The most common question new arbitrage bettors ask is some version of this: which books are actually the best ones to arb with? It usually shows up right after someone finds their first arb and realizes they only have accounts at two sportsbooks — which means most of the opportunities on their screen are unplaceable.
Here's the honest answer, and it's not the one most guides give you.
The short version: there is no single best sportsbook for arbitrage. Arbs exist between books, so your edge is how many books you can reach, not which one you love. The strongest 2026 setup is three to five mainstream sportsbooks for volume, one low-vig exchange as an account that never gets limited, and one prediction market to cover the markets — and the states — that sportsbooks don't.
This guide covers which venues belong in that portfolio, how to split your bankroll across them, what happens when a book decides it doesn't want your action anymore, and how the answer changes depending on where you live.
What Makes a Sportsbook Good for Arbitrage
Before naming books, it's worth being clear about what you're actually screening for. A book that's great for a parlay bettor can be useless for arbing, and vice versa.
| What matters | Why it matters for arbing |
|---|---|
| Its own opinion on lines | A book that copies the market never disagrees with anyone. A book that prices independently — or is just slow to move — is where the other side of your arb comes from. |
| How long the account lasts | Every book eventually notices consistent winners. The books that tolerate you longest do more work over a season than the one with the best single price today. |
| Market depth | More markets — props, alternates, second-half lines — means more surface area for prices to disagree. Main-line-only books produce fewer arbs. |
| Settlement speed | Your bankroll can only work as fast as it comes back. A book that holds settled funds for days quietly caps how many arbs you can place. |
| Promos on top | Bonus bets and odds boosts stack on top of the base arb. A bonus bet converter turns those into real cash rather than dead credit. |
Notice that "best odds" isn't on the list. For arbitrage you don't want a book with consistently good prices — you want a book whose prices are different. If you're still getting comfortable with the underlying math, start with what arbitrage betting is and how it works, then come back.
The Four Types of Venue Worth Having
Almost every arb you'll ever place is between two of these four categories. Understanding what each one is for makes the specific book names much easier to sort.
| Category | Examples | Role in your portfolio | Watch-out |
|---|---|---|---|
| Mainstream sportsbooks | DraftKings, FanDuel, BetMGM, Caesars, bet365 | Deep liquidity, most of your daily volume, most promos | Will limit consistent winners eventually |
| Secondary & regional books | BetRivers, Fanatics, Hard Rock Bet, theScore Bet, Bally Bet | Outlier prices, especially on secondary markets; slower to limit | Thinner limits, narrower market coverage |
| Low-vig exchanges | Novig, ProphetX, Sporttrade, BetOpenly | Peer-priced markets with little to no vig; no reason to limit winners | Liquidity varies by market; commission on winnings |
| Prediction markets | Kalshi, Polymarket, Robinhood | Federally regulated, available in states with no sportsbooks; often the widest price gaps | Per-contract fees; state availability is in flux |
Best Mainstream Sportsbooks for Arbitrage
These are the accounts that will place most of your bets. Open several — the point is coverage, not picking a favorite.
DraftKings
The widest state footprint of any US book and enormous market depth, including deep props and alternate lines. That depth is why DraftKings appears on one side of a huge share of arbs. Lines are reasonably sharp on mains but far looser on secondary markets, which is exactly where you want to be looking.
FanDuel
Slightly sharper than DraftKings on main lines, but with its own pricing model — which means it regularly disagrees with the field. Same-game and alternate markets are where FanDuel most often ends up as the other leg.
BetMGM
Widely regarded as one of the softer of the major books, with lines that move more slowly after news. That softness is genuinely useful, and it's also why BetMGM is commonly reported as one of the quicker books to restrict winning accounts. Use it, and don't be surprised when it tightens.
Caesars Sportsbook
Aggressive promotional calendar and pricing that often lags the market on non-marquee events. The promo volume is a real secondary benefit — boosts and bonus bets convert well when you already have the other side covered.
bet365
Enormous market coverage, including plenty of international and lower-tier leagues that US books price thinly or not at all. Those niche markets are consistently productive. bet365 also has a reputation for being quick to restrict sharp play.
BetRivers
The one the arbitrage community most often names as the slowest of the majors to limit. Market coverage is narrower than DraftKings or FanDuel, but an account that stays open through a full season is worth more than a slightly better price today.
