# Set your slippage (/users/guides/set-slippage) The slippage allowance is the one control that changes the number written into your transaction. Everything else on the quote panel is read only. ## Where it is [#where-it-is] On the swap screen, under **Pair and amount**, the field is **Slippage allowance, basis points**. It starts at 50. A basis point is one hundredth of a percent, so 50 basis points is 0.50 percent. The field takes a whole number from 0 up to 9999. Anything else is refused with the reason on screen. ## What it does [#what-it-does] Zerochord takes the quoted output, deducts your allowance, and writes the result into the transaction as **Minimum output enforced on chain**. ``` minimum output = quoted output - (quoted output x allowance / 10 000) ``` The deduction is rounded up, so the minimum that goes on chain is never looser than the allowance implies. That minimum is what the chain holds the swap to. Deliver at least that much and the swap settles. Fall below it and the swap fails. ## Choosing a value [#choosing-a-value] A **smaller** allowance is stricter. The minimum sits closer to the quoted output, so you either get close to the quote or you get nothing. A **larger** allowance is more permissive. The minimum sits further below the quoted output, so the swap survives a bigger move in the pool between quoting and settling, and it can fill further from the quote. Changing the field fetches a fresh quote, so the minimum you see always matches the value in the box. ## What it does not do [#what-it-does-not-do] The allowance does not affect the route, the price, or the fees. It only sets the floor. It also does not affect the network fee your wallet pays. ## Related [#related]