KuCoin is a major cryptocurrency exchange known for its broad altcoin selection, trading bots and derivatives. Its low trading fees and access to smaller tokens remain competitive, but two events are essential to any 2026 assessment: KuCoins 2025 U.S. criminal guilty plea and its major 2020 security breach.
This KuCoin review finds a feature-rich exchange that may suit experienced users in supported jurisdictions. However, its regulatory history and centralized custody risk make it less suitable for users seeking strong domestic regulatory protection.
KuCoin at a glance
| Category | Assessment |
|---|---|
| Founded | 2017 |
| Main strength | Altcoin selection and trading tools |
| Standard Class A spot fee | 0.10% maker / 0.10% taker |
| Higher spot fee classes | Up to 0.30% at VIP 0 |
| Proof of reserves | Yes |
| Major security incident | 2020 hot-wallet hack |
| Major regulatory event | 2025 U.S. guilty plea |
| U.S. access | KuCoin agreed to exit the U.S. market for at least two years |
| Main risks | Regulatory history, custody, altcoin liquidity and derivatives risk |
Altcoins, products and fees
KuCoin launched in 2017 and built much of its reputation around listing a large number of cryptocurrencies. It offers spot and margin trading, perpetual futures, trading bots, copy trading, P2P and yield-related products where available.
Its broad token catalogue can be useful for traders looking for assets not yet listed on larger or more conservative exchanges. The trade-off is that smaller markets may have lower liquidity, wider spreads and greater delisting risk.
KuCoins 2026 VIP schedule lists Class A spot trading at 0.10% maker and 0.10% taker for VIP 0 users. Class B and Class C markets are more expensive, at 0.20% and 0.30% respectively at VIP 0. Futures use a separate fee schedule.
At 0.10%, a 15,000 USDT spot trade costs approximately:
15,000 × 0.10% = 15 USDT
KuCoin Token (KCS) can provide fee-related benefits, but holding KCS creates additional token-price exposure. A small trading discount should not be evaluated separately from the risk of the asset used to obtain it.
Withdrawal fees also vary by asset and network. For smaller balances, the withdrawal cost can matter more than the trading commission.
The 2025 U.S. guilty plea
KuCoins most important regulatory event occurred on January 27, 2025.
PEKEN Global Limited, a Seychelles-based entity operating KuCoin, pleaded guilty in the United States to operating an unlicensed money-transmitting business. It agreed to forfeit $184.5 million and pay a criminal fine of approximately $112.9 million, bringing the total monetary penalties to more than $297 million.
KuCoin also agreed to exit the U.S. market for at least two years, while co-founders Chun Gan and Ke Tang agreed to leave KuCoin management and operations.
According to the U.S. Department of Justice, KuCoin had failed to implement effective AML and KYC controls, register appropriately with FinCEN and report suspicious activity. The DOJ said the exchange served approximately 1.5 million registered U.S. users between 2017 and March 2024.
This matters because KuCoin had historically attracted users partly through relatively limited identity requirements. That should not be viewed as an advantage today.
Users should provide their real identity and country of residence and confirm that KuCoin services are available in their jurisdiction. U.S. residents should not attempt to circumvent KuCoins U.S. exit through a VPN, third-party account or false residency information.
The 2020 KuCoin hack
KuCoin also has a significant security incident in its history.
On September 26, 2020, attackers obtained access to KuCoin hot-wallet private keys and transferred BTC, ETH and numerous other tokens from the exchange. KuCoin later estimated the affected assets at approximately $285 million, while Chainalysis estimated that more than $275 million had been stolen.
KuCoin responded by replacing its affected wallet infrastructure and working with exchanges, token projects and law-enforcement agencies to trace and recover funds. The company said affected customer assets would be covered by KuCoin and its insurance fund.
A substantial share of the stolen assets was eventually recovered or frozen. The incident therefore did not result in a permanent customer haircut, but it remains evidence of the risks associated with centralized exchange custody.
It also produced a controversial side effect: some token issuers froze or replaced affected tokens, demonstrating that certain crypto assets can contain significant issuer-level control.
Proof of reserves and security
KuCoin now publishes regular proof-of-reserves (PoR) data using Merkle-tree verification.
