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Crypto exchange spread: what it is and what it costs

A crypto exchange spread is the gap between the best bid and best ask, an immediate trading cost that is separate from exchange fees. It varies by market.

Vahe HakobyanEditor-in-chief Updated Oct 6, 20263 min readFact-checked

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What the spread is Why spreads get wider How orders meet the spread Spread vs slippage and charges FAQ

Short answer

A crypto exchange spread is the gap between the best bid and the best ask on an order book. The best bid is the highest price a buyer offers. The best ask is the lowest price a seller asks. The spread is an immediate trading cost, separate from any exchange fee.

The order book collects bids and asks from many traders, and the two sides meet at different prices.

What the spread is

An order book lists bids and asks. The spread is the distance between the highest bid and the lowest ask. It is a cost of buying or selling right away, even when the exchange shows no separate trading charge.

The two sides of a quote
Criterion	Best bid	Best ask
Price	Highest buyer offer	Lowest seller ask
Who posts	Buyer	Seller
What it shows	Demand at that price	Supply at that price

Why spreads get wider

Spreads are not fixed. They widen when a coin trades thinly, when prices move quickly, or when few orders sit near the top of the book. They also vary by exchange, by trading pair, and by order book depth.

Thin trading keeps buyers and sellers apart.
Volatile prices make traders quote wider gaps.
A quiet trading pair usually has a wider spread.
Each exchange has its own users and liquidity.
A shallow order book pushes the best prices apart.

How orders meet the spread

A market order asks to trade now. It takes the best available price on the other side, so it crosses the spread. A limit order names a price. It may wait in the book and may not fill, and if it fills it can avoid crossing the spread.

Spread vs slippage and charges

Slippage is not the same as the spread. Slippage is the difference between the price you expected and the price your order gets after it executes. It often appears when a large order eats through several price levels.

Spread and slippage compared
Criterion	Spread	Slippage
When it appears	Before the trade, in the quote	After the trade, in the fill
What it measures	Gap between best bid and best ask	Change from expected to filled price
Relation to fees	Built into the quote, not a charge	Can add to the cost of a market order

Frequently asked questions

No, the spread is built into the quote while an exchange charge is an explicit fee. A market maker exchange usually earns the spread; a matching platform charges fees instead.

Liquidity and volatility change through the day. When fewer orders sit near the best prices or prices move fast, the spread usually widens.

You pay it when your order crosses the spread, as a market order usually does. A limit order that rests in the book may not pay it, but it may not fill.

Open the order book and subtract the best bid from the best ask. Many exchange order forms also show the current spread before you confirm.

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Written byVahe HakobyanVahe Hakobyan is the editor-in-chief of World-Crypt. He covers bitcoin, markets and regulation, and leads the newsroom that fact-checks every story before it goes live.