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MetaMask Insufficient Funds for Gas: How to Fix It

By Qbitics Editorial

If MetaMask says "insufficient funds for gas", your wallet may not have enough of the required network currency to cover the transaction fee. On Ethereum Mainnet, the native gas currency is ETH. On BNB Smart Chain, it's BNB. On Base, it's ETH held on Base. On Polygon PoS, it's POL, previously known as MATIC.

However, running out of a native gas token is not the only possible cause.

You can also see an insufficient-funds warning when trying to send your entire ETH balance without leaving enough for fees, when gas estimates increase, or when the wrong account or network is selected.

There is also an important development in MetaMask: eligible transactions can use its gas-included feature, which allows certain other tokens to cover network fees without requiring a separate native-token balance.

This guide explains how to fix the MetaMask insufficient funds for gas error, determine which currency you need, calculate realistic gas requirements, and troubleshoot problems when you already appear to have enough funds.

Last reviewed: 12 October 2026. Wallet features, supported tokens and transaction fees can change. Always check the actual transaction confirmation screen before approving a transfer.

What Does "Insufficient Funds for Gas" Mean in MetaMask?

Gas is the fee associated with processing a transaction on a blockchain.

When you send ETH, transfer an ERC-20 token, interact with a decentralised application or approve a smart contract, the network requires resources to process the action.

The corresponding fee is normally paid in that network's native currency.

For example, if you hold 100 USDT on Ethereum but have no ETH, a conventional USDT transfer cannot proceed because the transfer requires ETH for gas.

You have enough USDT to cover the amount being transferred, but not enough ETH for the transaction fee.

Example

Imagine your MetaMask wallet displays:

• USDT balance: 100 USDT.
• Ethereum ETH balance: 0 ETH.
• Estimated transaction network fee: 0.0002 ETH.

A conventional transfer of 50 USDT requires ETH for its execution.

Even though your USDT balance is sufficient, MetaMask may block the transaction or display an insufficient-funds warning.

One solution is to obtain enough ETH on Ethereum.

Another, if MetaMask offers an eligible gas-included transaction, may be to select a supported token to cover the fee.

The correct fix depends on your network, wallet features and the transaction you're trying to execute.

Which Token Do You Need for Gas?

Different blockchains use different native gas currencies.

These are network-specific balances.

For example, 0.01 ETH on Ethereum Mainnet does not automatically provide 0.01 ETH for gas on Base.

Likewise, an ETH-labelled token held on BNB Smart Chain is not necessarily the same as the chain's native BNB.

What About Polygon MATIC?

Polygon PoS transitioned its native token from MATIC to POL.

Some wallets, exchange records or older tutorials may still use the MATIC name.

For current Polygon PoS gas requirements, look for POL and confirm the exact asset and network with the receiving wallet or platform.

Do not assume that any token labelled MATIC on any network is immediately usable for Polygon gas.

How to Fix MetaMask Insufficient Funds for Gas: Step by Step

The following process covers the most common cases without requiring advanced wallet configuration.

Step 1: Check the Selected Network

Open MetaMask and look at the active network.

Make sure it matches the blockchain on which you want to send or interact with the asset.

For example:

• Ethereum USDT: Ethereum Mainnet.
• BNB Smart Chain USDT: BNB Smart Chain.
• Base USDC: Base.
• Polygon USDC: Polygon PoS.

If the wrong network is selected, MetaMask may show balances that don't match your intended transaction.

Changing networks can change which balances are displayed.

It does not transfer funds between blockchains.

Step 2: Check Your Native Gas Balance

Look for the native currency balance associated with the selected network.

If you're on Ethereum Mainnet, check ETH.

If you're on BNB Smart Chain, check BNB.

If you're on Base, check ETH on Base.

If you're on Polygon, check POL.

You can also inspect the public address on the corresponding network's block explorer.

Step 3: Check the Transaction Amount

Are you trying to send the entire native-token balance?

Suppose you have 0.01 ETH and attempt to send 0.01 ETH.

For a conventional Ethereum transfer, the wallet also needs ETH for gas.

Therefore, the total required balance is greater than 0.01 ETH.

Reduce the send amount or use an appropriate wallet option that reserves funds for the network fee.

