Yes. In the United States, money you make on Polymarket is generally taxable, and you have to report it yourself even though Polymarket does not send you a tax form. This guide explains how polymarket taxes usually work, why there is no 1099, what records to keep, and where the rules are still unsettled.
Read this first. This article is general information, not tax or legal advice. Prediction market taxation is unsettled, the right answer depends on your own facts, and rules differ by country and by year. Use this to understand the questions, then talk to a qualified tax professional about your specific situation before you file.
Are Polymarket winnings taxable in the US?
In general, yes. The US tax code counts income from whatever source it comes from unless a specific rule excludes it, and there is no exclusion for prediction market profit. So a winning position on Polymarket is generally taxable income to a US person, the same as most other gains. It does not matter that the platform is crypto based, that it settles in USDC, or that you never received a form. Tax follows the income, not the paperwork.
The part that trips people up is not whether tax is owed. It is how the gain gets classified and reported, because the IRS has not published guidance built specifically for prediction market contracts. That gap is real, and it is why two honest tax preparers can take different positions on the same trades. More on that below.
Does Polymarket issue a 1099?
No. The international Polymarket app does not collect the identifiers a US exchange would need to file a 1099, such as your Social Security number and mailing address. Without those, it cannot issue a 1099-B, a 1099-K, a 1099-DA, or a W-2G, and in practice it issues no tax forms at all. You will not get a year-end summary in the mail.
This is the biggest misconception in the whole topic. No 1099 does not mean no tax. It simply means the reporting job is entirely yours. You are the one who has to reconstruct your trade history, work out your cost basis, and report the result. The absence of a form removes the platform's paperwork, not your obligation.
It also does not mean the activity is invisible. Polymarket trades settle on the Polygon blockchain, which is public and permanent. A determined examiner can follow on-chain records, and Form 1040 asks a direct question about digital asset activity that you are expected to answer honestly. Reporting is the safe and correct path.
The regulated US route vs crypto settlement
There are really two different experiences here, and they are taxed with different amounts of help.
The regulated route is a CFTC-regulated US venue. Kalshi is a CFTC-regulated exchange that verifies your identity, funds in US dollars from a bank, and provides some tax documentation, though not always a complete Form 1099-B covering every trade. Polymarket also operates a separate CFTC-regulated venue for US residents, Polymarket US, built on the QCX acquisition, with KYC and dollar funding. On these venues you get more built-in records, and in some cases a form, which makes filing simpler. Polymarket is not banned in the US on this route. For the legal picture, see our guide on whether Polymarket is legal in the US.
The crypto settlement route is the international Polymarket app on Polygon, trading in USDC. Here there is no KYC on the app, no form, and no help. Every number on your return comes from your own records or from an on-chain export. Same underlying tax principle, far more work, and more room for error if you have not tracked things as you go.
How Polymarket gains could be classified
Because the IRS has not addressed prediction market contracts directly, tax professionals reach for existing frameworks and argue for the best fit. The four you will hear about are below. Do not treat this as a menu you get to pick from freely. The correct position depends on your facts, and it is a call to make with an advisor.
| Framework | How it might apply | Loss treatment |
|---|---|---|
| Capital gains | Contracts treated as property, with gain or loss on each disposal, split into short-term and long-term | Capital losses offset capital gains, then up to $3,000 against ordinary income per year, with the rest carried forward |
| Ordinary income | Net profit reported as other income, often on Schedule 1 | Generally netted against the same activity, depending on how it is characterized |
| Gambling income | Winnings treated as wagering income under the gambling rules | For the 2026 tax year, gambling loss deductions are capped at 90% of winnings under the 2025 One Big Beautiful Bill Act, so break-even years can still show taxable income |
| Section 1256 | Mark to market, taxed on a 60/40 long-term and short-term blend, mainly argued for contracts on a regulated exchange | Special loss carryback rules apply, but eligibility for an unregulated venue is doubtful |
The practical takeaway is that classification changes the math, sometimes a lot. Under the gambling framework, that 90% loss cap for 2026 means someone who wins $20,000 and loses $20,000, a true break-even year, could still face tax on a slice of the winnings because only 90% of losses are deductible. That is a real change to plan around, not a detail. It is one more reason to get a professional view before you file.
Cost basis and record-keeping
Whatever framework you land on, you cannot report accurately without clean records, and this is where most Polymarket traders fall short. One point matters more than any other: the IRS treats USDC as property, not cash. Buying a position, selling it, and receiving a payout are each events measured in US dollars at the time they happen, and converting USDC to dollars later can be its own taxable event. Because USDC usually sits near one dollar, these values are often small, but they are still real and you are expected to track them.
