The term gas fee originates from Ethereum, where ETH is burned to pay for computation. On TRON, the equivalent concept is implemented through two separate resources: Bandwidth and Energy. Bandwidth covers the byte-size cost of broadcasting a transaction to the network. Energy covers the computational cost of executing smart contract logic. Together, they form TRON's fee model, which is generally more predictable than Ethereum's gas auction mechanism. When sufficient Bandwidth and Energy are pre-loaded in a wallet — through staking or rental — transactions can cost as little as a fraction of a cent.
The TRON network calculates fees as follows: Bandwidth fee = transaction size in bytes multiplied by 1,000 SUN; Energy fee = Energy units consumed multiplied by the current Energy unit price in SUN. As of 2026, the Energy unit price is 100 sun following Proposal #104. SUN is the smallest TRON unit (1 TRX = 1,000,000 SUN). New TRON accounts must be activated with a minimum 1 TRX deposit. Unlike Ethereum where gas prices fluctuate with network congestion, TRON Energy and Bandwidth prices change only through governance votes — making TRON fees substantially more predictable. Failed transactions on TRON do not consume Energy if the failure is due to insufficient resources, though Bandwidth may still be partially consumed.
November 13, 2023
