What happens if my swap amount goes over the quoted limit

07 September 2026

The swap will not execute. If you attempt to send an amount that exceeds the quoted limit, the platform will reject the transaction. You will receive your funds back, minus network fees already spent.

This happens because the limit is not arbitrary. It is a direct reflection of the liquidity available at the price range you were quoted. When you request a swap, the platform checks the order books and liquidity pools to find a route that can fill your order at the displayed rate. That rate is only guaranteed for a specific amount. Exceeding that amount means the platform cannot fill the entire order at the same price without moving the market against itself.

Imagine a liquidity pool that holds 10 Bitcoin and 500,000 USDT. The quoted rate for a 1 BTC swap might be 50,000 USDT. If you try to swap 2 BTC, the platform would need to take liquidity from deeper levels in the order book, where the price is worse. The quoted rate assumed you would only drain the most favorable 1 BTC of depth. The second Bitcoin would come from less favorable orders, producing a lower effective rate. Rather than execute a partial fill at a worse rate than you agreed to, the platform simply refuses the over-limit order.

Some platforms offer a "fill or kill" option. This means the entire order must be filled at the quoted rate, or it is canceled. The limit you see is the maximum size the platform can fill at that exact rate. If you exceed it, the kill condition triggers.

The practical consequence: you lose the network fee sent with the transaction. That fee pays miners or validators to process the failed transaction. It is not refunded. On Ethereum-based chains, this can be significant. On Bitcoin, it is smaller but still real.

If you want to swap a larger amount, you must request a new quote for that larger size. The new quote will show a worse rate, because the larger size will consume more of the available liquidity and push the price. This is not a trick. It is the market working.

The sibling page "When your swap is big enough to move the rate" explains exactly how the rate changes as size increases. That page is the natural next read if you are trying to understand the relationship between amount and price.

A common mistake is to assume the limit is a safety cap, like a withdrawal limit. It is not. It is a liquidity boundary. Crossing it does not trigger a warning or a partial fill. It triggers a rejection.

If you are testing a route before committing a serious sum, you should request a quote for the exact amount you intend to swap. Do not assume you can scale up a small quote. The rate for 0.1 BTC is not the rate for 1 BTC. The limit you see is the maximum the platform can safely fill at the rate shown. Treat it as a hard boundary.

The only way to know what rate you will get for a larger amount is to request a quote for that larger amount. The platform will then search for liquidity at that size and return a new rate and a new limit. That new limit will be the maximum for that new rate.

If you need to move a very large amount, you may need to split it across multiple routes or platforms. The page "Can I break a big swap into smaller chunks to get a better price" covers why that strategy often fails. But the immediate answer to the question is simple: the swap fails, you lose the network fee, and you must request a new quote for the larger amount.

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