Arbitrage Betting Explained
Arbitrage betting (arb) is a technique that guarantees profit by covering all possible outcomes of an event. When odds from different sportsbooks create a market where you can bet on every outcome and still make money, you've found an arbitrage opportunity. In this guide, we'll explain how arbitrage works, how to calculate stakes, and the risks involved. All information verified by our team of experts.
⚠️ Important: Arbitrage Has Risks
While arbitrage betting is mathematically risk-free, real-world risks include: odds changing before you place all bets, account limitations (gubbing), bet cancellation, and tax implications. Sportsbooks actively detect and restrict arbitrage players. Proceed with caution. Responsible gambling resources →
How Arbitrage Works
Arbitrage % = (1/odds₁) + (1/odds₂) + ... + (1/oddsₙ)
If total < 1, arbitrage exists
Example: Odds: +110 (2.10) and +120 (2.20)
(1/2.10) + (1/2.20) = 0.476 + 0.455 = 0.931 (93.1%) → 6.9% profit
What is Arbitrage?
Arbitrage betting exploits price differences between sportsbooks. By betting on all outcomes, you guarantee profit regardless of the result. Also called "arbing" or "surebet".
Why Do Arbs Occur?
Different opinions, slow odds updates, promotional odds, or bookmaker errors. Arbs are most common in live betting where odds update at different speeds across books.
Two-Way vs Three-Way
Two-way markets (tennis, basketball moneyline) are simpler. Three-way markets (soccer win/draw/win) offer more opportunities but require more complex calculations.
Arbitrage vs Matched Betting
Matched betting uses free bets and promotions. Arbitrage exploits odds differences without promotions. Matched betting is more sustainable; arbitrage leads to faster account limits.
Arbitrage Example ($100 Total Stake)
| Outcome | Odds | Stake | Payout if Wins | Profit |
|---|---|---|---|---|
| Team A (Book A) | +110 (2.10) | $47.62 | $100.00 | +$6.93 |
| Team B (Book B) | +120 (2.20) | $45.45 | $100.00 | +$6.93 |
| Total Staked | $93.07 | $100.00 | +$6.93 (7.4%) | |
Three-Way Arbitrage Example (Soccer)
| Outcome | Odds | Stake | Payout if Wins |
|---|---|---|---|
| Home Win (Book A) | 2.50 | $40.00 | $100.00 |
| Draw (Book B) | 3.50 | $28.57 | $100.00 |
| Away Win (Book C) | 3.20 | $31.25 | $100.00 |
| Total Staked | $99.82 | $100.00 | |
Profit: $0.18 (0.18%) on $100 stake. Small profits are common in arbitrage.
Types of Arbitrage
🎯 Pre-Match Arbitrage
Traditional
Odds differences before events start. More stable but lower frequency. Requires monitoring multiple books.
⚡ Live Arbitrage
Highest frequency
Odds update at different speeds during live play. Most arb opportunities, but odds change fastest. Requires quick execution.
🔄 Cross-Market Arbitrage
Different markets
Arb between different markets (e.g., moneyline vs spread). More complex but can find unique opportunities.
💱 Exchange Arbitrage
Back vs Lay
Arb between betting exchanges and traditional books. Back at book, lay at exchange for guaranteed profit.
Risks of Arbitrage Betting
Account Limitations
Sportsbooks limit or close accounts of known arbers. You may be restricted to minimum bets or banned entirely. Use multiple books and avoid patterns.
Odds Changes
Odds can change while you're placing bets. If one side moves unfavorably, you may be left with an unmatched bet and potential loss.
Bet Cancellation
If a book cancels a bet (e.g., obvious error), you're left with unmatched positions. This can turn a guaranteed profit into a loss.
Calculation Errors
Mistakes in stake calculation can eliminate profit or create losses. Always use arbitrage calculators to verify.
Tax Implications
Arbitrage profits are taxable income. Track all bets and profits for tax reporting. Professional arbers may face different tax treatment.
Capital Requirements
Profits are small (1-5%). To make meaningful money, you need large bankrolls spread across multiple books. $10,000+ recommended.
Essential Arbitrage Tools
🧮 Arbitrage Calculator
Calculate stakes for 2-way and 3-way arbs instantly. Avoid manual calculation errors.
📊 Odds Comparison Sites
Compare odds across multiple sportsbooks to identify discrepancies. Many sites offer free odds comparison.
🔔 Arb Alert Services
Paid services that scan for arbitrage opportunities and send alerts. Essential for serious arbers.
📱 Multiple Book Accounts
Have funded accounts at 10+ sportsbooks. Speed is critical — you need to place bets immediately.
📝 Bet Tracking Software
Track all your arbs, profits, and account balances. Essential for tax reporting and avoiding mistakes.
How to Place an Arbitrage Bet
Find Opportunity
Use odds comparison or arb alerts to find total probability under 100%.
Convert to Decimal
Convert all odds to decimal format for calculation.
Calculate Stakes
Use arbitrage calculator to determine exact stakes for each outcome.
Place Bets Quickly
Place all bets as fast as possible. Have accounts funded and ready.
Collect Profit
After event, collect guaranteed profit. Track for tax purposes.
❓ Frequently Asked Questions
What is arbitrage betting?
Arbitrage betting (arb) is a technique that guarantees profit by placing bets on all possible outcomes of an event across different sportsbooks. When odds create an opportunity where the implied probability totals less than 100%, you can lock in profit regardless of the result.
How does arbitrage betting work?
Find odds where the sum of implied probabilities is under 100%. Calculate stakes to guarantee equal return on all outcomes. Place bets at different sportsbooks. Profit is the difference between your total stake and the guaranteed return.
Is arbitrage betting legal?
Yes, arbitrage betting is legal. You're simply taking advantage of market inefficiencies. However, sportsbooks may limit or close accounts of known arbers because they profit at the bookmaker's expense.
How much can you make from arbitrage betting?
Typical arbitrage opportunities yield 1-5% profit. With large stakes and many opportunities, some arbers make consistent income. However, it requires significant capital, multiple sportsbook accounts, and time to find opportunities.
What are the risks of arbitrage betting?
1) Account limitations/gubbing. 2) Odds changing before you place all bets. 3) Mistaken calculations. 4) Bet cancellation voiding one side. 5) Tax implications on profits. 6) Requires significant bankroll. More details →
What is the difference between arbitrage and matched betting?
Matched betting uses free bets and promotions to guarantee profit. Arbitrage exploits odds discrepancies without promotions. Matched betting is more sustainable long-term but requires promotions. Arbitrage leads to faster account limits.
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