Compliance
Preparing for Korea’s Crypto Tax Overhaul: What Residents and Non-Residents Must Know
South Korea’s new crypto tax rules start January 1, 2027 — this article explains how your digital assets will be taxed, how to calculate base and gains, and what non-residents should be aware of.
By NomadicTax Research Team • 5-8 min read • August 11, 2026
## Context: What’s Changing in Korea’s Crypto Tax Regime
The National Tax Service’s (NTS) published guidelines in recent weeks make clear that **from January 1, 2027**, all gains from the **sale, exchange, or lending of virtual assets (cryptocurrencies, tokens, etc.)** by **residents** will be taxed as ** 기타소득 (other income), separately assessed** rather than being lumped with salary or capital gains. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) For **non-residents or foreign legal entities**, similar activities involving domestic virtual asset service providers will be taxed at source under a withholding scheme. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238936&mi=40371&utm_source=openai))
## Key Rules Every Crypto Holder Should Understand
| Topic | Details | Why It Matters |
|---|---|---|
| **Acquisition cost baseline** | If you held crypto *before* Jan 1, 2027, your base cost for calculating gains will be the higher of (a) original purchase cost or (b) the market-price (“시가”) at **December 31, 2026**. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) | Locks in a usable value to reduce taxable gains for early adopters, especially if crypto has surged in value. |
| **Cost accounting method** | For crypto acquired *after* the start date, you may use **moving-average cost method** or **FIFO (first in first out)** to track acquisition cost — depending on your wallet or account. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) | Different methods can lead to materially different taxable gains particularly in volatile markets. |
| **Deductible expenses / 필요경비** | Generally includes acquisition cost and transaction costs. But if costs are difficult to document, you may apply a **deemed expense** equal to a percentage of gross proceeds (up to 50%), but no separate incidental costs allowed in that case. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) | People using decentralized exchanges, peer-to-peer trades, or non-custodial wallets should carefully document fees, or accept more conservative deemed expense. |
| **Tax rate & minimum threshold** | Tax rate is fixed at **20%**, with a **basic exemption of KRW 2,500,000** (per year) in other income for residents. ([nts.go.kr](https://www.nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238935&mi=40370&utm_source=openai)) | If your net crypto gains are under exemption, you may avoid tax entirely; otherwise, plan for withholding or provisional payments. |
## Implications for Non-Residents & Foreign Entities
- If you are a **non-resident or foreign legal entity** and generate crypto income via domestic VASPs (virtual asset service providers), those providers are required to withhold tax at either a flat rate or based on the listed formula (whichever yields higher). ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238936&mi=40371&utm_source=openai))
- If your home country has a **tax treaty** with Korea, you may be eligible for **reduced withholding** or **exemptions**, especially for passive income or gains. Be ready to file a **비과세·면제 신청서 (tax treaty application)** with the Korean provider. ([nts.go.kr](https://nts.go.kr/nts/cm/cntnts/cntntsView.do?cntntsId=238936&mi=40371&utm_source=openai))
## Practical Steps Now
1. **Inventory your crypto holdings as of Dec 31, 2026** — note acquisition cost, date, transaction fees. If records are missing, the market-price fix will apply.
2. **Decide your cost method** – moving average vs FIFO; plan when to sell or lend.
3. **Estimate annual gains** vs exemption threshold to budget for taxes.
4. **Document everything**: wallet transfers, transaction costs, exchange fees.
5. If non-resident, check treaty status with Korea, and prepare to file necessary forms with the VASP.
## Case Example
- Alice bought 1 ETH in 2021 for KRW 300,000. On December 31, 2026, its market price is KRW 1,000,000. If she sells 1 ETH for KRW 2,000,000 in mid-2027: authoritatively, her acquisition cost is the **higher** value of original cost vs Dec 31, 2026 price → so KRW 1,000,000.
- She has KRW 2,000,000 proceeds less acquisition cost KRW 1,000,000 = KRW 1,000,000 gain. Thereafter deduct costs (fees etc.). If under exemption KRW 2.5M, no tax; otherwise taxed 20% on net gain.
## Summary: Don’t Wait — Take Action Before 2027
This transformative change gives you just a few months to prepare your records and adjust. Proper planning now can significantly reduce surprises and optimize your tax position when the new regime kicks in on **January 1, 2027**.