Kalshi vs Interactive Brokers:
Standalone Exchange vs Prime Broker
Kalshi is a purpose-built CFTC exchange covering the full prediction market spectrum. Interactive Brokers offers ForecastEx event contracts inside the world's largest electronic brokerage. Both are regulated, but they serve very different traders.
Who should use which?
Prediction markets are your primary focus
- You want sports, weather, or cultural event contracts
- You want the broadest US prediction market category coverage
- You're a retail-to-active trader focused on event contracts
- You don't already have an IBKR account
- You want a simple, dedicated prediction market experience
You're a professional adding event contracts to a portfolio
- You already trade equities, futures, or options via IBKR
- You want political and economic event contracts in your existing workflow
- You want API access without adding another data feed
- You want portfolio margining across asset classes
- You're an institutional or professional-level trader
Full comparison table
| Feature | Kalshi | IBKR (ForecastEx) |
|---|---|---|
| Founded | 2021 | 1978 |
| Type | Standalone prediction market exchange | Prime brokerage with ForecastEx event contracts |
| Regulation | CFTC DCM (prediction market licence) | FINRA/SEC + CFTC (via ForecastEx subsidiary) |
| Settlement | USD (segregated prediction market account) | USD (existing IBKR brokerage account) |
| Event contract fees | 0–7% of net profit | No extra commission: spread only (ForecastEx) |
| Min deposit | $1 | $0 additional for existing IBKR accounts |
| Categories | Politics, Economics, Sports, Weather, Crypto, Culture | Politics, Economics, Financial markets (ForecastEx only) |
| Sports contracts | ✅ | ❌ |
| Weather contracts | ✅ | ❌ |
| API / programmatic | ✅ REST + WebSocket | ✅ IBKR TWS API (full programmatic access) |
| Portfolio margin | ❌ (standalone account) | ✅ Portfolio margining available |
| Multi-asset in one UI | ❌ (prediction markets only) | ✅ Stocks, bonds, futures, options, event contracts |
| International access | US residents primarily | Global: IBKR available in 150+ countries |
| Best for | Dedicated prediction market traders | Institutional/professional traders already using IBKR |
Two layers of regulation
CFTC Designated Contract Market
Kalshi holds a CFTC DCM licence: the most stringent regulatory category for US derivatives exchanges, shared with the CME and CBOE. Customer funds are held at regulated custodians in segregated USD accounts. All markets are approved by Kalshi's CFTC-registered compliance team. The CFTC dropped its enforcement case against Kalshi in May 2025 after Kalshi won a key preliminary injunction in October 2024.
FINRA/SEC broker + CFTC-regulated DCM
Interactive Brokers is regulated by FINRA and the SEC as a broker-dealer. Its event contracts run on ForecastEx, a separate CFTC-registered DCM. When you trade event contracts via IBKR, your trade is cleared through ForecastEx's regulated infrastructure while sitting inside an IBKR brokerage account. Two regulatory layers: both mature and well-capitalized. IBKR's $15B+ in client equity and 45+ years of operation make it the most institutionally credible platform in this comparison.
Common questions
Should serious traders use Kalshi or Interactive Brokers? +
If prediction markets are your primary focus, use Kalshi: it has broader categories and a dedicated interface. If you're primarily an equities or futures trader who wants to add event contracts to an existing IBKR portfolio, use IBKR.
What event contracts does Interactive Brokers offer? +
IBKR offers ForecastEx contracts on US elections, Fed decisions, CPI, unemployment, GDP, and financial market thresholds. No sports, weather, or cultural contracts.
Can I use the IBKR API for event contracts? +
Yes: the standard TWS API supports event contracts alongside other instruments. Kalshi also has its own REST/WebSocket API for those using it exclusively.