Prophet Exchange commission calculator
- Commission model
- net winnings
- Rate (placeholder)
- 3%
- Even money after commission
- 1.970
- Lay bets
- yes
- American odds are never between -100 and +100.
The calculator above starts with Prophet Exchange's commission model selected. Enter a price and a stake to see the effective odds, the net profit on a win, the break-even win rate and the bookmaker price you would need to beat.
Effective odds at Prophet Exchange
| Odds | Effective | American | Break-even | Net profit on 100 |
|---|---|---|---|---|
| 1.50 | 1.485 | -206 | 67.34% | 48.50 |
| 1.91 | 1.883 | -113 | 53.12% | 88.27 |
| 2.00 | 1.970 | -103 | 50.76% | 97.00 |
| 2.50 | 2.455 | +146 | 40.73% | 145.50 |
| 3.00 | 2.940 | +194 | 34.01% | 194.00 |
| 5.00 | 4.880 | +388 | 20.49% | 388.00 |
| 10.00 | 9.730 | +873 | 10.28% | 873.00 |
Because commission comes off profit only, the effect grows with the odds. Short prices lose very little; long prices lose a meaningful slice. A bettor who mostly backs favourites therefore feels 3% commission far less than one who backs outsiders.
Lay bets
Laying at Prophet Exchange reverses the bet: you accept a backer's stake and risk a liability of stake × (odds − 1). Commission is charged on your profit when the outcome loses. Switch the calculator to "lay" to see liability, profit after commission and break-even for a lay at any price.
Comparing with a bookmaker
The honest comparison between an exchange price and a bookmaker price is after commission. Take the exchange price, apply Prophet Exchange's rate, and read off the effective odds; if the bookmaker offers more than that, the bookmaker is the better bet. The break-even column is the same comparison expressed as a win rate: a bookmaker price whose implied probability is below the exchange's break-even rate beats the exchange.
When the rate changes
Commission is not fixed. Exchanges vary it by country, discount activity-based tiers apply, and promotional rates come and go. The calculator's custom option lets you type any rate, and the table above shows how much a percentage point of commission is worth at each price: at even money one point costs about half a hundredth of a decimal point, at 10.00 it costs nearly a tenth.
Frequently asked questions
What does 3% commission do to my odds at Prophet Exchange?
On net winnings, commission takes 3% of the profit on a win and nothing on a loss. Even money becomes 1.970; the effect is larger at longer odds because the profit slice is larger.
What bookmaker price equals a Prophet Exchange price?
The break-even odds shown by the calculator: a bookmaker offering more than that beats Prophet Exchange after commission, one offering less does not.
How is a lay bet's liability calculated?
Liability = backer's stake × (odds − 1). If you lay 100 at 2.10, you risk 110 to win 100 minus commission.
Is the 3% figure current?
No guarantee. It was entered as a placeholder on 2026-09-09 without checking Prophet Exchange's schedule. Confirm it in your account and edit the rate in the calculator.