Here is a checklist of what to capture for every position. Build this as you trade. Reconstructing it in April from memory is painful and error prone.
| Record to keep | What to capture |
|---|---|
| Entry date and cost | When you bought each position and the USDC amount you paid |
| Exit or settlement date | When you sold or the market resolved, and the USDC you received |
| US dollar value at each event | The USD value of the USDC at the moment of each buy, sell, or payout |
| Cost basis and proceeds | Basis per lot and proceeds per disposal, using a consistent method such as FIFO or specific identification |
| Gain or loss | The realized result on each position, kept running across the year |
| Wallet addresses | Every Polygon wallet you used, so the history is complete |
| USDC conversions | Any swap of USDC to US dollars or another asset, which can be a separate taxable event |
Good records start with good data. SmartX is an independent AI trading terminal for prediction markets: smart-money wallet tracking, live signals, a market radar, and pro charts in one place, at a flat 0.5% fee, Global and beyond. Its exportable trade history and clean, itemized records make it far easier to hand your accountant the dated log they will ask for, instead of screenshots and guesswork.
Open SmartX →Non-US readers: check your local rules
Everything above is about US federal tax. If you live somewhere else, your own country decides how these gains are treated, and the answer varies widely. Some countries tax them as capital gains, some as ordinary income, some as gambling, and a few treat certain gambling winnings as tax free. On top of that, US-source rules and tax treaties can sometimes come into play depending on how the contracts are characterized and where the activity is sourced.
Do not assume that a crypto venue with no forms means there is nothing to report where you live. The safe move is the same everywhere: keep the records described above, then confirm the treatment with a tax professional in your own jurisdiction who can read your local rules and any relevant treaty.
Common misconceptions
A few beliefs cause most of the trouble. Clearing them up early saves pain later.
"No 1099 means no tax." False. Tax is owed on the income, and the missing form only shifts the reporting work onto you.
"It is crypto and offshore, so it is invisible." The Polygon blockchain is public and permanent, and Form 1040 asks about digital asset activity directly. Non-reporting is a risk, not a strategy.
"USDC is just cash, so moving it is not taxable." The IRS treats USDC as property. Realized gains can be taxable even if you never move dollars to a bank.
"My losses always cancel my wins." Not automatically. Capital losses face an annual limit against ordinary income, and under the gambling framework the 2026 loss cap means even a break-even year can be taxable.
"It is obviously capital gains." Maybe, maybe not. The classification is genuinely unsettled, which is exactly why a professional view is worth having.
Practical steps to keep clean records
You do not need to be an accountant to stay out of trouble. You need a habit.
First, log every trade as it happens, using the checklist above, in a spreadsheet or a tool that exports history. Second, record the US dollar value at each event, not just the USDC amount. Third, note the fees you paid, since they affect your basis and proceeds. Fourth, keep a list of every wallet you used, so nothing goes missing. Fifth, save your on-chain history and any exports at year end, before you forget which wallet did what. Sixth, when in doubt about classification or the 2026 loss rules, take your clean records to a qualified tax professional and let them make the call. If you also trade on regulated venues, pull their statements too, and read our Polymarket fees explained guide so your basis and proceeds line up. New to the platform itself? Start with how to use Polymarket.
One more time, because it matters: this is general information, not tax or legal advice. The rules here are unsettled and they change. Treat everything above as a map of the questions to ask, then get advice tailored to you before you file.
Frequently asked questions
Do you pay taxes on Polymarket winnings?
In the US, yes. Money you make on Polymarket is generally taxable income, because the tax code counts income from whatever source it comes from. You owe tax on your profit whether or not you receive a form, and the reporting burden is on you. This is general information, not tax advice, so confirm your own situation with a professional.
Does Polymarket send a 1099?
No. The international Polymarket app does not collect the identifiers, such as a Social Security number, that a US exchange would need to issue a 1099-B, 1099-K or W-2G, so it issues no tax forms. That does not remove your obligation. You self-report from your own records.
Is Polymarket taxed as gambling or as capital gains?
It is not settled. The IRS has not published guidance specific to prediction market contracts, so tax professionals take different positions, including capital gains, ordinary income, gambling income, or Section 1256. The right treatment depends on the facts, and it is a judgment call to make with a qualified advisor.
Do I owe tax if I only moved USDC and never cashed out to my bank?
Possibly. The IRS treats USDC as property, not cash, so realized gains on your positions can be taxable when a market resolves or you sell, even if you never convert USDC to dollars in a bank. Converting USDC to US dollars can be a separate event. A professional can confirm how this applies to you.
What records should I keep for Polymarket taxes?
Keep the date and USDC cost of each position you buy, the date and USDC proceeds when you sell or a market resolves, the US dollar value at each event, your cost basis and proceeds per lot, the resulting gain or loss, every wallet address you used, and any USDC conversions. Clean, dated records are what your preparer will ask for.
Do non-US users pay taxes on Polymarket?
That depends on where you live. Most countries tax investment or gambling gains in some form, and some US-source rules and tax treaties can also apply. Check your local rules and speak with a tax professional in your own country. Do not assume that a crypto venue means no tax.
Can the IRS see my Polymarket activity if there is no form?
Polymarket trades settle on the Polygon blockchain, which is public and permanent. No 1099 does not mean the activity is invisible or that tax is not owed. Answer the digital asset question on Form 1040 accurately and report your gains.