Energy is part of the cost
When a wallet calls the USDT TRC20 contract, the network consumes Energy. If the wallet has insufficient Energy, TRX may be burned for the resource cost. The exact requirement is determined by the transaction’s execution conditions, not simply the amount of USDT being sent.
Why two transfers may cost different amounts
A recipient wallet’s token state can affect contract execution.
Existing Energy and Bandwidth reduce what must be covered with TRX.
Network resource pricing and contract behavior can change over time.
Practical checklist
Before a transfer, check the wallet’s live estimate, make sure the selected rental window has not expired, and retain enough TRX for any potential Bandwidth or Energy shortfall. Never treat a package as a guaranteed number of transfers.
Rent Energy on TronZero →How to check the likely cost before sending
Open the transfer in the wallet that will sign it and read that wallet’s current resource estimate. Check the available Energy, available Bandwidth, and TRX balance in the same wallet. The estimate shown immediately before signing is more useful than a price quoted on a website because the final result depends on the transaction that the wallet prepares at that moment.
What a fixed Energy package does — and does not — mean
A one-hour package supplies delegated Energy for the stated window. It does not guarantee a fixed number of USDT transfers, remove every network cost, or replace the wallet’s own transaction review. Leave enough TRX for a possible shortfall and verify the recipient address, token, and amount before signing. If the wallet changes its estimate, treat the updated estimate as the decision point.
Rent Energy or burn TRX: what changes?
For an illustrative 65,000-Energy shortfall, burning at 100 sun per Energy costs 6.5 TRX. The matching one-hour TronZero package costs 2 TRX: 4.5 TRX less, approximately 69.2% of that Energy-only cost.
| Energy shortfall | Burning TRX | Rental package | Difference |
|---|---|---|---|
| 65,000 Energy | 6.5 TRX | 2 TRX / 1h | 4.5 TRX · 69.2% |
| 131,000 Energy | 13.1 TRX | 4 TRX / 1h | 9.1 TRX · 69.5% |
Example assumptions: no available Energy; 100 sun/Energy; the package covers the estimate and is used within its window. Bandwidth, the rental-payment transaction and other possible costs are excluded. Energy consumption and chain parameters may change; this is not a fixed total fee for every USDT transfer.
Formula: Energy shortfall × sun per Energy ÷ 1,000,000. Reference checked 6 November 2026.
Technical sources and verification
These references explain the protocol. TronZero package prices are service terms, not TRON network fees. Recheck the wallet estimate before signing.