Market microstructure & order books

Maker vs taker

∞structural
Reviewed 4 June 2026. As of 2026: a permanent feature of the market, not an edge that decays.

Post liquidity and you are a maker (often paid a rebate); cross the spread and you are a taker (you pay a fee). The maker-taker fee model shapes who quotes, where, and why rebate capture exists at all.

The idea

Maker vs taker annotated diagramfigure
Post liquidity and you are a maker (often paid a rebate); cross the spread and you are a taker (you pay a fee). The maker-taker fee model shapes who quotes, where, and why rebate capture exists at all.

Reference figure. This concept is explained in prose and diagram; the interactive widgets live on the flagship pages it links to under Where this fits.

What is the difference between a maker and a taker?

A maker is whoever posts a resting limit order into the book, providing liquidity for others to trade against. A taker is whoever crosses the spread with a marketable order, consuming that resting liquidity. Every trade pairs exactly one maker and one taker. Crucially, the distinction is about who supplied the liquidity, not about buying versus selling: a resting buy limit is a maker buy; a market buy is a taker buy.

The intuition is patience versus impatience. The maker is the patient side: it sits in the queue, waits to be hit, and earns the spread if it is filled before the price moves. The taker is the impatient side: it pays the spread to trade now, with certainty of execution. This maps directly onto the two order primitives from the limit order book (post a limit and you are a maker; send a market or marketable limit and you are a taker) and onto price-time priority: the maker's reward for waiting is the spread, conditional on its queue position and on not being adversely selected.

Every fill has one maker and one taker. The maker captures the half-spread for waiting; the taker pays the half-spread for immediacy and certainty.
maker: +S2  (if filled)taker: −S2  (certain, now)\text{maker: } +\tfrac{S}{2} \;\text{(if filled)} \qquad \text{taker: } -\tfrac{S}{2} \;\text{(certain, now)}

What is the maker-taker fee model?

The maker-taker model prices the two roles asymmetrically: the venue charges the taker an access fee for removing liquidity and pays the maker a rebate for providing it, keeping the difference between the two. The rebate subsidises quoting, which tightens displayed spreads; the taker fee funds the rebate. It is the dominant fee structure on US equity exchanges and most crypto venues, as of 2026.

The mechanics are simple per fill: your net economics are the quoted edge plus or minus the fee. A maker who buys at the bid and later sells at the ask captures the spread plus two rebates and pays nothing in access fees; a taker who crosses twice pays the spread plus two access fees. The fees are tiny per share or lot but enormous in aggregate at HFT volumes. In US equities, access fees are capped by Reg NMS Rule 610 (historically a $0.0030-per-share cap, with the SEC having consulted on lowering and tiering it, so verify the current cap as of 2026), while rebates are set per venue and per tier. In crypto, maker and taker tiers are explicit and published, improving with volume: makers often pay zero or negative fees and takers pay a few basis points. The model is the same; the numbers are larger and far more transparent than in equities. The exchange's incentive is a two-sided market: rebates attract quoting (displayed liquidity), which attracts taker flow (which pays the fees). Critics argue the rebate creates a broker conflict (routing for the rebate rather than best execution), which is the regulatory pressure point.

The taker fee funds the maker rebate, and the venue keeps the wedge. Your per-fill economics are the quoted edge adjusted by the relevant fee.
net edgemaker=S2+r,net costtaker=S2+f,f>r\text{net edge}_{\text{maker}} = \tfrac{S}{2} + r, \qquad \text{net cost}_{\text{taker}} = \tfrac{S}{2} + f, \qquad f \gt r

What is the maker/taker trade-off?

Posting as a maker earns the spread and the rebate but risks not being filled, being filled late, and, worst, being filled only when the price is about to move against you, which is adverse selection. Crossing as a taker guarantees immediate execution but pays the spread and the access fee. The right choice depends on urgency, fill probability, and how toxic the flow is.

The maker's expected economics are roughly its fill probability times the edge it captures, less the cost of not being filled when it needed to be. The first three terms inside are the edge (half-spread, rebate, minus adverse-selection cost) and the last terms are exactly why "just post and collect the rebate" is naive. When flow is informed and toxic, the adverse-selection cost can exceed the half-spread plus the rebate, and the maker bleeds: the central risk of market making. The taker's economics are the mirror image: it pays the half-spread plus the access fee for certainty and speed, worth it only when the value of immediacy (acting on a signal before it decays, or unwinding risky inventory) exceeds that cost, which is exactly when execution algorithms decide whether to cross or to post. The decision is not static: many strategies post first (capturing spread and rebate if filled) and cross only if they are not filled in time, a maker-then-taker policy. That is where order types like post-only and IOC (see order types) become tactical tools.

A maker's expected edge is its fill probability times the half-spread plus rebate minus adverse selection. The rebate flatters the line; adverse selection is what actually decides whether posting pays.
E[P&Lmaker]≈Pfill(S2+r−AdvSel)−Cnon-fill\mathbb{E}[\text{P\&L}_{\text{maker}}] \approx P_{\text{fill}}\big(\tfrac{S}{2} + r - \text{AdvSel}\big) - C_{\text{non-fill}}
▸ Show the post-versus-cross break-even optional

Write the maker's per-fill expectation with an explicit adverse-selection term. For a passive buy filled at the bid, the expected post-fill price change E[Δp∣filled]\mathbb{E}[\Delta p \mid \text{filled}] is negative on toxic flow: you are bought from just before the price falls. Let α=−E[Δp∣filled]≥0\alpha = -\mathbb{E}[\Delta p \mid \text{filled}] \geq 0 be that adverse-selection cost.

edgemaker=S2+r−α\text{edge}_{\text{maker}} = \tfrac{S}{2} + r - \alpha

Crossing instead costs the half-spread plus the access fee, S2+f\tfrac{S}{2} + f, with certainty. Posting beats crossing in expectation when the maker's fill-weighted edge exceeds the negative of the taker's cost, i.e. when adverse selection is small enough.

