Do prediction markets like Novig and Polymarket really have lower fees than a sportsbook?

Q: Do prediction markets like Novig and Polymarket really have lower fees than a sportsbook?

Traditional sportsbooks build their fee, the vig, directly into every price, so a -110 bet costs you the same fixed cut no matter what. Novig, a CFTC-regulated prediction market, charges a much smaller fee instead, a taker fee of roughly 0.03 times the contract price times one minus the contract price, capped near three quarters of a cent per dollar-contract at a 50/50 price, charged whether the trade wins or loses. On a $100 bet at even odds, that means a sportsbook nets you $90.91 if you win, while Novig nets you about $98.50. The fee doesn't disappear, it shrinks to a fraction of the size. Fee schedules can change, so treat this as current as of when it was checked, not a permanent guarantee.

Market Reading

2 diagrams•7 min read•Updated Aug 21, 2026

Written by VIMB

Short answer

The vig is a choice, not something every betting platform has to charge.Novig charges a real fee too, on every trade, win or lose, but it's a fraction of a sportsbook's hold.Same $100 coin flip: a sportsbook nets you $90.91 if you win. Novig nets you about $98.50.

Every sportsbook prices a coin flip at -110 on both sides. You already know that costs you money whether you win or lose. What most bettors don't know is that isn't the only way to price a bet.

There's a whole category of platform that charges you differently, and some of the biggest names in it are sitting on this site's own promos page right now.

The vig is a choice, not a law

A sportsbook builds its fee into the price itself. -110 on both sides of a coin flip means the book collects its cut no matter who wins. You never see a separate charge because it was never separate. It's baked into the number before you even look at it.

That's one way to run a betting market. It isn't the only way.

What a prediction market actually is

Novig, ProphetX, Kalshi, and Polymarket aren't licensed as sportsbooks. They're regulated by the CFTC, a federal body, not a state gaming commission. Legally, you're not placing a bet with the house. You're trading a contract on an outcome.

That different legal structure is exactly why the fee works differently too.

Where the fee actually livesBoth charge you whether you win or lose. The size is the whole difference.

↔ swipe to see the whole diagram

Most of these platforms market that difference openly. Novig and ProphetX both position themselves around tighter pricing built for sharper bettors, with fewer of the limits a traditional book uses to slow sharp action down. Polymarket runs as the largest prediction market in the world. You buy or sell a position as the real odds shift, instead of betting a fixed line.

How much you actually save, with real numbers

This site has already shown the real math on the standard vig: $1,000 through the book on pure coin-flip bets at -110 both sides costs you $45.50, no edge either way, just the fee doing its job. That's 52.4% you need to win just to break even.

Novig publishes its own fee formula. A taker fee of 0.03 times the contract price times one minus the contract price, capped at its highest point on a 50/50 contract, where it works out to about three quarters of a cent per dollar of exposure. Put $100 on a genuine coin flip on Novig and the fee comes to about $1.50, charged whether you win or lose, same as a sportsbook.

Here's what that actually means on a real bet. $100 at -110 on a coin flip nets you $90.91 if it wins. $100 on Novig at a 50/50 price nets you about $98.50 if it wins, after their fee. Same $100, same true coin flip, $7.59 more in your pocket.

What you actually walk away withSame $100, same coin flip, assuming it wins.

↔ swipe to see the whole diagram

Where these numbers come from

Sportsbook math is standard -110 pricing, verified elsewhere on this site. Novig's fee formula is the one they publish. Fee schedules can change and can vary by market, so treat this as accurate as of when it was checked, not a permanent promise. Always check a platform's current terms before you rely on a specific number.

The catch, honestly

This isn't free money and it isn't a cheat code. Three real limits worth knowing before you move any action over.

▸Liquidity is thinner. A major sportsbook can match a large bet instantly. A prediction market sometimes can't, especially on less popular markets.

▸Coverage is narrower. These platforms don't list every prop, every college game, every obscure line a full sportsbook carries.

▸You're trading against other sharp traders, not squares. The easy money a sportsbook sometimes leaves on the table for you isn't automatically sitting there on a platform full of people who are also paying attention.

What to actually do with this

▸Keep your sportsbook accounts for coverage and speed. Don't expect one platform to replace the other completely.

▸Check the same bet on a prediction market before you place it at a full vig. If the price is meaningfully better, that's real money, not a marketing claim.

▸Start small. Liquidity and execution feel different from a sportsbook, and it's worth learning that on a bet size that doesn't matter yet.

▸Remember the legal category is different. You're trading an event contract, not placing a traditional sports bet, and that distinction is exactly why the fee works the way it does.

The vig isn't the cost of betting. It's the cost of betting at a business that chose to price it that way. Now you know there's a real alternative, and what it actually costs to use it.