Phantom Wallet Error Code Transaction Simulation Failed: How to Fix It

Easy 5-15 minutes Medium Severity Verified June 2026
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Error Code
Transaction Simulation Failed
Brand
Phantom
Product Type
crypto_wallet
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
5-15 minutes
The 'Transaction Simulation Failed' error in Phantom wallet occurs when the Solana network predicts your transaction would fail before it's submitted. This typically happens due to insufficient SOL for transaction fees, network congestion, or issues with the smart contract you're trying to interact with.
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Tools You'll Need

How to Fix Error Code Transaction Simulation Failed

  1. Check Your SOL Balance

  2. Verify Network Status

  3. Refresh the DApp Connection

  4. Adjust Slippage Tolerance

  5. Clear Browser Cache and Cookies

    This will log you out of websites, so ensure you have login credentials saved

  6. Reset Phantom Wallet

    Ensure you have your 12-word seed phrase written down safely before proceeding

  7. Try a Different RPC Endpoint

  8. Reduce Transaction Amount

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When to Call a Professional

Contact the DApp's support team if the error persists after trying all steps, or if you suspect the smart contract has bugs. For wallet-specific issues, reach out to Phantom support through their official Discord or Twitter channels.

Frequently Asked Questions

Why does my transaction simulation fail even with enough SOL?
Transaction simulation can fail due to smart contract errors, network congestion, outdated price data, or insufficient liquidity in DeFi protocols. Try adjusting slippage tolerance or waiting for better network conditions.
How much SOL do I need for transactions?
Basic Solana transactions cost around 0.000005 SOL, but complex smart contract interactions can cost 0.001-0.01 SOL. Keep at least 0.05 SOL in your wallet for multiple transactions.
Can I bypass transaction simulation?
No, transaction simulation is a protective feature that prevents failed transactions from consuming fees. Instead of bypassing it, address the underlying issues causing the simulation to fail.
What causes high slippage in token swaps?
High slippage occurs during volatile market conditions, low liquidity pools, or large trade sizes. Increase slippage tolerance to 2-5% for most trades, or reduce your transaction amount.
Why do DeFi transactions fail more often?
DeFi transactions interact with complex smart contracts and depend on real-time price feeds, liquidity, and market conditions. They're more sensitive to network congestion and timing than simple token transfers.

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