Fixed vs Floating Rate Crypto Swaps: How Each Works and Which to Choose

When you swap one coin for another, you usually choose between two pricing modes. A fixed rate locks the amount you will receive before you send anything, while a floating rate sets your final amount at the moment your deposit is confirmed. The fixed vs floating rate crypto decision comes down to one trade-off: certainty now, or the market price later.

Neither option is always better. Below you will see how each is priced, when to pick which, what breaks a fixed quote, and a worked example.

What is a floating rate swap?

A floating rate swap gives you an estimate when you create the order. The amount you actually receive is calculated when your deposit is confirmed on the blockchain, using the market rate at that moment.

Between creating the order and confirmation, prices keep moving. Your final payout can end up slightly higher or slightly lower than the first estimate shown on screen.

• Pro: no volatility buffer is built into the estimate, so in calm markets it can come out slightly higher than a fixed quote.
• Pro: there is no rate countdown to beat, so a slow wallet or a busy network does not cost you a locked rate.
• Con: you carry the price risk until the deposit confirms.

What is a fixed rate crypto exchange?

A fixed rate crypto exchange quotes you an exact receive amount up front. On BreezeSwap, the fixed rate locks the amount while the countdown runs, provided you send exactly the quoted amount on the quoted network.

Think of it as a rate lock for crypto: whatever the market does while your transaction confirms, the payout stays at the quoted figure, as long as you meet the conditions.

• Pro: you know exactly what lands in your wallet before you send.
• Pro: you are protected from sharp moves during slow confirmations.
• Con: the quote usually includes a small volatility premium, so it can be slightly lower than a floating estimate when markets are quiet.
• Con: the lock is conditional. Timing, amount and network all have to match.

How each rate is priced

Understanding why the two quotes differ makes the choice easier.

Floating: the rate at confirmation

With a floating rate, the liquidity partner converts your coins at the prevailing market rate once your deposit is confirmed. Because nobody is taking on price risk for you in the meantime, there is no need to add a buffer. You receive what the market pays at that point, with fees already built into the rate.

Fixed: the rate plus a volatility premium

With a fixed rate, the partner commits to a payout before your coins arrive. If the price moves against them during the countdown, they absorb the loss. To cover that risk, the quote typically includes a volatility premium.

In short, you pay a small premium for certainty. In a calm market it often costs you a little compared with floating; in a fast-moving market it can be worth it.

Fees are the same either way

The rate mode does not change the fee structure. Our service fee is up to 0.4% and already included in the rate; there are no additional fees.

The payout network fee is included in the estimate, and your own wallet's network fee for the deposit is extra. See the fee breakdown for details.

Fixed vs floating rate crypto: when to choose which

A few situations point clearly one way or the other.

Choose a fixed rate when

• The market is volatile. If prices are swinging hard, a rate lock removes the guesswork from your payout.
• The amount is large. A 1–2% move on a small swap is minor. On a large one, it can be a meaningful sum, so certainty has more value.
• Your deposit chain is slow. Bitcoin blocks arrive roughly every ten minutes on average, and a deposit may need more than one confirmation. That leaves time for the price to move, and a fixed rate shields you from that window.
• You need an exact amount. If you are paying someone or topping up to a specific balance, knowing the output matters more than a marginally higher estimate.

Choose a floating rate when

• The market is calm. Without the volatility premium, a floating estimate can come out slightly higher.
• The amount is small. Short-term price moves have little impact in absolute terms.
• You cannot control deposit timing precisely. If you are sending from an exchange account with withdrawal delays, or you are unsure of the exact amount after fees, floating avoids the risk of breaking a lock.
• Your deposit chain confirms quickly. A shorter confirmation window means less time for the price to drift.

Our help page on floating vs fixed rate summarizes these rules in a quick reference.

What breaks a fixed quote

A fixed rate is a conditional lock. If one of the conditions is not met, the lock no longer applies. These are the three usual causes.