Step 4: Inspect the Network Fee Estimate

Open the transaction confirmation screen.

Find the network fee displayed by MetaMask.

Check the expected fee in the network's native currency or another available fee-payment token.

Network fees can change with demand, so the current estimate is more useful than a fee quoted in an old tutorial.

Step 5: Check Whether Gas-Included Payment Is Available

Some MetaMask transactions support paying the network fee with another eligible token.

If your confirmation screen offers a token selector next to Network fee, you may be able to choose a supported asset.

Review the quoted deduction and any additional MetaMask charges.

If the feature isn't offered, don't assume it is available for the particular transaction.

Step 6: Obtain Native Gas Currency if Needed

If the transaction requires native gas, obtain the appropriate asset on the correct network through a supported wallet funding method or legitimate exchange withdrawal.

For example, Ethereum ETH should be delivered to your address on Ethereum Mainnet when you need conventional Ethereum gas.

Check the deposit and withdrawal networks carefully.

Step 7: Recheck the Transaction

Once the required balance is available, reopen the transaction confirmation.

Review:

• Selected network.
• Asset and amount.
• Recipient or contract.
• Estimated network fee.
• Fee-payment currency.
• Transaction permissions.

Proceed only if all details are correct.

MetaMask Insufficient ETH for Gas on Ethereum

Ethereum uses ETH as its native transaction-fee currency.

Sending an ERC-20 token conventionally requires ETH even if the token being transferred is USDT, USDC, DAI or another ERC-20 asset.

Why Does It Happen?

Common reasons include:

• You hold tokens but have no ETH.
• You tried to send your full ETH balance.
• Network fees increased.
• The transaction requires more gas than expected.
• You're viewing another Ethereum account.
• Your wallet's estimate has changed since the transaction was prepared.

How to Fix It

Check MetaMask's estimated network fee and your ETH balance.

If you're sending ETH itself, reduce the amount to leave sufficient funds.

If you're transferring another token, consider whether an eligible gas-included transaction is offered.

Otherwise, obtain enough ETH on Ethereum Mainnet.

Do You Need a Fixed Amount of ETH?

No.

There is no universal minimum such as 0.001 ETH that guarantees every transaction will work.

An ordinary ETH transfer normally consumes 21,000 gas units.

An ERC-20 token transfer, contract approval or swap may require substantially more.

The required amount also depends on the gas price at execution.

MetaMask Insufficient BNB for Gas on BNB Smart Chain

BNB Smart Chain uses BNB for native transaction fees.

Holding USDT, BUSD or another BEP-20 token does not automatically provide a BNB balance.

Example

Your wallet holds:

• 50 USDT on BNB Smart Chain.
• 0 BNB.

You attempt a standard token transfer.

MetaMask may display an insufficient-funds error because BNB is needed to pay the network fee.

How to Fix It

First check whether MetaMask offers an eligible gas-included transaction using a supported token.

If not, obtain BNB specifically on BNB Smart Chain.

Do not assume that holding BNB on another blockchain makes it available here.

Also verify the exact sending address and selected network.

MetaMask Insufficient ETH for Gas on Base

Base is an Ethereum Layer-2 network.

Its native gas currency is ETH, but the balance must be available on Base.

Common Mistake

You have 0.02 ETH on Ethereum Mainnet.

You select Base in MetaMask and attempt to send USDC.

Base displays no native ETH balance, so the conventional transaction cannot be completed.

Your Ethereum mainnet balance does not automatically fund Base gas.

How to Fix It

Check the Base ETH balance for the active wallet address.

If an eligible MetaMask gas-included transaction is available, review that option.

Otherwise, fund your Base account with ETH through a verified method that explicitly supports Base.

This might involve a supported Base withdrawal or bridge, but these actions have their own requirements and fees.

Do not send ETH on a different network without checking the intended receiving network.

MetaMask Insufficient POL for Gas on Polygon

Polygon PoS uses POL as its native gas currency.

Older guides frequently refer to MATIC, which was the previous token name.

Typical Error

You hold a token such as USDC on Polygon, but your POL balance is too low.

A conventional transaction cannot proceed without the gas requirement being met.

How to Fix It

Check the selected network is Polygon PoS.

