Market Making on Betfair: Is It Possible?

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This is a sub of our advanced strategies pillar, aimed at traders who already understand scalping and want to know whether the financial-markets concept of market making translates to the Betfair Exchange. It's a question I get from ex-City traders constantly, and the honest answer needs more nuance than the usual yes/no.

What market making means

In financial markets a market maker continuously quotes two prices — a (lower) bid they'll buy at and a (higher) offer they'll sell at — and earns the spread between them by being the counterparty to both buyers and sellers. They don't care which way the price goes; they profit from the flow crossing their spread, over and over, at volume. On Betfair the equivalent is offering to back at one price and lay at a price one or two ticks shorter, so that when both your orders get matched you've effectively bought low and sold high on the same runner — locking a small profit independent of the result.

If that sounds exactly like two-sided scalping, it's because it is. The difference is mindset: a scalper takes a directional view and trades around it; a market maker is deliberately neutral, sitting passively on both sides of the book and harvesting the spread from other people's impatience. The mechanism is identical; the intent is “provide liquidity and get paid for it” rather than “predict the next tick.”

So is it actually possible on Betfair?

Mechanically, yes — the Exchange is an order-driven market where you can post passive back and lay orders and wait to be matched, which is precisely what a market maker does. But three features of Betfair make it far less attractive than financial market making, and pretending otherwise is how people lose money on it.

First, commission. A financial market maker keeps the full spread; on Betfair you pay 2–5% commission on net winnings, which eats a large chunk of an already-thin spread. Worse, if you're a heavy-volume winner you may hit the Premium Charge — up to 50% or more on net profits — which is effectively a tax on exactly the high-turnover, low-margin style market making depends on. This is the single biggest structural obstacle and it specifically punishes the market-making profile.

Second, the spread is tiny. In a liquid Betfair market the gap between best back and best lay is often a single tick. You can't make a market with no spread, and a one-tick spread minus commission is wafer-thin per trade — it only adds up at serious volume.

Third, adverse selection and inventory risk. When the price genuinely moves, the side you don't want gets filled and the side you do want runs away. You end up holding a position (inventory) that's already offside — you bought as the price fell through you. Financial market makers manage this with sophisticated hedging; on Betfair you manage it with a hard stop and the deep liquidity to exit, but it's a constant drag.

Where it can actually work

Despite all that, a market-making style does pay for some traders in the right conditions, which are narrow and specific:

• Deep, liquid markets only — pre-off favourites in big races, in-play football Match Odds, top tennis matches. You need huge two-way flow so both sides fill repeatedly. In a thin market you'll only ever get the bad fill.
• Stable, range-bound prices — market making thrives when a price oscillates within a tick or two and dies when it trends. You want chop, not a move.
• At scale, mechanically — the per-trade edge is so small that it only matters across hundreds of fills, which in practice means automation. Doing this manually one trade at a time rarely clears commission.

This is, in effect, what high-frequency-style Betfair traders attempt — automated, two-sided, high-volume quoting in the deepest markets. It's the most technically demanding corner of exchange trading and the closest Betfair gets to genuine financial market making.

Market making vs scalping: the honest distinction

For 99% of traders, the right move is to stop calling it market making and just do disciplined scalping with a directional bias. Pure neutral market making — sitting passively on both sides indefinitely — needs volume, automation and the deepest markets to overcome commission, and even then the edge is razor-thin. Scalping with a read, where you lean toward the side you think the weight of money favours, gives you a better expected fill and a directional cushion against the adverse move that punishes pure market makers. The concept of capturing the spread is useful; the dogma of perfect neutrality usually isn't.

The Premium Charge problem in detail

The single biggest reason market making is harder on Betfair than in financial markets deserves its own section: the Premium Charge. Betfair applies an additional charge to a small number of very profitable, high-volume accounts — the calculation is based on the ratio of charges paid to gross profits, and it can take 50% or even 60% of net winnings once you cross the thresholds. Market making is, almost by definition, a high-turnover low-margin activity, which is precisely the profile that triggers it. You can do everything right — build a genuine spread-capture edge, automate it cleanly, scale it — and watch Betfair take half your profit for the privilege.

