Fixed vs Floating Rate: Which Should You Choose?

When swapping crypto on any exchange — KYC or not — you'll encounter two types of rates: fixed and floating (also called variable). Understanding the difference can save you money and prevent surprises.

What is a fixed rate?

A fixed rate locks in your exchange rate the moment you create the swap order. If the rate shows 1 BTC = 340 XMR when you create the order, you'll receive exactly 340 XMR (minus fees) regardless of what happens to the market during the swap.

Fixed rates provide certainty. You know exactly what you'll receive before you send your crypto. This is especially valuable during high volatility — if the market drops 5% while your transaction confirms, you're protected.

The trade-off: Fixed rates are typically 1-3% worse than floating rates. The exchange charges this premium because they're absorbing the volatility risk. They have to guarantee your rate even if the market moves against them.

What is a floating rate?

A floating rate adjusts until your deposit confirms on the blockchain. The rate you see when creating the order is an estimate — the actual rate is calculated when your transaction receives enough confirmations.

If the market moves in your favor during confirmation, you get more. If it moves against you, you get less.

The trade-off: Floating rates are usually better (you get more crypto), but you don't know the exact amount until the swap completes. In a flash crash, you could receive significantly less than expected.

When to use fixed rate

Large swaps. If you're swapping a significant amount, the certainty of a fixed rate is worth the premium. A 2% difference on a large swap is real money — but a 10% market drop is worse.

High volatility. During major market events, price can swing 5-15% in minutes. Fixed rates protect you from these swings.

Exact amounts needed. If you need exactly X amount of a coin for a payment or purchase, fixed rate guarantees you'll get it.

When to use floating rate

Small to medium swaps. For everyday swaps, the 1-3% you save with floating rate adds up over time. The risk of a major price move during a 10-minute confirmation window is small.

Stable or sideways markets. When prices aren't moving much, floating rates give you the best deal with minimal risk.

Stablecoin pairs. Swapping USDT to USDC? Both are pegged to $1. There's essentially zero volatility risk, so floating rate is almost always better.

Real-world comparison

Let's say you're swapping 0.1 BTC to XMR. At the moment of the swap:

Fixed rate offer: 0.1 BTC → 33.50 XMR (guaranteed)
Floating rate offer: 0.1 BTC → ~34.20 XMR (estimated)

The floating rate is ~2% better. In a normal market, you'd receive somewhere between 33.80 and 34.60 XMR depending on price movement during confirmation. In most cases, you'd come out ahead with floating rate.

But if Bitcoin drops 5% during your confirmation time, the floating rate might deliver only 32.50 XMR — less than the fixed rate would have guaranteed.

Pro tip: Compare both

On nokycswaps.com, results show the rate type for each exchange. Some exchanges offer both fixed and floating — compare them side by side. If the fixed rate is only 0.5% worse than floating, the certainty might be worth it. If it's 3% worse, floating is likely the better choice.

Summary

Fixed rate = certainty, slightly worse rate, protection from volatility
Floating rate = usually better rate, slight uncertainty, small risk during volatile markets

For most everyday swaps in a normal market: floating rate wins. For large swaps or volatile markets: fixed rate is safer.