Surebet. What it is and how to calculate it

Surebet: Calculation, what they are, and how to find them

Complete Guide

Sure betting, or Surebet for short, uses a mathematical technique that allows you to obtain a guaranteed return regardless of the outcome of the event. This guide takes you step by step through understanding the equations that generate a 100% guaranteed steady profit.

What is a Surebet?

Betting on an event means wagering a sum of money on the predicted outcome of a match. Every bet carries risk: if your prediction is incorrect, you lose your stake.

Here is an example of a quote for the match Tennis Player 1 vs Tennis Player 2:

Betting €10 on Outcome 1 (Tennis Player 1 to win):

Win if Tennis Player 1 wins:

€10 × 1.4 = €14 → net profit + €4

Loss if Tennis Player 2 wins: – €10

But is it possible to bet on both outcomes without taking any risks? Let’s see what happens when we distribute €20 equally between both tennis players:

Result of betting on both outcomes with a single bookmaker:

Result 1: €19.19 – €20 invested = – €0.81

Result 2: €19.18 – €20 invested = – €0.82

The negative margin represents the bookmaker’s profit. You always lose.

Sports arbitrage, or Surebet, was born right here: by exploiting the differences in odds between multiple bookmakers, it is possible to bet on opposing outcomes of the same event and obtain a mathematically guaranteed profit.

How to calculate a Surebet

Let’s take the same match, Tennis Player 1 vs Tennis Player 2, this time quoted by two different bookmakers:

Let’s analyze all possible combinations by distributing €20 on the opposite outcomes:

Case 1 — Only BOOK 1 (loses)

Bet

Gross winnings

Net result

Book 1 – Outcome 1: 1.4 × €13.71

€ 19.19

– € 0.81

Book1 – Outcome2: 3.05 × €6.29

€ 19.18

– € 0.82

Bookmaker margin

– 4.05%

Case 2 — Only BOOK 2 (loses)

Bet

Gross winnings

Net result

Book 2 – Outcome 1: 1.55 × €12.62

€ 19.56

– € 0.44

Book2 – Outcome2: 2.65 × €7.38

€ 19.56

– € 0.44

Bookmaker margin

– 2.20%

Case 3 — Combination BOOK 2 + BOOK 1 → SUREBET!

Bet

Gross winnings

Net result

Book 2 – Outcome 1: 1.55 × €13.26

€ 20.55

+ € 0.55

Book1 – Outcome2: 3.05 × €6.74

€ 20.56

+ € 0.56

Guaranteed net income

+ 2.8%

This is a Surebet:

By betting Book2-Outcome1 + Book1-Outcome2 you mathematically win in both cases, with a guaranteed net return of +2.8% on the invested capital.

Why Surebets are generated

Surebets exist because bookmakers evaluate outcomes independently of each other. This happens for three reasons:

  • Competition: To attract bettors, a bookmaker may offer higher odds than others.
  • Lack of updating: no bookmaker is able to monitor all the outcomes of all the events of the others in real time.
  • Evaluation errors: a simple error in estimating the probability of an outcome can generate an anomalous odds.

Why FinderBet was born

Other services on the market have one or more of these problems:

  • They use bookmakers that do not accept Italian customers.
  • They update surebets too slowly — the odds are constantly changing.
  • They are expensive, difficult to use, or unintuitive.
  • They calculate surebets on few markets, few events and few championships.

FinderBet was created to solve all this, offering a comprehensive, fast, and accessible tool for the Italian market.

Is it possible to find Surebets on your own?

Finding and calculating surebets manually is a time-consuming and error-prone process. Consider the scale of the problem:

Listed Sports

~ 30

Championships

~ 450

Events

~ 6.750

Results analyzed

~ 2.000.000

The result is billions of possible combinations. Calculating them by hand is impossible. FinderBet processes them all automatically, in just a few seconds.

FinderBet does everything automatically:

✓ Scan all the scheduled sports championships in just a few minutes

✓ Analyze all matches and all available odds

✓ Calculate billions of mathematical combinations every time

✓ Finds Surebets and reports them in real time, without limits

Are you ready to always win?

Ultimo aggiornamento: 23 June 2026
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