Why Do Some Blockchains Have Lower Gas Fees Than Others?

First of all you should know that gas fees were not invented to make blockchains expensive. They were invented to keep blockchains alive.

When Bitcoin was launched, the network needed a way to stop people from spamming it with unlimited free transactions. So Bitcoin introduced a small fee based on the size of transaction data, and not the amount of crypto being sent.

This kept the network honest, without the need for supervision by anyone in charge.

Ethereum took this idea further. Since Ethereum was built to run smart contracts and not only send coins around, it needed a way to charge more for actions that required more computing work. And this is where the word “gas” actually came from.

Every action you perform on the Ethereum network, whether it’s sending a coin, swapping a token, or minting an NFT, it uses a certain amount of gas, and that gas has a price attached to it.

For years, this gas fee was decided purely through an auction. Users bid against each during high congestion periods, where Ethereum gas fees were going up to $50 or more during a popular NFT drop or a DeFi rush.

Users used to compete with each other just to get their transaction processed first.

To understand this more better, here is an example: Think of Ethereum as a bus with only 100 seats, and thousands of people wanting to get on.

To get a seat, everyone puts cash in a sealed envelope and hands it over to the bus driver; the driver would give seats to those with the highest bid.

In this system, the user had to guess what others were bidding. And because of this, users might pay $50 for a seat when $5 were enough, but to make sure they got on, users bid much higher.

In August 2021, Ethereum made an upgrade in this auction system, they changed the old auction system with a new system called EIP-1559, and it changed this system for good.

Now instead of pure bidding war, the network started setting a base fee automatically, based on how full recent blocks were, and users only had to add a small tip on top of that to move up the queue.

Let’s continue the example, now the bus is the same but they have upgraded their system into fare (like a metered taxi with a set), Now whenever you use this bus, first you have to pay a base fee based on how busy it is. If the bus is full, the price goes up a little. If it’s empty, then the price goes down. Everyone pays the exact same base rate.

Then in September 2022, Ethereum made an even bigger change. It moved away from proof of work, the same energy-heavy system Bitcoin still runs on today, and shifted to proof of stake.

This upgrade is known as the Merge, and it cut Ethereum's energy use by a massive margin almost overnight.

While Ethereum was doing all these changes, other blockchains were also rebuilding themself from scratch with speed and low fees as the main goal.

Solana was designed in such a way that it can process many transactions at the same time, instead of one after another.

Whereas, Polygon and BNB chain focused on staying compatible with Ethereum's ecosystem while keeping their own fees low.

While Ethereum was going through all of this, other blockchains were being built from scratch with speed and low fees as the main goal.

Solana was designed to process many transactions at the same time instead of one after another.

Polygon and BNB Chain focused on staying compatible with Ethereum's ecosystem while keeping their own fees low.

Ethereum itself took a different approach to solve the same problem. Instead of building a brand new blockchain from the ground up, independent teams created networks like Arbitrum, Base, and Optimism to sit right alongside Ethereum and handle most of the transaction traffic themselves.

Arbitrum was built by Offchain Labs, Base was built by Coinbase, and Optimism was built by its own foundation, none of them are run by Ethereum's core team.

What connects them is that they all plug into Ethereum's infrastructure rather than replacing it, sending back only a short summary of activity instead of making Ethereum process every transaction itself.

This meant Ethereum could keep its security and trust intact, while still becoming faster and cheaper to use through these added layers.

This is also why many users now prefer wallets that support different blockchain networks instead of depending on only one chain. A multi-chain crypto wallet gives users more flexibility when choosing networks based on transaction costs and availability.

This is the reason why gas fees now look nothing like the gas fee people were paying a few years back, and why it looks very different depending on the blockchain you choose.

Now that you know that gas fees have gone through so many changes, the next natural question your mind will be struck with is, what exactly decides how much I pay right now, on this particular chain, for this specific transaction?

Basically there are four things which decide this. How the blockchain reaches consensus, how many transactions it can process at once, whether it settles its own security or borrows it from another network, and how busy that network happens to be at that exact moment.

The Consensus Mechanism Behind the Network

A consensus mechanism is simply the method of a blockchain which is used to agree that a transaction is real and valid before it gets added to the chain permanently. This is where the big fee difference actually starts.

Bitcoin still runs on proof of work, in which miners compete using real computing hardware to solve a puzzle and win the right to add the next block.

This competition burns large amounts of electricity and equipment costs, and part of that expense naturally gets passed on to users through fees.