1. Late deposit. If your transaction is not detected before the countdown ends, the quote expires and the lock no longer applies. Broadcasting with a very low network fee is a common cause, because the transaction can sit unconfirmed.
2. A different amount. Sending more or less than quoted breaks the lock. This often happens when an exchange withdrawal deducts its own fee, so fewer coins arrive than you intended. Always check that the amount received matches the quote, not just the amount you typed.
3. The wrong network. The quote is tied to a specific network, for example USDT on TRC-20 rather than ERC-20. A deposit on a different network is not a valid payment for that order and creates a bigger problem than a lost rate: recovery depends on the liquidity partner, usually takes 14–30 business days, can involve a fee of up to $50 plus network fees, and some errors are unrecoverable.

If something goes wrong, our guide to order statuses explains what each status means and what to do next.

Practical checks before you send on a fixed rate

• Copy the exact amount from the order page, and add your wallet's network fee on top rather than subtracting it.
• Set a normal or higher network fee so the transaction confirms promptly.
• Confirm the network label in your wallet matches the network shown on the order.
• Send in a single transaction. Split deposits usually break the quote.

Worked example: fixed vs floating on a BTC to ETH swap

Illustration only. The numbers below are made-up round figures chosen to show the mechanics. They are not real prices, rates or premiums, and they do not predict how any market will move.

Say you want to swap 1 BTC for ETH on the BTC to ETH swap page. You see two options:

• Floating estimate: 30.00 ETH
• Fixed quote: 29.85 ETH (the gap represents the volatility premium in this example)

You send 1 BTC, and it takes a while to confirm. Here are three ways the market could move in the meantime:

1. Price stays flat. Floating pays about 30.00 ETH. Fixed pays 29.85 ETH. Floating comes out ahead by 0.15 ETH.
2. BTC rises 2% against ETH. Floating pays about 30.60 ETH. Fixed still pays 29.85 ETH. Floating comes out ahead by 0.75 ETH.
3. BTC falls 2% against ETH. Floating pays about 29.40 ETH. Fixed still pays 29.85 ETH. Fixed comes out ahead by 0.45 ETH.

The takeaway: floating spreads your result across a range, while fixed gives one known number. You give up a little in the flat case to remove the downside in the falling case.

Now add one twist. Suppose your wallet deducts its network fee from the 1 BTC, so only 0.9998 BTC arrives.

Under the fixed rate, that is a different amount from the quote, so the lock no longer holds. This is why checking the received amount matters so much.

Floating rate swap timing and confirmations

Rate mode does not change how long an exchange takes. Most exchanges take 5–30 minutes, with the deposit confirmation usually being the longest step. Bitcoin's own documentation explains that transactions accumulate confirmations over time and become harder to reverse with each one, which is why services wait for them before paying out.

What changes is who carries the price risk during that wait. With floating, you do. With fixed, the liquidity partner does, and the premium is what you pay for that.

FAQ

Is a fixed rate always more expensive than a floating rate?

Not always in outcome. The fixed quote usually includes a volatility premium, so it is often slightly lower than the floating estimate at the moment you compare them. If the market moves against you before confirmation, the fixed rate can end up paying more.

What happens if I send the wrong amount on a fixed rate order?

The rate lock only applies if you send exactly the quoted amount. If a different amount arrives, the lock no longer holds and the next step depends on the case. Check your order status page, and see our refunds guide if you need your coins back.

Does a rate lock in crypto cover network fees?

The payout network fee is included in the estimate for both fixed and floating orders. Your own wallet's fee for sending the deposit is separate and is not part of the quote.

Which is better for Bitcoin deposits?

Because Bitcoin blocks come roughly every ten minutes on average, a fixed rate is often a sensible choice for larger BTC swaps when the market is moving. For small amounts in calm conditions, floating usually works well.

Can I switch from floating to fixed after creating an order?

The rate mode is set when you create the order. If you want the other option, create a new order before sending any funds.

Fixed rates trade a small premium for certainty, while floating rates give you the market price at confirmation with no buffer. Pick fixed for volatile markets, large amounts and slow chains, and floating for small swaps in calm conditions. When you are ready, open the BTC to ETH swap page and compare both quotes side by side before you send.