How Betting Odds Work

Decimal odds: the format used on SA betting sites

Decimal odds show your total return per R1 staked, including the stake. Multiply your stake by the decimal price to get everything that comes back if the bet wins.

• 1.50 → R100 returns R150 (R50 profit)
• 2.00 → R100 returns R200 (R100 profit — an even-money bet)
• 3.40 → R100 returns R340 (R240 profit)
• 5.00 → R100 returns R500 (R400 profit)

The lower the number, the shorter the price and the more likely the outcome is judged to be. A team priced at 1.30 is a heavy favourite; a price of 6.00 is a clear underdog. You do not need to add your stake back on separately — decimal odds already include it, which is what makes them easier to read than fractional or American formats you might see on overseas sites.

Turning odds into probability

Every price converts directly into an implied probability. The formula is simple:

Implied probability = 1 ÷ decimal odds

• 1.50 → 1 ÷ 1.50 = 0.667 = 66.7%
• 2.00 → 1 ÷ 2.00 = 0.50 = 50%
• 3.40 → 1 ÷ 3.40 = 0.294 = 29.4%
• 5.00 → 1 ÷ 5.00 = 0.20 = 20%

This is the number the market is quoting as the chance of that outcome. If your own read of a match — form, injuries, home advantage in a PSL derby, a fast pitch for Test cricket — puts the real chance higher than the implied probability, that price is where the value sits. Odds are a market opinion, not a guarantee, and they move as money comes in and team news lands. Our market movers page tracks those shifts across the schedule.

The bookmaker margin (the overround)

Add up the implied probabilities of every outcome in a market and you will get more than 100%. That extra slice is the bookmaker margin — sometimes called the overround or juice — and it is how the site builds in its edge.

Take a two-way market like a tennis ATP match with no draw:

• Player A at 1.80 → 55.6%
• Player B at 2.05 → 48.8%
• Total = 104.4%

That 4.4% over 100% is the margin. In a three-way football market (home / draw / away) the same principle applies across all three prices. The lower the total margin, the fairer the pricing and the more the returns come back to you over time.

From our sampled odds data, the margins we recorded vary between books. Across 27 sampled markets, 10bet showed an average margin of about 4.8%. Betway averaged around 6.5% across 238 sampled markets, and Sportingbet came in near 8.6% across 39 markets. Lower margin means a longer effective price for you on the same outcome — which is exactly why comparing before you place matters.

A worked example: single bet payout

Say Orlando Pirates are priced at 2.30 to win a Premiership (PSL) fixture and you stake R150.

• Total return = R150 × 2.30 = R345
• Profit = R345 − R150 = R195
• Implied probability = 1 ÷ 2.30 = 43.5%

Now compare that to the same team at 2.45 on a different site:

• Total return = R150 × 2.45 = R367.50
• Profit = R217.50

Same bet, same outcome — but the higher price puts an extra R22.50 in your pocket for a R150 stake. Scaled across a season of bets, taking the better number consistently is one of the few edges fully in your control. Our betting odds page and comparison tools line up prices on the same fixtures so you can see who is longest.

How a multi (accumulator) is priced

For a multi, multiply the decimal odds of each leg together, then multiply by your stake. A three-fold looks like this:

• Leg 1: 1.50 (a rugby favourite)
• Leg 2: 1.80 (a Premier League home side)
• Leg 3: 2.10 (an over/under market)

Combined price = 1.50 × 1.80 × 2.10 = 5.67

A R50 stake returns R50 × 5.67 = R283.50 (R233.50 profit). Every leg must win. The reason multis pay so much more is that you are compounding probability — and compounding the margin. Three legs with a 5% margin each stack up, so accumulators carry a bigger built-in house edge than singles. Bet Builder markets (available at Betway among others) work on the same maths, combining picks within one match into a single price.

Live odds and Cash Out

During a match, prices update as the game state changes — a red card, a wicket, a break of serve. Live Betting markets on sites like Betway, Hollywoodbets, Sportingbet, Supabets and 10bet re-price second by second off that flow.

Cash Out lets you settle a bet before the market closes at the current live value rather than waiting for the final result. The offer you see is calculated from live odds minus the operator's margin at that moment, so it will usually be a little under the true implied value. It is a risk-management tool, not a way to beat the price. Betway, Sportingbet and 10bet list Cash Out among their features; not every SA book offers it, so check the market before you rely on it.

Comparing odds across South African books

The single most practical habit is shopping the same market across a few licensed sites before you commit. On our sampled data, best-price share — how often a book posted the top price in a market — was around 91% for Betway (238 markets) and about 85% for 10bet (27 markets), while Sportingbet posted the best price in roughly 28% of its 39 sampled markets. Those figures only cover the markets we sampled, not the whole schedule, but they show how much prices can differ on identical outcomes.

All the operators referenced here are licensed by South African provincial authorities — Western Cape GRB, KZN Gaming & Betting Board, Gauteng Gambling Board, the Mpumalanga Economic Regulator — under the national framework. You must be 18 or older to bet. Stick to legal betting sites so payouts and dispute resolution are protected.