A built-in wallet swap can add a service fee to the execution costs of its providers. That fee can also be waived for specific pairs. Comparing wallets with one permanent percentage per brand hides these exceptions.
The following official schedules were checked September 24, 2026. They describe the wallet service layer, not a tested ranking of net output.
| Interface | Published service-fee treatment | Important qualification |
|---|---|---|
| MetaMask Swaps | 0.875% | Network cost is a separate cost component |
| Rabby Swap | 0.25%, included in quote | Eligible same-chain groups have the Rabby fee waived |
| Phantom | 0.85% on most swaps | Specified exceptions; bridge fee presentation requires inspection |
| Coinbase Wallet/Base DEX flow | Up to 1% | Aggregator fees may also be reflected in output |
| Uniswap Labs wallet/interface | 0% interface fee | Pool and network costs remain |
See the official schedules for MetaMask, Rabby, Phantom, Coinbase and Uniswap Labs.
Use the percentages without double-counting
If a quote says you receive a net amount, do not subtract the displayed service fee again. Add only costs that the quote excludes and that you must separately pay. Likewise, a gasless quote may recover gas through output rather than through a visible native-token payment.
For an illustrative 1,000-unit notional, a 0.25% service fee corresponds to 2.5 units before considering the fee’s actual denomination. That arithmetic does not predict which wallet delivers more tokens: routes and liquidity can differ.
Decide whether convenience earns its cost
Compare the embedded quote with an external application using the same account, network, token contracts and amount. Retain the receiving minimum and any extra approval requirement. A lower service percentage is useful evidence, but the decision concerns the complete trade and workflow. It should not require moving keys to another wallet merely to view an alternative quote.
Sources & verification (6)
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- User guide: swaps
MetaMask Swaps supports BNB Chain, lists a 0.875% fee, documents selected gasless flows and bridge providers, and defines its support boundary.
https://support.metamask.io/trade/swap/user-guide-swaps/ - How to use Rabby Swap
Rabby obtains aggregator quotes and includes its 0.25% service fee in the quote. The guide discusses limited approvals and quote or chain availability.
https://support.rabby.io/en/articles/14134156-how-to-use-rabby-swap - 0% Swap fee token pairs
The July 21, 2026 exemption list waives Rabby fees for eligible tokens in the same group on the same chain, including specified BNB stablecoins.
https://support.rabby.io/en/articles/15956135-0-swap-fee-token-pairs - Swap crypto in Phantom
A 0.85% fee applies to most swaps, with documented exceptions. The guide covers mobile Cash defaults, cross-chain fee presentation, tracking and support escalation.
https://help.phantom.com/articles/5985106844435 - Swap using a DEX
The wallet DEX flow lists a Base fee of up to 1%, possible underlying aggregator fees and separate network costs. Ledger-connected extension accounts require device signing.
https://help.coinbase.com/en/wallet/getting-started/dex-swap - What are Uniswap Labs fees?
Uniswap Labs ended its interface fee on December 27, 2025. Interface fees remain distinct from protocol and pool costs.
https://support.uniswap.org/hc/en-us/articles/20131678274957-What-are-Uniswap-Labs-fees