For a fixed-input swap, compare the quote, minimum output and total cost. Tolerance is neither a certain fee nor a security guarantee. Do not increase it without understanding why execution failed.
Floor for fixed input
Cap for fixed output
Validity limit
Read the asset and route
Check network, both token contract addresses, route and amount. Identical symbols do not establish identical assets. Multiple pools can add costs and dependencies; the quote should cover the whole route.
Calculate an explicit limit
Hypothetical example: a quote of 1,000 units and 0.5% tolerance gives a simplified minimum of 995 units. Wallet rounding and router rules can differ. Always check the actual signed value rather than the displayed percentage alone.
Separate quote, threshold and fees
Your order’s price impact may already be included in the quote. Tolerance permits additional movement without always being consumed. Network fees, preliminary approvals and token charges differ; a failed transaction may still use gas.
Handle failure or delay
Check whether price, deadline, balance, permission or contract caused the problem. Refreshing the quote may suffice. A wide tolerance permits unfavorable execution and some MEV scenarios. Inspect status before submitting another swap.
Check parameters
| Parameter | Purpose | Limit |
|---|---|---|
| Minimum output | Floor for fixed input | Not a guaranteed price |
| Maximum input | Cap for fixed output | Different from minimum output |
| Deadline | Validity limit | Not an inclusion time |
| Network fees | Processing cost | Possible even on failure |
Calculate minimum output
Frequently asked questions
Does 1% tolerance mean losing 1%?
No. It permits unfavorable movement up to the defined limit; execution can be better.
Can tolerance be zero?
A very strict limit may cause failure as the quote changes. No universal setting fits every asset.
Does minimum output protect against malicious tokens?
No. Check contracts, permissions, restrictions and the entire route separately.
Verifiable sources
Independent educational content reviewed against primary documentation. No personalized recommendation or promise of returns. Updated October 6, 2026
