A betting ROI calculator measures how much profit you generate relative to your total stakes. It is the single most useful metric for evaluating betting performance over time because it strips out stake size and lets you compare results fairly across different bet sizes and periods.
Enter each bet as a row with its stake and returns to get your ROI percentage and profit across your full history. Results update automatically as you add rows.
How to Use the Betting ROI Calculator
- 1Add a bet row, enter the stake for each individual bet in the Stake ($) field, or click Quick Fill to load a sample data set instantly.
- 2Set the outcome, select Win or Loss from the Outcome dropdown for each bet row.
- 3Enter returns, enter the total amount returned for winning bets, including your returned stake. Enter 0 for losing bets.
- 4Add more rows, click Add Another Bet to track multiple wagers. Remove any row with the delete button.
- 5Read your ROI, the ROI percentage, net profit, and win rate update automatically in the results panel as you enter or edit bets.
The ROI Formula Explained
ROI formula
ROI (%) = ((Total returns - Total stakes) / Total stakes) × 100
Example
You placed €2,000 in bets over a month and received €2,180 in returns.
ROI = ((2180 - 2000) / 2000) × 100 = +9%
Profit: €180. A +9% ROI over meaningful volume is strong in matched betting.
ROI vs Yield vs Turnover
Turnover is the total amount staked across every bet, added up regardless of whether each bet won or lost. Both ROI and yield divide net profit by turnover; in matched betting the two terms are used interchangeably and produce the same number. Turnover is the reason two bettors can post identical profit but very different ROI, since ROI depends on how much was risked to get there. See Example 2 in the worked examples below.
What Is a Good ROI in Matched Betting?
In matched betting, ROI depends on the type of offers being worked. Sign-up offers typically return 50-80% ROI on the qualifying stake because you are converting a free bet into guaranteed cash. Reload offers and ongoing promotions tend to return 5-20% ROI per offer.
Volume matters more than individual ROI. A 5% ROI on €10,000 in monthly stakes is €500. Using the volume betting calculator helps estimate how many bets you need to hit a target monthly profit.
Common ROI Tracking Mistakes
- xCounting stakes as returns. Only count actual winnings received, not your original stake unless it was returned as part of a winning bet.
- xCalculating ROI over too few bets. ROI over 10 bets is noise. Over 100+ bets, it becomes meaningful. Short-term variance can make a losing strategy look profitable.
- xIgnoring qualifying losses in total stakes. Include every bet placed, including qualifying bets that lost, in your total stakes figure. Otherwise your ROI is inflated.
ROI Worked Examples
Three step-by-step calculations using the same formula as the calculator above: ROI (%) = (Net profit / Total staked) x 100. Work through the arithmetic once and the same logic applies at any stake size or bet count.
Example 1: Flat-stakes bettor over 200 bets
A bettor places 200 bets at a flat $25 stake and settles the month with $5,150 returned in total.
A +3% ROI across 200 bets is a real, if modest, long-term edge. It would take a losing run well outside normal variance to erase this over the next 200 bets.
Example 2: Same profit, different turnover
Bettor A stakes $2,000 across a month and ends up $200 in profit. Bettor B stakes $10,000 over the same period and also ends up exactly $200 in profit.
Same dollar profit, but Bettor A generated it from a fifth of the turnover. Profit alone hides this difference; ROI (or yield) is what makes the two performances comparable.
Example 3: Negative ROI and the break-even point
A bettor places 50 bets at a flat $40 stake ($2,000 total staked) and receives $1,850 back across the sample.
Break-even is the point where total returns equal total staked, ROI = 0%. This bettor needed $150 more in returns (a total of $2,000 back) just to reach break-even, before any profit begins.
Frequently Asked Questions
What is ROI in sports betting?
ROI (Return on Investment) measures your profit as a percentage of total stakes. A +5% ROI means for every €100 staked you return €105 on average. It is the standard metric for evaluating betting performance over time.
What is a good ROI in sports betting?
Good ROI in straight sports betting is much lower than in matched betting, where offers are close to risk-free. Long-term profitable sports bettors typically sustain a 2-8% yield on turnover across large sample sizes. Consistent double-digit ROI over hundreds of bets is rare and should be treated with caution; short-term variance easily produces misleading numbers.
What is a good ROI in matched betting?
Sign-up offers can generate 50-80% ROI on the qualifying stake. Reload offers and loyalty bonuses typically return 5-20%. The key metric is monthly profit in euros, which depends on both ROI and volume.
How is betting ROI different from yield?
ROI uses total investment (stakes paid out, regardless of outcome) as the denominator. Yield typically refers to profit as a percentage of turnover. In most matched betting contexts the terms are used interchangeably.
Can I calculate expected monthly profit from ROI?
Yes. If your ROI is 8% and you stake €3,000 per month, your expected profit is €240. Use the volume betting calculator to estimate monthly profit based on bet frequency and average stake.