Why a Maximum Network Fee Can Exceed the Final Charge
A wallet can show a maximum fee larger than the eventual execution charge. That difference can be expected when a cap limits what you authorize while the included transaction uses a lower effective price or less gas.
Identify the fields in the request
EIP-1559 transactions include a maximum fee per gas and a maximum priority fee per gas. The included block’s base fee and applicable priority fee determine the effective price within the cap. A gas limit bounds execution quantity separately. A wallet’s estimated maximum therefore answers a different question from a receipt’s actual gas use. Confirm the transaction type and network before applying an Ethereum-style formula to a displayed total.
Use an example with explicit assumptions
Assume an execution gas limit of 100,000 and a cap of 10 gwei per gas. That gives 0.001 ETH of execution-fee headroom. If the example later uses 60,000 gas at an effective 4 gwei per gas, its execution component is 0.00024 ETH. These hypothetical values exclude any separate network-specific fee components and transferred value. The difference is not evidence that a service owes a token payment or needs a recovery transaction.
Compare a receipt to its own request
Keep the transaction hash and chain fixed when comparing the pre-signing screen with confirmed data. Distinguish gas used from the gas limit and effective gas price from the fee cap. Include any additional chain-specific cost in a separate line. A screenshot from a different request or a newly refreshed quote is not a reliable comparison. If the wallet shows a dollar value, retain the ETH amount too because its conversion price can differ between observations.
Do not treat a higher cap as a repair for every error
A cap concerns fee authorization; it does not fix a wrong spender, invalid contract call or missing token allowance. Stop when the action itself is unclear rather than increasing numbers to silence a warning. RunixCoin has no available public swap execution, and this example does not recommend signing or changing fee parameters. Its purpose is to interpret existing evidence and avoid confusing a maximum display with a confirmed cost.
References and verification
Reviewed . Product limits reflect inspected public interface code. These are educational checklists, not reports of tested mainnet transactions; browser behavior and execution were not verified.