Also worth an account
Fanatics Sportsbook (heavy promotional volume as it grows share), theScore Bet (the rebranded PENN app after the ESPN BET partnership ended in late 2025), Hard Rock Bet, Bally Bet, and — where available — Circa Sports, which is unusual among US books in publicly welcoming sharp action.
On limiting speed: you'll find tables online that claim a specific number of weeks before each book restricts you. Treat them with real skepticism. No sportsbook publishes its limiting criteria, and those numbers come from affiliate sites' own estimates, which disagree with each other by months. The directional consensus in the arbitrage community — BetMGM and bet365 among the fastest, BetRivers among the slowest — is about as much as anyone can honestly say.
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Best Betting Exchanges for Arbitrage
This is the part of the answer that changed most in 2026, and it's the part most older guides get wrong.
Betting exchanges match you against other bettors instead of against the house. They make money on commission, not on your losses — so unlike a sportsbook, an exchange has no structural reason to shut down a winning account. For an arbitrage bettor, that makes an exchange the closest thing to a permanent home base.
In mid-2026, Novig and ProphetX both became CFTC-regulated exchanges and expanded well beyond the handful of states they previously operated in — which means most US bettors can now open one, including bettors in states with no legal sportsbook at all.
| Exchange | Where it's available | What it costs | Limits winners? |
|---|---|---|---|
| Novig | Nearly nationwide after CFTC approval in June 2026 | No vig on peer-matched markets | No structural reason to |
| ProphetX | Nearly nationwide after CFTC approval in June 2026 | Commission on net winnings only | No structural reason to |
| Sporttrade | A handful of state-licensed markets, with wider approval pending | Commission on net profits only | No structural reason to |
| BetOpenly | Peer-to-peer marketplace, multi-state | Roughly 1% versus the ~4.5% vig typical of a sportsbook | States that it does not |
Availability and fee structures in this category are moving quickly — confirm on the platform before you fund an account.
The practical move: use an exchange as the leg that's always there. When a mainstream book limits you to $12 a bet, the exchange side of your portfolio is still fully open.
Prediction Markets: Where the Widest Gaps Live
Prediction markets let you buy and sell event contracts that settle at $1 if an outcome happens and $0 if it doesn't. A contract trading at 48¢ is simply a 48% implied probability — which makes it trivially easy to line up against a sportsbook price.
Because these platforms attract a different crowd than sportsbooks — finance-minded traders rather than sports bettors — they price the same games differently, and the gaps are frequently wider than anything you'll find between two sportsbooks. Kalshi and Polymarket are the two largest; Robinhood routes sports contracts through Kalshi inside its brokerage app, and both DraftKings and FanDuel launched their own prediction-market products in 2026.
The fees are the catch, and they're the thing most guides skip. Per-contract fees are highest on contracts priced near 50¢ and can erase a thin edge entirely, so net them out before you place. Our prediction market calculator converts contract prices into betting odds, and there's a full walkthrough in our guide to Kalshi arbitrage betting and to finding Kalshi vs Polymarket edges.
Does Your State Change Your Book List?
Yes — more than any other single factor. Roughly 30 states have legal online sportsbooks, and the rest of the map is where exchanges and prediction markets have quietly become the whole story.
If you're in a competitive multi-book state (New Jersey, Colorado, Pennsylvania, Michigan, Ohio, Arizona and most other legal markets): open four or five mainstream books, add an exchange, add a prediction market. This is the full portfolio, and it's the best position to arb from.
If you're in Florida: the state's compact means Hard Rock Bet is effectively the only sportsbook. You can't arb one book against itself, so exchanges and prediction markets aren't a supplement for Florida bettors — they're the entire setup.
If you're in California, Texas or Georgia: there's no legal online sportsbook at all. Two years ago that meant no arbitrage. In 2026 it doesn't: the CFTC-regulated exchanges and prediction markets are available in most of these states, and arbing between two of them is a real strategy rather than a workaround.
If you're in a state with active restrictions on prediction markets — the legal picture there is genuinely unsettled, with federal appeals courts having split on the question during 2026 — check what's actually available to you before building around one platform.
Rather than guessing, AVO's sportsbook finder shows which supported books are live in your state, so you can build the account list before you start hunting for arbs.
How to Build Your Sportsbook Portfolio
Five steps. Do them in this order.
1. Open three to five mainstream books. Start with the largest ones available in your state. Every additional book adds more pairs of prices that can disagree, and the jump from two books to five is where arbitrage stops feeling theoretical.