Ethereum, on the other hand, switched to proof of stake since the merge. In this validators lock up ETH instead of burning the electricity to earn the right to confirmation transactions.

Solana, Polygon, and BNB Chain all use proof of stake or a close variation of it as well.

Whereas TRON uses its own version called delegated proof of stake, where a fixed group of 27 elected validators, known as super representatives, take turns producing blocks.

Networks that do not depend on using high energy mining generally have far lower infrastructure costs to cover, and that difference shows up directly in what you pay to use them.

How Many Transactions the Network Can Handle

This is usually called throughput, or transactions per second. You can think of it like the number of lanes on a busy highway.

You can think of Ethereum’s main network like a highway without only one or two lanes open. No matter how much traffic is there, only a few number of cars can move at a time.

That is why it handles around 15 to 30 transactions per second.

Whereas Solana, on the other hand, works like an express highway with hundreds of lanes running side by side. And because of multiple lanes running side by side so many cars can travel at once instead of queuing behind each other, it can comfortably handle several thousands of transactions per second under normal conditions.

Layer 1 Versus Layer 2 Design

A layer 1 blockchain is the base network itself, such as Ethereum, Bitcoin, or Solana. Whereas, a layer 2 network is built directly on top of layer 1 to process transactions faster and cheaper, then send a short summary of all the activities performed back to the base chain or Layer 1 chain it is live on.

Networks like Arbitrum, Base, and Optimism are Layer 2 networks and work exactly this way on top of Ethereum. Instead of every single transaction competing for space on ETH’s mainnet, thousands of them get bundled together and posted as one entry.

On March 13, 2024 Ethereum's Duncen upgrade made this bundling even more cheaper by introducing a more efficient way to store that data, and layer 2 fees dropped sharply because of it.

Because of this many layer 2 transactions today cost a fraction of a cent to a few cents, way more less than what the same action would cost directly on the mainnet.

How Busy the Network Is Right Now

Even the cheapest blockchains are not resistant to demand spikes. Like a popular NFT mint or a sudden wave of meme coin trading can push fees higher for a short window on almost any network, including Solana.

Real-time high demand for block space is genuinely one of the top and biggest reasons for fee volatility on every chain, whether it's cheap or already expensive.

This is why a network can feel perfectly affordable on a quiet Tuesday afternoon, and suddenly it gets expensive in the evening because of a major token launch.

Most fee-based networks work on two things. How much computational work your transaction actually needs, and how much you are ready to pay per unit for that work.

We will use a simple Ethereum transfer as an example. The network sets a base fee automatically based on how full recent blocks have been, on top of that you can add an optional tip to get processed faster.

A basic transfer uses a small, fixed amount of computational work which is 21,000 units of gas. Multiply these by the base fee plus your tip, and that is the total cost paid out in ETH.

When the network is busy this base fee rises automatically to manage the demand. And when the network is quiet, the base fee drops on its own.

Other networks simplify this even further. Solana charges a flat base fee per transaction, with an optional priority fee if you want to jump ahead in the queue.

The same logic applies when performing more advanced blockchain activities like token exchanges, where network congestion and transaction complexity can affect the final cost. You can learn more about how crypto swaps work and why they require blockchain fees.

Whereas Bitcoin bases its fee on the size of the transaction in data, and not on the dollar or any other currency value being sent.

While, TRON converts the computational cost into units which they call energy and bandwidth, which the user can pay directly or cover in advance by staking TRX.

The names change from network to network, one says gas fees so other says energy, this fee is known by many different names, but the logic behind it stays consistent. More computational work, or more urgency to get processed fast, generally means a higher fee.

These numbers move constantly, sometimes it will be lower, other times it will be high, so treat this as a general picture rather than a fixed price list.

Always consider checking a live gas tracker for the network you are using right before you send anything.

• Ethereum mainnet: After many upgrades and changes, typical transfers now cost somewhere between a few cents and around thirty cents under normal conditions. This is much lower from the multi-dollar fees people were paying a few years back using Ethereum’s Mainnet. Still complex actions like swaps or NFT mints cost more and price can still spike during heavy congestion.

• Ethereum Layer 2s (Arbitrum, Base, Optimism): Often a fraction of a cent to a few cents for standard transactions since the cost is shared across thousands of bundled transactions at once.

• Solana: A fixed base fee of 0.000005 SOL per transaction, plus an optional priority fee during busy periods. Total cost typically lands under two cents, and often under half a cent.

