Uniswap Fees, Gas & Slippage — Complete Guide
Every cost you meet on Uniswap, explained in plain terms: liquidity-provider fee tiers, network gas, slippage and price impact — and how to pay less.
Liquidity-provider fee tiers
A small fee goes to liquidity providers on every swap. Uniswap v3 introduced multiple tiers so each pair can pick the one that fits its volatility.
0.01%
Ultra-stable pairs such as USDC/USDT where prices barely move.
0.05%
Large, highly correlated pairs like ETH/stablecoins.
0.30%
The standard tier for most pairs — and the flat rate on Uniswap v2.
1.00%
Exotic or volatile tokens that need to reward LPs for extra risk.
Gas costs by network
Gas is paid to the blockchain, not to Uniswap. Swapping on a Layer 2 is usually dramatically cheaper than Ethereum mainnet.
Tip: switch to a Layer 2
The same swap on Base, Arbitrum, Optimism or Unichain can cost a fraction of mainnet gas. Uniswap prompts your wallet to switch networks automatically.
Slippage and price impact
Slippage is the difference between the price you are quoted and the price your swap actually executes at. Price impact is how much your own trade moves the pool — larger trades on thin pools move the price more.
Stable / high-liquidity pairs
Set slippage to 0.1%–0.5%. Fills are predictable and a tight tolerance protects you.
Volatile / low-liquidity tokens
Use a higher tolerance so the swap doesn't fail — but watch the price-impact warning.
Reduce price impact
Split a large order into smaller swaps, or let UniswapX route across more liquidity.
Gas-free with UniswapX
Fillers cover on-chain costs and compete for your order, with built-in MEV protection.
Fees FAQ
How much does Uniswap charge per swap?
Uniswap charges a liquidity-provider fee per swap. On v3 it is one of four tiers — 0.01%, 0.05%, 0.30% or 1.00% — depending on the pool; v2 pools use a flat 0.30%. You also pay network gas, which varies by chain.
Why is my gas fee so high?
Gas is paid to the network, not to Uniswap, and depends on congestion and the chain. Ethereum mainnet is the most expensive; Layer 2s such as Base, Arbitrum, Optimism and Unichain are far cheaper.
What slippage tolerance should I set?
Use 0.1%–0.5% for stablecoin and high-liquidity pairs, and a higher tolerance for volatile or low-liquidity tokens. Too low and the swap may fail; too high and you risk a worse fill.
Can I swap without paying gas?
UniswapX can offer gas-free swaps: fillers cover the on-chain cost and compete to give you the best price, with built-in MEV protection.
Does the Uniswap app add an interface fee?
The Uniswap web app may apply a small interface fee on some swaps in addition to the pool's LP fee. The exact amount is always shown in the swap preview before you confirm.