Group-Stage Parlays: What Stacking Five Favorites Really Costs

Published 2026-06-22 · Tags: sports, math

Five 1.40 favorites pay 5.38 for something worth 6.90. The full table of parlay holds by leg price, and the one kind of multi that isn't terrible.

Ten days into the group stage and the most common ticket in the big-bets feed is some version of the same thing: five favorites, all to win, combined price somewhere between 4.00 and 8.00. It looks like free money. "They're all going to win anyway."

Let's do the arithmetic once, properly, so you can decide with your eyes open.

What a favorite's price actually says

A team at 1.40 has an implied probability of 1 / 1.40 = 71.4%. But that number includes the book's margin. In a typical three-way football market the three prices add up to about 105%, so the fair probability is closer to 71.4 / 105 ≈ 68%.

Read that again. The book's own number says a 1.40 favorite loses, or draws, roughly one match in three. Not one in ten. One in three.

Stack five of them

Say all five legs are 1.40 favorites. The combined price is 1.40^5 = 5.38. The combined fair probability is 0.68^5 ≈ 14.5%, which corresponds to a fair price of about 6.90.

So you're being paid 5.38 for something worth 6.90. The hold on your ticket is about 22%. Single-match bets on the same market carry roughly a 5% hold. By stacking, you've quadrupled the tax.

Here's the full table for five legs at various prices, assuming the same 5% margin on every leg:

The hold goes up as legs get closer to even money, because the margin is a larger slice of each leg's probability.

"But the favorites really are better"

They are. The odds already know that. What you're betting on isn't whether the favorite is better; it's whether the favorite is better by more than the price says. Five times in a row. With the book taking a cut on each of the five.

If you genuinely think a 1.40 favorite is a 78% team rather than a 68% one, that's a real edge, and the right way to play it is a single on that match. Adding four more legs you have no opinion about dilutes your edge with four doses of margin.

The one parlay that isn't terrible

Correlated legs. If you think a team wins comfortably, "team to win" and "over 2.5 goals in that match" are not independent events; a comfortable win pushes both. Books know this and price same-game parlays accordingly, but the pricing is imperfect, and it's the one area where a multi-leg ticket can be close to fair.

Cross-match legs, by contrast, are independent by construction. There's no correlation to exploit. There's only margin to pay.

What it looks like in the tracker

Open any profile in the sports tracker with a lot of parlays and look at the resolution column. The hit rate on 5-leg favorite stacks we've watched this tournament is right about where the math above says it should be: one ticket in seven, give or take. The people cashing them aren't doing anything clever. They're the one in seven.

If you're going to do it anyway

Fine. Everyone does one. Two things:

Make the stake small enough that it's entertainment, not a position. A ticket you'd be annoyed to lose is too big.

Don't chase a lost parlay with a bigger parlay. We wrote the full version of why in the crash-strategy post and it applies word for word.

Back to the football.