What Robinhood event contracts actually cost
The fee structure
Robinhood charges a per-contract commission on event-contract trades, on top of the exchange fee that Kalshi charges on the underlying market. Both are small per contract — on the order of a cent each — and both scale linearly with the number of contracts.
Fee schedules change. Verify the current numbers in Robinhood's published schedule and Kalshi's fee documentation before sizing a strategy around them; this guide is about the shape of the costs, not a live quote.
Why small fees matter more here
Event contracts are priced in cents and often traded in size, so a per-contract fee that sounds trivial compounds fast. Two cents of combined fees on a 50-cent contract is 4% round-trip friction — more than the edge in most strategies.
The interactive fee calculator on this site shows the exchange-side fee for any price and size. Compare venues on total round-trip cost, not headline commission.
Robinhood vs Kalshi direct on cost
Trading the same contract direct on Kalshi removes Robinhood's per-contract commission; you pay the exchange fee alone. For occasional trades the difference is pocket change. For active traders running thousands of contracts a month, it is one of the largest controllable costs in the strategy.
Kalshi's taker fee is also price-dependent — it peaks at 50-cent contracts and shrinks toward the extremes — so the venue comparison shifts with what you trade. Run your actual mix through the calculator before deciding.
FAQ
Does Robinhood charge commission on event contracts?
Yes — a per-contract commission on top of the underlying exchange fee. The amounts are small per contract but scale linearly, so active traders should check the current published schedule.
Are Kalshi's fees the same on Robinhood as on Kalshi direct?
The exchange fee is Kalshi's either way. Trading direct removes Robinhood's commission layer, which is the entire cost difference on the same contract.
How does the fee compare with sportsbook vig?
A standard -110 sportsbook line embeds roughly 4.5% of implied probability as margin. Exchange fees on event contracts are typically lower and transparent, which is the core economic argument for prediction markets over sportsbooks.