The aggregator quote you see is 1000 USDT. After a cross-chain transfer and two swaps, you may receive only 950 or even less. This loss is not because you were cheated. Every layer charges money according to its own rules.
A leading global cryptocurrency platform,suitable for both beginners and experienced traders.
New user benefit: 20% off trading fees upon registration!！
A cross-chain route with two swaps means your funds go through at least three layers of loss: the swap fee on the source chain, the cross-chain bridge fee, and the swap fee on the target chain. Each layer may charge separately, and some fees are hidden inside the exchange rate and are not listed on their own.
Breaking down the loss: three layers of fees, and each one can be invisible
Layer 1: Swap loss on the source chain
The first swap is not free. You first convert token A into a bridge token, and this step costs you two things: one is the DEX trading fee, and the other is the spread, meaning the difference between the price you see and the actual execution price. Some wallet instant swap features hide the spread inside the exchange rate. It may look free on the surface, but the price you actually get is worse than if you swapped manually on a DEX.
Layer 2: The cross-chain bridge toll
The cross-chain bridge itself charges a service fee. Some bridges disclose this fee openly, such as 0.1% to 0.3%. Others bundle it directly into the exchange rate and do not list it separately. In tests of some built-in cross-chain features, the total loss may be around 0.5%. Add network fees, and the combined cost can approach 1%.
Layer 3: The second swap loss on the target chain
Once the bridge token arrives on the target chain, it needs to be swapped into the final token you want. This step is the same as the first one. You pay another trading fee and another spread. When two swaps stack up, the total loss is not simply 1+1=2. It is a compounding accumulation, because the second loss is deducted from the amount that has already been reduced by the first loss.
A leading global cryptocurrency platform,suitable for both beginners and experienced traders.
New user benefit: 20% off trading fees upon registration!！
How to judge whether the route is worth taking
Comparison method: First calculate the total loss rate. Do not only look at the final number shown by the aggregator.
Here is how: use (quoted amount - expected received amount) ÷ quoted amount to calculate the total loss rate. If this number is above 1.5% to 2%, and your transaction size is not large, the cost-effectiveness of this route may already be very low.
Alternative plan: If this route has too much loss, consider a substitute approach of single swap plus direct bridge transfer. For example, first use a DEX on the source chain to swap into a stablecoin supported by the target chain, then use a cross-chain bridge to transfer it in one go, instead of doing one swap on each end of the bridge.
How to verify before completing the operation: Before choosing a route, expand the fee details in the aggregator and confirm that you can see the estimated slippage for each swap and the fee estimate for the cross-chain bridge. If a fee item is marked as estimated rather than fixed, calculate the total cost using the highest value instead of trusting the lowest estimate.
