When you send a transaction on Ethereum, you may see terms such as base fee, priority fee, and gas fee. Understanding the difference between the Ethereum base fee and priority fee can help you estimate transaction costs and understand where your ETH goes when you make a transaction.
The base fee is the minimum fee required for a transaction to be included in an Ethereum block, while the priority fee, also called a tip, is an additional amount paid to the validator to encourage faster transaction inclusion.
In simple terms:
Ethereum transaction fee = Base fee + Priority fee
The base fee is determined by the Ethereum network, while the priority fee is selected by the user or wallet.
What Is the Ethereum Base Fee?
The Ethereum base fee is the portion of the gas fee that is required by the network for a transaction to be included in a block.
The base fee is determined automatically by Ethereum’s protocol based on network demand and the amount of gas used by recent blocks.
When the Ethereum network is busy, the base fee can increase. When demand decreases, the base fee can fall.
One important feature of Ethereum’s base fee is that it is burned. This means the base fee paid by users is removed from circulation rather than being paid directly to the validator.
What Is the Ethereum Priority Fee?
The priority fee is an additional fee paid to the validator who includes the transaction in a block.
It is commonly called a tip.
The purpose of the priority fee is to give validators an incentive to select a transaction for inclusion, particularly when there are many transactions competing for block space.
Unlike the base fee, the priority fee is paid to the validator.
Ethereum Base Fee vs Priority Fee
The key difference is where the money goes and how the fee is determined.
| Feature | Base Fee | Priority Fee |
|---|---|---|
| Also called | Base fee | Tip |
| Determined by | Ethereum protocol | User/wallet |
| Main purpose | Required network fee | Incentivize validator inclusion |
| Paid to validator? | No | Yes |
| Burned? | Yes | No |
| Changes with network demand? | Yes | Can vary based on user preference |
| Part of transaction cost? | Yes | Yes |
How Ethereum Gas Fees Work
Ethereum uses a gas system to measure the computational resources required to execute transactions and smart contracts.
For a transaction, the total amount paid depends on:
Gas used × (Base fee + Priority fee)
For example, suppose a transaction uses 21,000 gas, the base fee is 20 gwei, and the priority fee is 2 gwei.
The effective gas price would be:
20 gwei + 2 gwei = 22 gwei
The transaction fee would therefore be:
21,000 × 22 gwei = 462,000 gwei
Since 1 ETH equals 1,000,000,000 gwei:
462,000 gwei = 0.000462 ETH
Of that amount, the portion corresponding to the base fee is burned, while the priority-fee portion goes to the validator.
What Is Gwei on Ethereum?
Gwei is a smaller unit of ETH commonly used to express gas prices.
One ETH equals:
1 ETH = 1,000,000,000 gwei
Because Ethereum gas prices are often much smaller than one ETH, wallets and blockchain applications commonly display fees in gwei.
For example, a wallet might show:
- Base fee: 15 gwei
- Priority fee: 1 gwei
- Total gas price: 16 gwei
The actual amount of ETH paid depends on the gas used by the transaction.
Who Sets the Ethereum Base Fee?
The Ethereum protocol determines the base fee automatically.
It is not manually selected by an individual user or validator.
Ethereum adjusts the base fee according to network usage. The system is designed so that the base fee rises when demand for block space is high and falls when demand is lower.
This mechanism was introduced with Ethereum Improvement Proposal (EIP-1559).
Who Sets the Priority Fee?
The priority fee is generally selected by the transaction sender or their wallet.
A user can offer a higher priority fee when they want to increase the incentive for a validator to include their transaction.
Wallets typically estimate an appropriate priority fee based on current network conditions.
A higher priority fee does not necessarily guarantee immediate confirmation, because transaction inclusion also depends on factors such as the transaction’s effective gas price and available block space.
What Happens to the Ethereum Base Fee?
The Ethereum base fee is burned.
When a transaction pays the base fee, that ETH is removed from the circulating supply according to Ethereum’s protocol rules.
The priority fee, on the other hand, is paid to the validator.
This distinction is one of the most important differences between the two fees.
Why Does Ethereum Burn the Base Fee?
EIP-1559 introduced the base-fee mechanism partly to make transaction pricing more predictable and to separate the network’s required fee from the validator’s incentive.
Because the base fee is burned rather than paid to validators, validators do not have a direct financial incentive to artificially increase it.
