Kalshi vs sportsbooks in California
Why Kalshi is legal in California when sportsbooks are not
California voters rejected both sports-betting ballot measures in 2022, and no online sportsbook is licensed in the state. Event contracts sit on a different map: Kalshi is a CFTC-regulated event-contracts exchange, and this site tracks its availability state by state rather than assuming the sportsbook map applies. The table below is that row for California, with the date each status was last verified against the venue's own terms.
Current status and notes: prediction markets in California.
Event-contract venues in California
| Venue | Status in California | Taker fee | Last verified |
|---|---|---|---|
| Kalshi | Available in California | 7% × price × (1 − price) per contract, rounded up per order; general schedule, not re-verified | 2026-09-18 |
| Robinhood | Available in California | Not modelled on this site | 2026-09-18 |
| Polymarket US | Limited in California | Not modelled on this site | 2026-09-18 |
| Polymarket | Not available in California | Up to 7% by category (measured: Sports 5%, Zero 0%, Crypto 7%) | 2026-09-21 |
What the fees look like
Kalshi's taker fee is its general schedule's rate applied to price times one-minus-price per contract, rounded up to the cent per order, so it peaks on 50-cent contracts and shrinks toward the extremes. A standard -110 sportsbook line embeds roughly 4.5% of implied probability as margin; exchange fees on event contracts are typically lower and shown on the ticket rather than inside the odds. The calculator below prices the fee at your stake, and the rate it uses is carried from a previously read schedule, not re-verified — see what we cannot verify.
| Contract price | Contracts $100 buys | Taker fee | Fee as share of stake |
|---|---|---|---|
| 30¢ | 333 | $4.90 | 4.9% |
| 50¢ | 200 | $3.50 | 3.5% |
| 70¢ | 143 | $2.10 | 2.1% |
On $100 at 50¢ you pay $3.50 in fees on Kalshi
1.75¢ per contract · 200 contracts
On $100 at 50¢ you pay $2.50 in fees on Polymarket US
1.25¢ per contract · 200 contracts
Polymarket rate read from the catalog for sports_fees_v3 (15,702 markets in a sample of 20,000 rows drawn from 580,600 in the archive). Kalshi's rate is its published general schedule; the PDF has been rate-limiting fetches, so it is documented rather than verified.
Exchange-side taker fees per each venue's published formula (rate × contracts × price × (1 − price)); contracts = stake ÷ price, rounded down to whole contracts. Fees peak at 50¢ and shrink toward the extremes. Most quoted cross-venue “arbs” are negative-EV after these fees; the taker-fee breakeven on a Kalshi/Polymarket pair is roughly 3.5–4¢.
Questions people ask
Is Kalshi available in California?
Kalshi is available in California on this site's state matrix, last verified 2026-09-18: CFTC-regulated exchange; event contracts offered to state residents.
Is there a legal online sportsbook in California?
No. California voters rejected both sports-betting ballot measures in 2022, and no online sportsbook is licensed in the state.
What does Kalshi charge per trade?
Kalshi's general taker rate is 7% of price times one-minus-price per contract, rounded up to the cent per order: that is 1.75¢ per contract at 50 cents, or $3.50 on a $100 stake at that price. The published schedule has returned HTTP 429 since 2026-09-21, so the rate is documented, not re-verified.
Which event-contract venues does this site track in California?
Kalshi and Robinhood are marked available in California; Polymarket US is marked limited; Polymarket is marked not available. Statuses were last verified against venue terms on 2026-09-21.
What we cannot verify
Kalshi's 7% general taker rate is carried from a previously read fee schedule: kalshi.com/docs/kalshi-fee-schedule.pdf has returned HTTP 429 to every fetch since 2026-09-21, so the rate is documented, not re-verified against the current document. The venue statuses in the table are an editorial seed compiled from public reporting, last verified against venue terms on 2026-09-21; they change with court rulings and state enforcement actions, and a status has not been re-checked since its date. The sportsbook side - which operators are licensed in California - is stated from this site's own legality write-up and has not been re-verified against the state regulator's licensee list.
Sources
Try Kalshi in California
No verified referral code is live right now — sign up directly at Kalshi.
Disclosure: promo codes on this site are referral offers when shown. If you sign up through them, the operator may pay this site a referral credit at no extra cost to you. Terms and eligibility are set by the venue and can change.