Nolus keeps its fees simple and easy to check before you commit to anything. This article covers every cost you can run into: interest on a leverage position, the spread on the swaps the protocol runs for you, and the network fees charged by the chains involved.
Interest on Margin Leverage Positions
When you open a leverage position, the interest rate is fixed at the moment the contract starts. It does not float with the market afterwards.
That interest splits into two parts:
Loan interest, which goes to the lenders who supplied the borrowed asset.
Margin (protocol) interest, which is the protocol's own revenue. It goes to the protocol treasury.
Nolus charges no additional fee on top of that interest for opening, holding, or closing a position.
Swap Spread
Swap is not available in the app in this release, so there is no swap of your own to pay a spread on. Spread still matters where the protocol swaps for you. As on any DeFi platform, the price achieved can differ slightly from the quoted price. The gap comes from how deep the liquidity is in the pool being used and how large the swap is relative to that pool. Larger swaps in thinner pools move the price more.
The swaps the protocol runs for you when a position opens, repays, closes or is liquidated have a floor: each step carries a minimum acceptable result, and a step that cannot meet it waits for a better price rather than filling at a bad one.
Network Fees
Every transaction on Nolus costs a small gas fee, well below what the same action would cost on Ethereum. That gas can be paid in NLS or in several of the other assets Nolus supports, so you do not need to hold NLS to use the app. Part of what the network collects flows back to NLS holders as staking rewards, so the fees you pay help fund the ecosystem rather than disappearing.
Transactions you sign on Solana carry a Solana network fee too, paid in SOL from your own wallet. Funding your Nolus account is one of them, and the app checks first: if your SOL is low you will see "Add SOL to your Solana wallet to cover the network fee". Keep a little aside for it.
Two Solana costs are not yours: the one-time setup the first time you hold a given token there is covered by the protocol, and assets arriving from Nolus into your Solana wallet cost you nothing.
Transaction Tax
40% of each gas fee is routed automatically to a decentralized treasury. The treasury grows with network activity, and NLS stakers decide how the accumulated funds are spent by proposing and voting on their use.