Are Prediction Markets Legal in Illinois?

Illinois is the most economically interesting prediction-market state in the country in 2026 — not because of legal uncertainty, but because of price. In June 2025, the Illinois General Assembly passed a [per-wager excise tax](https://tax.illinois.gov/) of $0.25 on each of an operator's first 20M wagers in a fiscal year and $0.50 on each wager after that. The tax took effect July 1, 2025. By August 2025, both DraftKings and FanDuel announced they would pass the tax through to IL bettors as a $0.50 surcharge per bet placed in Illinois. The result: Illinois retail bettors are now paying a structural per-wager penalty that does not apply to CFTC-regulated prediction markets.

Kalshi, Robinhood, Polymarket US, OG.com and the other CFTC-regulated platforms operate under federal CFTC oversight and do not pay Illinois state sportsbook taxes. There is no per-wager surcharge. There is no IL sportsbook excise. For IL residents looking to take a position on a sports outcome, the prediction-market alternative is now structurally cheaper per wager than DraftKings or FanDuel for any bet under roughly $25 (where the $0.50 surcharge becomes a smaller percentage of stake). For high-frequency or small-stake bettors, the gap is large and growing.

Illinois Prediction Market Timeline 2025–2026

• March 2025 — Kalshi launches sports event contracts. IL residents have immediate access.
• June 2025 — Illinois General Assembly passes the per-wager excise tax ($0.25 / $0.50 per wager) as part of the FY2026 budget.
• July 1, 2025 — Per-wager tax takes effect.
• August 2025 — DraftKings announces a $0.50 per-bet surcharge on all wagers placed in Illinois. FanDuel matches the surcharge within 48 hours.
• September 2025 — Sportsbook handle in Illinois drops materially as bettors reroute to states without surcharges and to CFTC prediction markets. Reports cite a "double-digit percentage decline" in IL handle YoY.
• November 2025 — Illinois AG Kwame Raoul declines to join AG Campbell's multi-state coalition against Kalshi. The IL Gaming Board has not issued prediction-market-specific guidance.
• April 2026 — Per-wager tax remains in effect. CFTC prediction markets continue to operate in IL with no state-level surcharge.

Why the Illinois Per-Wager Tax Matters for Prediction Markets

Three structural effects:

1. Pricing arbitrage. A $10 bet on DraftKings in Illinois costs $10.50 effectively (10 + $0.50 surcharge). The same expected payoff via a Kalshi event contract costs the contract premium plus Kalshi's per-trade fee — typically materially less than $0.50 on small-stake trades.
2. High-frequency disincentive at sportsbooks. Bettors placing many small wagers (parlays, props, in-play) are penalized most heavily by the surcharge. These bettors are most likely to migrate to per-contract pricing on CFTC platforms.
3. Federal preemption protects the platforms. CFTC-regulated event contracts are federally preempted from state sportsbook taxes. Illinois cannot impose a per-wager surcharge on Kalshi or Polymarket without contradicting the Third Circuit↗'s *Kalshi v. New Jersey* preemption ruling.

What Illinois Residents Can Trade Right Now

CFTC-regulated platforms operate the standard split-product approach in IL:

• Politics, macro, crypto, climate, entertainment, weather: Fully available on Kalshi, Robinhood, Polymarket US, OG.com, Sleeper, Novig, Chalkboard, Rebet.
• Sports event contracts: Available on Kalshi, Robinhood, Polymarket, OG.com, Novig and Chalkboard. Geofenced by DraftKings Predictions, FanDuel Predicts, Fanatics Markets (their parent companies hold IL sportsbook licenses).

Illinois-specific market depth is strongest on Chicago Bears (NFL), Bulls (NBA), Blackhawks (NHL), Cubs and White Sox (MLB), Northwestern and Illinois Fighting Illini (NCAA) contracts.

Best Prediction Market Platforms for IL Residents

Kalshi — Full sports catalog. CFTC Designated Contract Market. No IL state sportsbook tax.

Robinhood — Available statewide. Routes through Kalshi. No IL state sportsbook tax.

Polymarket US — Strong political and macro depth. USDC↗-funded.

OG.com — Available with full sports catalog. Lower per-contract fees than Kalshi.

Novig — Peer-to-peer no-vig sports markets. Available in IL.

Chalkboard — Sports prediction markets. Available in IL.

Sleeper — Fantasy-adjacent prediction props. Available in IL.

Rebet — Available in IL.

DraftKings Predictions / FanDuel Predicts / Fanatics Markets — Not available in IL (voluntary geofencing tied to state sportsbook licenses, which are now subject to the per-wager tax).

Eligibility Checklist for IL Residents

• 18+ on CFTC-regulated platforms (IL state sportsbooks: 21+).
• Government ID + SSN for KYC verification.
• US bank account, debit card, or USDC↗ wallet.

Tax Treatment for IL Residents

• Federal: IRC Section 1256 generally applies (60% long-term / 40% short-term capital gains).
• Illinois state: Flat 4.95% state income tax applies to taxable gains.
• No per-wager state surcharge: This is the key difference vs IL state-licensed sportsbooks.
• Not gambling income: IL Department of Revenue has not issued prediction-market-specific guidance, but federal CFTC classification controls.

Local Sports Angle: Bears, Bulls, Blackhawks, Cubs, White Sox, Fighting Illini

Illinois fans can currently trade event contracts on every Chicago and IL pro and college team on Kalshi, Robinhood, Polymarket and OG.com — without paying the $0.50 per-bet surcharge that applies to DraftKings and FanDuel in Illinois. Super Bowl futures, NBA Finals odds, Stanley Cup futures, World Series odds, college football and college basketball — all available statewide as of April 21, 2026 with no state-level per-wager tax.

What Happens Next

1. Per-wager tax repeal: Unlikely in the FY2027 budget. The tax generated meaningful revenue and is politically protected.
2. DK/FD pulling out of IL: Speculated but unlikely. Both operators have stated they will continue to pay the tax and pass through the surcharge.
3. Continued migration to CFTC platforms: Likely. The pricing gap is structural and will not close absent federal preemption being overturned.
4. AG Raoul posture: Likely unchanged. Without a clear federal court reversal, IL is unlikely to bring its own enforcement action.

Sources

• The Hill: [Lawmakers ramp up fight against sports betting on prediction markets](https://thehill.com/business/5798917-sports-betting-prediction-markets-cftc/)
• Yahoo Finance: [Online Sports Betting Bills Stymied By Prediction Markets](https://www.yahoo.com/news/articles/online-sports-betting-bills-stymied-140537662.html)
• Holland & Knight: [Federal Appeals Court: CFTC Jurisdiction Over Sports Event Contracts](https://www.hklaw.com/en/insights/publications/2026/04/federal-appeals-court-cftc-jurisdiction-over-sports-event-contracts)