Polymarket pays traders to provide liquidity. Not through fees. Not through the spread. Through a standalone rewards program that distributes USDC every day to anyone who parks limit orders near the midpoint price of a market.
This is reward farming — a strategy built around maximizing your score in Polymarket’s Liquidity Rewards Program. If you can keep orders resting in the book, close to the midpoint, on both sides of the market, you earn rewards regardless of whether those orders ever get filled.
It sounds straightforward. But the mechanics under the surface — quadratic scoring, two-sided weighting, per-minute sampling — reward precision. This guide breaks down how the program actually works, how to position yourself for meaningful rewards, and where the strategy can hurt you.
Reward Farming Is Not the Maker Rebates Program
Before going further, a critical distinction. Polymarket runs two separate incentive programs for liquidity providers:
-
Maker Rebates Program — Pays you a share of taker fees when your resting limit orders are filled. You only earn rebates when a trade executes against your order. The more volume your orders absorb, the more you earn. This is covered in our Polymarket fees guide.
-
Liquidity Rewards Program — Pays you for having limit orders in the book near the midpoint. Your orders do not need to be filled. You earn rewards simply by keeping them posted. This is what reward farming targets.
These programs stack. A resting limit order near the midpoint can earn liquidity rewards for being there and a maker rebate if it gets filled. But the strategies for optimizing each are different. Reward farming is specifically about the second program — maximizing your liquidity reward score.
How the Liquidity Rewards Program Works
Polymarket’s Liquidity Rewards Program is designed to achieve several goals simultaneously: catalyze liquidity across all markets, encourage liquidity throughout a market’s entire lifecycle, motivate passive and balanced quoting tight to the midpoint, encourage trading activity, and discourage blatantly exploitative behavior.
Here is how it operates in practice.
Scoring Your Orders
Every minute, the system takes a snapshot of the order book using random sampling. Each of your resting limit orders receives a score based on how close it sits to the midpoint price.
The scoring formula is quadratic:
S(v, s) = ((v - s) / v)^2 * b
Where:
- v = the maximum spread from the midpoint (in cents) — orders beyond this distance score zero
- s = the spread from the size-cutoff-adjusted midpoint — how far your order actually sits from the midpoint
- b = the order size
The quadratic shape is important. An order sitting right at the midpoint scores dramatically higher than an order a few cents away. Moving from 3 cents away to 1 cent away does not triple your score — it increases it by far more than that, because the curve is steep near the center and flat near the edges.
Orders beyond the maximum incentive spread (max_incentive_spread) score zero. Orders below the minimum incentive size (min_incentive_size) also score zero. Both parameters are market-specific and can be fetched through the CLOB API.
Two-Sided vs. Single-Sided Liquidity
The program strongly favors two-sided liquidity — having orders on both the Yes and No sides (or equivalently, bid and ask) of the same market.
When you quote both sides, the system uses Q_min, the minimum score across your two sides, as your base reward input. This rewards balanced quoting: if you have strong orders on one side and nothing on the other, your Q_min is zero.
When you only quote one side while the midpoint is between 0.10 and 0.90, your score is divided by a constant c = 3.0. You earn one-third of what a two-sided quoter would earn for the same placement. That is a steep penalty, but it does not shut you out completely.
When the midpoint is outside the 0.10 to 0.90 range — meaning the market is heavily lopsided — liquidity must be double-sided to score at all. Single-sided orders earn nothing in these extreme-probability markets.
The message is clear: Polymarket wants quoters who provide depth on both sides of the book. If you are going to farm rewards, plan to quote both sides.
Reward Distribution
Scores are calculated every minute across all participants, all markets, and the full epoch (daily cycle). At the end of each epoch — midnight UTC — the system normalizes scores across all participants in each market and distributes rewards proportionally.
