A 10x leverage badge and a 0.05% fee line are the numbers most platforms put in front of you. Neither one is the real cost of holding a perp position. The actual cost structure is spread across several line items that only show up once you're actually in a trade — some visible on a fee schedule, some that only bite when the market moves against you.

Here's the full list.

The most visible cost: a fee charged when a position opens and again when it closes, usually a percentage of position size. This is the number platforms lead with, and it's real — but for a position held longer than a few minutes, it's typically a smaller piece of the total cost picture than holding fees and funding combined.

Positions that stay open accrue a fee over time, charged against position size for as long as the trade is live. A position held for a day costs meaningfully more in holding fees than one closed within the hour, independent of how the price moved. This cost scales with time, not with whether the trade was a good idea.

Perpetual contracts don't expire, so they use a funding rate to keep the contract price anchored to the underlying market. Depending on how open interest is split between longs and shorts at any given time, funding flows from one side to the other — sometimes in a trader's favor, sometimes against it. It isn't a fixed cost; it's a variable one that depends on how crowded a given side of the market is. See Funding Rates Explained for the full mechanics.

The price a trader expects when submitting an order isn't always the price the trade actually executes at. That gap — slippage — grows with position size, market volatility, and how stale the reference price is at the moment of execution. Reducing oracle staleness helps reduce pricing latency and stale pricing risk; a slower or thinner feed widens the gap instead. See What Is Slippage in DeFi? for the full breakdown, and Oracle Freshness Is Hidden Slippage for why the two are connected.

This is the cost most new traders underprice. Leverage doesn't just amplify gains — it sets a liquidation threshold that gets closer to the entry price as leverage increases. A liquidated position doesn't just lose money; it can lose most of the collateral posted to that position, at a moment the trader doesn't control. Understanding exactly where that threshold sits, and how it moves as fees accrue, matters more than the leverage number by itself. See How Liquidation Works for the exact math.

Collateral posted to an open position isn't available for anything else while the position is live — it can't be redeployed, staked, or used to open a different trade. That's not a fee charged by any protocol, but it's a real cost: capital tied up in one position is capital not compounding somewhere else.

None of these costs are hidden in the sense of being undisclosed — open/close fees, holding fees, and funding rates are all published, and slippage and liquidation thresholds are calculable before a trade is placed. They're "hidden" in the sense that a leverage multiplier and a headline fee percentage don't add them up for you. A position that looks cheap on the fee schedule can still be an expensive way to hold a view, once holding fees accrue and funding runs against the trader for long enough.

The practical takeaway isn't to avoid any of these costs — they're a normal part of how leveraged trading works — but to price a position by its full cost structure before opening it, not just by the number on the leverage slider.

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