An exchange commission calculator converts a gross exchange odds into the net odds after deducting the commission charged on winning bets. Because exchanges charge commission instead of building margin into odds, knowing the true net price is essential for comparing exchange value against bookmaker odds.
Enter the exchange odds and commission rate. The calculator shows your net odds, net profit, and how much commission you pay in euros on a given stake.
How to Calculate Net Odds After Commission
- 1Enter the exchange odds — the decimal odds shown on the exchange before commission.
- 2Enter your commission rate — BFB247 charges 2.5%, Betfair standard is 5%, Smarkets is 2%.
- 3Enter your stake — to see the exact commission amount and net profit in euros.
Exchange Commission Formula: A Worked Example
Net odds formula
Net odds = 1 + (Gross odds − 1) × (1 − Commission rate)
Example: €100 stake at 3.00 odds
At 5% commission: Net odds = 1 + (3.00 − 1) × 0.95 = 1 + 1.90 = 2.90
At 2.5% commission: Net odds = 1 + 2.00 × 0.975 = 2.95
On a €100 stake at 3.00: 5% commission costs €10 in profit. 2.5% costs €5. Over hundreds of bets, this difference is substantial.
Effect on matched betting lay stake
The matched betting calculator uses net odds when computing lay stakes. Lower commission means a smaller lay stake is needed, which reduces liability and qualifying loss.
Comparing Exchange Commission Rates
| Exchange | Standard rate | Net on 3.00 |
|---|---|---|
| BFB247 | 2.5% | 2.95 |
| Smarkets | 2% | 2.96 |
| Betfair (standard) | 5% | 2.90 |
| Betfair (premium) | Up to 60% | Varies |
Common Mistakes with Exchange Commission
- ✕Entering gross odds in the matched betting calculator. If you enter exchange lay odds without accounting for commission, the calculated lay stake is too low and the outcome with your lay winning is underhedged.
- ✕Ignoring Betfair premium charges. High-volume winning accounts on Betfair are subject to premium charges of up to 60% on profits. This dramatically changes the net odds and can make matched betting on Betfair unviable at scale.
- ✕Commission applying to lay bets. On most exchanges, commission is only charged on back bet winnings (net profit), not on lay bets. Some users incorrectly factor commission into the wrong side.
Frequently Asked Questions
How does betting exchange commission work?
Exchanges charge a percentage of your net winnings on each market. If you back at 3.00 for €100 and win, your gross profit is €200. At 5% commission, you pay €10, keeping €190. Net odds become 2.90.
Does commission apply to lay bets?
On most exchanges, commission is only charged on back bet profits. Lay bets — where you win when the selection loses — are typically exempt from commission. Always check your specific exchange's terms.
Which exchange has the lowest commission?
Smarkets charges 2%. BFB247 charges 2.5%. Betfair standard is 5% with premium charges on high-volume winning accounts that can reach 60%. For matched betting, lower commission directly reduces qualifying losses on every bet.
How much does commission cost over 100 bets?
At €100 average stake, average back odds of 3.0, and 50% strike rate: gross profit over 100 bets is ~€5,000. At 5% commission you pay €250; at 2.5% you pay €125. That €125 difference compounds significantly over a month of matched betting.
The matched betting calculator uses net odds automatically when you enter your commission rate. Lower commission = smaller qualifying losses on every single bet.