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Polymarket vs PredictIt: which is better in 2026?

Polymarket and PredictIt are fundamentally different animals. PredictIt is an academic research platform with $850 position caps and a narrow US-political focus. Polymarket is a liquid global exchange with no caps and broad market coverage. Here's the full comparison.

Prediction Markets 101 editorial team Updated April 16, 2026 6 min read

What is PredictIt?

PredictIt is a prediction market run by Victoria University of Wellington (New Zealand) under a 2014 CFTC no-action letter. The letter allowed the platform to operate without full SEF or DCM registration, on the condition that it limit market size, restrict trader position sizes, and operate as academic research.

Its primary audience has always been US political traders, drawn by its legal availability and integration with electoral analysis.

The no-action letter caveats

The CFTC's 2014 letter imposed specific constraints:

  • $850 per-market position cap per trader
  • 5,000-trader cap per market
  • Academic research framing — all markets must have educational value
  • 10% fee on withdrawals (profits) — reducing effective yield

These constraints intentionally limit PredictIt to small-scale trading. You cannot build a serious position on PredictIt the way you can on Polymarket or Kalshi.

The 2022 no-action revocation

In 2022, the CFTC revoked PredictIt's no-action letter and ordered markets closed. PredictIt challenged this; the matter went through federal court. PredictIt continues operating under a court-imposed stay, but its future remains unclear. New user signups have been restricted at times.

For most US users asking "Polymarket vs PredictIt" in 2026, the better question is "Kalshi vs Polymarket" — see Polymarket vs Kalshi.

Side-by-side comparison

Regulation

  • PredictIt: Operating under a contested CFTC no-action letter. Legal status is unclear, with ongoing litigation.
  • Polymarket: Not registered with any US regulator; blocks US IPs.

Market size

  • PredictIt: $850 cap per position. Maximum any user can deploy in one market.
  • Polymarket: No cap. Professional traders have run eight-figure positions on flagship markets.

Market universe

  • PredictIt: Narrowly US political (Congress, presidency, primaries, confirmations).
  • Polymarket: Politics (global), sports, crypto, entertainment, economics, science, weather.

Fees

  • PredictIt: 5% on each trade + 10% on withdrawal (profits only).
  • Polymarket: Low per-trade fee (schedule added late 2025; historically 0%), plus spread and ~$0.01 Polygon gas.

Liquidity

  • PredictIt: Limited by the position caps. Major markets have 5,000+ traders; depth is constrained.
  • Polymarket: Much deeper. Billions in cumulative volume.

UX

  • PredictIt: Dated. Web-only, limited mobile. No API.
  • Polymarket: Modern. Web, iOS, Android, public API.

US resident access

  • PredictIt: Yes (with registration restrictions during legal uncertainty).
  • Polymarket: No (IP-blocked).

Tax

  • PredictIt: Issues 1099-MISC for winnings.
  • Polymarket: No tax form issued.

When PredictIt makes sense

PredictIt's niche has always been small-scale US political trading by legally-compliant US residents. If you want to:

  • Trade a political market for a small amount ($100–$500)
  • Be in compliance with US regulations
  • Engage specifically with US political markets
  • Get a 1099 for tax reporting

...PredictIt was historically a reasonable choice. As of 2026, Kalshi has largely supplanted this niche by offering CFTC-regulated political markets without position caps.

When PredictIt doesn't make sense

  • Serious trading. $850 cap limits sophisticated strategies.
  • Non-political markets. PredictIt doesn't cover sports, crypto, entertainment, economics.
  • Non-US users. PredictIt is US-focused; non-US users are better served elsewhere.
  • Professional or quantitative trading. No API, no depth, no automation.
  • Future-proofing. PredictIt's legal status is ongoing. Kalshi's CFTC DCM status is more robust.

Polymarket's advantages

Polymarket outclasses PredictIt on essentially every axis except US legality:

  • 10× broader market universe
  • No position caps
  • Low per-trade fees (vs PredictIt's 5% + 10%)
  • Modern UX
  • Public API for automation
  • Deeper liquidity
  • Faster resolution (2-hour optimistic oracle dispute window, typically auto-resolves)

The one thing Polymarket doesn't offer US users is legality. For non-US users, Polymarket is straightforwardly better than PredictIt on every relevant metric.

What about Kalshi?

For US users considering PredictIt, Kalshi is almost always the better option:

  • CFTC-regulated DCM (not a contested no-action letter)
  • No position caps
  • Lower effective fees (few cents per contract, no 10% withdrawal fee)
  • Broader markets (economics, weather, sports in addition to politics)
  • 1099 tax reporting
  • Legal in all 50 states

See What is Kalshi? and How to sign up for Kalshi.

Historical context: why PredictIt mattered

From 2014–2022, PredictIt was the only CFTC-sanctioned prediction market in the US. Academic researchers, journalists, and political forecasters used it as the reference US-legal market. Its prices fed into FiveThirtyEight's aggregation and major media coverage.

The 2022 no-action revocation, 2024 Kalshi court win, and broader CFTC framework evolution reshaped the landscape. PredictIt's 2014–2022 role has been taken over by Kalshi, which operates under a more robust regulatory designation and doesn't have PredictIt's structural constraints.

PredictIt isn't dead — it still operates and has loyal users — but it's no longer the default choice for US political prediction markets.

Should you sign up for PredictIt in 2026?

Probably not, unless:

  • You specifically want the low-stakes, educational-framing experience
  • You have an existing PredictIt account and prefer continuity
  • You trade US political markets at very small size and prefer PredictIt's community

For almost all other use cases, Kalshi (for US residents) or Polymarket (for non-US residents) is the better option.

FAQ

Frequently asked questions

Is PredictIt still operating?+

Yes, but under legal uncertainty. A 2022 CFTC attempt to shut it down is being litigated. PredictIt continues to accept existing users; new registrations have been restricted at times.

Why is there an $850 cap?+

It's a condition of PredictIt's CFTC no-action letter. Designed to cap the platform's economic significance and justify its academic-research treatment.

Is PredictIt more accurate than Polymarket?+

Historically, Polymarket's prices have tracked PredictIt's closely on overlap markets. Polymarket's larger liquidity arguably makes its prices more reliable for major events. Both have beaten polls.

Can I trade on both PredictIt and Polymarket?+

Technically yes if you're outside the US. US users can use PredictIt but Polymarket is blocked. US users wanting prediction market exposure should use Kalshi.

What happens to my PredictIt funds if it shuts down?+

Customer funds are held in segregated accounts. In the worst case (orderly wind-down), funds would be returned. In a disorderly scenario, there could be delays. This is one of the reasons PredictIt is less resilient than Kalshi's CFTC-regulated custody.

Is there a PredictIt alternative for non-political markets?+

PredictIt is politics-only. For sports, crypto, or entertainment markets, you need Polymarket (globally) or Kalshi (US). Manifold Markets offers play-money markets across categories.

Does PredictIt have an API?+

No public API. Some unofficial scraper tools exist. Polymarket and Kalshi both have official APIs for algorithmic traders.

Which has better political market liquidity: PredictIt or Polymarket?+

Polymarket has substantially deeper political markets. The 2024 US election saw $3.6B on Polymarket vs maybe a few million on PredictIt due to position caps.

Related reading

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Polymarket vs Kalshi: the definitive comparison

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What is a prediction market? The complete primer

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