Compare exact products, then settlement rules
Kalshi and Polymarket US support a US-dollar contract research path; Novig’s documented game/futures schedules use one-cent payout units. International Polymarket is separate context with US restrictions. IBKR is a broker access route whose contract-specific consumer commission evidence is incomplete here.
| Product | Cost basis | Research path |
|---|---|---|
| Kalshi | General and market-specific maker/taker models | Fees → mechanics → payout |
| Polymarket US | US fee coefficient and half-even collection | US identity → funding → settlement |
| Novig | Live games versus ALWAYS futures; cent units | Units → grading exceptions |
| IBKR | Do not reuse stock-fee headlines | Broker identity before contract quote |
Source provenance and retrieval dates
Compare exact products, then settlement rules
Kalshi fee schedule ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-07-07
Polymarket US fees ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-10-19
Novig straight and futures fees ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-10-22
Published source scope only. Numerical examples labelled hypothetical are our calculations; private-account performance is not established.
Which platform belongs on your shortlist?
Kalshi is a broad event-contract venue; Polymarket US combines a dollar-based order book with sports, politics, economics and other event markets; Novig concentrates on sports. A sports-focused interface is useful when you want sports-market depth. A broader catalogue is useful when your research spans economic announcements and other events. None is a universal winner.
Polymarket international is a separate crypto-based product. Its official geographic document lists the US among jurisdictions where new positions are restricted. It is not a substitute US onboarding route.
Source provenance and retrieval dates
Which platform belongs on your shortlist?
Kalshi fee schedule ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-07-07
Polymarket US product identity ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
Polymarket US fees ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-10-19
Novig straight and futures fees ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-10-22
Polymarket international geographic restrictions ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
Published source scope only. Numerical examples labelled hypothetical are our calculations; private-account performance is not established.
What the same 100-contract example costs
For 100 contracts at $0.50, the entry stake is $50. Kalshi’s general taker formula with multiplier 1 gives $1.75; Polymarket US’s standard taker formula gives $1.7375, collected as $1.74 using its cent-rounding rule. Novig’s documented live game coefficient of 0.06 gives $1.50. These are schedule examples, not executable quotes or proof that the underlying markets are equivalent.
| Product and scope | Execution cost in example | Important exception |
|---|---|---|
| Kalshi general taker, M=1 | $1.75 | Series-specific multipliers and maker charges |
| Polymarket US standard taker | $1.74 | Table tennis, combos and rebate tiers |
| Novig live game taker | $1.50 | Futures and RFQ schedules differ |
Source provenance and retrieval dates
What the same 100-contract example costs
Kalshi fee schedule ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-07-07
Polymarket US product identity ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
Polymarket US fees ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-10-19
Novig straight and futures fees ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-10-22
Polymarket international geographic restrictions ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
Published source scope only. Numerical examples labelled hypothetical are our calculations; private-account performance is not established.
The rules can matter more than a small fee difference
Read the exact observation window, resolution source and exceptional settlement provisions. Polymarket US explicitly allows alternative settlement where contract rules specify it. Novig documents win/loss, push and fair-market-value grades, including remediation. A similar title does not establish the same payoff.
An order book also makes size relevant. An available price may cover only part of your order; a resting order may never fill. Include spread, entry and exit charges, funding and withdrawal costs rather than treating the execution fee as the whole price.
Source provenance and retrieval dates
The rules can matter more than a small fee difference
Kalshi fee schedule ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-07-07
Polymarket US product identity ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
Polymarket US fees ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-10-19
Novig straight and futures fees ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-10-22
Polymarket international geographic restrictions ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
Published source scope only. Numerical examples labelled hypothetical are our calculations; private-account performance is not established.
Identity, funding and practical fit
Polymarket US documents identity verification before deposits or trading, and supports US-specific bank, card and other funding methods. Kalshi’s published schedule distinguishes free ACH from card and processor costs. Novig’s public trading documentation establishes its present fee mechanics; a complete current consumer-state list and funding schedule were not established by that document. That narrower access gap is separate from the verified trading-fee answer.
Read the product profiles for costs, funding, settlement and limitations. These comparisons use published documentation, not deposits, trading performance or withdrawal speed tests.
Source provenance and retrieval dates
Identity, funding and practical fit
Kalshi fee schedule ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-07-07
Polymarket US product identity ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
Polymarket US fees ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-10-19
Novig straight and futures fees ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-10-22
Polymarket international geographic restrictions ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
Published source scope only. Numerical examples labelled hypothetical are our calculations; private-account performance is not established.
Compare the rule, observation and dispute path
Two contracts can mention the same release and still describe different claims. A hypothetical “payrolls above 150,000 on initial release” differs from “payrolls at least 150,000 after revision”. At exactly 150,000 the strict threshold fails and the inclusive threshold can succeed. Neither wording grants us permission to invent the merchant’s dispute policy.
| Field | Hypothetical A | Hypothetical B |
|---|---|---|
| Observation | Initial payroll release | Revised release |
| Threshold | Strictly above 150,000 | At least 150,000 |
| Cutoff | Named first release | Later named revision |
| Finality | Read exact contract source | Read exact determination/dispute rules |
Source provenance and retrieval dates
Compare the rule, observation and dispute path
Kalshi market lifecycle ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
Polymarket US settlement ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
Novig event lifecycle and settlement ↗
Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
Original synthetic examples interpret the cited documentation. No live order book, account or market forecast is reproduced.
Sources
- Kalshi fee schedule →Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-07-07
- Polymarket US fees →Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-10-19
- Polymarket US settlement →Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
- Polymarket international geographic restrictions →Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
- Novig event lifecycle and settlement →Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
- Polymarket US product identity →Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
- Novig straight and futures fees →Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verifiedDocument effective date: 2026-10-22
- Kalshi market lifecycle →Last successful source check: 2026-10-24Evidence origin: direct public-document read · Current evidence status: verified
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Your next useful step
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