What the spread really costs you on an instant swap
No fee line does not mean free. How to read the gap between the market price and what you actually receive.
Instant swap sites almost never show a fee line. The cost is built into the rate. It is not a trick, it is how the business works, but comparing gets harder if you do not know what to look for.
Three things are built into the rate
- The margin. What is earned for doing the swap.
- The network fee to send you the new coin, which varies by chain.
- Market movement while the swap runs, if you use a floating rate.
The number that matters
Forget headline rates. The only number that counts is the amount that reaches your wallet. Compare it with what the same amount would be worth at the open market price. The gap between the two, as a percentage, is your total cost.
That is exactly how Swapea shows you a swap. You see the amount you receive after all fees and, next to it, how far it is from the market, for example minus 0.9%. No surprises at the end.
What a reasonable spread looks like
It depends on the pair and the amount. Large, liquid pairs like BTC to USDT are usually cheaper than small coins. Very small swaps cost more in percentage terms, because the network fee to send you the coins is almost the same whatever the amount.
Check it yourself
Enter an amount on the swap page and watch how the spread changes as you raise and lower it. You will often find a sweet spot above which network fees stop dominating. Then compare several pairs on the pairs page.
Questions
Is the market price Swapea shows a price I can get?
No. It is a reference taken from public market data so you can measure the rate. Instant swaps include their margin and network fees within the rate.
Why does the amount change with the size of the swap?
Network fees are roughly fixed per transfer, so they weigh more on small swaps. Large ones usually come out better in percentage terms.
