How the comparison works
Energy burn = max(required energy − available energy, 0) × energy price ÷ 1,000,000. Rental covers the shortfall with a package: 65,000 energy for 2.5 TRX or 131,000 for 5 TRX. Above Advanced, amounts round up in 65,000-energy increments, up to 250 TRX per payment. Burning a small shortfall can cost less than buying a whole package.
Bandwidth tries staked / delegated quota, then free quota, then TRX. Each quota must cover the entire transaction; they cannot be combined. The rental scenario pays bandwidth for the TRX payment first, then for USDT. That extra payment can leave too little free bandwidth for the USDT transaction.
Estimates are not transaction guarantees
The 65,000 / 130,000 presets are examples, not address checks. A recipient with zero USDT balance commonly requires more energy; that is different from whether the TRON account is activated. Replace the preset with your wallet or simulation estimate. Dynamic contract energy, account state and transaction structure can change the requirement.
Enter resources available before rental payment. Byte sizes are examples; special costs for extra signatures, activation and failed transactions are excluded. The model assumes consecutive transactions and no resource recovery between them. The payment account is activated; your wallet should be activated and eligible for delegation. Rate refresh updates rates only, not wallet balances or execution estimates.
Before renting
Pay from the wallet that will send USDT, not an exchange withdrawal. 2.5 TRX buys 65,000 energy; 5 TRX buys 131,000. Other payments must be exact multiples of 2.5 TRX. Typical delivery is 3–6 seconds, with one-hour validity after arrival. Check actual available energy and the wallet estimate before signing the USDT transaction. Rental supplies energy only; 131,000 energy does not guarantee coverage of every zero-balance recipient transfer.