How the commission is calculated in BNB?

API Spot/Margin API
1

How the commission is calculated in BNB? For example, I buy BTC for USDT. I realized that the commission is paid from the BNB wallet. When paying the BNB commission, is the BTC/BNB commission charged when paying the commission?

2

Hi @bearbearovich,

When you enable BNB fee deduction on Binance, your trading fees are automatically paid in BNB instead of the quote or base asset. The fee calculation follows these steps:

  1. Determine the standard fee – This depends on your VIP level and whether you have BNB fee discount enabled. By default, spot trading fees are 0.1% but reduce to 0.075% when paying with BNB. You can have a look on the Fee Rate on your Account’s Dashboard.
  2. Calculate the BNB equivalent – The trading fee is converted into BNB using the current BTC/BNB (or USDT/BNB) rate at the time of the transaction.
  3. Fee deduction in BNB – The equivalent BNB amount is deducted from your BNB balance, not the trading pair.

For example:

  • You buy 1 BTC at $50,000 USDT.
  • Normal fee = 0.1% of 1 BTC = 0.001 BTC.
  • With BNB, it’s 0.075% of 1 BTC = 0.00075 BTC equivalent in BNB.
  • If BTC/BNB is 100, then 0.00075 BTC = 0.075 BNB.
  • 0.075 BNB is deducted from your BNB balance.

So, the BTC/BNB rate is only used for conversion but doesn’t get charged separately. The fee is deducted in BNB only at the equivalent rate.

Let me know if you need further clarification!