2. Add a low-vig exchange. This is your anchor account — the one that doesn't get limited. Fund it properly, because over time it will be one side of a growing share of your bets.
3. Add a prediction market. Kalshi or Polymarket. Widest gaps, different crowd, and the only option in some states.
4. Split your bankroll so both legs can always fire. The most common beginner mistake is having the money in the wrong place when an arb appears.
| Where the money sits | Share of bankroll | Why |
|---|---|---|
| Mainstream books | ~50%, spread evenly across them | Most of your volume; you need a live balance at each one, not all of it at one |
| Low-vig exchange | ~30% | Your never-limited leg, used most often |
| Prediction market | ~20% | Fewer opportunities, but the widest margins when they appear |
5. Rotate as accounts get restricted. Limits are a cost of doing business, not a failure. When a book cuts you to small stakes, open the next one on your list and move the balance. AVO's $Mover tool finds low-hold bets that shift funds between books without giving up much in the process.
A limited account isn't a dead account. Restricted books often still accept full-size bets on main lines, still hand out promos, and still work fine as the smaller leg of an arb. Keep them.
Can Sportsbooks Ban You for Arbitrage Betting?
They can restrict you, and the major ones do. Arbitrage isn't illegal and it isn't fraud — you're taking prices that books are publicly offering — but it isn't profitable for the sportsbook, and their terms give them wide latitude to limit stakes or close accounts.
What's new is that we now have books saying so in their own words. Since June 2026, Massachusetts has required licensed sportsbooks to tell a bettor within 48 hours why they've been limited. In those disclosures, Fanatics cited activity signalling "potential arbitrage positions" and DraftKings cited behavior "indicative of targeting perceived market inefficiency" — as reported by Legal Sports Report. Until that rule, this was all inference.
The practical implication isn't to hide. It's to build the portfolio described above, so that no single account being restricted changes what you can do tomorrow. For the fuller legal picture, see is arbitrage betting legal.
How AVO Finds the Arbs Across Your Books
Having the right accounts is half of it. The other half is spotting a disagreement between them and placing both legs before it closes — which, on a live market, is a window measured in seconds.
AVO aggregates odds from 70+ sportsbooks, exchanges and prediction markets into one live odds screen, flags arbitrage opportunities the moment prices diverge, and loads both legs into a central arbitrage calculator that sizes each stake for you. AVO Tabs then opens both sportsbooks in their own windows with your logins already live, so placing the second leg doesn't cost you the twenty seconds that kills the opportunity.
It was built by former arbitrage bettors, which is why it's designed around the part that's actually hard: not finding one good price, but acting on two at once.
Try AVO Pro for 3 days for $1 →
Frequently Asked Questions
What is the best sportsbook for arbitrage betting? There isn't one. Arbs exist between books, so the useful question is which set of accounts to hold. A workable answer for most bettors is three to five mainstream sportsbooks, one low-vig exchange, and one prediction market.
What sportsbooks can I use for arbitrage betting? Any book you can legally open in your state, plus the CFTC-regulated exchanges and prediction markets that are now available in most of the country. AVO's sportsbook finder shows what's live where you are.
How many sportsbooks do I need to arb? Two is the technical minimum and it will feel frustrating. Most bettors find the experience changes at four or five accounts, when there are enough pairs of prices for opportunities to appear regularly rather than occasionally.
Will sportsbooks ban you for arbitrage betting? Major books restrict consistent winners, usually by cutting maximum stakes rather than closing the account outright. Books have now stated arbitrage as a limiting reason in regulator-mandated disclosures. Exchanges and prediction markets don't limit winners the same way, which is the main argument for having one.
Which sportsbook limits arbitrage bettors the fastest? No book publishes this, and the timelines you'll find online are estimates that conflict with each other. Community consensus points to BetMGM and bet365 as quicker to restrict and BetRivers as slower, but treat all of it as directional.
Is arbitrage betting worth it with only mainstream books? It works, but you'll leave a lot on the table. The wide gaps in 2026 tend to be between structurally different venues — a sportsbook against a prediction market — rather than between two apps that watch each other's lines all day.
AVO is an entertainment tool for adults and an analytics platform — not a sportsbook. AVO does not accept wagers and does not hold funds. You must be of legal age to bet in your jurisdiction (21+ in most states). Sportsbook availability, exchange fees and prediction-market regulations change frequently; confirm current terms with each platform. Please bet responsibly.