• Polygon PoS: Usually a fraction of a cent per transaction, which makes it one of the cheaper EVM-compatible options for everyday use.

• BNB Smart Chain: Generally low, with typical stablecoin transfers landing under a dollar, though this shifts with network activity.

• TRON: Carries a reputation as the cheapest way to move USDT, but the real cost depends heavily on your wallet's resources. Since USDT is one of the most commonly used stablecoins for transfers, understanding what stablecoins are and how they work can help users make better decisions when choosing networks. A TRC-20 USDT transfer typically runs one to a few dollars in energy costs unless you've staked TRX in advance to cover it, and sending to a brand-new wallet costs roughly double, since the network has to set up a fresh storage entry for it.

• Bitcoin: Fees are based on transaction data size, not on the dollar amount being sent. Under normal conditions this averages under a dollar, but fees have spiked well above that during periods of heavy network congestion, particularly around halving events.

Before simply assuming any blockchain is the cheapest option, here is an interesting point worth knowing. “Cheap network” and “cheap for this specific transaction” are not always the same thing.

TRON is a good example of this. TRON has built a strong reputation for low-cost USDT transfers, and honestly, that reputation is often deserved.

But if 

TRON is a good example of this. It's genuinely known for cheap USDT transfers, and most of the time, that reputation holds up.

But there's one thing that catches people off guard: sending USDT to a wallet for the very first time. If that wallet has never held USDT before and you don't have any TRX staked to cover the network fee, the transfer can suddenly cost a lot more than usual.

This isn't a glitch or something going wrong on your end. TRON simply has to create a brand-new storage entry for that wallet before it can hold USDT, and that setup work costs extra. Once the wallet is active, every transfer after that goes back to being cheap.

The real lesson here is that no single chain is universally cheap or universally expensive in every situation. The actual cost depends on the type of transaction, the state of the recipient's wallets, and how busy the network is at that time.

This is one of the reasons beginners should understand the basics before making transactions, because small mistakes in choosing networks or managing wallets can increase unnecessary costs. Many users make similar crypto mistakes when starting out.

A network’s general reputation is a decent starting point, but do remember it is not a guarantee, and treating it like one blockchain can cost you more than you need to pay is wrong.

A few simple habits genuinely make a difference in what you end up paying.

• Check a live gas tracker for your network before sending, since fees can shift within minutes.

• Avoid sending during known high-traffic windows, such as major NFT drops or token launches or in the peak time when the market opens or closes, if you are not in a hurry.

• Use a Layer 2 network instead of mainnet for smaller, everyday transactions whenever that option is available to you.

• Pick the cheapest network your recipient actually supports for the coin you're sending, instead of using your preferred network or network you used last time. 

• Keep transactions simple. Bundling several actions into one complex smart contract call usually costs more than doing them separately when you have the time.

This is also exactly where a wallet which supports multiple networks becomes genuinely useful, not just convenient. Modern crypto wallets are not only designed for storing assets. Users can now manage transactions, interact with different networks, and perform multiple activities from one place. Learn more about what you can do with a crypto wallet beyond simple storage. Because you can choose which network to use for a given coin.

This is why choosing a wallet with proper network support is important. A good wallet should give users flexibility instead of limiting them to one blockchain. If you are comparing options, our guide explains how to choose a crypto wallet based on security, features, and usability.

Rather than being locked with one chain, multi-chain gives you the option to route a transaction through whichever chain actually makes sense for that moment.

Some modern wallets also go beyond storage and transactions by allowing users to spend their crypto directly in everyday situations through a virtual crypto card.

Oppi Wallet is built around this idea, it lets you manage and move crypto across several supported networks from one place instead of jumping from one wallet to another for each chain.

If you are still getting familiar with what it actually means for a wallet to give this kind of control in the first place, then you can read our complete beginner guide to self-custody wallets which walks you through how ownership, security, and recovery work in self-custody setup.

What are gas fees in crypto?
A gas fee is simply what you pay to get your transaction processed on a blockchain. That fee goes to whoever is confirming your transaction, whether that's a miner or a validator, and it's also what keeps the network from getting flooded with spam.

Why is Ethereum gas more expensive than Solana?
Honestly, it comes down to capacity. Ethereum's mainnet can only handle a small number of transactions at a time, so when demand goes up, people end up competing for that limited space and fees rise. Solana was built to process way more transactions at once, so it rarely runs into that same bottleneck. That said, Ethereum's own Layer 2 networks like Arbitrum, Base, Optimism, etc close a lot of this gap.

