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Arbitrage betting since 2011

Free surebet calculator for arbitrage bettors

Surebet Monitor started in 2011 as a surebet scanner written by bettors for bettors. Today it is a free calculator that splits your stakes across two or three bets so every result pays the same, with stake tax, Asian lines and a catalog of nearly 20,000 ready-made combinations.

Open the surebet calculatorOur story

What the calculator does

  • Two or three bets

    Match result, double chance, totals, handicaps and more: pick the bets that cover every result and the calculator finds the stakes.

  • Stake tax and tax-free bets

    Set a stake tax such as Poland's 12%, mark the bets that are tax-free and see what every scenario really pays.

  • Nearly 20,000 combinations

    Not sure which bets cover every result? Search the catalog of ready-made combinations or build one bet by bet.

A surebet in numbers

Two bookmakers disagree about one match: one pays 2.10 on over 2.5 goals, the other 2.05 on under 2.5 goals. 1/2.10 + 1/2.05 = 0.964, below 1, so the prices leave room for a profit.

BetStakeReturns
Over 2.5 goals at 2.1049.40103.74
Under 2.5 goals at 2.0550.60103.73
Total100.00a profit of 3.73 (3.7%) whatever the score

Without stake tax. Prices move within minutes, and a surebet only exists while both of them do: place both bets before either one changes.

Try it with your own odds

From the knowledge base

All guides

Guides written by arbers, with real odds and data: how surebets work, what goes wrong and how bookmakers react.

Arbitrage basics
What is arbitrage betting?
Surebets explained with real odds and data from 24,052 matches.
Arbitrage basics
Arbitrage betting risks and common mistakes
Everything that can turn a calculated surebet into a loss, and how to prevent it.
Arbitrage basics
How to start arbitrage betting
Accounts, money, tools and a first surebet, step by step.
Arbitrage basics
Value betting vs arbitrage betting
Expected value, closing odds and variance: what still pays.
Arbitrage basics
How bookmakers make money
The margin formula, the balanced book myth and margins by market.
Strategy
Advanced arbitrage strategies
Middles, cross-market arbs, exchanges, promotions and line shopping in numbers.

Two e-wallets for arbers

The wallets we use to move money between bookmakers in seconds. We reviewed both, pros and cons included.

  • E-wallet for bettors

    Skrill

    One wallet for your whole bankroll

    Instant bookmaker deposits, free bank transfer top-ups, about 40 currencies and VIP with free withdrawals.

    • 0%bank transfer top-ups
    • ~40currencies in one wallet
    • €0bank withdrawals from VIP level
    Open a Skrill accountRead the review: Skrill

  • E-wallet for bettors

    Neteller

    Your bankroll in one wallet

    Deposits with bookmakers in seconds, a multi-currency wallet, the Net+ prepaid Mastercard and VIP levels with cheaper currency conversion.

    • ≤3.99%currency conversion, from 1.29% for VIPs
    • $15,000a quarter for VIP Silver
    • Net+prepaid Mastercard for your balance
    Open a Neteller accountRead the review: Neteller

Partner links: signing up through them supports this site. Betting is for adults only (18+).

Betting tips and streaks on SharkBetz

Surebet Monitor sticks to arbitrage. Its sister site SharkBetz covers the rest: free football and tennis tips, team and player streaks, a club Elo ranking and more calculators.

Surebets: frequently asked questions

What is a surebet?

A surebet, or arbitrage bet, is a set of bets on every outcome of an event, placed with different bookmakers at odds high enough that the stakes can be split so every outcome pays more than the total staked. It exists when bookmakers disagree on prices: the sum of 1/odds over all the outcomes falls below 1.

How does the surebet calculator work?

Pick two or three bets that together cover every result, or a ready-made combination from the catalog, enter the odds and your total stake. The calculator splits the stake so every result pays the same and shows the profit, with stake tax, tax-free bets, refunds and the half results of Asian lines. It runs in your browser: the odds and stakes you type are not sent to us.

Is arbitrage betting legal?

Placing bets with bookmakers licensed where you live is legal for adults, and covering every outcome breaks no law. Bookmakers' terms, however, let them limit or close the accounts of players who win steadily, and many do so with arbitrage bettors.

Why do surebets disappear so quickly?

Because one of the prices is wrong, and bookmakers correct wrong prices within seconds or minutes. The main risk is placing the first bet and finding the second price gone, which leaves you with an ordinary bet instead of a sure profit.

Does Surebet Monitor still scan for surebets?

No. The scanner is no longer running: the site offers the calculator, its catalog of combinations and know-how about arbitrage. We do not sell tips or alerts.