Why a wallet may still ask for about 1 TRX after you buy Energy

A USDT transfer uses two resources

Energy pays for smart-contract execution. Bandwidth pays for the bytes written on-chain. Renting Energy does not automatically rent Bandwidth, so both balances matter.

With enough Energy, the large contract-execution burn should be avoided, but a small Bandwidth burn can remain.

Where the approximate 1 TRX comes from

An activated account receives a free Bandwidth allowance over a rolling 24-hour window. Previous transfers or other operations may have consumed it. If free and staked Bandwidth are insufficient, TRX is burned for the missing bytes.

A wallet commonly reserves or displays about 1 TRX, approximately $0.10. The fiat equivalent is not fixed: it changes with transaction size, the current Bandwidth chain parameter and the TRX market price. It is not a second Energy purchase or an EZ Energy fee.

How to verify the charge

Open the transaction hash on Tronscan and inspect Energy Usage, Bandwidth Usage and Fee. A small Fee with Energy covered usually points to a Bandwidth shortfall. A larger charge requires checking Energy, fee limit and the execution receipt.

• Check the sender account resources.
• Use the confirmed receipt, not only a wallet estimate.
• Do not retry until the previous status is clear.

How to avoid the small extra fee

Wait for free Bandwidth to recover, keep a small TRX reserve, or obtain Bandwidth through staking or delegation. Higher-volume operations should budget Bandwidth separately.

Buying extra Energy does not replace Bandwidth. Check both resources immediately before sending.