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How TRON charges for transactions, explained without the marketing. Start wherever your problem is.
What is TRON energy
Energy is what TRON charges for running a smart contract, and it is why a USDT transfer costs anything at all. How it is produced, why it is not a token, and what happens when you run out.
How TRC20 fees and other TRON transaction fees work
Learn how TRC20 fees and other TRON transaction fees use bandwidth and energy, why TRC20 network fees vary, and when insufficient resources can burn TRX.
How much energy a USDT transfer needs
Planning estimates are roughly 65,000 and 130,000 energy, but the applicable figure depends on the USDT contract path, receiver state, and transaction details. How to estimate with margin instead of treating either number as a binding requirement.
OUT_OF_ENERGY: what it means and how to fix it
Your transaction failed with OUT_OF_ENERGY. Learn what the error means, why TRX may still be charged, and what to check before trying again.
Energy and bandwidth: what each one pays for
Energy accounts for contract computation, while bandwidth accounts for encoded transaction size. Why a USDT contract call may consume both, why energy alone does not cover bandwidth, and what to inspect before sending.