Tx Doctor / EVM error library / Replacement transaction underpriced
EVM error: Replacement transaction underpriced
You tried to replace a pending transaction but the new fee was not high enough to outbid it — most nodes require roughly 10% more.
Why it happens
- The replacement used the same gas price as the stuck transaction.
- Only the priority fee was raised while maxFeePerGas stayed the same.
- The wallet's 'speed up' option reused the original fee after the base fee dropped.
How to fix it
- Raise maxFeePerGas and maxPriorityFeePerGas by at least 10–15%.
- Cancel instead: send 0 to your own address with the same nonce at a higher fee.
- Wait for the pending transaction to drop out of the mempool, then resubmit.
What it looks like in the wallet or explorer
replacement transaction underpriced
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