We read our own quotes at seven sizes, in both directions. The swap cost 0.38% plus a flat fee. On a small move out of Tron, the bigger cost was what Tron charges to send.
People move USDT between Tron and BNB Smart Chain every day, and the question is always what it costs. So we read our own live quotes at seven sizes, in both directions, on 1 November 2026, and again on 5 November: every figure came out the same. Our part turned out to be simple to state. The bigger number on a small move was a cost that is not part of any swap quote: what Tron charges you to send.
It is a swap, not a transfer
USDT on Tron and USDT on BNB Smart Chain are two separate tokens on two separate blockchains. Nothing crosses from one to the other. You send USDT to a deposit address on Tron, and the USDT you receive is paid from a wallet on BNB Smart Chain. So the move has two costs: what the swap takes, and what the chain you leave charges you to send.
What the swap cost
These are the amounts our quotes paid for USDT on Tron to USDT on BNB Smart Chain, read at 07:38 UTC on 1 November 2026 and again at 14:31 UTC on 5 November, with the same result.
- 10 USDT sent, 9.862 received: a cost of 0.138 USDT, or 1.38%.
- 25 USDT sent, 24.805 received: 0.195 USDT, or 0.78%.
- 50 USDT sent, 49.71 received: 0.29 USDT, or 0.58%.
- 100 USDT sent, 99.52 received: 0.48 USDT, or 0.48%.
- 250 USDT sent, 248.95 received: 1.05 USDT, or 0.42%.
- 500 USDT sent, 498 received: 2 USDT, or 0.40%.
- 1,000 USDT sent, 996.1 received: 3.90 USDT, or 0.39%.
Every line is the same sum: 0.38% of the amount, plus a flat network fee of 0.10 USDT. The other way, from BNB Smart Chain to Tron, the flat fee was 0.15 USDT, so 100 USDT paid 99.47. A percentage treats every size alike and a flat fee does not, which is why the cost in percent climbs as the amount shrinks.
The cost that is not in the quote
Sending USDT on Tron is paid for in energy, or in TRX if you have no energy. A USDT transfer burns about 6 to 7 TRX to an address that already holds USDT, and roughly twice that to one that holds none. A Cambio deposit address is made for one order, so it holds nothing when your USDT arrives. That is the expensive case: about 130,000 energy on our own measured transfers, or about 13 TRX. At that morning's energy price, with TRX at about 31 cents, that is about $4.
BNB Smart Chain is a different story. We asked the network what the same kind of transfer would use: about 52,000 gas. At that morning's gas price that came to less than a cent.
Here are the two directions side by side for 100 USDT, sent from a wallet with no energy.
- Tron to BNB Smart Chain: 0.48 USDT for the swap and about $4 to Tron, so about $4.50 in all.
- BNB Smart Chain to Tron: 0.53 USDT for the swap and less than a cent to BNB Smart Chain, so about $0.53 in all.
On 100 USDT, the send from Tron cost about eight times what the swap did. On 10 USDT, the two together came to about 40% of the amount. On 1,000 USDT they were about equal.
What changes these numbers
- Energy. If your wallet has energy from staked TRX, or rents it for you, the send costs far less than burning TRX.
- Where you send from. A withdrawal from an exchange account costs that exchange's withdrawal fee instead of Tron's fee.
- The networks. Tron's energy price, gas on BNB Smart Chain and the prices of TRX and BNB all move. Your wallet shows the real figure before you confirm.
- Our quote. These figures are from one morning. The quote for your own amount is worked out when you ask for it.
The rate is the part people compare, and on a small move out of Tron it is the smaller cost. If you are moving a small amount, look at the fee your wallet shows before you look at anything else.
