Arbitrage Bet Finder: How to Find Guaranteed Profit Opportunities (2026)
Find arbitrage opportunities across prediction markets and sportsbooks with ArbBets. We scan 990+ markets on Polymarket, Kalshi, and Opinion to find 70-100 profitable opportunities daily.
TL;DR
An arbitrage bet finder scans multiple betting platforms to identify price discrepancies that guarantee profit. In 2026, the biggest opportunities are in prediction markets—Polymarket, Kalshi, and Opinion often price the same events differently, creating 4-8% ROI opportunities. Traditional sports arbitrage offers 1-3% but with faster settlement. ArbBets scans both markets to find 70-100 daily opportunities.
What Is an Arbitrage Bet Finder?
An arbitrage bet finder is software that monitors odds and prices across multiple platforms simultaneously. When it detects that the same event is priced differently on two platforms, it alerts you to a guaranteed profit opportunity.
The Core Concept
Every betting market has two sides: Yes/No, Win/Lose, Over/Under. In an efficient market, the prices sum to 100% (or slightly over, accounting for the house edge).
When platforms price differently:
- Platform A: Yes 60¢, No 45¢ (total: 105¢)
- Platform B: Yes 55¢, No 50¢ (total: 105¢)
You can buy Yes on B (55¢) and No on A (45¢):
- Total cost: 100¢
- Guaranteed payout: $1
- Profit: 0¢
But when mispricing occurs:
- Platform A: Yes 58¢, No 35¢
- Platform B: Yes 65¢, No 38¢
Buy Yes on A (58¢) and No on A (35¢):
- Total cost: 93¢
- Guaranteed payout: $1
- Profit: 7¢ = 7.5% ROI
An arbitrage bet finder automates finding these mismatches across hundreds of markets.
Why Prediction Markets Offer Better Arbitrage
| Factor | Sports Betting | Prediction Markets |
|---|---|---|
| Typical ROI | 1-3% | 4-8% |
| Why prices differ | Sharp bettors correct quickly | Different user bases, slower correction |
| Account limits | Common | Rare |
| Competition | High | Growing but lower |
| Best platforms | Pinnacle, Bet365, US books | Polymarket, Kalshi, Opinion |
Why the Difference?
Sports betting attracts professional bettors ("sharps") who quickly arbitrage away inefficiencies. Books also limit winning accounts.
Prediction markets attract different audiences:
- Polymarket: Crypto-native, international traders
- Kalshi: US retail investors, CFTC-regulated
- Opinion: Newer platform, different liquidity
These different user bases create persistent pricing gaps. A US-focused event might trade cheaper on Kalshi while Polymarket prices in international sentiment differently.
Learn more: Polymarket vs Kalshi Comparison
How Arbitrage Bet Finders Work
1. Data Collection
The finder connects to multiple platforms via APIs or web scraping:
- Pulls current prices for all markets
- Matches identical events across platforms
- Updates continuously (ideally sub-minute)
2. Opportunity Detection
For each matched market, calculates:
Arbitrage % = (1 - (Best Yes Price + Best No Price)) × 100
If positive, arbitrage exists.
3. Alert Delivery
When opportunities appear:
- Push notification to your device
- Email alert
- Dashboard update
- Shows exact prices and recommended stakes
4. Execution Support
Good finders provide:
- Direct links to place trades
- Optimal stake calculations
- Net profit after fees
Current Prediction Market Opportunities
| Market | Platform A | Platform B | Cost | Payout | ROI |
|---|---|---|---|---|---|
| LA Mayoral Election | Kalshi: Yes 58¢ | Polymarket: No 35¢ | 93¢ | $1.00 | 7.53% |
| Venezuela Leadership | Kalshi: No 89¢ | Polymarket: Yes 6¢ | 95¢ | $1.00 | 5.26% |
| Fed Rate Decision | Kalshi: Yes 72¢ | Polymarket: No 24¢ | 96¢ | $1.00 | 4.17% |
| SpaceX IPO >$1T | Polymarket: Yes 73¢ | Opinion: No 22¢ | 95¢ | $1.00 | 5.26% |
Prices change constantly. Check ArbBets for real-time opportunities.
