This Transaction Will Likely Fail: How to Fix It (2026)
— By Tony Rabbit in Tutorials
Learn why your crypto wallet warns 'this transaction will likely fail' and how to fix common causes like low gas, slippage issues, or honeypot tokens.
When your crypto wallet displays the warning this transaction will likely fail, it means the wallet has simulated your intended transaction on the blockchain and predicts it will not succeed or will revert. This prediction is a crucial safeguard, alerting you before you spend gas fees on a transaction that won't complete, though it is a prediction and not a hard block, allowing you to proceed at your own risk.
What 'This Transaction Will Likely Fail' Means
This warning, commonly seen on wallets like Coinbase Wallet and Trust Wallet, is a proactive measure. Before you confirm a transaction, your wallet performs an off-chain simulation to anticipate the outcome if it were executed on the blockchain.
If the simulation indicates that the transaction would fail or revert on-chain, the wallet displays this message. It's a prediction based on current network conditions and your transaction parameters, designed to save you from wasting valuable gas fees on unsuccessful operations.
Why Wallets Show This Warning
The primary purpose of this warning is user protection. In the decentralized world, every interaction with a smart contract, successful or not, incurs a gas fee paid to network validators. A failed transaction still consumes gas because the network resources were used to process it, even if it didn't achieve its intended outcome.
By simulating and warning you, wallets aim to prevent frustrating experiences and unnecessary financial losses. While it's a prediction and not a hard block, the warning usually means the transaction really would fail.
Common Cause 1: Insufficient Native Token for Gas
One of the most frequent reasons for this warning is simply not having enough of the native blockchain token (e.g., ETH for Ethereum, BNB for BNB Smart Chain) in your wallet to cover the transaction's gas fees.
Even if you have enough of the token you're trying to swap or send, you always need a small amount of the chain's native currency to pay for the network's computational cost.
How to Fix: Ensure Sufficient Gas Token
- Check Balance. Open your wallet and verify your balance of the native token for the blockchain you are using (e.g., ETH, BNB, MATIC).
- Estimate Gas. The wallet usually displays an estimated gas fee. Ensure your native token balance is greater than this estimate.
- Deposit Funds. If your balance is too low, send more of the native token to your wallet from an exchange or another wallet.
- Retry Transaction. Once the funds are confirmed in your wallet, attempt the transaction again.
Common Cause 2: Slippage Set Too Low for Volatile Swaps
When swapping tokens on a decentralized exchange (DEX), slippage tolerance is a setting that dictates the maximum percentage difference you're willing to accept between the quoted price and the executed price. In volatile markets, prices can change rapidly.
If your slippage tolerance is set too low (e.g., 0.1% or 0.5%), a slight price movement can cause the transaction to fail because the actual execution price falls outside your acceptable range.
How to Fix: Adjust Slippage Tolerance
- Locate Slippage Setting. In your DEX interface (e.g., Uniswap, PancakeSwap), look for a gear icon or settings menu, typically near the swap button.
- Increase Slippage. Incrementally raise the slippage tolerance. Start with 1%, then try 2%, 3%, or even higher for extremely volatile tokens (though higher slippage means you might get less tokens).
- Understand Risk. Be aware that higher slippage increases the risk of price impact, meaning you might receive fewer tokens than initially expected.
- Retry Swap. After adjusting, attempt the token swap again.
Common Cause 3: Missing or Insufficient Token Approval
Before a decentralized application (dApp) or DEX can interact with your ERC-20 tokens (like selling or swapping them), you must first grant it permission. This is done through a separate 'approve' transaction, which allows the dApp to spend a specified amount of your tokens.
If you haven't approved the token for the dApp, or if the approved amount is less than what you're trying to transact, your wallet will correctly predict that the subsequent transaction (e.g., a swap) will fail.
How to Fix: Approve the Token
- Initiate Approval. On the DEX or dApp, if you're trying to swap a token for the first time or after clearing approvals, look for an 'Approve' button before the 'Swap' or 'Send' button.
- Confirm Approval Transaction. Your wallet will prompt you to confirm an approval transaction. This will incur a small gas fee.
- Wait for Confirmation. Wait for the approval transaction to be confirmed on the blockchain. This usually takes a few seconds to minutes.
- Proceed with Main Transaction. Once approved, you can then proceed with your intended swap or transaction.
Common Cause 4: Swap Deadline Expired
DEX swaps often include a 'transaction deadline' or 'swap deadline' setting. This is the maximum amount of time you're willing to wait for your transaction to be confirmed on the blockchain.
If network congestion is high or you set a very short deadline, and your transaction isn't processed within that timeframe, it will automatically revert, leading to the 'likely fail' warning if the wallet anticipates this delay.
How to Fix: Refresh and Retry
- Refresh Page. Simply refreshing the dApp's page can often reset the deadline timer and fetch updated network conditions.
- Check Network Congestion. If the issue persists, check a blockchain explorer (e.g., Etherscan, BscScan) for the current gas prices and network congestion.
- Adjust Deadline (Advanced). Some DEXes allow you to manually adjust the transaction deadline in their settings. Increasing it slightly can help, but be cautious not to set it excessively long.
- Retry Transaction. Attempt the transaction again after refreshing or adjusting settings.
