The cost of entering a position is not the fee on the schedule. It is four separate costs: the bid-ask spread you cross, the slippage from filling against available depth, the trading fee the venue charges, and — for positions held across a settlement — the funding exchanged while you are in.
Each is small. Together they determine whether a strategy earning a thin spread is profitable, and a two-leg hedged position pays all of them on both legs, twice, because every position is opened and closed.
Four Costs, Not One
The spread. The gap between the best bid and the best offer. Buying at the offer and selling at the bid means paying it, and on a round trip you pay it twice. On deep markets in major assets the spread is narrow; on smaller contracts and during volatility it widens, often precisely when you need to transact.
Slippage. The difference between the price you expected and the price you received. It comes from filling against progressively worse levels in the order book, and it scales with order size relative to available depth.
Trading fees. What the venue charges, and the part most people look at. Crucially, it is not a single number — it depends on how you trade, which is the subject of the next section.
Funding. For positions held across a settlement, the payment exchanged between longs and shorts. Covered in how the funding fee works; included here because it belongs in any honest accounting of what a position costs to hold.
Maker and Taker: The Fee Depends on How You Trade
Most crypto venues use a maker-taker fee model, and the distinction is about what your order does to the order book rather than what you are trying to achieve.
- A maker order adds liquidity. It rests on the book waiting to be filled — a limit order placed away from the current price. Makers are charged less, and on some venues are paid a rebate.
- A taker order removes liquidity. It executes immediately against orders already resting — a market order, or a limit order priced to fill at once. Takers are charged more.
The logic is that resting orders make a market usable, so venues subsidise them and charge those who consume them.
The practical consequence for a strategy is substantial. The same position entered as a taker rather than a maker can cost several times more in fees, every time it is opened or closed. For a directional trade expecting a large move, that difference is noise. For a strategy capturing a spread measured in basis points per interval, it is the difference between a viable position and an unviable one.
Post-Only Orders
A post-only order will only execute as a maker. If it would fill immediately against the book — making it a taker — the venue rejects or repositions it instead.
It is a precision tool with an obvious trade-off: you are guaranteed the maker fee and not guaranteed a fill. For patient execution that is usually the right trade. When a hedge needs to be established or restored quickly, it is not, because an unfilled order on one leg leaves a position unhedged — which is a far larger risk than a fee differential, as set out in collateral on the short leg.
Slippage: Why Your Fill Is Not Your Quote
Slippage is what happens when an order is larger than the liquidity available at the best price.
An order book is a queue of limit orders at successively worse prices. A market order fills against the best price first, then the next, and continues until it is complete. The average fill is therefore worse than the top of book, and the gap widens with size.
Three things make it worse: thin books, where little rests at each level; volatility, when market makers widen quotes or withdraw, as happened during the October 2025 cascade described in how liquidation cascades work; and urgency, because an order that must complete now cannot wait for depth to replenish.
The structural point: slippage is not a fee anyone charges. It is the cost of demanding immediacy from a market that does not have unlimited depth at any single price.
Slippage Tolerance on Decentralised Venues
On decentralised exchanges, slippage tolerance is a setting rather than an outcome — the maximum adverse deviation you will accept before the transaction reverts.
Set it too tight and transactions fail in volatile conditions, wasting fees. Set it too loose and you authorise a fill materially worse than quoted, which in thin markets can be exploited by transaction ordering. It is a genuine trade-off, not a value to maximise or minimise.
The Two-Leg Problem
This is where execution cost becomes strategy-defining rather than incidental.
| Directional position | Delta-neutral position | |
|---|---|---|
| Legs | 1 | 2 (spot + perpetual) |
| Executions to open | 1 | 2 |
| Executions to close | 1 | 2 |
| Total per round trip | 2 | 4 |
| Spreads crossed | 2 | 4 |
| Exposed to slippage on | 2 fills | 4 fills |
A hedged position pays twice the execution cost of a directional one for the same notional exposure, because every component is duplicated across both legs.