The amount of ETH burned depends on the amount of gas used and the base fee at the time transactions are included.
Is the Base Fee or Priority Fee More Important?
Both fees serve different purposes.
The base fee determines the minimum gas price required under Ethereum’s fee mechanism.
The priority fee provides an additional incentive for validators to include a transaction.
If network demand is low, a small priority fee may be sufficient. During periods of heavy demand, users may choose a higher priority fee if they want their transactions considered more competitively.
However, paying a higher priority fee does not eliminate the base fee. Both components contribute to the transaction’s effective gas price.
What Is the Difference Between Base Fee and Max Fee?
Another important Ethereum fee term is max fee per gas.
With Ethereum’s EIP-1559 transaction format, users can specify:
- Max fee per gas
- Max priority fee per gas
The max fee is the maximum amount the user is willing to pay per unit of gas.
The max priority fee is the maximum tip the user is willing to give the validator.
The actual amount paid can be lower than the maximum fee specified.
For example, if a user sets:
- Max fee: 50 gwei
- Max priority fee: 2 gwei
- Base fee: 20 gwei
The effective gas price can be calculated using the applicable base fee and priority fee, subject to the transaction’s maximum fee limits.
The unused portion of the max fee is not automatically paid to the validator.
What Happens If You Set the Priority Fee Too Low?
A very low priority fee can make a transaction less competitive for inclusion, particularly when the network is busy.
However, the effect depends on current network conditions.
When Ethereum has plenty of available block space, even a relatively small priority fee may be enough.
When demand is high, users may compete by offering higher priority fees.
What Happens If You Set the Max Fee Too Low?
If your maximum fee per gas is below the combination of the current base fee and the priority fee required by your transaction, the transaction cannot be included under those conditions.
This is why wallets generally recommend fee settings based on current network conditions rather than requiring users to calculate everything manually.
Base Fee vs Priority Fee: Simple Example
Suppose you are sending ETH and your transaction uses 21,000 gas.
Assume:
- Base fee = 30 gwei
- Priority fee = 2 gwei
Your effective gas price would be:
30 + 2 = 32 gwei
The transaction cost would be:
21,000 × 32 gwei = 672,000 gwei
Or:
0.000672 ETH
The base-fee portion is:
21,000 × 30 gwei = 630,000 gwei
This amount is burned.
The priority-fee portion is:
21,000 × 2 gwei = 42,000 gwei
This amount is paid to the validator.
Frequently Asked Questions
What is the Ethereum base fee?
The Ethereum base fee is the protocol-determined minimum fee per unit of gas required for a transaction to be included under Ethereum’s fee mechanism. The base fee is burned.
What is the Ethereum priority fee?
The priority fee is an additional amount paid by the transaction sender to the validator as an incentive for including the transaction in a block. It is also called a tip.
Is the Ethereum base fee burned?
Yes. Ethereum’s base fee is burned rather than paid to the validator.
Does the priority fee get burned?
No. The priority fee is paid to the validator who includes the transaction.
Can I choose the Ethereum base fee?
No. Users do not directly choose the base fee. Ethereum’s protocol determines it based on network conditions.
Can I choose the priority fee?
Yes. The priority fee can generally be specified by the user or wallet, although wallets usually recommend an amount based on current network conditions.
Which fee goes to Ethereum validators?
The priority fee goes to the validator. The base fee is burned.
Why does my Ethereum transaction fee change?
Ethereum transaction fees can change because the base fee changes with network demand, while the priority fee can also vary depending on transaction conditions and user preferences.
Is the base fee the same as the gas fee?
Not exactly. The base fee is one component of the total gas price. A transaction can also include a priority fee.
What is the easiest way to remember the difference?
Think of it this way:
Base fee = burned by the protocol
Priority fee = tip paid to the validator
Total gas cost = gas used × effective gas price
Conclusion
The Ethereum base fee and priority fee are two different components of Ethereum’s transaction-fee system.
The base fee is determined by the Ethereum protocol based on network conditions and is burned. The priority fee is an optional additional incentive paid to the validator to encourage transaction inclusion.
Understanding the difference is useful when analyzing Ethereum gas fees, setting transaction fees, and understanding how ETH is burned and distributed during transactions.
The simplest way to remember it is:
Base fee → burned
Priority fee → validator
Transaction fee → base fee + priority fee, multiplied by the gas used