Pfill(S2+r−α)  >  −(S2+f)P_{\text{fill}}\big(\tfrac{S}{2} + r - \alpha\big) \;\gt\; -\big(\tfrac{S}{2} + f\big)

Solving for the break-even adverse-selection cost gives the threshold above which you should cross rather than post. As α\alpha rises with flow toxicity, the rebate rr matters less and less, which is precisely why rebate capture is a thin overlay, not a standalone edge.

α∗=S2+r+S2+fPfill\alpha^{*} = \tfrac{S}{2} + r + \frac{\tfrac{S}{2} + f}{P_{\text{fill}}}

What are inverted venues, and what about rebate capture?

An inverted (taker-maker) venue flips the model: it pays the taker and charges the maker. By rewarding aggressive flow it pulls takers in, and a maker who pays to post there may get better queue priority and fill rates because takers are incentivised to cross on that venue. Inverted venues are used as a routing tool (cheap removal of liquidity) and as a fill-rate tactic, and they coexist with maker-taker venues across the fragmented US equity landscape.

Standalone rebate capture (quoting purely to collect the maker rebate, treating the spread as secondary) only works if you can hold good queue position and avoid adverse selection. So it collapses into the same speed-and-queue race as passive market making, and is, honestly, commoditised: the rebate edge is real but competed to the bone, surviving mainly as a thin overlay on genuine liquidity provision rather than fresh alpha (as of 2026). It is not a beginner's free lunch, and the dedicated treatment in rebate capture says so plainly. Hanging over all of this is the regulatory overhang: the rebate is the textbook broker best-execution conflict (route for the rebate, not the client's price), so the maker-taker model itself is under review, with access-fee caps, rebate transparency and pilot proposals recurring. Treat the specific numbers as live and source them.

On a maker-taker venue the maker collects the rebate; on an inverted venue the maker pays to post but may win better priority. Rebate capture lives or dies on fill quality, not on the rebate line.
maker-taker: r>0, f>0inverted: r<0, f<0\text{maker-taker: } r \gt 0,\, f \gt 0 \qquad \text{inverted: } r \lt 0,\, f \lt 0

Worked example

Take synthetic US-equity-style fills on a maker-taker venue, as of 2026. Reproduce them with the sliders on the effective-edge diagram above. The quoted spread is $0.01 (one cent), the maker rebate is $0.0020 per share, and the taker access fee is $0.0030 per share. You trade 10,000 shares per round-trip (buy then sell). Everything here is synthetic.

A pure maker round-trip (buy at the bid, sell at the ask, both passive) captures the full $0.01 spread, which is $100, plus two rebates of 2×10,000×$0.0020=$402 \times 10{,}000 \times \$0.0020 = \$40. Gross before adverse selection is $140. But suppose half your fills happen just as the price ticks against you, costing on average $0.004 per share on those: 0.5×10,000×$0.004×2≈−$800.5 \times 10{,}000 \times \$0.004 \times 2 \approx -\$80 of toxic-fill drag. Net is about $60: the rebate did not save a bad fill mix. A pure taker round-trip that crosses both ways pays the $0.01 spread (−$100-\$100) plus two access fees of 2×10,000×$0.0030=$602 \times 10{,}000 \times \$0.0030 = \$60, for −$160 in costs: the price of certain, immediate execution, worth paying only when immediacy is worth at least $160 on this trade.

The rebate ($40) is small beside both the spread ($100) and the adverse-selection drag ($80). Rebate capture is decided by fill quality, not the rebate, which is why it is commoditised, not magic.
$100⏟spread+$40⏟rebates−$80⏟adverse selection=$60    net (maker)\underbrace{\$100}_{\text{spread}} + \underbrace{\$40}_{\text{rebates}} - \underbrace{\$80}_{\text{adverse selection}} = \$60 \;\;\text{net (maker)}

The lesson is the relative sizes. The rebate is a sliver next to the spread you capture and the adverse selection you suffer, so a maker that quotes the same screen spread as a rival but suffers a worse fill mix earns dramatically less: same rebate line, very different realised P&L. That is why the durable edge is fill quality (knowing when flow is benign enough to post and when it is toxic enough to cross) not the rebate itself. The numbers here are synthetic and rounded; real rebates, access fees, the Reg NMS Rule 610 cap, and adverse-selection costs are venue- and regime-specific and must be verified against the venue's fee schedule and the SEC rule text, and dated.

Where this fits

↑ Up · building block of Market microstructure ↔ Across · composes with Price-time priority & queue value ↔ Across · composes with Rebate capture ↔ Across · composes with Transparent costs → Apply · makes money in Market making → Apply · makes money in Equities & futures ⤓ Build / Buy · tool needed Datasets & tools

Common questions

Do I need maker rebates to make money market-making?
Not necessarily, but they change the maths. On maker-taker venues, rebates can flip a thin or negative gross spread into a profitable one, and some strategies exist only to capture them. On crypto and prediction-market venues fee schedules differ; many have no rebate, so the edge must come from spread and signal alone. Whether rebates are essential depends entirely on the venue’s fee model.