules: What You Need to Know Before 2027
Major crypto tax reforms arrive in South Korea with new thresholds, methods of calculating cost basis, and filing deadlines starting 1 January 2027.
By NomadicTax Research Team • 5-8 min read • August 12, 2026
## Overview of Korea’s Upcoming Crypto Tax Regime
South Korea’s National Tax Service (국세청) confirms that from **January 1, 2027**, gains from virtual asset (crypto) transactions will be taxed as **separated other income (기타소득, 분리과세)** under the revised Income Tax Act.([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) This means both individuals and businesses who trade, lend, or otherwise monetize crypto assets will need to adhere to formal tax reporting separate from regular earned income. The revision made by parliament in December 2024 delayed enforcement until this date.([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai))
## Key Changes & Rules You’ll Want to Understand
Here are the major changes and methods to plan ahead effectively:
| Change | Details & Implications |
|---|---|
| **Effective Date** | Crypto transfers and lending occurring from **2027-01-01** are taxable under the new rules.([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) |
| **Cost Basis for Acquisitions** |
- For crypto acquired **after** enforcement begins, you use the actual acquisition cost plus transaction/broker fees.([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai))
- If actual cost can’t be established, a **“deemed expense” up to 50%** of the proceeds may be allowed (but notarized or determined by grouping similar assets). All other acquisition-related costs (beyond that deemed amount) are excluded.([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai))
- For crypto held prior to implementation (i.e. before 2027-01-01), the cost basis will be **either the actual acquisition cost or the fair market value at** **2026-12-31**, whichever is **higher**.([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) |
| **Excluded Assets** | Certain types won’t be taxed, such as in-game items, some utility tokens, and tokens defined as “prepaid electronic payments” or “electronic equivalents of fiat/tangible items” under the Virtual Asset User Protection Act.([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) |
| **Annual Basic Deduction & Rate** | There will be an **annual basic deduction (과세최저한)** of KRW 2,500,000 from combined crypto gains. Above that, a flat rate of **20%-tax** on net gains will apply.([g.nts.go.kr](https://g.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) |
## Practical Examples & Planning Strategies
- **Example 1: Holding from 2025** — If you bought Bitcoin in 2025 and hold it through 2027, your cost basis will be **the higher of your actual purchase price or its market value on December 31, 2026**. This protects you in inflationary or volatile markets. |
- **Example 2: No records of past costs** — If you traded several altcoins and sold some before record-keeping was instituted, and you can’t reconstruct actual acquisition costs, you may use up to 50% deemed cost for similar assets. But this means you forgo digitized microexpenses like small fees. |
- **Example 3: Lost wallet** — Even if you lose a private key or wallet, if you can’t prove acquisition costs, the deemed cost method may still apply — but aggressively maintain trade logs, wallet addresses, and exchange statements to avoid losing out. |
## Actionable Advice for Crypto Users & Advisers
- From now until December 31, 2026, document everything — purchase receipts, broker fees, gas or transaction costs, and when assets entered your wallet. Those will be crucial for determining basis. |
- Begin tracking crypto address-level cost basis and ensure you can separate **activity before** 1 January 2027 vs **after**. |
- Plan trades only if net profit after all costs will exceed the KRW 2,500,000 threshold. Small-scale sellers may stay under the deduction and avoid tax. |
- Get familiar with **other income (기타소득)** reporting. Even though separated taxation simplifies withholding at source, you’ll still need to report net gains during annual filing—due in May following the taxable year. |
## Long-Term Implications
- The shift to transparent crypto taxation reflects Korea’s aim to stabilize its tax base and comply with international tax norms. |
- Crypto exchanges will likely be required to collect more data, report gains and losses, and potentially assist with tax withholding or information exchange. |
- Investors who move assets across borders should consider double tax treaty implications, as gains treated as other income may complicate foreign tax credits.
— NomadicTax Research Team