Your balance is USDC; the market you want uses USDT

The conversion belongs in the cost of reaching your target asset. Compare what the complete route delivers from the same starting balance, including any amount left behind.

Suppose your balance is in USDC and you are considering an ASSET/USDT market. Write the route as USDC → USDT → ASSET before looking at the final buy screen. The trading-pair glossary explains why routing through an intermediate asset can introduce another fee-bearing trade. A convert screen may embed a spread in its quote; a fee label alone cannot establish the delivered value.

For the conversion, save the amount surrendered, the amount actually received and the quote expiry. For the purchase, save the base amount received and the asset used to pay the fee. If a direct ASSET/USDC market is available to your account, compare its expected output using that same starting balance.

An estimated route using prices from different moments can make a conversion look cheaper than it was. Keep timestamps together and replace estimates with fills afterwards. When an estimated output already includes a fee, adding that fee again overstates cost. Unspent quote balance also belongs in the reconciliation.

The Binance hub provides venue context.