Bid-ask spread in crypto: what it is and what it costs
The bid-ask spread is the gap between the best buy and sell orders on a crypto exchange. It is a cost separate from fees and widens when liquidity is thin.
Vahe HakobyanEditor-in-chief
Updated Oct 6, 20263 min readFact-checked
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- Exchanges show the spread in order books for each pair.
- A wider spread means a higher immediate cost to trade.
- Market orders pay the spread; limit orders may not fill.
- The spread is separate from exchange fees and slippage.
- Thin liquidity and fast price moves widen spreads.
Buyers pay the ask, and sellers accept the bid. The difference is the spread. It changes as orders come and go.
What is a bid-ask spread?
The bid is the highest price a buyer will pay. The ask is the lowest price a seller will accept. The spread is the difference. Exchanges show this gap in order books for every trading pair.
What makes crypto spreads wider?
A wider spread means a higher immediate cost to trade. When you buy at the ask and sell at the bid, you lose the spread.
- Thin liquidity widens the spread when few orders sit near the price.
- Fast price moves can widen the spread as sellers pull orders.
- Less popular pairs usually have wider spreads than major pairs.
- Volatile moments push the spread wider as demand for liquidity rises.
How do orders interact with the spread?
A market order takes the best price right away and pays the spread. A limit order lets you name your price, but it may never fill. If you place a buy limit below the ask or a sell limit above the bid, you wait and may never get filled.
How is it different from other costs?
Your total cost to trade crypto has more than one part. The spread, exchange fees, and slippage are three.
Frequently asked questions
There is no fixed normal. It depends on the coin, the exchange, and market conditions. Popular pairs usually have tighter spreads.
Each exchange has its own order book, traders, and liquidity. Volume and competition vary, so spreads differ.
Yes. You can post a buy order above the current bid or a sell order below the current ask. It may not execute unless the market reaches your price.
