Contents
ROI (Return on Investment) is the key metric for measuring betting success. It tells you how much profit you make per dollar wagered.
Calculating ROI
ROI = (Profit / Total Staked) × 100%
Example
- Total wagered: $10,000
- Total returned: $10,500
- Profit: $500
ROI = ($500 / $10,000) × 100% = 5%
Use our ROI Calculator for instant results.
What's a Good ROI?
| ROI | Level | Reality |
|---|---|---|
| > 10% | Elite | Top 1% of bettors |
| 5-10% | Excellent | Professional level |
| 2-5% | Good | Sustainable profit |
| 0-2% | Break-even | Covering costs |
| < 0% | Losing | Need to improve |
Important: Even 3% ROI is excellent over thousands of bets.
Sample Size Matters
ROI is meaningless without enough bets:
| Bets | Reliability |
|---|---|
| 50 | Very low (high variance) |
| 100 | Low |
| 500 | Moderate |
| 1000+ | High |
Variance Example
With true 3% ROI and 100 bets:
- 5% chance of -10% result
- 5% chance of +16% result
At 1000 bets, range narrows significantly.
ROI vs Yield
Often used interchangeably, but technically:
- ROI: Profit / Capital deployed
- Yield: Profit / Total turnover (same formula)
In betting, they mean the same thing.
Tracking Your ROI
Use our Bet Tracker to record:
- Every bet placed
- Stakes and odds
- Results
- Running ROI
What to Track
| Field | Why |
|---|---|
| Sport | Which sports are you best at? |
| Market | 1X2 vs handicap vs totals |
| Odds range | High vs low odds performance |
| Bookmaker | Which offers best value? |
ROI by Betting Type
Pre-match vs Live
Many bettors perform differently in live betting vs pre-match.
Singles vs Accumulators
Accumulators often have lower ROI due to compounded margin.
Favorites vs Underdogs
Public money on favorites can create value on underdogs.
Improving Your ROI
- Specialize, Focus on leagues/sports you know best
- Line shop, Compare odds across bookmakers
- Track data, Identify your strengths and weaknesses
- Cut losers, Stop betting on consistently unprofitable areas
- Use tools, Margin calculator, EV calculator
Common Mistakes
Cherry-picking periods
"I was +20% last month", but -5% over 6 months.
Ignoring variance
Short-term results are noise. Trust long-term data.
Not accounting for bonuses
Include bonus money in calculations for accurate ROI.
Related Tools
Conclusion
ROI is the ultimate measure of betting success. Track it religiously, wait for adequate sample size, and use the data to improve.
Target: 3-5% ROI over 500+ bets is excellent.
Evgeniy Volkov
Verified ExpertFullstack developer with a background in mathematics. I build the calculators and game-style tools on ToolsGambling with Pixi.js and modern web tech, and every result uses transparent probability formulas you can verify yourself.