Verify your native POL balance.

Look for an eligible gas-included payment option.

If unavailable, fund the account with POL on Polygon PoS through a supported route.

Can Ethereum ETH Pay Polygon Gas Directly?

Not through the ordinary native-gas mechanism.

Holding ETH on Ethereum Mainnet does not mean that balance is available for Polygon PoS transaction fees.

Use the actual network's supported gas currency or a MetaMask feature that explicitly handles payment with another token.

Why Does MetaMask Say "Insufficient Funds" Even When You Have ETH?

Seeing an ETH balance does not always mean the transaction has enough gas.

You May Be on the Wrong Network

ETH on Ethereum, Base and Arbitrum represents network-specific holdings.

Check the selected chain.

You May Be Using the Wrong Account

A MetaMask wallet can contain multiple accounts.

The account selected for the transaction must hold the relevant balance.

Your Send Amount May Be Too High

If sending native ETH, you need to fund both the amount and the fee.

The Fee Estimate May Have Increased

The fee quoted earlier may no longer match current network conditions.

A Previous Transaction May Be Pending

An unconfirmed transaction can complicate the account's available balance or transaction sequence.

Check the activity list and relevant blockchain explorer.

Your Transaction May Require More Gas

A swap, token approval or contract interaction may consume much more gas than an ordinary native-coin transfer.

There May Be a Wallet Display Problem

Check the actual on-chain balance on the correct network explorer.

If it differs from the MetaMask interface, investigate the wallet's network connection or account selection.

MetaMask Confirm Button Greyed Out: What Does It Mean?

Sometimes MetaMask prevents a transaction before it is submitted.

The Confirm button may be greyed out when the wallet detects that the transaction cannot meet its fee or balance requirements.

What to Check

1. Selected network.
2. Active wallet account.
3. Available native gas token.
4. Amount being sent.
5. Network fee estimate.
6. Whether another fee-payment option is available.
7. Any warning about transaction simulation or contract behaviour.

Do not repeatedly change gas settings simply to make the button active.

The wallet may be preventing an invalid or unaffordable transaction.

How Are Ethereum Gas Fees Calculated?

Ethereum gas fees depend on two main quantities:

1. The number of gas units consumed.
2. The effective fee per gas unit.

For a typical EIP-1559 Ethereum transaction, the effective per-unit price includes the base fee and priority fee, subject to the transaction's maximum fee settings.

The simplified formula is:

Gas fee = Gas used × Effective gas price

Gas prices are commonly expressed in gwei.

One gwei equals 0.000000001 ETH.

Example: Ordinary ETH Transfer

Suppose:

• Gas used: 21,000 units.
• Base fee: 10 gwei.
• Priority fee: 2 gwei.
• Effective fee: 12 gwei.

Then:

21,000 × 12 = 252,000 gwei.

Converted to ETH:

0.000252 ETH

This is a hypothetical calculation, not a live gas quote.

Gas Calculation Table

These examples illustrate the formula.

ERC-20 transfers and swaps don't have one universal gas-unit requirement.

Use the current transaction simulation or wallet estimate for the actual operation.

Gas Limit vs Gas Price: What's the Difference?

These two terms are often confused.

Gas Limit

The gas limit is the maximum amount of computational work that the transaction is permitted to consume.

Gas Price

Gas price is the amount paid for each unit of gas.

Maximum Fee per Gas

This is the sender's configured ceiling for the fee per unit of gas.

Under Ethereum's EIP-1559 fee system, the actual effective fee can be lower than this ceiling.

Priority Fee

This is an additional per-unit fee that helps incentivise transaction inclusion.

Comparison

Increasing the gas limit does not automatically make a transaction execute faster.

Likewise, reducing the gas limit below the computation required can cause failure.

MetaMask normally estimates the gas limit automatically.

Most beginners should leave the recommended settings unchanged.

Why Does MetaMask Reserve More ETH Than the Final Fee?

The wallet may need to verify that you can afford the maximum amount a transaction is authorised to spend.

A transaction can have a gas limit and maximum fee per gas that exceed the amount ultimately consumed.

For a conventional Ethereum transaction, the relevant maximum possible network cost is broadly:

Gas limit × Maximum fee per gas

The actual network fee is determined by the gas used and effective price.

