Matched Betting Calculator
Calculate profits from bookmaker promotions using matched betting
Formula:Profit = Free Bet Return - Qualifying Loss
Offer Type
Bet X and get Y free bet (e.g., Bet $50 Get $50)
Exchange Settings
Your betting exchange commission rate
%
Qualifying Bet
The bet needed to unlock the free bet
$
Free Bet
Stake Not Returned free bet
$
Higher odds = more profit
Matched Betting Results
Your expected profit breakdown
Total Expected Profit
$35
73.8% of free bet value
Qualifying Bet
Back Bet
$50 @ 2
Lay Stake
$50
Lay Liability
$52
Qualifying Loss
+$2
Free Bet Extraction (SNR)
Free Bet
$50 @ 5
Lay Stake
$39
Lay Liability
$163
Guaranteed Profit
+$37
Qualify Lay
$50
Qualify Liability
$52
Free Bet Lay
$39
FB Retention
73.8%
Pro Tip: For free bets, use higher back odds (5.0+) to maximize profit retention. The closer the back and lay odds, the higher your profit percentage. Expect to lose 2-5% on qualifying bets - this is normal.
Try These Examples
Common matched betting scenarios
Matched Betting Tracker
0 / 100 entries
Bet History
0 entries
No bets recorded yet.
Add your first bet to start tracking.
How Matched Betting Works
Step-by-step guide
Example: Bet $50 Get $50 Free Bet
- 1. Qualifying Bet: Back $50 @ 2.00 with bookmaker, Lay ~$49 @ 2.04 on exchange
- 2. Qualifying Loss: ~$1-$2 (2-4% of stake) - this is expected
- 3. Receive Free Bet: $50 SNR free bet credited to account
- 4. Extract Free Bet: Back $50 @ 5.00, Lay ~$38 @ 5.20
- 5. Total Profit: ~$36-$38 guaranteed (minus qualifying loss)
Quick Answer
TL;DR summary
Matched betting uses bookmaker bonuses to guarantee profit by backing with the bookmaker and laying on an exchange. A typical $50 free bet (SNR) at odds of 5.00, laid at 5.20 with 5% commission, yields ~$38 guaranteed profit. The key is calculating the correct lay stake to balance outcomes. Qualifying bets typically cost 2-5% of stake to unlock bonuses worth 60-95% of face value.
Key Facts About Matched Betting
Important things to know
- Matched betting is mathematically risk-free when done correctly
- Qualifying bets cost 2-5% due to odds differences and commission
- Free bet returns depend on odds used - higher odds = higher returns
- SNR (Stake Not Returned) free bets typically return 70-80% of face value
- SR (Stake Returned) free bets return 90-95% of face value
- Risk-free bets can return 70-90% of the stake value
- Odds boosts require checking if the boost creates genuine value
- Always read bonus terms - wagering requirements, min odds, etc.
Frequently Asked Questions
Common questions about matched betting
What is matched betting?
Matched betting is a technique that uses bookmaker promotions (free bets, bonuses) to guarantee profit. You place a back bet with the bookmaker and an opposing lay bet on a betting exchange. The correct lay stake ensures the same profit regardless of outcome, while the free bet provides the profit.
Is matched betting legal?
Yes, matched betting is completely legal. You're simply taking advantage of promotional offers that bookmakers provide to attract customers. However, bookmakers may limit or close accounts of customers they suspect are matched betting, so discretion is advised.
How much can I make from matched betting?
Returns vary based on available offers. A typical sign-up offer might yield $30-50 profit per bookmaker. Regular ongoing promotions can generate $200-500+ per month for active users. Initial sign-up offers across all bookmakers can total $500-1500+ in profit.
What is a qualifying bet?
A qualifying bet is a real-money bet placed to unlock a free bet bonus. By matching this bet on an exchange, you minimize the loss (typically 2-5% of stake). This small "qualifying loss" is the cost of accessing the much more valuable free bet.
What's the difference between SNR and SR free bets?
SNR (Stake Not Returned) - If you win, you only receive the profit, not the stake. Most common type. SR (Stake Returned) - If you win, you receive both the profit AND the original stake. More valuable but less common.
What equipment do I need for matched betting?
You need: (1) A betting exchange account (Betfair, Smarkets), (2) Bookmaker accounts for offers, (3) A matched betting calculator, (4) Starting bankroll of $100-200 to cover qualifying bets and exchange liability. The calculator is the most important tool.
How this works
Calculations follow the published mathematics of the game — combinatorics for cards, probability theory for dice, and expected-value accounting for wagers. Results are verified against independent references (primarily Wizard of Odds). No calculation here is an opinion or recommendation; it is arithmetic applied to the rules of the game.
What this tool can’t do
When to consult a professional
This tool computes probability and expected value. It is not a betting system and cannot predict the outcome of any individual wager. If gambling is causing problems for you or someone you know, call the National Problem Gambling Helpline at 1-800-GAMBLER.
Sources
- [1]Wizard of Odds — Michael Shackleford, ASAIndustrywizardofodds.comAccessed Apr 21, 2026
Actuary; widely cited casino-game probability reference. Used for house-edge and EV verification.
- [2]National Council on Problem GamblingOfficial sourcencpgambling.orgAccessed Apr 21, 2026
Responsible-gambling guidance and 1-800-GAMBLER helpline.
Joseph OrdunaFounder & Software Engineer
Full-stack software engineer specializing in embedded systems, web architecture, and AI/ML. Founder of Practical Web Tools. Built the gesture-controlled drone IP acquired by KD Interactive (Aura Drone, sold on Amazon).