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⛽ Gas Fees

Last verified: April 2026

Gas is the fee you pay to execute transactions on Ethereum and EVM-compatible blockchains. How it works, why it fluctuates, and how to manage it.

What gas is

Every action on a blockchain — sending tokens, swapping on a DEX, minting an NFT — requires computation performed by the network, and that work isn't free. "Gas" is the fee you pay to have your transaction processed and included in a block. The name is an analogy: just as a car needs fuel to run, a transaction needs gas to execute. Gas fees compensate the validators or miners who secure the network and prevent people from spamming it with junk transactions.

How gas fees are calculated

A fee has two parts: how much computation your transaction requires (a simple transfer is cheap; a complex DeFi interaction is expensive), and the price per unit of that computation, which floats with demand. When the network is busy, everyone competes for limited block space and the price per unit rises — sometimes dramatically. When it's quiet, fees fall. So the same transaction can cost a few cents at 3am and several dollars during a frenzy.

Why fees spike

Block space is limited, so gas is essentially an auction. During popular NFT mints, token launches, or market volatility, thousands of people bid to get their transactions in first, and fees soar. Ethereum's mainnet has historically seen fees climb to tens of dollars during peak demand — which is one of the main reasons Layer 2 networks and other scaling solutions exist.

How to pay less

A few practical habits help. Transact during quieter periods when demand is low. Use Layer 2 networks (like Arbitrum, Optimism, or Base) or low-fee Layer 1s, where the same action can cost a fraction of mainnet fees. Batch actions where possible, and avoid setting an unnecessarily high fee. Most wallets estimate gas for you and let you choose a speed-versus-cost trade-off.

Gas and the India picture

Gas fees are a cost of transacting, separate from India's tax rules — but they matter for record-keeping. Note that paying gas is itself spending a small amount of crypto (the chain's native coin), and frequent on-chain activity generates many small transactions, each of which you should record for the 30% tax and 1% TDS regime. High-frequency on-chain trading can create a meaningful gas and bookkeeping burden.

Gas across different chains

Not all chains call it "gas" or price it the same way, but every blockchain has some transaction fee. Ethereum mainnet is the most famous for high fees during congestion; Layer 2s and many alternative Layer 1s offer the same actions for cents or fractions of a cent. When choosing where to transact, fees are a major practical factor alongside security and the apps available — which is a big reason activity has spread across many chains rather than staying on one.

A quick mental model

Think of block space as seats on a train that leaves every few seconds. Gas is what you bid for a seat. When the train's empty, a seat is cheap; when everyone wants on at once, the price climbs. You can wait for a quieter train (transact later), take a cheaper line (a Layer 2), or pay up to board now. Your wallet is just helping you place that bid.