Unused gas capacity and unused fee allowance are not charged as if they were fully consumed.

Example

Suppose MetaMask displays a maximum gas allowance of:

• 50,000 gas units.
• 20 gwei maximum fee.

Maximum authorised network cost:

50,000 × 20 gwei = 0.001 ETH.

If the transaction uses only 35,000 units at an effective price of 12 gwei, its execution fee would be:

35,000 × 12 gwei = 0.00042 ETH.

These are illustrative values.

The wallet may require sufficient balance for the upper limit even though the final charge is lower.

Can You Pay MetaMask Gas Fees With USDT or USDC?

Sometimes, yes.

MetaMask's gas-included transactions feature can let users cover gas fees with certain supported non-native tokens.

The feature works by handling the necessary gas payment through MetaMask's supported mechanism.

It does not change the blockchain's underlying fee requirements.

Supported Network Examples

MetaMask documentation lists gas-included transaction support for:

• Ethereum Mainnet.
• BNB Smart Chain.
• Base.
• Polygon.
• Arbitrum.
• Linea.

The documentation also describes support for specific additional networks and transaction types.

Available tokens differ by network.

For example, USDT and USDC are among the supported fee-payment options on several networks.

However, not every token, transaction or wallet setup qualifies.

Requirements

MetaMask documents settings including:

• Smart Transactions enabled.
• Estimate balance changes enabled.
• A compatible wallet version and transaction type.
• An eligible token balance on the relevant network.

In some cases, a smart account is required or used.

How to Check the Option

Open the transaction confirmation.

Look beside the Network fee field for a token selector or supported fee-payment option.

If the option appears, inspect the full quote.

MetaMask may include its own fee for the gas-payment service.

Select it only if the total cost and transaction details are acceptable.

Is This the Same as Free Gas?

No.

Usually, the fee is still economically paid, but it is deducted or covered using another eligible token.

Don't confuse not requiring ETH in your wallet with having no fee.

MetaMask also has separate sponsorship features for selected networks and transactions, but these are not universal.

How to Estimate MetaMask Gas Fees Before Sending

The most relevant gas estimate is the one attached to your particular transaction at the time you intend to send it.

Use the MetaMask Confirmation Screen

MetaMask displays estimated fees for transactions.

This estimate incorporates the selected network and transaction characteristics.

Use a Relevant Network Explorer

For Ethereum Mainnet, you can inspect gas conditions through Etherscan.

For BNB Smart Chain, use BscScan.

For Base, use BaseScan.

For Polygon, use PolygonScan.

An explorer's general gas indicator is useful background information but does not fully calculate the gas required for every contract interaction.

Recheck Before Confirming

Network activity changes.

An old estimate may no longer be suitable.

Avoid Guessing the Gas Limit

A simple ETH transfer consumes less computation than a complex swap.

Do not apply the 21,000-gas baseline to an arbitrary ERC-20 approval or decentralised exchange transaction.

MetaMask Gas Fee Troubleshooting Decision Table

Why Did My Transaction Fail Even Though I Paid Gas?

Ethereum transaction execution consumes computational resources.

A transaction that reaches execution and fails may still incur gas fees.

This happens because the network has processed computational work even when the intended action is reverted.

Out-of-Gas Error

An out-of-gas error occurs when a transaction consumes its permitted gas without completing.

The transaction may revert, and the gas spent during execution can still be charged.

Smart Contract Revert

A smart contract can reject an operation for reasons unrelated to having enough gas.

Examples include failing a contract condition or insufficient token approval.

Increasing fees will not necessarily fix a logical contract failure.

Gas Paid for Failed Transactions

A failed transaction does not always mean MetaMask itself charged an additional service fee.

For ordinary blockchain execution, the network fee is associated with the transaction.

MetaMask states that it cannot refund ordinary gas fees paid for network computation.

How to Investigate

Find the transaction hash.

Open it on the appropriate network explorer.

Check:

• Status.
• Gas used.
• Effective gas price.
• Any visible revert reason.
• Recipient contract.
• Transaction type.

Do not keep repeating an unknown failing transaction. Multiple failed attempts can incur additional costs.

