A cross-chain swap usually costs a small percentage of the trade plus network gas on the chain you swap from. The exact total depends on the tokens, the chains and the route that moves your funds.
That is why two quotes for the same swap can deliver different amounts. This guide breaks down each cost, shows what KyberSwap charges, and explains what to compare before you confirm.
What Makes Up the Cost of a Cross-Chain Swap?
The cost of a cross-chain swap has four parts: source-chain gas, route provider costs, a platform fee and price impact.
A simple way to think about it: you pay the network to send the transaction, you pay a provider to deliver value on the other chain, and the market sets the final rate.
- Source-chain gas: the network fee for the transaction you sign in your wallet.
- Route provider costs: what the bridge, relayer or solver charges to move value between chains and complete the destination side.
- Platform fee: what the interface charges for finding and executing the route.
- Price impact and slippage: the gap between the quoted rate and the rate you actually get.
Not every part shows up as its own line. Many providers build their costs into the quoted output, so the amount you receive tells you more than any single fee label.
Fees: What Does KyberSwap Charge for a Cross-chain Swap?
KyberSwap applies a Platform Fee of 0.05% to 0.25% for using Cross-chain Swap. The rate depends on the route and the volatility level of the tokens.
| Route | Stable tokens & Same native token | Common | Exotic | High-volatility |
|---|---|---|---|---|
| EVM ↔ EVM | 0.05% | 0.10% | 0.15% | 0.25% |
| Near ↔ EVM | 0.1% | 0.2% | 0.2% | 0.2% |
| Solana ↔ EVM | 0.1% | 0.2% | 0.2% | 0.2% |
| BTC ↔ EVM | 0.25% | 0.25% | 0.25% | 0.25% |
| Non-EVM ↔ Non-EVM | 0.25% | 0.25% | 0.25% | 0.25% |
The lowest rate, 0.05%, applies to Stable tokens & Same native token on EVM ↔ EVM routes. The rate rises with the volatility level of the tokens. BTC ↔ EVM and Non-EVM ↔ Non-EVM routes use a flat 0.25%.
For example, a $1,000 swap between stable tokens on an EVM ↔ EVM route falls in the 0.05% tier. The Platform Fee on that swap is about $0.50.
The applicable Platform Fee is shown in the swap details section after the route is generated and before you confirm the transaction.
Protocol Fee: The Route Provider’s Charge
Some third-party providers may charge a protocol-specific fee, shown as Protocol Fee, for using their route. The Protocol Fee is separate from the Platform Fee.
If applicable, the Protocol Fee is displayed in the Swap Details when this route is selected, or within the Choose Your Route section during route comparison.
Gas: Which Chain Do You Pay Gas On?
You pay gas on the source chain, where you approve the cross-chain swap transaction in your wallet. The amount depends on that chain’s network conditions when you swap.
This makes your source chain a real cost decision. The same transaction usually costs far more gas on Ethereum mainnet than on a Layer 2 such as Arbitrum or Base. For small swaps, source-chain gas can be the largest cost in the whole trade.
Token Approval Can Add a Transaction
You might need to approve the input token first if you haven’t previously authorized the protocol to swap this token on your behalf. Token approval is a separate action and may require gas.
What Happens on the Destination Chain?
A cross-chain swap includes the swap on the source chain, bridging, and settlement on the destination chain. When the swap succeeds, the output tokens are delivered to your receiving address on the destination chain.
To move or use those tokens on the destination chain afterward, you will need that chain’s gas token.
Price Impact and Slippage: The Cost That Isn’t Listed as a Fee
Price impact and slippage can cost more than all fees combined on a large swap or a thinly traded token.
Price impact comes from liquidity. A large order moves the price in the pools that fill it, so you get a worse average rate. Slippage comes from time. Prices can move between the moment you see a quote and the moment the swap completes, and cross-chain swaps take longer than same-chain swaps.
Before you click Confirm Swap on KyberSwap, carefully review the confirmation box. It shows the token amount, destination address, minimum received, estimated processing time and platform fee.
What to Compare Before You Confirm a Cross-Chain Swap
Compare the amount you will receive on the destination chain, not the headline fee. A route with a lower fee can still deliver fewer tokens if its pricing is worse.
KyberSwap does this comparison for you by default. After you enter an amount, KyberSwap automatically fetches real-time quotes from multiple third-party cross-chain protocols and selects the option that provides the best rate among the quotes. Supported protocols include NEAR Intents, Across, Relay Protocol, deBridge, LI.FI, Mayan Finance, Bungee and Symbiosis.
To see every option, click More Options to open the Choose Your Route section. There you can compare available providers, view estimated return amounts, fees and estimated arrival times, and choose another quote you prefer.
Four Things to Check in Every Quote
- Estimated return amount: the output amount after the route’s fees and pricing. This is the number to rank routes by.
- Minimum received: shown in the confirmation box before you confirm. Check it alongside the estimated return amount, especially for volatile tokens.
- Platform Fee and Protocol Fee: both appear before you confirm, so you can see exactly what the route charges.
- Estimated processing time: some chains or protocols may take more time to complete. For a time-sensitive trade, a slightly lower quote that arrives much faster can be the better choice.
Compare Against Bridging and Swapping Separately
A cross-chain swap replaces two jobs: moving funds to another chain and swapping into the token you want. Doing them separately means paying for each step yourself.
The manual path usually includes source-chain gas for the bridge, a bridge fee, destination-chain gas for the swap and a DEX trading cost. It also requires holding the destination chain’s gas token before you can swap at all.
With Cross-chain Swap, you can swap from any token on one chain to a different token on another chain, directly through KyberSwap, with no external steps required.
FAQ
Are cross-chain swaps more expensive than same-chain swaps?
Yes. Cross-chain swaps usually cost more than same-chain swaps. Moving value between chains adds provider costs, and the longer processing time leaves more room for price movement.
Why does Cross-chain Swap have a fee when Swap on KyberSwap does not?
No platform fee is applied to Swap when you access KyberSwap.com directly. For Cross-chain Swap, KyberSwap applies a platform fee to support the continued development and maintenance of the feature.
What happens if a cross-chain swap fails?
A failed cross-chain swap on KyberSwap is automatically reverted. The input tokens are returned to your sender wallet address.
You can follow every swap’s status in the transaction history panel, from Processing to Success or Failed.
Which Cross-Chain Swaps Cost the Least?
The cheapest cross-chain swaps use Stable tokens & Same native token on an EVM ↔ EVM route, starting from a low-gas source chain. The Platform Fee is 0.05% and gas stays small, so your main decision is usually speed.
Swaps involving high-volatility tokens, BTC or other non-EVM routes fall into higher Platform Fee tiers. On these routes, price impact can matter more than fees, so compare estimated return and Minimum received across routes before you confirm.
Ready to see the numbers for your own swap? Open the Cross-chain tab on KyberSwap or visit kyberswap.com/cross-chain and compare live quotes before you sign.
