Betfair Commission Calculator — Effective Odds & Break-Even
See your real return and break-even strike rate after exchange commission.
Betting exchanges take a commission on your net winnings, so the odds you back at aren’t quite the odds you get. This calculator shows your effective odds, your net profit after commission, and the strike rate you need just to break even.
Pick your state’s typical commission rate or enter a custom figure, add the odds and stake, and it does the rest.
How it works
Commission applies to your profit on a winning bet, not your stake. So at $3.00 with 10% commission, your $2.00 profit becomes $1.80 — effective odds of $2.80.
Your break-even strike rate is one divided by the effective odds: the share of bets at that price you’d need to win just to stand still.
effective odds = 1 + (odds − 1) × (1 − commission) · break-even = 1 ÷ effective odds
Worked example
- Profit before commission: $200
- Commission: $20 (10% of $200)
- Net profit: $180 → effective odds $2.80
- Break-even strike rate: 35.7%
FAQ
- Is Betfair commission charged on losing bets?
- No. Commission is taken only from your net winnings on a market, never from your stake or from losing bets.
- What commission rate should I use?
- It varies by jurisdiction and account. Use your actual rate; the presets are common Australian starting points, not advice.
- Why do effective odds matter?
- They’re your true price after the cut — essential for comparing an exchange against a fixed-odds bookmaker and for honest record-keeping.
This nets one bet after commission. Edge Protocol bakes commission into every stake and tracks your true, after-fees edge.
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