fomo charges a fee on each trade. The rate depends on which network the token is on.
Trading fees by network
On Solana, the fee depends on which route is available when your trade goes through, and it is a percentage with a minimum rather than a flat charge.
On the lowest-fee route the fee is 0.10 USDC on trades under 5 USDC, 2% from 5 to 47.50 USDC, 0.95 USDC from 47.50 to 190 USDC, and 0.50% from 190 USDC up. On the other routes the fee is 0.50% with a 0.95 USDC minimum.
Which route is available changes from trade to trade, so the same size trade can carry a different fee at different moments.
On every other network (Base, BNB Chain, Monad, Robinhood Chain, Ethereum, and Arc), the fee is 0.50% per trade plus network fees.
Lowered fees and discounts
Select major tokens have a lowered fee of 0.05% per trade. You will see this indicated on the token's page in the app. On these tokens a minimum fee applies on smaller trades to cover blockchain costs.
Users who sign up with a referral code receive a 10% discount on the standard trading fee, bringing the 0.50% rate to 0.45%. The discount applies to that percentage rate only: the 0.05% rate on lowered-fee tokens and the fixed amounts on small Solana trades stay the same.
Network fees
On Solana, fomo covers the network gas, priority fees, and token rent, so you don't pay them separately. Token rent is the one-time cost of opening a token account the first time you buy a token.
On every other network, network fees are paid by you on top of the 0.50% fomo fee.
In the app, expand the details on the buy or sell screen to see the Network fee row. On the web app the row appears under the amount when the fee is a meaningful part of the trade; a small network fee sits inside the total shown.
Ethereum carries higher network costs than the other networks and takes longer to process. The fee is set by the Ethereum network and paid to it, not to fomo, and it applies to sells as well as buys.
The figure shown is inside the total you enter rather than added on top. If you cancel at the prompt, nothing is submitted and nothing is charged.
Reading the fee summary
If your fee summary shows two fee lines, one is fomo's fee and the other is the network fee. The network fee goes to the network, not to fomo, and it shows even when fomo's fee is zero.
The summary shows fomo's fee as the rate or the minimum that applies rather than a total, so if the screen looks different from what you remember, the amount charged is the same and only the display changed.
When the network fee is a large share of a trade, the app asks you to confirm before the trade goes through.
In the app a High network fee sheet appears after you submit, and you tick I understand to continue. On the web app a High network fee box appears in the trade panel, and the Buy or Sell button stays off until you tick it.
Before confirming a trade, the app shows an estimated quote with the expected value of your trade based on current market liquidity. If the price impact is significant, the estimate will reflect that so you can decide before confirming.
Fees set by the token itself
Some tokens have fees built into their smart contracts that apply when the token is bought or sold. For example, tokens launched through certain launchpads may include a small contract-level fee. These are set by the token's creators, not by fomo, and are separate from fomo's trading fee.
The app shows a token's tax before you trade. In the app it appears as a Token tax row in the trade details, and when the tax is high it replaces the fee line as "X% token tax". The note beside it reads "This tax is set by the token's creator. It's not a fomo fee."