Betfair Commission Calculator
Deduct commission from winning lays or backs.
Enter stake, odds, and commission percent on net winnings.
Betfair Calculator
Adjust inputs to see updated results.
Table of Contents
How to Use This Calculator
Enter stake, decimal odds, and commission rate on net win (e.g. 0.05 for 5%). The tool shows gross win, commission paid, and net win.
Net win definition
Profit before commission = stake × (decimal − 1) on a winning back bet.
Commission %
Match your exchange’s rate—some tiers differ by activity.
Net after fee
What you keep after the platform takes its slice of profit.
Lay side
For lays, profit definition differs—this widget assumes standard back-bet win profit.
Net Win After Fee
Commission = gross win × rate; Net = gross × (1 − rate)
Examples
Example 1 — Defaults
Stake 100, odds 3.00, commission 5% → gross 200, fee 10, net 190.
Example 2 — Lower commission
2% tier reduces fee—plug 0.02.
Example 3 — Compare to sportsbook
Add commission-aware EV when shopping exchange vs traditional book.
Frequently Asked Questions
Typically commission hits net winning markets—verify current rules.
Convert to decimal for the odds field.
Math identical—only the commission rate changes.
Enter the effective rate during the promo window.
No—those are account-level—model separately.
