Sports Betting: Reading the Price Before the Pick
This section treats sports betting as a pricing problem first and a prediction problem second. Every price on a sportsbook is the bookmaker's estimate of a probability, plus a margin. If you can read that estimate and that margin, you can judge whether a bet is worth considering at all; if you cannot, every pick is a guess wrapped in excitement. The pages below cover four sports — football, basketball, tennis and cricket — and a separate guide to how each bet type settles.
Three ways of writing the same price
Decimal odds show the total return per dollar staked, including the stake: 1.91 returns C$1.91 for every C$1. American odds, common on North American broadcasts, show profit relative to C$100: +150 wins C$150 on a C$100 stake, while -110 means staking C$110 to win C$100. Fractional odds such as 10/11 show profit over stake. To turn any of them into a probability, divide one by the decimal price: 1 ÷ 1.91 is 52.4%.
Finding the bookmaker's margin
Take a two-way market priced at -110 on both sides — 1.91 in decimal. Each side implies 52.4%, so the pair adds up to 104.8%. The extra 4.8 points are the margin, sometimes called the overround or vig. On a three-way football market the margin is often higher, and on player props higher still. The practical lesson: a side has to win more than 52.4% of the time at -110 just to break even, and few casual bettors manage that over a season.
| Price | Decimal | Break-even win rate |
|---|---|---|
| -200 | 1.50 | 66.7% |
| -110 | 1.91 | 52.4% |
| +100 (even) | 2.00 | 50.0% |
| +150 | 2.50 | 40.0% |
| +300 | 4.00 | 25.0% |
Live betting and cash out
In-play markets reprice continuously as the game unfolds. Prices move fast, markets suspend at key moments such as goals or penalties, and the margin on live lines is usually wider than before kick-off. Cash out, where offered, lets you settle a bet early at a price the bookmaker sets; that price includes its own margin, so cashing out regularly costs more than it seems. Treat both as tools for specific situations, not as a way to play more.
Where sports betting sits in Canada
As with casino games, betting is regulated province by province. Ontario's open market covers sportsbooks registered with the AGCO and contracted with iGaming Ontario, while in most other provinces the provincial lottery corporation runs the regulated online option. This guide does not state whether any particular operator, Instant included, is authorised where you live; check the provincial records yourself. It also does not advertise free bets or other promotions.
A staking rule that survives losing runs
Bet a fixed unit — 1% to 2% of a dedicated betting budget — and keep it fixed. With a C$300 budget that is C$3 to C$6 a bet. Losing runs of five or six bets happen to everyone, even with sound judgement, and a fixed unit means a bad week costs a few percent instead of the whole budget.