Its July 31, 2026 snapshot reported:
- BTC: 112% reserve ratio
- ETH: 121%
- USDT: 116%
- USDC: 122%
KuCoin also allows users to verify whether their account balance was included in the reserve snapshot.
These figures are useful transparency indicators, but PoR is not the same as a complete financial audit. It demonstrates reported assets against covered customer balances at a particular time; it does not necessarily reveal every corporate liability, debt or off-chain obligation.
KuCoin account-security tools include authenticator 2FA, a separate trading password, anti-phishing protections, device controls and withdrawal-security settings.
For API-based trading, withdrawal permissions should normally remain disabled and IP restrictions should be enabled. Unused API keys should be deleted.
KYC and withdrawal risks
KuCoin tightened its KYC requirements in 2023, making identity verification mandatory for new users and restricting functionality for existing unverified accounts.
Users who originally opened an account under older, lighter KYC rules should not assume those rules still apply. Exchanges can request additional identity, source-of-funds or transaction information during a compliance review.
Withdrawals may also be delayed after security changes, unusual logins, compliance checks or blockchain maintenance.
Never buy or use a pre-verified KuCoin account. If the account identity does not match the real owner, recovering funds during a compliance review can become substantially more difficult.
For large withdrawals, verify the network and address and consider making a small test transfer first.
Is KuCoin safe？
KuCoin presents a mixed risk profile.
On the positive side, it has operated since 2017, recovered from the 2020 security breach without imposing a customer loss, publishes regular reserve data and provides a relatively mature set of account-security controls.
On the negative side, the 2020 hack demonstrated significant historical custody risk, while the 2025 criminal resolution confirmed serious historical AML and licensing failures.
Neither event alone proves that KuCoins current systems are unsafe. But both should carry meaningful weight when comparing KuCoin with exchanges operating under clearer domestic regulatory frameworks.
Who should use KuCoin？
KuCoin may suit experienced non-U.S. traders who:
- want access to a large number of altcoins;
- use trading bots or advanced trading products;
- understand liquidity and delisting risk;
- can verify that KuCoin is available in their jurisdiction.
It is less suitable for users who prioritize strong domestic regulation, simple fiat banking or long-term exchange custody.
Beginners should also be cautious with KuCoins leveraged products. Competitive trading fees do not reduce liquidation risk.
Verdict
KuCoin remains a significant exchange in 2026 because of its large altcoin catalogue, competitive fees and broad trading toolkit.
But its risk history is unusually important.
The 2025 guilty plea established that KuCoin had previously operated with major U.S. AML and licensing deficiencies. The 2020 hack showed that its custody infrastructure had once suffered a serious compromise, even though users were ultimately protected from the loss.
At the same time, KuCoins current proof-of-reserves program provides useful transparency: its July 2026 snapshot showed more than 100% reported reserves for BTC, ETH, USDT and USDC.
For eligible experienced traders, KuCoin can still be useful for altcoin access and active trading. The safer approach is to complete KYC honestly, verify regional eligibility, use strong account security, test withdrawals and avoid keeping more assets on the exchange than are needed for trading.
Low fees and market relevance are positives—but they do not erase KuCoins regulatory or security history.
FAQ
What are KuCoin's trading fees？
KuCoin VIP 0 Class A spot markets generally charge 0.10% maker and 0.10% taker. Class B and Class C pairs can carry higher fees.
What happened in the KuCoin DOJ case？
On January 27, 2025, KuCoin operator PEKEN Global Limited pleaded guilty to operating an unlicensed money-transmitting business and agreed to penalties totaling more than $297 million. KuCoin also agreed to exit the U.S. market for at least two years.
Was KuCoin hacked？
Yes. In September 2020, attackers compromised KuCoin hot-wallet private keys and stole more than $275 million in cryptocurrency. Much of the stolen value was later recovered or frozen.
Does KuCoin have proof of reserves？
Yes. KuCoin publishes regular Merkle-tree proof-of-reserves reports. Its July 31, 2026 snapshot reported reserve ratios of 112% for BTC, 121% for ETH, 116% for USDT and 122% for USDC.
