USDT from BEP20 to TRC20
This is the most asked-for move in the wallet. Deposit on BEP20, withdraw on TRC20: $1 of network fee instead of $3. The energy problem waiting on the Tron side never becomes yours.
What normally makes this expensive
Two tolls, one at each end. Leaving BNB Chain wants BNB you probably do not keep, and arriving on Tron means the next transfer out of that address will want energy: either frozen TRX or a rental bought by the hour from a market most people meet for the first time at exactly the wrong moment.
What the wallet does with them
Both are settled inside the operation and quoted to you in USDT. You are not asked to hold BNB, and you are not asked to learn what energy is. The first transfer out of your Tron balance behaves like any other.
The address is not the network
A BNB Chain address and an Ethereum address look identical, both starting 0x, while a Tron address starts with T and cannot be confused with either. That asymmetry is why this direction is safer than most: you can send to the wrong EVM chain by accident, but you cannot mistake a Tron address for one.
Why the far end usually wants TRC20
Ask an exchange, a payment desk or a person in most of the world which USDT they credit and the answer is Tron. That is not a technical judgement about the chain. It is where the liquidity settled years ago and stayed. It is also why this direction is asked for far more often than its reverse, and why the price for it is worth quoting as a flat number rather than a range.
What arrives is what you were shown
The figure above is the raw route, priced when you asked. The wallet adds its service fee as a separate line on the confirmation screen, and nothing is taken after the fact: the amount that lands is the amount you approved.
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Questions
How much does USDT BEP20 to TRC20 cost?
Deposit on BEP20, withdraw on TRC20: $1 of network fee instead of $3.
Do I need BNB or TRX?
Neither. Both network fees are paid out of the operation itself, in USDT.
How long does it take?
BNB Chain settles about every 3 seconds and Tron about every 3 seconds; in practice the quote shows around ten seconds end to end.