MetaMask added prediction markets to its mobile wallet in early December 2025, becoming the first self-custodial crypto wallet to bake Polymarket directly into the app. Same markets, same outcomes, same Polymarket order book. On paper, it’s the easier way to trade predictions. But look at the fee structure, and the picture changes fast.
MetaMask Charges 4% Per Trade
Every trade routed through MetaMask Mobile costs 4%, split between MetaMask and Polymarket. Deposits, withdrawals, and cashouts stay free. Just the trade itself.
The integration launched as part of an exclusive partnership first teased back in October. Users fund positions with any token on Ethereum or compatible Layer 2s, and six tokens can be traded directly from the wallet. Every prediction earns two MetaMask Rewards points per dollar traded, feeding into the broader rewards program that ties to the company’s planned token launch.
MetaMask’s VP of product strategy, Ajay Mittal, said the company benchmarked pricing against both prediction markets and the wider sports-betting industry. A flat fee, he argued, is the clearest, most predictable structure for users.
That holds up for someone treating predictions like the occasional sports parlay. For active traders, 4% per round trip eats into returns fast.
Polymarket Direct Stays Free
Trading on Polymarket through its website or mobile app costs nothing. Free deposits, free trades, free withdrawals. The platform officially re-entered the US market last month and launched its own mobile app at roughly the same time, neutralising the main argument for using MetaMask’s version.
The trade-off is setup friction. Direct Polymarket users connect a wallet, sign transactions, and bounce between the platform and their funding source. MetaMask collapses all of that into two taps inside the wallet they already use.
“Using prediction markets on mobile today is painful,” MetaMask’s senior director of product, Mike Lwin, told The Defiant. The 4% is essentially a convenience tax for skipping the friction.
What It Means for Traders
MetaMask is going after users who already trust the wallet and want predictions added to the same dashboard as their tokens, swaps, and perpetuals. Casual frequency, larger trade sizes, and rewards points stacked across the ecosystem.
Polymarket direct is for the trader who clicks in and out of positions all day, follows event probabilities like markets, and counts every basis point. They’ll keep going to the source.
Neither is wrong. The call comes down to how often you trade and how much friction you tolerate. A few positions a month on elections, sports, or crypto headlines? MetaMask’s setup is genuinely faster. Trading the news cycle live? The math doesn’t work.
The bigger picture matters too. This is one piece of a major MetaMask push that already includes perpetual futures via Hyperliquid, US stock trading on names like Nvidia and Tesla, the seasonal Rewards program, and an upcoming native token tied to Consensys, preparing for a potential IPO. Prediction markets are the latest plank, not a one-off feature.
The space is getting crowded fast. Kalshi, the CFTC-approved prediction market and Polymarket’s biggest regulated rival, just signed CNN as its official prediction markets partner and closed a $1 billion round at an $11 billion valuation. Opinion on BNB Chain briefly outpaced both Kalshi and Polymarket in weekly volume last month. Coinbase and Fanatics run their own event-trading platforms now. The MetaMask deal is one move in a much bigger reshuffle.
For a live look at how the major prediction market platforms compare across Polymarket, Kalshi, Manifold, and the rest, we have that covered too.
