Market making on Polymarket means posting two-sided limit orders on its order book so you profit from the bid-ask spread instead of betting on an outcome. You pay zero trading fees as a maker and collect a daily rebate on top, a structure that turned this from a niche activity into a real strategy once Polymarket redesigned its fees. This is a different game than the one played by Polymarket's most profitable directional traders, who profit from being right about an outcome rather than from the spread itself. This guide walks through the setup, the quoting decisions, and the one risk that erases more market-making income than any fee ever could.
What You Need Before You Start
- A funded Polymarket wallet with pUSD or USDC. Buy orders draw on your available pUSD; sell orders require you to already hold the outcome tokens you're quoting.
- Trading approvals set up. Polymarket requires you to authorize the contracts that let you trade outcome tokens and manage positions before any order goes live.
- A way to place and cancel limit orders fast. All trading runs through a Central Limit Order Book (CLOB) built on Polygon, and your orders sit on that book until filled or cancelled. Manual quoting works for slow-moving markets; anything liquid enough to be worth making will punish a slow manual process. If you're building automated quoting rather than clicking manually, our guide to using OpenClaw for Polymarket trading covers the automation layer this guide doesn't.
- A live news feed or monitoring system. This isn't optional. The single biggest risk in this activity depends on knowing when to pull your quotes before a price move hits you, not after.
- Capital you can afford to see move against you fast. There's no fixed minimum, but sizing too small means the daily rebate never clears your time cost, and sizing too large in one market means a single news event can wipe out months of income.
The item that trips people up most: skipping the approvals step. Without it, your first order simply won't submit, and it's easy to mistake that for a platform bug rather than a missing permission.
Time Estimate
Setting up wallet approvals and placing your first quote takes 10 to 15 minutes. That's the active, one-time setup.
Ongoing, market making isn't a set-and-forget task. A manual market maker checking quotes a few times a day should expect 20 to 30 minutes of active monitoring per session, and professional operators run this continuously with automated systems, since documented returns of $150 to $300 per market per day only show up with near-constant attention to the book. Budget your first week as a learning period, not an earning one.
The Steps
Step 1: Understand Why The Fee Structure Favors You
Makers on Polymarket pay zero trading fees, and on top of that collect a share of the taker fees other traders pay. That rebate share is 25% in most categories, 20% in crypto, and 15% in sports following a July 2026 rate change. A maker whose orders fill exactly at the midpoint, capturing no spread profit at all, is still net positive from rebates alone. That wasn't true in older versions of the platform, and it's the structural reason market making pays now when it didn't before.
Result: you understand your floor. Even a break-even spread strategy earns you rebate income, which changes how aggressively you can afford to quote.
Step 2: Choose Which Markets To Make
Not every market is worth quoting. Pick markets with enough taker volume to generate meaningful rebates, but far enough from their resolution date that a single news event doesn't blindside you. A market closing in hours carries a much higher chance that decisive information lands while your quote is still live.
Crypto markets carry the highest rebate share at 20%, but also the highest volatility of any category. A market like the Zcash price prediction contracts is a useful example of the tradeoff: the rebate is attractive, but a crypto-linked market can reprice on a single exchange listing or protocol announcement just as fast as a political market reprices on a headline.
Result: a shortlist of markets where volume is real but the resolution date isn't imminent.
Step 3: Set Your Quotes Around Fair Value
Post a bid and an ask around what you believe the true probability is, not just around the current midpoint. The midpoint tells you where the book sits right now; it doesn't tell you whether that price is actually fair. In a binary market, remember that buying NO at 48 cents is economically identical to selling YES at 52 cents, so check both sides of the book before deciding your quote is competitive.
Before submitting anything, confirm the market is still accepting orders and check its minimum price increment and minimum order size, since a quote outside those bounds simply won't post.
Result: two live orders, one bid and one ask, sitting on the book at prices you'd genuinely be willing to trade at.
Step 4: Manage Your Inventory As Fills Come In
Every fill changes your exposure. A buy order consumes your available pUSD; a sell order requires you to already hold the outcome tokens. As your position builds in one direction, skew your next quotes to lean against it, quoting less aggressively on the side that would add to your exposure and more aggressively on the side that would reduce it.
Polymarket's own documentation on this is direct: quote both sides to provide liquidity in both directions, and skew on inventory to manage exposure as it accumulates. If you need to unwind a position outright rather than waiting for market flow to do it, splitting pUSD creates a complete set of outcome tokens and merging a complete set returns pUSD, giving you a direct lever independent of new fills.
Result: your net exposure stays inside a range you've decided in advance, rather than drifting wherever the last hour of fills happened to push it.
Step 5: Widen Or Pull Your Quotes Before Known Risk Events
This is the step that separates a market maker who survives from one who doesn't. Before elections, court rulings, or scheduled economic data releases, widen your spread or cancel your quotes entirely rather than leaving them resting through the announcement. The danger isn't hypothetical: prices on Polymarket can move 40 to 50 percentage points within seconds on breaking news, a move that swamps any spread you've captured across dozens of prior round-trips.
