When you buy Bitcoin with a market order, you rarely pay exactly the price the app showed you beforehand. The difference is called slippage, and it does not come from a fee but from the depth of the order book: your order works its way up through the sell offers on hand until it is filled. How expensive that gets depends on how much capital sits right next to the current price.
We measured this ourselves across five exchanges on September 14, 2026, in three time windows between 15:51 and 15:53 UTC. The headline result: for a purchase of 100,000 euros the markup in the third window ranged from 10.50 euros to 329.86 euros, depending on which exchange you pick. That is a factor of 31 for exactly the same action in the same minute.
This analysis was compiled by cryptoticker.io on September 14, 2026.
Slippage on a Bitcoin order: what the term means precisely
Slippage is the gap between the price you see when you submit the order and the average price at which it is actually executed. It is not a fee and never appears on a statement as its own line item. It sits inside the execution price.
The mechanism behind it is an order book. An order book is the price-sorted lis...
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