There is a second-order problem too. The two legs must be executed close together in time. A hedge established with one leg filled and the other delayed is temporarily directional — and if the price moves in between, the position starts at a loss relative to the intended entry. That is execution risk rather than execution cost, and it is the reason hedged strategies care about fill speed as much as fill price.
Worked Example: What a Round Trip Costs
Assume a $100,000 hedged position, four executions per round trip, at an average all-in cost of 0.05% per execution.
- Total round-trip cost: 4 × 0.05% = 0.20% of notional, or $200.
- Income at a baseline funding rate of 0.01% per eight hours: 0.03% per day, or $30.
- Days of accrual to recover the round trip: approximately 6.7.
Now execute the same position as a maker on both legs, at say 0.01% per execution:
- Total round-trip cost: 0.04%, or $40.
- Days of accrual to recover: approximately 1.3.
Illustrative arithmetic. Fee schedules vary by venue and volume tier, spreads and slippage vary with conditions and size, and funding rates are variable and can turn negative.
The point is not the specific numbers. It is that execution quality moves the break-even holding period by a factor of five on identical gross funding — which is why a strategy rotating positions frequently can convert a positive gross spread into a negative net result without any adverse market move at all. This is the detail behind the second of the four assumptions in why an annualised funding rate is not a return.
How Desks Reduce Execution Cost
The available levers are unglamorous and mostly about patience.
- Trade as a maker where the position allows it. The largest single saving, available whenever entry is not urgent.
- Break large orders up. Splitting across time reduces depth consumed at any moment, at the cost of exposure to price movement during execution.
- Avoid transacting during stress. Spreads widen and depth thins exactly when urgency peaks, which is the most expensive possible moment to demand immediacy.
- Hold longer. Round-trip costs are fixed per rotation, so a longer holding period amortises them over more accrual.
- Choose venues on depth, not headline fees. A lower fee schedule on a thin book is frequently more expensive once slippage is counted.
- Execute both legs together. Reduces the window in which the position is unintentionally directional.
None of these eliminate the cost. They determine whether it consumes days or weeks of accrued income.
The SEC's investor education on types of orders covers the general mechanics of market and limit orders, which behave the same way in crypto markets as in equities — the venue conventions differ, the queue does not.
Frequently Asked Questions
What is slippage in crypto?
The difference between the expected price of a trade and the price actually received. It occurs when an order is larger than the liquidity available at the best price and fills against progressively worse levels in the order book. It increases with order size, thin books and volatility.
What is the difference between a maker and a taker?
A maker order adds liquidity by resting on the order book until filled. A taker order removes liquidity by executing immediately against orders already there. Venues charge takers more and makers less, because resting orders make the market usable.
What is a post-only order?
An order that will only execute as a maker. If it would fill immediately against the book, the venue rejects or repositions it. It guarantees the maker fee but does not guarantee a fill.
What is slippage tolerance?
On decentralised exchanges, the maximum adverse price deviation you will accept before a transaction reverts. Too tight and transactions fail during volatility; too loose and you authorise a materially worse fill than quoted.
Why does execution cost matter more for market-neutral strategies?
Because a hedged position has two legs, so every round trip involves four executions rather than two — twice the spread crossings and twice the slippage exposure for the same notional. Against a return measured in basis points per interval, that difference determines viability.
The Cost Between the Decision and the Position
Execution cost is the distance between deciding to hold something and actually holding it, and it is paid again on the way out.
For strategies expecting large directional moves it is a rounding error. For strategies capturing a thin, recurring spread it is one of the primary determinants of whether the spread survives — and unlike market conditions, it is substantially within the operator's control. Which makes it one of the more informative things to ask about, and one of the least often disclosed.
This article is published for informational purposes and does not constitute investment advice or an offer to transact. All figures are illustrative arithmetic on hypothetical positions; fee schedules, spreads, depth and funding rates vary by venue and over time. Capital is at risk.
This article is for information only and is not investment advice. Past performance does not guarantee future results.