This isn't a hypothetical for serious market makers; it's the structural ceiling on the whole strategy. A financial market maker keeps essentially all of a tight spread and makes money on volume. A Betfair market maker keeps the spread minus base commission, and then, if successful enough, minus a Premium Charge that scales with exactly the success the strategy is designed to produce. The brutal irony is that the better your market making works, the more likely it is to hit the charge that makes it unviable. Anyone modelling market-making returns on Betfair who ignores the Premium Charge is modelling a fantasy — it's the first number I'd plug into any serious projection, not the last.

What ex-City traders get wrong about Betfair

I've coached a few traders who came from financial markets expecting Betfair to be an easy, less-regulated version of what they already did. They consistently get three things wrong. First, they underestimate commission and the Premium Charge — in equities your costs are basis points; on Betfair they're whole percentage points of profit, which changes which strategies are even viable. Second, they over-trust the order book: Betfair's weight of money looks like a depth-of-market display but is far more easily spoofed and far less informative about true intent. Third, they misjudge liquidity — even Betfair's deepest markets are thin compared to a liquid equity, so position sizes that are trivial in finance move the price here.

The deeper point is that Betfair is a betting exchange with a hard expiry (the event resolves), not a continuous financial market, and the strategies that survive are the ones built around that reality rather than imported wholesale. The spread-capture instinct is sound; the assumption that financial-markets scale and cost structures apply is not. The traders who adapt fastest are the ones who treat Betfair as its own beast — learning the exchange mechanics from scratch and respecting that a one-tick spread minus a fifth in commission is a very different animal from a liquid bid-offer in equities. The advanced pillar and HFT-style trading piece map the realistic frontier.

Who actually succeeds at quoting both sides

For all the caveats, a handful of traders genuinely do make spread-capture pay on Betfair, and it's worth being precise about who they are, because it isn't most people. They are, almost without exception, automated and technical — running software that quotes, manages inventory and stops out faster than any human, in the deepest markets, across enough volume that a fraction-of-a-tick edge compounds. They've usually modelled the Premium Charge into their expectations from day one and accept that it caps their ceiling. And they treat it as one strategy among several, not a sole income.

What they are not is manual traders clicking both sides of a ladder hoping the spread falls into their lap. That version — the one the word “market making” conjures — loses to commission and adverse selection for almost everyone who tries it. So the honest answer to “can I market-make on Betfair?” depends entirely on who's asking: a strong programmer with capital, patience and realistic expectations about the Premium Charge, maybe; a discretionary trader looking for an easy spread, no. If you're in the second group, the better path is disciplined scalping with a directional read — you keep the useful part (capturing small moves) and drop the part that doesn't work (textbook neutrality against the commission drag). The advanced pillar is honest about where the real frontier sits.

A practical takeaway for ordinary traders

If you take one practical thing from all this, make it this: steal the mechanic, skip the dogma. The genuinely useful idea inside market making is that you can profit from the spread — backing high and laying a tick or two lower on the same runner — without ever having a view on who wins. That's a real, learnable skill and it's the heart of scalping. What you should drop is the financial-markets dogma of perfect two-sided neutrality at scale, because Betfair's commission, thin spreads and the Premium Charge make that version brutal for anyone without serious automation.

So treat “market making on Betfair” as a useful mental model rather than a literal job description. Learn to read the weight of money, capture small moves on a proper ladder, and lean toward the side the flow favours rather than sitting passively on both. You'll get most of the benefit the concept promises, with a directional cushion against the adverse selection that punishes pure market makers — and without needing to build a high-frequency trading operation to overcome the cost drag. That's the honest, usable version of the idea for the 99% of traders who aren't running automated quoting engines.

The verdict

Is market making possible on Betfair? Yes — mechanically it's just aggressive two-sided scalping in a liquid book, and some automated traders genuinely run it. But it's no free lunch: a one-tick spread, 2–5% commission, the looming Premium Charge on consistent winners, and constant inventory risk when only one side fills. It pays only in the deepest, most stable markets, only at volume, and realistically only with automation. My honest advice: learn the spread-capture mechanic, but trade it as directional scalping with a read rather than chasing textbook neutrality. Go deeper with the advanced strategies pillar, HFT-style trading, and scalping.

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Related reading

Go deeper with the advanced strategies pillar, the closely related HFT-style trading, and the scalping strategy it builds on; understand the cost drag in commission and the Premium Charge.