Two real examples show how fast this happens. When the Epstein files release pushed Polymarket odds past 95%, that repricing happened in the space of a single news cycle, not a gradual drift. The same pattern held around the California billionaire wealth tax vote, where a scheduled, known event date still produced a sharp repricing the moment the result was confirmed. A resting quote through either moment would have been picked off at the old price.
Result: your resting orders are either wide enough to survive a shock or off the book entirely when one hits.
Step 6: Cap Your Maximum Position Size Per Market
Decide your ceiling before you need it, not during a fast-moving book. The math against oversizing is stark: $500 of extra exposure at a 53-cent price works out to roughly 943 shares, an order of magnitude beyond a typical starting position, and that's exposure you're carrying for spread income that doesn't scale with the tail risk attached to it.
Result: a hard position limit per market that you don't override in the moment, because the moment is exactly when you're most tempted to.
Troubleshooting
My order won't submit, even though I have funds. This is almost always a missing trading approval, not an insufficient balance. Polymarket requires you to authorize the outcome-token contracts separately from funding your wallet; if you skipped that step, go back and set it up before troubleshooting anything else.
My quotes keep getting picked off right before news breaks. This is adverse selection, and it's the single documented risk that determines whether market making on Polymarket is profitable at all: your spread income across many small, boring fills has to exceed the occasional large loss from a fill that happened right before information hit the market. If this keeps happening around the same category of event, that's a signal to widen further or stop quoting that market type in the window before the event.
My inventory keeps drifting to one side no matter how I quote. This usually means your bid and ask aren't actually symmetric around true fair value, only around the visible midpoint, which can lag the market's real belief. Recheck fair value independently rather than assuming the book's midpoint is correct, and skew your next quotes harder against the side you're accumulating.
I'm barely breaking even after rebates. Confirm which category your market falls under. Sports currently pays a 15% maker rebate, crypto pays 20%, and most other categories pay 25%, so a strategy that works in one category may not clear its costs in another without adjustment.
Frequently Asked Question
Are people really making money on Polymarket?
Yes, though unevenly. One academic study of market-making performance, Akey et al. (2025), identified market making specifically as the only strategy class it found to be a strong predictor of positive returns, with collective market-maker profits exceeding $20 million in 2024. That doesn't mean every participant profits; the study describes an extreme skill distribution, closer to professional poker than passive investing, and it's a different population from the directional traders who've made the most money on the platform.
Is being a market maker risky?
Yes, and the specific risk is adverse selection rather than simple market direction. Prices can move 40 to 50 percentage points in seconds on breaking news, a move that can erase far more than any spread captured across prior trades. The risk is manageable through wider spreads before known events and hard position limits, but it can't be eliminated.
Who is the biggest market maker in the crypto industry?
There's no single official league table, but Wintermute is the name that comes up most consistently as the largest by volume: it executes roughly $15 billion in daily trading volume across more than 65 venues, according to industry tracker Coingape. Wintermute, GSR Markets, Cumberland (the crypto arm of proprietary trading firm DRW), Jump Crypto, and DWF Labs are the five firms most consistently named across independent rankings as the industry's leading market makers.
Can I make a living off Polymarket?
Documented professional returns run $150 to $300 per market per day on markets with sufficient liquidity, but that figure comes from operators running co-located infrastructure and sub-10ms latency, not manual quoting from a browser tab. A retail participant competing on equal terms with that kind of setup is the exception, not the expectation.
How much money can you make off Polymarket?
It depends entirely on category, position size, and how well you manage adverse selection, since a single mistimed fill can offset weeks of accumulated rebate income. The rebate floor is predictable: 25%, 20%, or 15% of taker fees depending on category. The spread income on top of that floor is not, since it depends on execution quality most retail setups can't match.
What's a Polymarket market maker bot, and do I need one?
A market maker bot automates quoting and cancellation faster than a human can act manually, which matters because professional operators in this space target sub-10ms round-trip latency. You don't strictly need one to place manual quotes on slower-moving markets, but any market liquid enough to generate meaningful rebate income is also fast enough that manual quoting puts you at a structural disadvantage. Our OpenClaw automation guide for Polymarket covers what building that automation actually involves.
What's Polymarket's market-making rewards program, separate from maker rebates?
The Maker Rebates Program pays a daily share of taker fees to resting orders that get filled, funded directly by those fees and distributed in pUSD at midnight UTC with a $1 minimum payout. It's separate from Polymarket's Taker Rebate Program, launched May 28, 2026, which instead rebates takers 3% to 50% of their own fees based on 30-day trading volume tier. If you're comparing the two, you're not choosing between them: makers and takers are different roles in the same trade.
What's a basic Polymarket market-making strategy for a beginner?
Start with quoting both sides of a single, liquid, non-imminent market rather than spreading thin across several at once. Keep your position size small enough that a 40-to-50-point adverse move wouldn't be a serious loss, skew your quotes as inventory builds, and pull your orders entirely before any scheduled event tied to that market. Build up to more markets only once you can do that consistently without checking the book every few minutes out of anxiety.
