Fixed Rate vs Floating Rate Crypto Swaps
Understand the difference between fixed and floating rate crypto exchanges, and how to choose the right model for your swap.
When swapping cryptocurrency you'll encounter two pricing models: fixed rate and floating rate. Understanding the difference can save you money — or give you peace of mind when markets are volatile.
What Is a Floating Rate Swap?
A floating rate swap finalizes the exchange rate at the moment your deposit is confirmed on-chain, not at quote time. Crypto markets move fast, so the final amount you receive can differ from the initial estimate.
Pros:
- Lower fees — you're not paying a premium for rate guarantees
- No expiry pressure; the swap processes whenever your deposit arrives
Cons:
- Final output amount is unpredictable in volatile markets
- Can be meaningfully worse than the quoted amount during sharp price moves
What Is a Fixed Rate Swap?
A fixed rate swap locks in the rate shown at quote time. The exchange commits to delivering the exact amount quoted, regardless of market movement during processing. The rate guarantee typically holds for a 30-minute window.
Pros:
- Predictable output — ideal for accounting, large amounts, or budget-sensitive transfers
- No surprises if the market swings mid-swap
Cons:
- Slightly higher fees to compensate for rate risk borne by the exchange
- You must submit your deposit before the rate window expires
Side-by-Side Comparison
| Scenario | Recommended |
|---|---|
| Swapping a large amount | Fixed rate |
| Speed matters most | Floating rate |
| Volatile market conditions | Fixed rate |
| Small or routine swaps | Floating rate |
| Sending to a merchant with exact invoice | Fixed rate |
How to Decide
The key question is: does the output amount matter precisely?
If you're sending to a friend, converting savings, or paying an invoice in crypto, use a fixed rate. If you're moving funds between your own wallets and don't mind a slight variation, floating rate is cheaper.
Tip: Watch the Countdown
On Zest, fixed-rate quotes display a countdown timer. Once it expires, the rate refreshes automatically. If you're ready to proceed, submit your deposit address before the timer hits zero — the rate is only guaranteed while the countdown is active.