> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mobula.io/llms.txt
> Use this file to discover all available pages before exploring further.
# Perp Fees
> Fee structures for each perp DEX integrated on Mobula — Lighter and Gains Network — with numerical examples.
## Overview
Mobula routes perp orders to two DEXes today: **Lighter** and **Gains Network**. Each one has its own fee model — values below are taken directly from the protocols' public fee documentation.
Orderbook DEX. Free for Standard accounts; staking-tier maker/taker fees for Premium.
Leveraged trading. Opening + closing fees on leveraged size, plus spread and borrowing fees.
***
## Lighter
Lighter is an on-chain orderbook. Fees depend on **account type** and, for Premium, on the amount of **LIT staked**.
### Standard Account (default)
**0% maker / 0% taker.** All markets, perpetuals and spot. No fee at all.
| | Maker | Taker | Taker latency | Maker latency | Cancel latency |
| - | - | - | - | - | - |
| **Standard** | 0% | 0% | 300 ms | 200 ms | 200 ms |
### Premium Account (opt-in)
Premium unlocks lower latency and better cancel/post-only behavior, in exchange for a fee. Fees scale down with staked LIT:
| Staked LIT | Maker | Taker | Taker latency |
| - | - | - | - |
| 0 | 0.0040% | 0.0280% | 200 ms |
| 1,000 | 0.0039% | 0.0273% | 195 ms |
| 3,000 | 0.0038% | 0.0266% | 190 ms |
| 10,000 | 0.0036% | 0.0252% | 180 ms |
| 30,000 | 0.0034% | 0.0238% | 170 ms |
| 100,000 | 0.0032% | 0.0224% | 160 ms |
| 300,000 | 0.0030% | 0.0210% | 150 ms |
| 500,000 | 0.0028% | 0.0196% | 140 ms |
Staking discount is applied at the **L1 address level** — main account and sub-accounts share the same tier based on combined stake.
### Example — Lighter Premium, 0 staked LIT
Open a \$10,000 notional position as a market taker:
```
Notional = $10,000
Taker fee = 0.028%
Fee paid = $10,000 × 0.00028 = $2.80
```
Same trade as a maker (resting limit order):
```
Notional = $10,000
Maker fee = 0.004%
Fee paid = $10,000 × 0.00004 = $0.40
```
Same trade on a **Standard account**: **\$0**.
Standard is free, so it's the default for most flow. Premium is opt-in for traders who need lower latency and the [volume quota program](https://apidocs.lighter.xyz/docs/volume-quota-program), and pay the maker/taker fee in exchange.
[Full Lighter fee documentation →](https://docs.lighter.xyz/trading/trading-fees)
***
## Gains Network
Gains charges fees on the **leveraged position size** (collateral × leverage), not on collateral. Four components on every trade:
1. **Opening fee** — taken when the trade opens
2. **Spread** — applied to the price (fixed + dynamic / price impact)
3. **Borrowing fee** — accrued per block while the trade is open
4. **Closing fee** — taken when the trade closes
### Opening + Closing fees by asset class
| Asset class | Opening | Closing |
| - | - | - |
| Crypto (core: BTC, ETH) | 0.05% | 0.05% |
| Crypto (non-core) | 0.06% | 0.06% |
| Forex (major) | 0.012% | 0.012% |
| Forex (minor) | 0.016% | 0.016% |
| Forex (exotic) | 0.02% | 0.02% |
| Commodities Tier 1 (Gold) | 0.05% | 0.05% |
| Commodities Tier 2 (Silver, Oil, Pd, Pt) | 0.08% | 0.08% |
| Stocks | 0.07% | 0.07% |
| Indices | 0.05% | 0.05% |
### Spread
* **BTC, ETH:** 0% fixed spread (only dynamic spread applies)
* **Other crypto:** dynamic spread only, function of open interest and 1% market depth
* **Forex / Commodities:** fixed spread per pair (0.01% major, 0.04% tier 2 commodities, etc.)
Dynamic spread formula:
```
dynamic_spread (%) = (OI_side + new_position_size / 2) / depth_1pct
```
### Borrowing fee
Charged per block on total position size, scales with how lopsided the pair's open interest is:
```
feePerBlock = baseFeePerBlock × (effectiveOi / maxOi) ^ exponent
```
Pairs with very long-skewed (or short-skewed) OI charge more on the dominant side. Balanced books charge less.
### Example — Long ETH/USD on Gains
Setup:
```
Collateral = 250 USDC
Leverage = 10x
Position size = 2,500 USDC
Asset = ETH (core crypto, 0.05% open / 0.05% close)
Entry price = 3,003.19 (assume 0% fixed spread for ETH)
```
**Opening fee:**
```
2,500 × 0.05% = 1.25 USDC
Net collateral after fee = 248.75 USDC
Net position size = 2,487.50 USDC
```
**Dynamic spread** (assuming 100k long OI and 8M depth):
```
dyn_spread = (100,000 + 2,487.50 / 2) / 8,000,000 = 0.0126%
opening price = 3,003.19 × (1 + 0.000126) ≈ 3,003.57
```
**Trade goes up 1%, close at 3,033.6:**
```
PnL gross = 2,487.50 × 1% = 24.88 USDC
Closing fee = 2,487.50 × 0.05% = 1.24 USDC
Borrowing = ~0.5 USDC (depends on duration / OI imbalance)
PnL net = 24.88 - 1.24 - 0.5 = 23.14 USDC
Final out = 248.75 + 23.14 = 271.89 USDC
```
So on a 250 USDC × 10x trade closed at +1%, the trader pockets **21.89 USDC** out of the \~25 USDC raw move — total fees (open + close + borrowing) ≈ **3 USDC**, or **\~12% of gross PnL** at this size.
Liquidation prices on Gains tighten over time as borrowing fees accrue. See the [Gains liquidation thresholds tables](https://docs.gains.trade/gtrade-leveraged-trading/fees-and-spread#liquidation-thresholds) for exact thresholds per asset class and leverage.
[Full Gains Network fee documentation →](https://docs.gains.trade/gtrade-leveraged-trading/fees-and-spread)
***
## Quick comparison
| | Lighter (Standard) | Lighter (Premium, 0 LIT) | Gains (core crypto) |
| - | - | - | - |
| Open fee | 0% | 0.028% taker / 0.004% maker | 0.05% |
| Close fee | 0% | 0.028% taker / 0.004% maker | 0.05% |
| Spread | 0 (orderbook) | 0 (orderbook) | Fixed (per asset class) + dynamic |
| Borrowing | n/a | n/a | per-block, OI-skew-based |
Use [`/2/perp/quote`](/exec/perps/perp-quote) to preview fees and slippage on either DEX before committing the trade — it returns a fee breakdown for the venue your order would route to. Pair it with the [Perp DEX Status](/data/perps/perp-dex-status) endpoint to confirm the upstream is healthy before routing.
***
## Related
Supported exchanges and capability map.
Preview fills, fees and venue routing.
Lighter / Gains uptime, probe results and maintenance windows.
Build → execute flow against Lighter and Gains.
This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.