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Solana swap vs EVM swap costs: the fee is the same, the cost is not

NexFlow states the same flat platform fee on both its Solana and EVM swap surfaces. That is the least interesting number in a swap. The real cost differences are in how each chain charges for the transaction, what you have to sign before you can trade, how slippage is handled, and what you are still exposed to after the swap settles. This page walks through each of those, sourced to the live feature pages, without inventing a dollar figure.

Comparison · updated September 2026 · not financial advice

What the two surfaces are

The Solana swap is a Jupiter-routed swap that settles in one atomic transaction. The quote shows price impact and minimum received before you sign; the platform fee is stated as a flat 1%; Token-2022 assets are supported, which matters because the extension set on those mints is where the traps live. You sign once, the transaction either fully executes or fully fails, and nothing is left behind.

The EVM swap covers Ethereum, Base, Arbitrum, Optimism, Polygon, Avalanche, BSC and Monad, routing through KyberSwap's MetaAggregationRouterV2. The exact transaction is simulated before you are asked to sign, slippage is fixed at 1%, and — the EVM-specific detail — ERC-20 token approvals persist. The feature page names that persistence as the EVM-specific exposure, and it is right to.

The four places a swap costs you

A swap costs you in four places: the platform's fee, the network's fee, the price you get versus the price you saw, and the exposure that outlives the trade. Both surfaces state the same platform fee, so the comparison is entirely about the other three, and those are where the chains genuinely diverge.

Network fee. Solana charges a fixed base fee per signature — 5,000 lamports, per the Solana transaction-fee documentation — plus an optional priority fee you choose. It is small and predictable in the normal case; the variable is whether you need to bid priority to land in a congested slot. EVM chains price gas under the EIP-1559 model: a base fee that moves with demand block to block, plus a priority tip, multiplied by the gas the swap consumes. On Ethereum mainnet that can dominate a small swap; on the L2s and sidechains in the list it is usually a fraction of mainnet, but it is never a fixed number. We do not print a dollar figure for either, because any figure we printed would be wrong by the time you read it.

Execution price. On Solana, the quote gives you price impact and minimum received, and the atomic transaction means you either get at least the minimum or nothing happens. On EVM, the swap is simulated before signing so you see the exact outcome the router expects, and slippage is fixed at 1% — you cannot widen it to force a fill on a thin pair, which is a guardrail, not a limitation.

Approvals. Solana has no approval step for a swap. EVM requires an ERC-20 approval before a router can move your token, and that approval persists after the trade. A persistent approval is a standing permission; if the approved contract is ever compromised or you approved an unlimited amount to something you should not have, the exposure is still there months later.

Side by side, with sources

The "not measured" row is the point of this page. Anyone who tells you a swap costs a specific number of dollars on either chain is quoting a moment, not a rule. The Solana and Ethereum network pages carry the current endpoint status if you want to check the chain before you trade; they do not pretend to know your gas.

The exposure that outlives the trade

This is the cost that does not show up on any quote. A Solana swap ends when it settles: no permission remains, nothing can be pulled later. An EVM swap leaves an approval on the token contract that lets the router move that token again. The EVM swap feature page names this as the EVM-specific exposure. In practice it means two habits: approve only what you are swapping rather than an unlimited amount when the wallet gives you the choice, and periodically revoke approvals you no longer need. Neither habit costs much; both are things the Solana surface never asks of you.

Simulation versus atomicity

The two surfaces protect you in different ways and it is worth being precise about it. Solana's atomicity is a guarantee after the fact: the transaction cannot half-execute. EVM's simulation is a guarantee before the fact: you see the exact outcome the router expects, and if the simulation shows a fee-on-transfer token eating your output or a revert, you see it before you spend gas. Neither is strictly better. Atomicity does not stop you from signing a bad trade; simulation does not stop the chain state from changing between the simulation and the block. The fixed 1% EVM slippage is the bridge between them — a hard cap on how much the outcome can drift from what was simulated.

Who should swap on Solana

Swap on Solana if the asset lives there, obviously — but also if you value a clean end state with no standing approvals, if you trade small sizes where a gas-priced network fee would be a large share of the trade, and if you want price impact and minimum received spelled out before you sign. Check any Token-2022 mint's extensions first: the surface supports them, which means it is on you to know whether the mint carries a transfer fee or a permanent delegate.

Who should swap on an EVM chain

Swap on the EVM surface if the asset lives on one of the eight listed chains, if you want to see an exact simulated outcome before committing, and if you are disciplined about approvals. Prefer the L2s and sidechains in the list for smaller sizes, because mainnet gas can make a modest swap uneconomic in a busy block; but do not treat "cheap chain" as "no cleanup" — the approval persists on every one of them. If you are moving value from EVM to Solana rather than swapping within EVM, the EVM bridge is the surface for that, and it deliberately avoids the approval step altogether.

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