If you earned 10% of the total score in a given market’s epoch, you receive 10% of that market’s reward pool for the day. Rewards are paid in USDC directly to maker addresses. There is a minimum payout threshold of $1 — if your share of a market’s pool falls below $1, it is not distributed.
Strategy: Optimizing Your Reward Score
The scoring formula creates a clear optimization surface. Here is how to work it.
Get Close to the Midpoint
This is the single biggest lever. The quadratic curve means that marginal improvements in spread — moving one or two cents closer to the midpoint — produce outsized gains in score. An order 1 cent from the midpoint scores far higher than an order 4 cents away, even though the distance difference is only 3 cents.
The practical implication: small improvements in order placement matter. If you can safely tighten your quotes by even a fraction of a cent, the reward payoff is disproportionate.
Always Quote Both Sides
The 3x penalty for single-sided quoting (and outright exclusion when the midpoint is outside 0.10-0.90) makes two-sided quoting effectively mandatory for serious reward farming. Structure your capital to post orders on both Yes and No sides of a market.
This does not mean your orders need to be symmetrical. You can quote tighter on one side and wider on the other. But you need something on both sides to avoid the penalty.
Size Matters, But Placement Matters More
Your order size (b) scales your score linearly. Doubling your order size doubles your score. But the spread component is quadratic — halving your distance from the midpoint more than quadruples your score. Placement dominates size.
That said, you need to meet the min_incentive_size threshold for each market or your orders score zero. Check this parameter through the API before deploying capital.
Choose Your Markets Carefully
Reward pools vary by market. Some markets have larger daily pools than others. The ratio of the reward pool to the number of active participants determines how much each farmer can realistically earn.
Look for markets where:
- The reward pool is meaningful relative to the number of competitors
- The midpoint is relatively stable (less frequent re-quoting needed)
- The midpoint sits between 0.10 and 0.90 (so single-sided quoting is at least possible as a fallback)
- Volatility is manageable (lower risk of adverse fills)
Avoid markets approaching a known catalyst — an election result, an earnings announcement, a deadline — where the price is likely to gap through your orders.
Monitor and Re-Quote
Because scores are sampled every minute, stale orders hurt you. If the midpoint moves and your orders are now further away, your score drops immediately. Active monitoring and re-quoting keeps your orders positioned where they score highest.
This does not mean you need to update every minute. But checking your positions a few times a day — or scripting order management through the Polymarket CLOB API — makes a meaningful difference versus purely passive order placement.
The Core Tension: Rewards vs. Fill Risk
Here is where reward farming gets difficult.
The scoring system pays you the most for orders placed as close to the midpoint as possible. But the midpoint is where the market trades. Orders close to the midpoint are the most likely to be filled.
When your limit order gets filled, you acquire a position. That position has directional exposure. If the market moves against you after the fill, you lose money. This is adverse selection — your order tends to get filled precisely when the market is moving away from your entry price, because informed traders are taking the other side.
The tension is real and unavoidable:
- Tight quotes = high reward scores, high fill risk, high adverse selection exposure
- Wide quotes = low reward scores, low fill risk, orders mostly sit untouched
There is no universally correct answer. The right placement depends on the specific market’s volatility, the size of the reward pool, and your risk tolerance. In stable, slow-moving markets with large reward pools, tighter quotes may be justified. In volatile markets approaching a catalyst, wider quotes — or no quotes at all — may be the better call.
This is the same risk-reward calculation that professional market makers face, except reward farmers have an additional income stream (the rewards themselves) that subsidizes the cost of adverse fills.
Risks and Realistic Expectations
Adverse Fills
Your orders will get filled. Not every day, but regularly. When they do, you are left with a directional position that you may not want. If you are quoting both sides, fills on one side create inventory that partially offsets — but only partially. Managing accumulated positions is part of the strategy.
Resolution Risk
If a market resolves while you hold a position accumulated through fills, that position pays out at $1.00 or $0.00. There is no gradual unwinding. If you bought Yes shares through fills and the market resolves No, those shares go to zero.
