The short version
The kimchi premium is the difference between what a cryptocurrency costs on South Korean exchanges and what it costs on overseas exchanges. When Bitcoin trades for ₩147 million on Upbit, Korea's largest exchange, versus $100,000 on Binance with the won at 1,400 per dollar, the kimchi premium is 5%.
Named after Korea's staple side dish, the premium has been around since Bitcoin's early years — and it has proved remarkably persistent, because arbitrage, which normally closes price gaps like this within seconds, is unusually hard to execute in Korea. That makes it more than a curiosity: the kimchi premium is a closely watched indicator of demand in South Korea's crypto market, where retail trading activity can become unusually intense during rallies.
How it's calculated
Premium (%) = ( Korean price in KRW ÷ ( global USD price × USD/KRW exchange rate ) − 1 ) × 100
Say Bitcoin trades at $100,000 on Binance and the won sits at 1,400 per dollar. The implied Korean price would be 140,000,000 KRW. If Upbit shows 147,000,000 KRW instead, the premium is 5%. When the Korean price falls below the global reference price, the result is called a kimchi discount — or, translated from the Korean term, a "reverse premium."
Why does the kimchi premium exist?
Price gaps between exchanges normally vanish in seconds — arbitrage bots buy on the cheap venue and sell on the expensive one until the gap closes. The kimchi premium survives because Korea's market structure blocks that mechanism in several ways at once:
- Foreign-exchange rules. South Korea has FX regulations and reporting requirements that can make large cross-border transfers cumbersome. Moving large sums abroad to buy crypto — or repatriating the proceeds — can trigger reporting obligations and additional banking friction.
- Restricted access to Korean exchanges. Access to Korean won markets is gated by KYC, residency and real-name banking requirements: trading KRW pairs requires a verified Korean bank account in the trader's own name. That makes it difficult for overseas traders to sell into Korean demand and arbitrage the gap.
- Retail-heavy demand. Korea is widely regarded as one of the most active retail crypto markets in the world, with trading historically concentrated in spot markets — altcoins very much included. When sentiment turns bullish, local buying pressure hits a market that outside supply can't easily reach.
- Limited KRW liquidity outside Korea. There is no deep offshore market for KRW-denominated crypto trading comparable to the global dollar markets. That limits the channels through which price discrepancies can be arbitraged away.
The result: a persistent, measurable gap that widens and narrows with Korean demand — exactly the kind of signal traders like to watch.
A brief history of the premium
- January 2018: at the peak of the ICO-era mania, Bitcoin traded for roughly 50% above global prices on Korean exchanges. The divergence was extreme enough that CoinMarketCap removed several Korean exchanges from its price averages.
- Early 2021: the premium spiked above 20% during that spring's bull run, then collapsed within weeks — a cycle that has repeated in smaller form many times since.
- Calm markets: during quieter periods the premium has generally been much smaller, often hovering in the low single digits either side of zero, drifting with the exchange rate and local demand.
Sustained double-digit premiums have often coincided with overheated local markets — not because the premium causes the top, but because both tend to reflect the same surge in retail demand.
What the kimchi premium tells you
Most people tracking the premium aren't trying to arbitrage it — they're reading it as a demand gauge:
- Rising premium — can signal stronger buying from Korean traders, particularly during bullish periods.
- Premium collapsing or going negative — local demand may be weakening, or the Korean market is seeing selling pressure before other markets. Kimchi discounts tend to appear during sharp sell-offs.
- Unusually large premium — can be a warning sign of an overheated local market. When Korean prices are propped up mainly by the premium, a rapid narrowing can put downward pressure on Korean prices even while global prices hold steady.
- Per-coin divergence — the premium isn't uniform. A single altcoin showing an outsized premium usually reflects thin local liquidity or Korea-specific interest in that coin, not a market-wide signal.
Why arbitrage doesn't close the gap
On paper the trade is simple: buy Bitcoin on Binance, send it to a Korean exchange, sell it at the premium, pocket the difference. In practice, the friction is the point. Non-resident foreign traders cannot simply open a Korean won account and move funds through the domestic banking system to capture the spread. Korean traders face KYC, Travel Rule and banking requirements that add friction to transfers — plus the risk that the premium fades before a transfer completes. Even Alameda Research, which famously exploited a similar premium in Japan in 2017–18, reportedly found the Korean trade difficult to scale because moving the resulting won out of the country was so constrained.
For a step-by-step look at the mechanics — and why the costs eat most of the theoretical edge — see our guide to kimchi premium arbitrage.
How to track the kimchi premium live
Coinyong's live kimchi premium tracker computes the premium in real time from Upbit prices, Binance prices, and the current USD/KRW rate. The full dashboard extends that to 100+ coins with per-exchange price comparisons, and includes related market data such as funding rates, long/short ratios and liquidation data.
A few indicators worth reading alongside the premium: USDT/KRW (a persistent premium on Tether against the official exchange rate can also indicate strong local demand for crypto exposure), Bitcoin dominance (a widening premium while dominance falls is often observed when Korean volume rotates into altcoins), and spot volume (a premium accompanied by rising volume is generally a stronger demand signal than one occurring in thin trading).