Insufficient Funds vs Out of Gas vs Pending Transaction

These messages describe different situations.

Why the Difference Matters

An insufficient-funds error may be fixed by correcting the balance, amount, network or fee-payment method.

An out-of-gas error requires examination of execution and gas limits.

A pending transaction requires transaction-status troubleshooting.

These should not be treated as interchangeable.

How to Reduce Gas Costs Safely

There is no guaranteed way to eliminate fees on every transaction.

However, some decisions can avoid unnecessary cost.

Check Current Network Conditions

Gas prices vary with network demand.

If your transaction isn't urgent, you can compare fee estimates at another time.

Avoid Unnecessary Contract Transactions

Every unnecessary approval, swap or transfer can create another fee.

Review whether the action is actually required.

Use Appropriate Supported Networks

Some applications support multiple networks.

Lower-cost alternatives may be available, but only use a network explicitly supported by the asset, application and recipient.

Review Gas-Included Options

Check whether an eligible alternative fee-payment method produces an acceptable total cost.

Avoid Excessively Aggressive Fee Settings

Increasing the priority fee may cost more without providing a proportional benefit.

Don't Lower the Gas Limit Arbitrarily

A gas limit that is too low can cause execution failure.

MetaMask Gas Problems on Mobile vs Desktop

The underlying network requirements are generally the same on both platforms.

However, the interface can differ.

MetaMask Extension

The browser extension includes transaction confirmation controls and relevant gas settings.

MetaMask Mobile

The mobile app provides transaction confirmation and network fee information, but some controls may appear in different menus.

What If the Screens Don't Match a Tutorial?

Use MetaMask's current official documentation.

Wallet interfaces are updated regularly.

Avoid making financial decisions based on outdated screenshots.

Security Tips When Fixing MetaMask Gas Errors

A gas warning should not require sharing private wallet credentials.

Never Reveal Your Seed Phrase

No support agent needs your recovery phrase to calculate gas fees.

Verify Network Funding

If you're acquiring ETH, BNB or POL, confirm the intended blockchain.

Avoid Fake Gas-Fee Websites

An unknown website may claim you must connect your wallet to fix gas.

Check whether the action is actually necessary.

Inspect Wallet Approvals

A gas-fee problem does not justify granting an unrelated smart contract unlimited token spending permission.

Beware of Fake Support Agents

People may offer to resolve wallet errors through direct messages.

Use MetaMask's official support centre instead.

Avoid Manual Gas Changes You Don't Understand

Modifying gas limits and transaction settings without understanding them can cause delays, higher fees or failed transactions.

Frequently Asked Questions

Why does MetaMask say insufficient funds for gas?

Usually because the wallet cannot meet the network fee and balance requirements for the transaction.

Can I send USDT without ETH in MetaMask?

On Ethereum, a conventional ERC-20 transfer requires ETH for gas. Eligible MetaMask gas-included transactions may allow certain other tokens to cover the fee.

Why do I have USDT but cannot send it?

You may lack the network's gas currency, have selected the wrong account, or face another transaction restriction.

How much ETH do I need for gas?

It depends on the current gas price and the computation required. Use MetaMask's live transaction estimate.

What is the minimum ETH balance required in MetaMask?

There is no single minimum that covers every Ethereum transaction.

Can I pay MetaMask gas with USDT?

For eligible gas-included transactions on supported networks, yes. The option is not available universally.

Can I pay gas with USDC?

USDC is supported as an alternative fee-payment token for certain MetaMask transactions, subject to network and feature requirements.

Is MetaMask gas included the same as free transactions?

No. In most cases, the fee is covered using another token rather than eliminated.

How do I fix insufficient BNB for gas?

Check BNB Smart Chain, your native BNB balance and any supported gas-included payment option.

Why do I need ETH on Base?

Base uses ETH as its native gas currency. ETH held on Ethereum Mainnet isn't automatically available on Base.

What gas token does Polygon use?

Polygon PoS uses POL, which replaced MATIC as the native gas token.

Can I use ETH to pay gas on Polygon?

Not as the ordinary native Polygon gas currency. Eligible MetaMask fee-payment features may support alternatives.

Is gas cheaper on Base than Ethereum?

