Arbitrage Betting Software: What a Surebet Scanner Must Do
Surebets close within minutes and no one can compare dozens of bookmakers by hand fast enough, so most arbers use a scanner: software that collects prices from many bookmakers, finds combinations that pay on every result and shows them before they disappear. We built one ourselves in 2011, Surebet Monitor, and the hard parts have not changed since. This guide covers what a scanner must do, what the numbers on its screen really mean and how to test one before you pay for it.
Key takeaways
- A scanner is only as good as its event matching: "Man United", "Manchester Utd" and "Manchester United" must be one team, and Manchester City must never join them.
- In our 24,052-match sample, profits above 5% were 0.09% of matches, so a scanner full of 5% surebets is mostly showing errors.
- The share of surebets still available when you open them matters more than how many the scanner lists.
- Prefer a few well-covered, reliable bookmakers to hundreds of feeds that include operators who do not pay out.
- Test every scanner on a trial for a week and record placeable surebets, false matches and settlement problems.
What a scanner does
- Collects prices from bookmakers, through official feeds or by reading their websites.
- Matches events and markets: decides that a match, a market and a line at one bookmaker are the same as at another.
- Detects surebets: combines the best prices into sets whose 1/odds add up to less than 1, as explained in what is arbitrage betting.
- Shows them with stakes, profit and links to each bookmaker, in a program, a web page or as alerts.
Each step can fail, and each failure shows up as a "surebet" you cannot place or should not.
1. Detection
The detector combines prices into surebets. The more combinations it understands, the more it finds from the same data: plain two-way and three-way markets, cross-market sets such as a home win against double chance X2, and Asian handicap lines with half results. A good detector also knows which combinations only look like surebets because two markets settle differently.
2. Refresh speed
Prices reach a scanner in two ways: feeds published by some bookmakers, or reading their websites directly. Feeds are easier but often incomplete and slow, refreshed every 15 or 30 minutes; for arbitrage that is far too late. Pre-match surebets usually last minutes, live ones seconds. Ask how often each bookmaker is refreshed, not just whether it is "supported".
3. Event matching
This is the most laborious part of any scanner. The software must know that "Manchester United" at one bookmaker is "Man United", "Manchester Utd" and "Man Utd" at others, and never "Manchester City". The same goes for competitions, players, markets and lines: over 2.5 goals must not be paired with over 2.5 in the first half, and a women's or reserve match with the senior one. Every matching error produces a false surebet, which is exactly the first mistake in arbitrage betting risks.
4. Bookmaker coverage: quality over quantity
A long list of bookmakers sells subscriptions, but what counts is whether every one of them is covered fully, refreshed fast and matched without errors. Some scanners include operators that take deposits and never pay out: a surebet involving them is a loss waiting to happen. Before you open an account anywhere, check its licence and its reputation for paying winners.
5. Filters that protect you
| Filter | Why you need it |
|---|---|
| Minimum and maximum profit | very high margins on popular matches are usually errors |
| Bookmakers and markets | only the accounts you hold, only markets whose rules you know |
| Time to start | surebets minutes before kick-off rarely get placed in full |
| Outlier warning | one bookmaker far above all others is a likely palp |
| Rule differences | overtime, retirements, postponements |
Real data shows why the maximum-profit filter matters. In the 1X2 odds of six big bookmakers for 24,052 matches of 2019–2023, a surebet appeared in 1.43% of matches, a profit above 2% in 0.29% and above 5% in only 0.09%, and the largest were pricing errors. Bookmakers void those, as we show in palpable errors.
6. The calculator and the workflow
A scanner should split stakes for you, round them, account for commission, stake taxes and currencies, and let you fix the stake already placed when a price moves. If yours does not, the surebet calculator does it for two or three bets and shows every scenario.
7. Price and free versions
Subscriptions range from tens to over a hundred a month. Free versions usually show surebets with a delay, cap their profit or hide the best ones, which is often enough to learn but rarely enough to earn. Compare the cost with what you can realistically turn over: at the median surebet of 0.61% from our data, a subscription of 100 a month needs over 16,000 of turnover just to break even. The full monthly picture is in how to start arbitrage betting.
How to test a scanner
Use a trial for at least a week, in the hours you would actually bet, and record:
| Measure | How |
|---|---|
| Placeable rate | of the surebets you open, how many are still there at the listed prices |
| False surebets | wrong events, markets, lines or rules |
| Speed | how long a typical surebet stays listed |
| Coverage | how many listed bookmakers you can actually use where you live |
| Settlement problems | voids and rule differences after the event |
A scanner that lists fewer surebets but most of them placeable beats one that lists hundreds you cannot catch.
What software cannot do
No scanner protects you from limits. Taking the best price on the market is exactly what soft bookmakers watch for, and accounts that keep doing it get limited within weeks: see bookmaker limits. The same tools also find prices well above the market when there is no surebet, which takes you into value betting and middles, covered in advanced arbitrage strategies.
Summary
A surebet scanner collects prices, matches events, detects surebets and shows them fast. What separates good from bad is refresh speed, accurate event matching, reliable bookmakers and filters that hide errors. Judge a scanner by how many of its surebets you can actually place, test it on a trial, and weigh its price against the small margins of real surebets.
FAQ
What is arbitrage betting software?
It is a program or web service that collects prices from many bookmakers, matches the same events and markets, and lists combinations of bets that return a profit on every result, with the stakes to place.
Is arbitrage software worth paying for?
Only if your turnover covers it. At a median profit of 0.61% per surebet, a subscription of 100 a month needs over 16,000 of monthly turnover to break even, before other costs.
Why do scanners show surebets that disappear when I open them?
Because prices move within minutes, or seconds live, and some feeds refresh too slowly. A scanner that refreshes faster shows fewer stale surebets. Measuring how many listed surebets are still placeable is the best test.
Why do some surebets show a 10% or 20% profit?
On popular matches such margins are almost always errors: a misplaced decimal point, swapped prices or a wrong line. Bookmakers void such bets, so a good scanner filters or flags them.
Can a scanner stop bookmakers from limiting me?
No. Limits come from what you bet, not from the tool you use to find it. Taking the best price on the market is exactly what soft bookmakers watch for.