You tap a prediction market inside a wallet, choose YES, and confirm. The interface makes that feel like one action. Underneath, it may involve a wallet, a market operator, a collateral contract, an exchange account, a data source and a separate payout transfer.
Those roles matter most when you want to withdraw, a market resolves unexpectedly, or the app says your position is worth money but offers no buyer. “In my wallet” can describe where you started—not where your trading balance sits or who controls the outcome decision.
This guide follows the money from the first tap to the final withdrawal. It compares international Polymarket with Kalshi’s US exchange route in Phantom, then explains why Phantom’s international prediction product must be treated as a different integration.
The five steps hidden behind one tap
- Interface: the app displays markets and lets you submit an order.
- Account and position: an exchange account or a wallet-linked trading account records your contracts.
- Collateral: cash or tokens back the position. While a position is open, this value is committed; it is not necessarily cash you can withdraw.
- Resolution: a named operator or oracle applies the market’s written rules to evidence from a source.
- Settlement and withdrawal: the winning position is converted to a balance, then a separate transfer sends that balance to your wallet or bank.
An event ending, a market resolving, a position settling and money arriving are four different moments.
International Polymarket: wallet control, locked collateral, onchain redemption
Polymarket’s international website is a separate product from its US app. Its help center says the international product is for users outside the United States, subject to geographic restrictions; the US app has separate accounts and support. The current restricted-country page lists Poland as close-only: users may view markets and close existing positions, but may not open new ones. Restrictions can change, so check the live eligibility screen and local rules before using any product. Product split · Geographic restrictions
For the international product, Polymarket describes its wallets as non-custodial: it says it does not take possession of users’ USDC and that users control access through their wallet credentials. That answers who controls the wallet, not whether every dollar is freely transferable while a trade is open. A position is represented by outcome shares, and its collateral is committed to the market’s contract mechanics until it is sold or redeemed. Treat “wallet custody” and “market collateral” as two different layers. Polymarket’s custody explanation
As of its 2026 exchange-upgrade documentation, Polymarket’s trading collateral is pUSD, a Polygon token backed 1:1 by USDC, with the backing enforced by a smart contract. This replaced the previous USDC.e collateral on the upgraded exchange. Do not assume an old screenshot or article naming USDC.e describes a current position. Polymarket USD and exchange upgrade
In a standard binary resolution, winning shares can be redeemed for $1 each and losing shares become worthless. The rules also allow exceptional outcomes: an Unknown/50-50 resolution pays $0.50 to each side. Before that point, you can try to sell your position, but the price depends on available buyers. A displayed mark or estimated value is not a promise that you can exit at that price. If you choose to withdraw, Polymarket’s help guide describes a separate action: select the recipient address, token and network, then confirm the transfer. Resolution mechanics · Withdrawals
Who decides on Polymarket?
The market’s written rules come first. They define the question, the eligible evidence and the resolution source. For prediction markets, Polymarket’s current developer documentation names UMA’s Optimistic Oracle as the resolution system. A proposer posts a bond—currently documented as typically $750 pUSD—and submits an outcome. Anyone can challenge it during a two-hour window. A first challenge starts a new proposal round; only if that second proposal is also disputed does the case escalate to UMA’s Data Verification Mechanism (DVM) for a token-holder vote. The same docs describe Chainlink TWAP for a separate category of short-duration up/down markets, so “all Polymarket markets resolve through UMA” is too broad. Resolution sources and dispute flow
The practical point: an oracle process is a defined way to apply the market’s rules, not a guarantee that every ambiguous question has an obvious answer. Read the market’s exact criteria before buying.
Kalshi inside Phantom US: the app is the front door, Kalshi holds the account
On 23 October 2026, Phantom announced a phased rollout of US prediction markets through its first US integration with Kalshi. Phantom’s current US help guide spells out the division of work: users complete Kalshi identity verification, Kalshi provides and operates the markets, executes trades, determines outcomes and payouts, while Phantom supplies the in-app experience and facilitates fund movement. Access is limited to eligible users in supported US jurisdictions; the rollout announcement does not establish adoption or nationwide availability. Rollout announcement · Phantom US guide
Here, Phantom’s self-custody wallet and a Kalshi trading account are not the same account. When you buy through the US route, funds go from the selected Phantom payment source to Kalshi. A linked Kalshi account does not merge balances: Phantom says the prediction funds used through Phantom are not visible in the user’s regular Kalshi app balance, and funds held in the regular Kalshi app are not included in Phantom Cash. After a sale or a winning settlement, proceeds become available at Kalshi first; Phantom then initiates their return to the user’s Cash balance through Stripe. A sale or win appearing in History can therefore precede the arrival of cash. Account linking and verification · Fund movement and settlement
Kalshi—not Phantom—determines the outcome using each contract’s terms and stated source. Kalshi says determination can take from about an hour to more than twelve hours after market close, depending on when it receives the source data. If you think the result is wrong, Phantom directs US users to review the market rules and contact Kalshi support. This is a support route, not an onchain token-holder vote. Kalshi on outcomes · Phantom dispute instructions
Kalshi is listed by the CFTC as a designated contract market. CFTC-filed clearing rules also describe segregation of participant collateral from clearing-house property. Those are specific regulatory and clearing-layer facts, not a blanket guarantee against every loss, processor delay or bank failure. CFTC DCM listing · Kalshi Klear rulebook
Phantom outside the US: World on Solana, with a separate payout path
Phantom’s current help guide says prediction markets outside the United States are powered by World Prediction Markets on Solana. You can fund a position with Phantom Cash or a Solana token. The position is represented by a standard Solana SPL outcome token; Phantom says it supports using these tokens to cash out or claim payouts through its app. A winning payout is credited automatically as CASH to the Phantom account that was active when the market resolved. Selling early is possible only when a buyer and quote are available; a displayed profit does not guarantee that you can sell. Phantom World guide
World supplies the resolution and payout data; Phantom says it does not decide the result. The guide describes a possible challenge period and directs users who believe a market resolved incorrectly to Phantom Support. This differs from the US Kalshi route, where Kalshi holds the trading account and determines outcomes. World guide: dispute and resolution · Regional availability
There is a documentation wrinkle: Phantom’s general product landing page still says the international product is powered by Kalshi via DFlow, and its 1 July disclosures distinguish positions opened before and after 1 June. The newer dedicated trading guide names World for users outside the US. This article follows that current operational guide; check the provider and terms displayed for your own market. Older general product page · Dated product disclosures
A quick checklist before you confirm
- Which legal product and region am I using: Polymarket international, Polymarket US, Kalshi directly, or a Phantom integration?
- Is my balance held in a self-custody wallet, an exchange account, or committed as collateral in a contract?
- What exactly counts as YES, which source is authoritative, and who applies the rules?
- Can I sell before resolution, and is there enough liquidity? Is the displayed value an estimate?
- After a win, what still has to happen before funds reach my wallet or bank?
- Where can I raise a dispute, and what process—not just support channel—can change the result?
The wallet screen is the start of the journey. The market’s rules, the account that holds your trading balance, and the payout route determine where the money actually goes.
Research checked 26 October 2026. Product terms and access rules can change. This is an explanation of platform mechanics, not financial or legal advice.