Base transactions often have different fee characteristics from Ethereum Mainnet, but fees vary with the operation and network conditions.

Why is my MetaMask confirm button greyed out?

The wallet may have detected insufficient balance or another condition preventing transaction confirmation.

Why does MetaMask show insufficient funds when I have ETH?

Possible causes include a different selected network, a different account, an amount that leaves no gas balance or an increased fee estimate.

How do I calculate Ethereum gas?

Multiply actual gas used by the effective gas price. Wallets calculate the estimate automatically before submission.

What is a gas limit?

It is the maximum number of gas units the transaction can consume.

What is the difference between gas price and gas limit?

Gas limit measures permitted computation. Gas price determines the fee per unit.

Do unused gas units get charged?

Gas units not actually consumed are not charged as though the full limit were used. The wallet may still require sufficient upfront balance for maximum authorised cost.

Can I send my full ETH balance?

The amount sent must account for the fee. Use a wallet function that estimates the maximum sendable amount where available.

Why did I pay gas for a failed transaction?

Executed blockchain computations can incur fees even when the transaction reverts.

Can MetaMask refund failed gas fees?

MetaMask generally cannot refund network fees for transactions that consumed gas.

Can I lower the gas limit to save money?

Lowering the gas limit below what the operation requires can cause failure and does not reduce the computation intrinsically required.

Can I cancel a pending transaction?

Some pending Ethereum transactions can be replaced or cancelled before confirmation. This is a different problem from insufficient funds.

Does switching networks move my ETH?

No. Network switching changes the blockchain view and does not transfer assets between networks.

Do I need BNB to swap tokens on BNB Smart Chain?

BNB is the native gas asset, but eligible MetaMask gas-included swaps may cover the fee using another supported token.

Can I fix the error without buying more crypto?

Possibly, if you have enough of an eligible alternative fee-payment token and MetaMask offers the appropriate feature.

Is the gas fee the same for sending ETH and swapping tokens?

No. Swaps typically involve more complex operations and often require more gas.

Can I fix insufficient funds for gas by importing the token again?

No. Token import changes wallet display, not the native gas balance or transaction requirements.

What if MetaMask shows a much higher fee than expected?

Review the selected network, transaction type, contract interaction, gas estimate and any available fee-payment options before proceeding.

Does MetaMask charge all gas fees itself?

Ordinary blockchain gas is a network charge. Some MetaMask services can include separate service fees that should be disclosed in the transaction quote.

Conclusion

MetaMask's "insufficient funds for gas" error usually means the transaction cannot meet its network fee requirements.

The correct currency depends on the blockchain:

• Ethereum Mainnet uses ETH.
• BNB Smart Chain uses BNB.
• Base uses ETH held on Base.
• Polygon PoS uses POL.

However, supported MetaMask gas-included transactions may allow some users to cover fees with other eligible tokens.

To resolve the error, first check the selected network and wallet account, then review your native currency balance, transaction amount and current fee estimate.

If an eligible alternative fee-payment option is available, review its full cost. Otherwise, obtain enough of the correct network's native currency through a verified route.

Avoid changing advanced gas settings without a clear reason, and never disclose your recovery phrase to anyone offering wallet support.

The safest fix is to identify the exact network and transaction requirement before adding funds or approving anything.

Authoritative References

1. MetaMask — Fix Insufficient Funds or Disabled Confirm Button
2. MetaMask — Gas Fees, Limits and Network Fees
3. MetaMask — Use Gas-Included Transactions
4. MetaMask — Use Gasless Swaps
5. MetaMask — How to Estimate the Gas Fee
6. MetaMask — Why Did I Pay Gas for a Failed Transaction?
7. Ethereum.org — Gas and Fees
8. Ethereum.org — Ethereum Transactions
9. BNB Chain — BNB Smart Chain Developer Quick Guide
10. Etherscan — Ethereum Gas Tracker
11. BaseScan — Base Explorer
12. PolygonScan — Polygon PoS Explorer

Disclaimer: This guide is educational and does not provide financial advice or wallet recovery services. Blockchain transactions may be irreversible, and some failed transactions still incur fees.

This article is general information, not financial advice. Qbitics is not affiliated with Qubetics or any exchange or wallet named here. See our disclaimer.