Common Cause 5: Trying to Sell an Unslippable or Honeypot Token
Unfortunately, not all tokens are legitimate or designed for free trading. Some malicious tokens, known as 'honeypots,' are programmed to allow buying but prevent selling, effectively trapping your funds.
Other tokens might have extremely high or variable transaction taxes, or specific contract functions that make them difficult or impossible to sell under normal circumstances, leading to a predicted failure.
How to Fix: Verify Token Safety on DEXTools
- Copy Token Contract Address. Find the contract address of the token you're trying to sell.
- Visit DEXTools.io. Navigate to DEXTools.io, a leading platform for real-time crypto data and analytics.
- Paste Address. Use the search bar on DEXTools and paste the token's contract address.
- Check for Warnings. DEXTools provides comprehensive information, including a 'Honeypot Checker' or similar security indicators. Look for warnings about sell restrictions, high taxes, or other suspicious contract functions.
- Exercise Caution. If DEXTools indicates the token is a honeypot or has severe selling restrictions, do not attempt to force the transaction. Your funds are likely unrecoverable.
Common Cause 6: Temporary RPC or Network Issues
Sometimes, the issue isn't with your transaction parameters but with the underlying infrastructure. A temporary glitch with the Remote Procedure Call (RPC) node your wallet is connected to, or broader network instability, can cause transaction simulations to fail.
These issues are usually transient and resolve themselves quickly, but they can temporarily prevent your wallet from accurately assessing the transaction's viability.
How to Fix: Switch RPC or Wait
- Wait a Few Minutes. For temporary network issues, simply waiting a few minutes and retrying can often resolve the problem.
- Switch RPC (Advanced). In your wallet settings (e.g., MetaMask), you might have the option to switch to a different RPC provider for the current network. Public RPCs like those from Alchemy or Infura can sometimes be more stable.
- Restart Wallet/Browser. Close and reopen your wallet application or browser extension, and refresh the dApp page.
- Check Network Status. Look for official announcements from the blockchain network or your wallet provider regarding outages.
Quick Fixes Table: Cause and Solution
This table provides a quick overview of common causes for the 'this transaction will likely fail' warning and their corresponding solutions.
When to Stop Forcing the Transaction
While the warning is a prediction, it's a highly accurate one. If you've tried the common fixes and the 'this transaction will likely fail' warning persists, it's crucial to stop attempting to force the transaction.
Especially if you suspect the token might be a honeypot or if the issue seems fundamental to the token's contract, continuing to try will only deplete your native token balance unnecessarily. It's better to cut your losses and investigate further or abandon the transaction.
Preventing Future Transaction Failures
Adopting a few best practices can significantly reduce the occurrence of 'this transaction will likely fail' warnings:
- Always Keep Extra Gas: Maintain a buffer of the native token in your wallet beyond what you plan to transact, ensuring you always have enough for gas.
- Understand Slippage: Learn how slippage works and adjust it appropriately for the token's volatility and your risk tolerance.
- Verify Token Contracts: Before interacting with new or unfamiliar tokens, always verify their contract address and check for red flags on platforms like DEXTools.
- Approve First: Remember that most dApps require an initial approval transaction for ERC-20 tokens.
- Stay Informed: Keep an eye on network status updates, especially during periods of high congestion.
By understanding the common causes and implementing these preventative measures, you can navigate the decentralized finance landscape more smoothly and avoid the frustration of failed transactions. Remember, DEXTools is a valuable resource for researching token safety and market conditions.
Not financial advice.
Frequently Asked Questions
What does 'this transaction will likely fail' mean?
It means your crypto wallet has simulated your transaction and predicts it will not succeed or will revert on the blockchain, warning you to prevent wasted gas fees.
Why does my wallet say 'this transaction will likely fail'?
Common reasons include insufficient native token for gas, slippage set too low for a volatile swap, a missing token approval, an expired swap deadline, or attempting to sell a honeypot token.
How do I fix 'this transaction will likely fail' due to low gas?
Ensure you have enough of the native blockchain token (e.g., ETH, BNB) in your wallet to cover the estimated gas fees. Deposit more if your balance is too low.
What is slippage and how does it cause transaction failure?
Slippage is the maximum price deviation you're willing to accept in a swap. If set too low, a slight price change can cause the transaction to fail because the actual price falls outside your tolerance.
How do I approve a token to fix a likely failed transaction?
On the dApp or DEX, look for an 'Approve' button before the main transaction. Confirm this approval transaction in your wallet, paying a small gas fee, then proceed with your intended action.
Can a honeypot token cause 'this transaction will likely fail'?
Yes, if a token is programmed to prevent selling (a honeypot), your wallet will predict the sell transaction will fail. Always verify token safety on platforms like DEXTools before transacting.
What should I do if the warning persists after trying fixes?
If the warning 'this transaction will likely fail' persists after trying common solutions, do not force the transaction. Confirming a transaction that fails still costs gas, leading to wasted funds.
Is it safe to ignore 'this transaction will likely fail'?
It is generally not safe to ignore this warning. While it's a prediction, it is usually accurate, and ignoring it will likely result in a failed transaction and wasted gas fees. Address the underlying cause instead.
How can DEXTools help with 'this transaction will likely fail'?
DEXTools can help by allowing you to check a token's contract for honeypot risks, high taxes, or other restrictions that might cause a transaction to fail, helping you make informed decisions before interacting with a token.