If the recipient can accept USDT on both TRC20 and ERC20 and you want this transfer to cost less, compare the two networks by their official fee rules first; if you choose TRC20, consider renting Energy for the sending address with GasStation before you send, because TRON lets delegated Energy pay for contract execution and an address with enough Energy burns less TRX. An ERC20 transfer on Ethereum is charged as gas used times a price per unit, paid in ETH, and it costs more when the network is busy. When both sides share only one network, prepare the fee under that network's rules. If the recipient supports only one of the two networks, or you are not sending from your own TRON wallet, use the network the recipient supports and do not rent Energy from GasStation. Choosing a network so the funds arrive safely is covered in a separate article.
On TRON, Energy rented from GasStation can cover the largest part of a USDT transfer fee. The TRON developer documentation states that Bandwidth is measured by transaction size and Energy by contract computation; a USDT (TRC20) transfer is a contract call, so it consumes Energy, and Energy has no free quota.
The same page explains why most delegation involves Energy: every account has a free Bandwidth quota that recovers daily and covers many everyday transfers, while Energy comes only from staking or from another account's delegation.
TRON's guide to paying for resources contrasts this with Ethereum, where the caller always pays the full gas, whereas TRON lets resources obtained by staking or delegation pay instead. The TRC20 fee can therefore be lowered, and the way to do it is to give the sending address Energy before the transfer.
GasStation delegates resources on TRON, while an ERC20 transfer fee on Ethereum is paid in ETH. The ethereum.org guide to gas gives the formula: fee = units of gas used × (base fee + priority fee), with prices usually quoted in gwei.
Each part has its own source:
The base fee is set by the protocol. It follows how full the previous block was, moves by at most 12.5% per block, and is burned.
The priority fee is a tip to validators. When demand is high it has to be larger for the transaction to make the next block.
Gas units depend on the operation. Smart contract calls need more gas than a plain ETH transfer, and an ERC20 transfer is a contract call.
The page also notes that the fee is paid whether the transaction succeeds or fails, that most wallets set a recommended fee automatically, and that unused gas is refunded. To find a cheaper moment, the gas trackers the page lists show network fees as they move.
GasStation serves transfers on TRON mainnet, while the usual fee-cutting route on the Ethereum side is a layer 2 network. ethereum.org names layer 2 scaling as the primary initiative for improving gas costs.
If the funds first have to move from mainnet to a layer 2 network, a bridge sits in between. The ethereum.org page on bridges says bridges typically charge a fixed or variable fee depending on gas costs and the liquidity of the route, so the bridge fee belongs in the same comparison.
Disclaimer: the same page lists smart contract risk, systemic financial risk and counterparty risk for any bridge; assess them yourself before bridging.
GasStation serves transfers where both the sender and the recipient use TRON, so start with the networks the two sides have in common, then compare them with the fee rules in the three sections above. Which networks the recipient accepts and how to choose one safely is covered in a separate article; this one compares fees only.
From there the order is:
1. Both sides support TRON. Use TRC20 and rent Energy for the sending address with GasStation first; a one-off transfer fits a short term, and the steps are in the guide to lowering a single USDT transfer fee. 2. Both sides are on Ethereum mainnet only. Use ERC20 and follow the wallet's recommended fee; busy periods raise the priority fee and the total. 3. One side is on a layer 2 network. Add the bridge fee and your own risk assessment to the total, then compare it with a direct TRC20 transfer.
Checked on 20 October 2026 against each network's official documentation; actual fees are those shown by the wallet or order page at the time of the transfer.
When both sides support TRON, consider sending on TRC20 and renting Energy for the sending address with GasStation first: TRON lets delegated Energy pay for contract execution, so enough Energy means less TRX burned. When both sides are on Ethereum only, ERC20 gas is paid in ETH, so follow the wallet's recommended fee and avoid busy periods; when a layer 2 network is involved, add the bridge fee before comparing.
ethereum.org explains that a gas limit below what the transaction needs gets it rejected during validation, before it enters a block and with no gas consumed, while running out of gas mid-execution reverts the changes but still consumes all the gas provided. Keep the gas limit at the wallet's suggested value instead of lowering it by hand.
On Ethereum the sender pays gas in ETH, and the ethereum.org formula has only three inputs: gas units, base fee and priority fee. To lower an ERC20 fee, start from the wallet's recommended value and send when the network is quieter, or evaluate a layer 2 network.
TRON documentation says on-chain transactions generally consume Bandwidth, measured by transaction size, and every account has a free Bandwidth quota that recovers daily. Energy is the larger part of a TRC20 transfer fee, and GasStation also rents Bandwidth on the same order page when you need it.
Disclaimer: GasStation's site states that it provides blockchain resource technology services only and does not constitute any form of investment, financial product or return guarantee; users should assess the risks of using the TRON network and related services and comply with the laws of their jurisdiction.