Step-by-Step: Using an Arbitrage Bet Finder
Step 1: Platform Setup
Create and fund accounts on:
Prediction Markets:
- Polymarket — Requires crypto wallet with USDC
- Kalshi — Bank transfer or debit (US only, fully legal)
- Opinion — Crypto-based, similar to Polymarket
Sportsbooks (optional):
- 3-5 books available in your jurisdiction
Step 2: Tool Configuration
Set up your arbitrage finder:
- Connect to your preferred platforms
- Set minimum ROI alerts (recommend 3%+)
- Enable push notifications
- Set position size limits
Step 3: Monitor and Act
When an alert arrives:
- Verify the opportunity still exists
- Open both platform trading pages
- Place the less liquid trade first (usually Kalshi)
- Immediately place the second trade
- Confirm both orders executed at expected prices
Step 4: Wait for Settlement
Once both trades execute, your profit is locked. Wait for the event to resolve and collect your payout.
Manual vs Automated Finding
| Aspect | Manual Scanning | Arbitrage Bet Finder |
|---|---|---|
| Time required | 2-4 hours/day | Minutes/day |
| Opportunities found | 5-10 daily | 70-100 daily |
| Accuracy | Error-prone | Precise calculations |
| Speed | Too slow for most arbs | Real-time alerts |
| Coverage | 10-20 markets realistic | 990+ markets |
| Cost | Free (but time cost) | Subscription |
The math: If your time is worth $25/hour and manual scanning takes 3 hours to find 5 opportunities, you're paying $15 per opportunity found. A $50/month tool finding 50+ opportunities costs $1 each.
Features to Look For
Must-Have Features
- Prediction market coverage — Polymarket, Kalshi, Opinion
- Real-time updates — Sub-minute refresh rates
- Mobile alerts — Push notifications for new opportunities
- Accurate matching — Correct event identification
- Fee calculation — Shows net profit, not just gross
Nice-to-Have Features
- API access for custom automations
- Historical data and analytics
- Sportsbook coverage (if you trade both markets)
- Stake optimization calculator
Common Mistakes to Avoid
1. Slow Execution
Opportunities last minutes. If you take 5 minutes between trades, prices will move. Have both platforms ready before acting.
2. Wrong Market Matching
"Trump wins election" vs "Trump wins popular vote" are different markets. Always verify you're trading the exact same event.
3. Ignoring Fees
Kalshi charges 0-1% per trade. A 2% arb becomes 0% after fees. Always calculate net profit.
4. Overleveraging
Don't put all funds in one arb. Spread across multiple opportunities to manage execution risk.
5. Ignoring Settlement Time
A 5% arb on an event 2 years away ties up capital too long. Prioritize near-term events.
Frequently Asked Questions
How much money do I need to start?
$500-1,000 split across platforms is a good starting point. Smaller amounts work but limit which opportunities are profitable after fees.
Is this legal?
Yes. Arbitrage is a standard trading strategy. Kalshi is CFTC-regulated and fully legal for US residents. Sportsbook arbitrage is legal where sports betting is legal.
How much can I make?
Depends on capital and activity level. With $5,000 across platforms and active trading, expect $150-400/month. Returns scale with bankroll.
Will I get banned?
Sportsbooks sometimes limit winning accounts. Prediction markets generally don't—you're providing liquidity and price discovery.
Do I need to predict outcomes correctly?
No. That's the beauty of arbitrage—you profit regardless of outcome. You're exploiting pricing inefficiency, not making predictions.
Getting Started
Arbitrage bet finders transform a time-intensive manual process into an efficient profit strategy. The best opportunities today are in prediction markets, where platform differences create 4-8% ROI opportunities that traditional sports betting rarely matches.
Ready to find arbitrage opportunities? Try ArbBets and start scanning Polymarket, Kalshi, and Opinion for 70-100 daily profit opportunities.