Do all blockchains charge gas fees?
Pretty much, yes. Almost every public blockchain charges some kind of network fee, even though the name and how it's calculated change from chain to chain. A handful of specialized networks subsidize or minimize fees for specific use cases, but that's the exception, not the norm.

Can gas fees change while I'm sending a transaction?
Yes, and this catches a lot of people off guard. Gas fees move with real-time network demand, so the estimate you see right before hitting send can shift by the time your transaction actually confirms, especially if the network gets busy in that window.

Is TRON really the cheapest way to send USDT?
Often, but not always, and that "not always" part matters. TRON is generally cheap for USDT transfers, especially if you've staked TRX ahead of time to cover the energy cost. But skip that step, or send to a brand-new wallet, and the cost can end up higher than most people expect.

Will gas fees stay this low, or will they rise again?
Fees move with demand, so yes, they can spike again even on networks known for being cheap. Upgrades that add more capacity, like Ethereum leaning further into Layer 2 scaling, tend to push fees down over the long run, but short-term spikes during high-demand events are just normal, on every network out there.

What happens if I don't pay enough gas?
Your transaction usually just sits there stuck, or fails outright, since validators prioritize transactions offering higher fees first. On Ethereum, if you set your fee too low during a busy period, your transaction can stay pending for a long time before either going through or timing out completely.

Does a higher gas fee mean my transaction gets confirmed faster?
Yes, in most cases. Paying a higher tip or priority fee signals to validators that your transaction is worth processing first, so it jumps ahead of others offering less. This matters most during busy periods, since during quiet times, even the minimum fee usually confirms quickly.

Where does my gas fee actually go?
It depends on the network. On Ethereum, the base fee portion is burned permanently and removed from circulation, while the tip you add goes directly to the validator who confirms your transaction. On other chains like Bitcoin or TRON, the entire fee typically goes to whoever processes the block.

Why did my friend pay a different fee than me for the exactsame transaction?
This usually comes down to timing, not the transaction itself. Gas fees shift constantly based on how busy the network is at that exact moment, so even a few minutes' difference, or one of you adding a bigger tip, can change what you both end up paying.

Can I get my gas fee refunded if a transaction fails?
Generally, no. Once a validator does the work of processing your transaction, even a failed one, that computational effort still gets paid for. This is why it's worth double-checking transaction details before confirming, especially for complex smart contract interactions.

Do swaps and NFT mints cost more gas than a simple transfer?
Yes, noticeably more. A basic transfer only needs a small, fixed amount of computational work, but swaps and mints involve smart contracts doing extra calculations behind the scenes, which uses more gas and costs more as a result.

Does the wallet I use affect how much gas I pay?
Not directly, since gas fees are set by the network itself, not your wallet. But some wallets let you choose your network more easily, adjust priority fees manually, or route your transaction through a cheaper Layer 2, all of which can meaningfully affect your final cost.

Is it possible to avoid gas fees completely?
Not entirely, no. Almost every blockchain charges some fee to process transactions, since that's part of what keeps the network secure and spam-free. What you can do is minimize it, by using Layer 2 networks, avoiding busy periods, and picking the cheapest network your recipient supports.

Are gas fees different for buying crypto versus sending it?
Yes, they often are. Buying crypto through an exchange usually involves a separate trading or platform fee, while sending crypto on-chain only involves the network's gas fee. If you withdraw crypto from an exchange to your own wallet, you'll typically pay both the exchange's withdrawal fee and the network's gas fee.

Gas fees stop feeling random the moment you understand what's actually driving them, how a network reaches consensus, how much traffic it can handle, whether it stands on its own or builds on top of another chain, and how busy things are right at that moment. None of that is fixed. It shifts by the network, and honestly, it can shift by the minute.

And as the TRON example showed, even a chain with a genuinely cheap reputation can surprise you depending on the specific transaction, so it's worth remembering that "cheap network" and "cheap for this transaction" aren't always the same thing.

The practical takeaway is simple: check current fees before you send, match the network to the transaction instead of defaulting to habit, and use a wallet that actually gives you the flexibility to choose rather than locking you into one chain.

That's exactly the kind of control Oppi Wallet is built around, letting you manage and move crypto across multiple networks and spend with a virtual crypto card, all from one place. Download it for iOS or Android and see it for yourself.