MetaMask stuck pending transaction fix and nonce reset
A transaction that hangs in "pending" is one of the most common frustrations in MetaMask. It is not a bug. It is how Ethereum-based chains enforce order. Understanding the nonce system is the first step toward fixing it.
Every transaction you send carries a nonce: a sequential number assigned to your wallet address. Nonces start at zero and increase by exactly one each time. The network processes transactions in nonce order, lowest first. If you send a transaction with nonce 5, it will not confirm until nonces 0 through 4 have been processed or replaced.
This is why a single stuck transaction can freeze your entire wallet. Later transactions, even those with higher gas, will queue behind it. They cannot skip ahead.
What the error messages actually mean
MetaMask shows two common errors when a transaction fails or refuses to confirm.
"Nonce too low" means the transaction you are trying to send uses a nonce that the network has already seen. Possibly another transaction with that nonce already confirmed. Possibly it was dropped and your wallet reused the number. The network rejects it because it expects a higher nonce.
"Replacement transaction underpriced" appears when you try to replace a stuck transaction with a new one, but your gas price is too low. The network requires a minimum 10% gas increase to allow a replacement. MetaMask's "Speed Up" button handles this automatically. If you try a manual replacement without meeting that threshold, you get this error.
Speed up and cancel: how they work under the hood
MetaMask offers two buttons for stuck transactions: Speed Up and Cancel.
Speed Up sends a new transaction with the same nonce but higher gas. The network sees two transactions with the same nonce. It accepts the one with higher gas. The original never confirms. This works if the original transaction is still pending and your wallet controls the nonce.
Cancel does something similar. It sends a transaction from your address to yourself with value zero, using the same nonce as the stuck transaction. The network processes this "cancel" transaction instead. Your original transaction never confirms. No funds move.
Both methods rely on the same principle: you can replace any pending transaction with another using the same nonce, provided the replacement has a higher gas price.
When none of that works: the custom nonce reset
Speed Up and Cancel can fail. Your wallet may show the transaction as pending, but the network has already dropped it. The mempool has cleared it. MetaMask still holds the nonce hostage.
This is where a custom nonce reset becomes necessary. You must manually set a nonce in MetaMask's advanced gas settings.
Go to Settings > Advanced > Advanced Gas Controls and enable it. Then send a new transaction. Before confirming, click the edit button next to gas. You will see a field for nonce. Enter the nonce value of the stuck transaction. Set a gas price that is competitive with current network conditions. Send it.
This forces the network to accept your new transaction at that nonce. If the old transaction was already forgotten, yours will go through. If it was still pending, yours competes. The higher gas wins.
The nuclear option: resetting MetaMask activity
MetaMask has a "Reset Account" button under Settings > Advanced. It clears your transaction history locally. It does not touch your funds or your seed phrase.
Reset is appropriate when you have confirmed that your stuck transactions are no longer in the mempool. You can check this on a block explorer like BscScan. If the nonce shows no pending transaction, the network has moved on. Your wallet just has not caught up.
After reset, MetaMask resets its nonce counter to zero. This is dangerous if you have pending transactions that might still confirm. If you reset and then send a new transaction, your wallet might reuse a nonce already submitted to the network. That new transaction would fail with "nonce too low." Worse, if the old transaction later confirms, your account could execute an unintended action.
Reset only when you are certain no pending transactions remain on chain. When in doubt, use a custom nonce instead. It is safer and more precise.
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None of this changes how MetaMask handles nonces. The same rules apply on BSC as on Ethereum. The same stuck transaction fixes work here.
The only difference is gas. BSC gas costs are usually lower than Ethereum mainnet. A stuck transaction on BSC is cheaper to replace. The same mechanics apply. Speed Up, Cancel, and custom nonce reset all function identically.
If you hold UNI on this chain and a transaction stalls, you have the same options. Start with Speed Up. If that fails, try Cancel. If neither works, check the mempool. If clear, set a custom nonce. Reset only as a last resort.
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