Polymarket taxes explained: what to track before you file

Polymarket does not withhold tax, but that does not make your profits tax-free. In most countries, trading gains are usually treated as taxable income, and reporting them is your job. This guide covers the general principles so you arrive prepared when you talk to an accountant. It gives no rates or country rules, because each country takes its own approach and those rules change.

The essentials

• No withholding does not mean no tax. The duty to report usually falls on you.
• Keep records of every deposit, trade and withdrawal from day one.
• Convert to your local currency using an exchange rate you can justify.
• Separate realised gains from open positions. Closing at a profit is not the same as holding a position that has gone up.
• See a local accountant. It is the only way to know how your country’s law applies to you.

This guide is for information only and is not tax advice.

Polymarket taxes: why they apply even without withholding

Polymarket runs on pUSD and USDC on the Polygon network and does not withhold tax: nothing is deducted from your winnings. Many people take that to mean there is nothing to report, which is a common mistake.

As a general rule, tax authorities tax income based on where you live, not where the platform is. If you make a profit, you will usually need to report it, even if it stays in crypto and never reaches your bank account. How that profit is classified (as gambling, as a capital gain, or as another kind of income) depends on the country.

How to keep records of your trades

Good records save you hours and arguments with your accountant. At a minimum, note:

Item	Why it matters
Date and amount of each deposit	Your entry cost
Exchange and fee when buying USDC	May be a deductible cost, depending on the country
Market, outcome, shares and price of each trade	Lets you work out each gain or loss
Polymarket fee on each taker trade	Part of the trade’s cost
Date and amount of each withdrawal	Shows when money left the platform
Exchange rate used on each date	Needed to convert to local currency
Sale of USDC for local currency on the exchange	The point where money returns to your currency

Keep screenshots or exports of your Polymarket and exchange history. Trade fees follow the official formula explained in Polymarket fees.

Converting to your local currency

Your trades are in digital dollars, but your return is in naira, rand, pesos or euros. You need a consistent conversion method:

• Use an exchange-rate source your tax authority accepts. Your accountant will know which.
• Apply the rate for the date of each transaction, unless your country prescribes another method.
• When you sell USDC on a local exchange there may also be a currency gain or loss, which some countries treat separately.

The USDC-to-local-currency step is covered in how to withdraw from Polymarket.

Realised gains vs open positions

A realised gain happens when you sell your shares or when the market resolves. If you bought “Yes” at 0.40 and the market resolves your way, each share pays 1 USD: the difference is your gain. If you sell earlier, the gain is the sale price minus the purchase price, less fees.

An open position that has risen in price is not yet a concrete gain: it can fall back, or the market can resolve against you and pay 0. Many tax systems focus on realised gains, but not all in the same way. Ask.

Losses count too

If a position resolves against you, your shares are worth 0. Record those losses as carefully as your gains. Depending on the country, they may or may not offset gains; your accountant will tell you.

Every country has its own rules

Countries treat this kind of income differently. Mexico, Chile, Peru, Spain and Argentina, for example, each take their own approach, and the same applies to Nigeria, Kenya, South Africa and the Philippines. What changes is how the income is classified, the rates, possible deductions, when it must be reported and how crypto gains are handled. We give no country figures or rules because we cannot vouch for them and they change often. Confirm them with a professional.

Beyond tax, check Polymarket’s legal status where you live: in Spain, Argentina, Colombia, India and the Philippines, for instance, authorities have ordered blocks. See where Polymarket is legal and the country pages for Nigeria, Kenya, South Africa and the Philippines.

How to prepare for your accountant

Bring to the meeting:

1. Your full record of deposits, trades and withdrawals.
2. The exported history from Polymarket and your exchange.
3. The exchange rates you used.
4. A short explanation of how Polymarket works: contracts that pay 1 USD if the outcome happens and 0 if not. You can share our guide on what Polymarket is.

Ask how the income is classified in your country, when it counts as earned, whether losses can be offset and which documents you must keep.

Frequently asked questions

Do you pay taxes on Polymarket winnings?

In most countries, profits are usually treated as taxable income, even though Polymarket withholds nothing. Classification and rates depend on where you are tax resident. Confirm with a local accountant.

Does Polymarket withhold tax?

No. Polymarket does not deduct tax from your winnings. That does not change your duty to report: the responsibility usually sits with you, so keep your records up to date in case your tax authority asks.

Do I have to report a position I have not closed?

It depends on the country. Many systems tax realised gains, when you sell or the market resolves, but not all in the same way. Ask your accountant.

What tax rate applies to Polymarket profits?

We give no rates because each country has its own approach and the rules change. Mexico, Chile, Peru, Spain and Argentina, among others, treat this income differently. A local accountant can give you the right figure.