Competition
Liquidity rewards are normalized across all participants in a market. As more farmers enter a market, the same pool gets split more ways. Early entrants to a new market may earn outsized rewards; crowded markets produce thin returns per participant.
Returns Are Variable
Daily reward payouts depend on your relative score, the size of the pool, and the number of competitors. Some days will be good. Others will be below the $1 minimum threshold in certain markets. Do not assume a stable daily income.
Capital Is Locked
Your USDC is tied up in resting limit orders. It cannot be deployed elsewhere while it sits on the book. Factor in this opportunity cost — particularly if alternative yield options (stablecoin lending, bonding near-certain outcomes) are available.
Practical Walkthrough
Here is how to approach reward farming step by step.
1. Set up your account. You need a Polymarket account with USDC deposited to your trading wallet.
2. Check market parameters. Use the CLOB API to fetch min_incentive_size and max_incentive_spread for any market you are considering. These define the playing field — orders below the minimum size or beyond the maximum spread earn zero.
3. Identify the midpoint. The midpoint price is the reference point for scoring. Note where it sits and how volatile it has been recently.
4. Place two-sided orders. Post limit orders on both Yes and No sides, as close to the midpoint as your risk tolerance allows. Make sure each order meets the minimum incentive size.
5. Monitor fills and re-quote. If the midpoint drifts, your orders drift with it in terms of distance — and your score drops. Re-quote to stay tight. If orders get filled, decide whether to re-post at the new midpoint or manage the resulting position.
6. Collect rewards daily. Rewards hit your maker address at midnight UTC. Track your payouts relative to your capital deployed and any losses from filled orders to assess net profitability.
7. Evaluate net P&L. Reward farming profitability is not just reward income. It is reward income minus losses from adverse fills, minus opportunity cost of locked capital. Track all three.
Reward Farming vs. Market Making
Reward farming and market making overlap substantially. Both involve resting limit orders on both sides of the book. Both expose you to adverse selection. Both reward tighter quotes.
The key difference is the objective function:
- Market makers optimize for the spread — buying low and selling high across the bid-ask gap. Filled orders are the goal, because each fill captures a small profit.
- Reward farmers optimize for the reward score — keeping orders in the book near the midpoint. Filled orders are a side effect to be managed, not the primary income source.
In practice, the two strategies blend naturally. A market maker on Polymarket also earns liquidity rewards for the same orders that generate spread income. A reward farmer who occasionally gets filled also earns maker rebates and can capture the spread. You do not have to choose one or the other.
Where they diverge is in how you handle fills. A pure market maker actively manages inventory and tries to offset positions. A pure reward farmer may prefer to re-post orders and accept small position accumulation, focusing on keeping the score high rather than managing every fill.
For a detailed breakdown of the spread-capture side of the equation, see our market making strategy guide.
Key Takeaways
Polymarket’s Liquidity Rewards Program pays you for providing liquidity — not for trading, not for being right, but for keeping orders in the book near the midpoint. The scoring system is quadratic, favoring precision. Two-sided liquidity is strongly preferred, and in extreme-probability markets, it is required.
The strategy is accessible. You do not need to be a quantitative trader or run automated infrastructure. But it is not free money. The orders that score highest are also the most likely to get filled, and fills carry real directional risk. The best reward farmers manage this tension deliberately — tight enough to score well, wide enough to avoid getting consistently run over.
Used alongside maker rebates and an understanding of how Polymarket’s order book works, reward farming is a meaningful tool in the Polymarket trader’s toolkit.
Related Resources
- Market Making Strategy — Earn the spread by providing two-sided liquidity
- Polymarket Fees Explained — Makers pay $0 + earn rebates
- Fee Calculator — Calculate fees on any trade
- How to Trade on Polymarket — Understand limit orders and the CLOB
- Bonding Strategy — Another capital-intensive approach to Polymarket returns