Right now BeatVig is measuring 4,606 two-sided quotes on player props. The typical sportsbook vig is 6.86% across 2,603 of them, and the typical prediction-market spread is 5.56% across 2,003. Those two numbers are not the same measurement — see how this is measured, below. This is the board as it stands at 01 Nov 17:01 ET, not an average over any period — BeatVig measures live prices and keeps no price history.
Sportsbooks — median vig
The margin built into the price. You pay it on every bet, win or lose.
| Venue | Median spread | Props measured |
|---|---|---|
 Pinnacle
|
5.61% | 103 |
 DraftKings
|
6.59% | 366 |
 Hard Rock Bet
|
6.78% | 1,380 |
 Fanatics Sportsbook
|
6.93% | 296 |
 FanDuel
|
6.97% | 269 |
 BetRivers
|
7.60% | 189 |
Prediction markets — median spread
The gap between the two sides of an order book. The venue's fee is charged separately, on top of this.
| Venue | Median spread | Props measured |
|---|---|---|
 Polymarket
|
2.94% | 125 |
 Kalshi
|
3.00% | 566 |
 Novig
|
7.57% | 696 |
 ProphetX
|
7.90% | 616 |
How this is measured
The arithmetic, and the one comparison it cannot make.
Every price is converted to the probability it implies. On a fair market the two sides of a prop would sum to exactly 100%; a real quote sums to more, and the excess is the vig. A -110 / -110 prop implies 52.38% on each side, 104.76% together, so the vig is 4.76%. This page takes that figure for every prop a venue is quoting both sides of and publishes the median — the typical prop, rather than a mean a handful of stale or illiquid quotes could drag upward — alongside the number of props it was measured over.
A book's vig and an exchange's spread are not the same cost, which is why this page never ranks them in one list. At a sportsbook the excess is the margin itself: it is inside the price and you pay it on every bet. At a prediction market the excess is the gap between the two sides of an order book, and the venue charges its fee separately, on top of it:
- Kalshi. Kalshi charges a per-contract trading fee instead of building a margin into the line. The fee is a curve, not a flat rake: it peaks at roughly 1.75¢ on a contract priced near 50¢ and shrinks toward zero at both extremes, and maker fees are a quarter of taker fees.
- Polymarket. Polymarket's taker fee is a fraction of a percent, which makes its headline quote very close to the all-in cost and often the cheapest of the exchanges in the middle of the price range.
- Novig. Novig takes a small per-contract fee from the taker and pays makers a rebate rather than baking vig into the line. It is low-fee rather than fee-free, and when Novig steps in as counterparty in a thin market a spread comes back into the price.
- ProphetX. ProphetX charges commission on net winnings rather than embedding a margin, so the cost is explicit and only applies when you win.
Netting those fees into a single all-in number would need the fee for the contract price of each individual fill, and that curve is not in the price data BeatVig stores. So this page does not publish an apples-to-apples ranking it cannot defend: it publishes the two measurements under their own headings and states that a naive implied-probability comparison flatters the exchange. To net an explicit fee against a specific price yourself, use the no-vig calculator.
By market
Where the vig and the spread are worst, split by venue kind.
| Market | Sportsbooks | Prediction markets | Props |
|---|---|---|---|
| Receiving Yards | 7.45% | 4.00% | 595 |
| Points | 6.78% | 6.54% | 576 |
| Rushing Yards | 7.74% | 4.00% | 460 |
11 more markets behind Premium
Free accounts see a 3-market sample from below the top of the board. Premium unlocks the vig and spread on every prop market, in every sport.
Go PremiumVig by book — FAQ
What is the vig on a sportsbook prop?
The vig is how much a sportsbook's two prices sum to above 100% once both are converted to implied probability. A -110 / -110 prop implies 52.38% on each side and 104.76% together, so the vig on it is 4.76%.
Which venue has the lowest vig right now?
Across the 103 player props Pinnacle is currently quoting both sides of, its median vig is 5.61% — the lowest of any sportsbook on this board at the moment. This is a live measurement of the current board, not an average over time.
Do prediction markets charge less vig than sportsbooks?
The comparison is not direct. A sportsbook's margin is inside the price, so the excess over 100% is the whole cost. A prediction market's excess is the bid/ask spread of an order book and its fee is charged separately on top, so comparing implied probabilities alone flatters the exchange.
How is the vig on this page calculated?
Both sides of every prop a venue is quoting are converted to implied probability and summed; the amount over 100% is that prop's vig (called the spread when the venue is a prediction market rather than a sportsbook — see the FAQ above on why the two are not the same cost). The figure published per venue is the median across every such prop on the live board, and the number of props behind it is published next to it.
Why is a venue missing from the table?
A venue appears only once it is quoting both sides of at least 30 props on the current board. Below that a single quote moves the figure by more than three points, so the sample is named rather than rounded into a number.