Sure bet prediction vs. arbitrage: why only one is guaranteed
A sure bet prediction is a tip on one outcome, and no tip is guaranteed: a -500 favorite still loses about 1 time in 6. An arbitrage sure bet is math, not a forecast. You back every outcome at different sportsbooks when their odds disagree, so the profit is locked in whoever wins. Arbocado's arbitrage betting finder lists these sure bets with the stake for each side.
- A sure bet prediction picks one outcome, so it can always lose.
- A -500 favorite implies about an 83% chance of winning, which means it loses roughly 1 time in 6.
- Five -500 favorites in a parlay all win only about 40% of the time at those implied odds.
- An arbitrage sure bet covers every outcome at different books, so it profits whoever wins.
- Anyone selling guaranteed predictions or fixed matches is running a scam.
The short answer
A sure bet prediction is someone's pick on one outcome. However confident the tipster is, a pick can lose. An arbitrage sure bet is different: you bet every outcome at different sportsbooks when their odds disagree, so one bet always wins and its payout covers all your stakes.
Only the second kind is guaranteed, and it comes from math, not from knowing who wins.
Why predictions can lose
Odds tell you how often the book expects an outcome to happen. A -500 favorite implies about an 83% chance (500 ÷ 600). That's strong, and it still loses about 1 time in 6.
| Bet | Implied chance it wins | Roughly loses |
|---|---|---|
| One -500 favorite | 83.3% | 1 in 6 |
| Two -500 favorites in a parlay | 69.4% | Nearly 1 in 3 |
| Five -500 favorites in a parlay | 40.2% | 3 in 5 |
Those figures include the book's margin, so the real chances are a little lower. Stacking "sure" picks into a parlay makes it more likely to lose than to win.
What a real sure bet is
In betting jargon, a sure bet (or surebet) is an arbitrage. Say FanDuel has the Lakers at +112 and DraftKings has the Celtics at +108. Put $49.52 on the Lakers and $50.48 on the Celtics, and about $105 comes back on $100 whichever team wins.
No forecast is involved. The profit exists because the two books disagree, and their combined implied probability (95.3%) is under 100%. For the full explanation, see what is arbitrage in sports betting.
Predictions, value bets, and arbs
| Sure bet prediction | Value bet | Arbitrage sure bet | |
|---|---|---|---|
| What you bet | One outcome | One outcome | Every outcome |
| Can a single bet lose? | Yes | Yes | No, if every bet stands |
| Where the edge comes from | The tipster's opinion | Odds above the true chance | Books disagreeing on price |
| Typical return | Varies, often negative | Positive on average over many bets | 1% to 5% per arb, locked in |
| Needs more than one book? | No | No | Yes |
Value betting is a legitimate strategy, but it accepts losing streaks. Arbitrage trades a smaller return for no exposure to the result. A similar trade-off shows up in arbitrage betting vs. matched betting.
Red flags
Sites and social accounts that sell guaranteed picks are common. Walk away from any of these:
- "100% sure" or "guaranteed" predictions on a single outcome.
- "Fixed matches" or inside information for sale.
- Win records shown only as screenshots, with no losses listed.
- Pressure to pay before a pick "expires" in the next hour.
A real arbitrage tool shows you the odds at each book and the math. You can check every number against the sportsbook apps yourself.
Finding real sure bets
Sure bets come from comparing one market across many books. You can do it by hand, but an arbitrage betting finder checks every book at once and sizes each stake. Arbocado's finder is free to try, and you can check any pair of odds in the free arbitrage calculator.
See today's sure bets
Arbocado's Arbitrage Finder scans the major US sportsbooks and exchanges for sure bets and shows the stake for each side.
Open the Arbitrage FinderTo pick a tool, read about the best arbitrage betting software, then place your first arb step by step.
Frequently asked questions
Are sure bet predictions real?
Not in the guaranteed sense. A prediction picks one outcome, and even heavy favorites lose. The only sure bets are arbitrage bets, which back every outcome at different sportsbooks so the payout covers your stakes whatever happens.
What is a sure bet in sports betting?
In betting jargon, a sure bet (or surebet) is an arbitrage: a set of bets on every outcome of a market, placed at different books, that returns a profit whichever outcome wins. It comes from the odds, not from predicting the result.
Is value betting the same as a sure bet?
No. Value betting backs one outcome whose odds are better than its true chance. It wins on average over many bets but can lose any single one. A sure bet covers every outcome and can't lose as long as every bet stands.
How do I find real sure bets?
Compare the same market across many sportsbooks and look for prices whose implied probabilities add up to under 100%. An arbitrage finder does this automatically. Arbocado's Arbitrage Finder scans the major US books and exchanges and sizes each stake.