Head to head
Which venue is currently the cheaper side of the same NBA props, de-vigged and counted live.
Right now BeatVig prices 106 NBA props at both. Kalshi is the cheaper side 92% of the time (98 of 106), and FanDuel is cheaper on 6. This is the board as it stands at 31 Oct 18:24 ET, not an average over any period — BeatVig measures live prices and keeps no price history.
FanDuel prices a deeper prop menu than Kalshi lists, so the interesting question is not who covers more — it is who is cheaper on the props both of them price. FanDuel earns its margin on every bet you make; Kalshi charges a per-contract fee that is biggest on close-to-even markets and smallest on lopsided ones. That means the gap between them is not a constant, and the only honest way to answer it is to measure it per prop, which is what the board below does.
Counted above: every prop Kalshi prices lower than FanDuel. Listed below: the ones that also beat a de-vigged fair price, which is the stricter test and the only one worth acting on.
Kalshi
+10848.1%48¢
vs
FanDuel
-11152.6%53¢
· +4.53pp vs FanDuel
fair 50% · Pinnacle, multiplicative devig
+1.92pp
was the raw edge before Kalshi's
fee, which takes 2.0 percentage points of it
Kalshi
+13342.9%43¢
vs
FanDuel
+11047.6%48¢
· +4.7pp vs FanDuel
fair 44.3% · Pinnacle, multiplicative devig
+1.41pp
was the raw edge before Kalshi's
fee, which takes 2.0 percentage points of it
Kalshi
+14441%41¢
vs
FanDuel
+12843.9%44¢
· +2.88pp vs FanDuel
fair 42.1% · edge -0.88pp (worst case -2.53pp) — this edge is -0.88 percentage points under the de-vigging method BeatVig publishes and as little as -2.53 under the least flattering of the 4 methods that fit Kalshi's own two-sided prices
+1.12pp
was the raw edge before Kalshi's
fee, which takes 2.0 percentage points of it
Free accounts see a 3-edge sample from below the top of the board. Premium unlocks every prop where Kalshi beats FanDuel, in every sport.
Go PremiumAcross the 106 NBA props priced at both venues right now, Kalshi is the cheaper side on 98 and FanDuel is cheaper on 6; the rest are priced identically at both. Neither venue is cheaper on everything, and this is a live count of the current boards rather than an average over time.
Every quote from both venues is converted to the implied probability of the same outcome, so a contract price and an American price become the same unit. The cheaper venue is the one implying the lower probability for the side you want.
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.
FanDuel's margin is inside the price, so it is charged on every bet regardless of the result.
It is computed from the live board every time the page loads, so it reflects the prices both venues are showing at that moment rather than a snapshot taken on an earlier day.
