Custo Transfer ERC-20

How ERC-20 transfer cost works

An ERC-20 token transfer on Ethereum mainnet burns around ~65,000 gas, against ~21,000 gas for a plain ETH transfer, because the call has to update the token contract's balance mapping. The cost in ETH works out to gas × gas price (in gwei) ÷ 10⁹; for dollars, multiply that by the ETH/USD price. So at 30 gwei with ETH at US$ 3,500, sending USDT or USDC runs 65,000 × 30 × 10⁻⁹ = 0.00195 ETH, roughly US$ 6.83. The ERC-20s people move most are stablecoins like USDT, USDC and DAI, though a few, PAXG among them, carry extra logic that pushes gas past 100k. A single ERC-20 transfer costs more than batching through meta-transactions or ERC-1271 contracts, and Layer 2 rollups such as Arbitrum, Optimism, Base and zkSync cut the bill by 10 to 100× because they spread L1 calldata over many transactions.

Applications

Budgeting a DeFi strategy means pricing deposits and withdrawals on Aave, Compound or Curve. There is stablecoin remittance too, like sending USDT out of Brazil for an international payment, where you weigh mainnet against L2. The same math feeds Uniswap or 1inch swap quotes, the mainnet-vs-L2 call (Base usually wins under US$ 0.10), and merchant gateways gauging how much the fee eats into checkout.

FAQ

Why does ERC-20 cost more than ETH transfer? It runs the contract's transfer() function, which reads and writes storage slots. Each write runs you 20,000 gas, while a plain transfer just flips two account balances.

Does the token type change the cost? It does. Figure USDC around 65k gas and USDT around 55k, while tokens with fee-on-transfer or rebasing logic can climb past 150k. Brand-new contracts, where the storage slots are still cold, cost more on the first interaction.

Is L2 always cheaper? For transfers, almost always; Base and Arbitrum land 50-100× below mainnet. The catch is that getting onto L2 means bridging your tokens in first, and that bridge is itself a mainnet transaction.