What Polymarket is and how it works, without the hype

The idea in one sentence

Polymarket is a market where people buy and sell contracts on the outcome of an event. Each contract pays 1 dollar if the event happens and 0 if it does not. Because the price moves between 0 and 1 according to what people are willing to pay, that price works as a probability: if the “Yes” of a market trades at 0.62, the market is saying that outcome has a 62% chance.

It is not a poll and not a traditional bookmaker. Nobody sets the odds: the price comes from thousands of people putting real money for or against. Polymarket is the best-known example of a wider category; for the full picture, read what prediction markets are.

How it works under the hood

• Yes / No contracts. Every market has at least two outcomes. Buying “Yes” at 0.40 means you win 0.60 per contract if it happens and lose 0.40 if it does not. Buying “No” is the mirror trade.
• You can sell before it ends. No need to wait for the result. If you bought at 0.40 and the price rises to 0.70, you can sell and keep the difference.
• Your balance is pUSD, a stablecoin on Polygon. You deposit USDC (or USDC.e) and Polymarket converts it automatically into pUSD, its internal currency. When you withdraw, pUSD turns back into USDC. Polymarket does not take naira, rand or pesos directly: you buy USDC on an exchange and transfer it.
• Makers and takers. Whoever places an order in the book and waits is a “maker” and pays no fee. Whoever fills an existing order is a “taker” and pays a fee that depends on the market category. The fees guide covers it in detail.

A worked example

Say you buy 100 “Yes” contracts at 0.50 in a football market by filling an order already in the book (so you are the taker).

Item	Amount
Cost of 100 contracts at 0.50	50 USDC
Sports taker fee (rate 0.05)	1.25 USDC
Payout if the outcome happens	100 USDC
Payout if it does not	0

The fee follows the official formula: shares × rate × price × (1 − price). Category rates are listed in Polymarket’s documentation, and the fee calculator runs the numbers for any trade.

What kinds of markets exist

Politics (elections, appointments, laws), sports (football, NFL, NBA, tennis, cricket), crypto (Bitcoin price in 15 minutes, this month, this year), economics (interest rates, inflation), culture (awards, releases) and geopolitics. Geopolitics markets carry no fee; elsewhere the taker rate runs from 0.04 (politics, finance, tech) to 0.07 (crypto).

Reading a percentage well takes more than glancing at the headline number. The guide on how to read Polymarket odds explains the gap between the last traded price, the best bid and offer, and volume.

Who decides the outcome

Once the event is over, the result is settled through UMA’s optimistic oracle. Someone proposes an outcome by posting a bond (Polymarket’s help centre mentions 750 USD), which opens a two-hour dispute window. If nobody challenges it, the market settles: winning shares pay 1 USD and losing shares are worth 0. If someone does challenge it, UMA token holders vote on the result.

What counts is the rules text on each market’s page, not the headline. The full process is in our guide on how Polymarket markets resolve and in Polymarket’s help article.

Polymarket betting: is it a sportsbook?

Plenty of people search for “Polymarket betting”, and the difference matters. At a sportsbook, the company sets the odds and takes the other side of your bet. On Polymarket, according to its help centre, you trade against other users: prices come from supply and demand, and you can sell your position before the outcome if there is a buyer.

Polymarket makes money from taker fees, which in turn fund a daily rebate program for makers. It does not win when you lose: it earns when there is activity, in either direction. None of that lowers your risk, and several regulators treat it as unlicensed gambling.

The risks the 60-second video skips

• You can lose everything you put in a contract. If you buy “Yes” and the event does not happen, that contract is worth 0.
• Liquidity matters. In thin markets the price jumps on small amounts and the “probability” is unreliable. Check the volume before trusting a percentage.
• Deposits are crypto. Send USDC on the wrong network, or a token that is not supported, and it can be lost for good. The deposit guide walks through the right network step by step.
• Legality. Regulators have blocked Polymarket in Spain, Argentina, Colombia, India and the Philippines, and Polymarket itself restricts the United States, United Kingdom, France, Germany, Australia, Canada, Brazil and others. The by country section has the current status of each.

Where it works

At the time of writing, Polymarket works without restriction in most of Latin America (Mexico, Peru, Chile, Ecuador, Uruguay and more), and in Nigeria, Kenya, South Africa and the Philippines. Large parts of Europe are restricted, among them France, Germany, Italy, Belgium, Poland and the UK, while the Netherlands and Ireland are close-only on the website. No block is not the same as a local licence, though: in Mexico, for example, Polymarket is not regulated by SEGOB or CNBV. Our overview of where Polymarket is legal goes country by country.

Frequently asked questions

Is Polymarket a bookmaker?

Not in the classic sense. It does not set odds or trade against you: prices come from what users buy and sell, and the platform charges a fee to whoever fills an order. Even so, the regulators that blocked it, such as Spain’s DGOJ, did so on the grounds that it operated without a gambling licence.

How much money do I need to start?

There is no fixed figure we can give: the minimum deposit depends on the network and changes over time. Check the one shown on the deposit screen before you send funds.

What happens if I sell before the event ends?

You get the price you sell at in that moment, minus the fee if you are the taker. It can be more or less than you paid, and you do not have to wait for resolution.