Guide · 8 min read
Matched betting explained: the method, the maths and honest expectations
Matched betting turns bookmaker promotions into a mostly predictable result by covering every bonus bet with an opposite bet. It comes from the UK, where it relies on betting exchanges. This guide explains the principle, why the exchange route doesn't work in Austria or Slovakia, how the back/back version works instead, and what it can and cannot do for you.
Updated 22 October 2026
Contents
- The principle: bonus plus cover bet
- Classic back/lay versus back/back
- Why Austria and Slovakia have no exchange route
- How a welcome offer is worked, step by step
- What it brings, and when it ends
- Legality, bonus terms and tax in short
- Matched betting with ArbVantage
- Frequently asked questions
- Sources
The principle: bonus plus cover bet
Bookmakers give new and existing customers promotions: free bets, deposit bonuses, odds boosts, money back if a bet loses. A promotion has value, but only if the bet it is attached to wins. Matched betting removes that condition. For every bet that uses or unlocks a promotion, you place an opposite bet that covers the other outcomes. Whatever the result, one side pays, and what you keep is roughly the value of the promotion minus a small cost for the price difference between the two sides.
Two kinds of bet make up the method:
- Qualifying bet. A bet with your own money that unlocks the promotion, for example "bet €20, get a €20 free bet". Covered properly, it costs a little, typically a few percent of the stake.
- Free bet conversion. The free bet itself, covered so that you keep part of its value whatever happens. The free bets guide explains this in detail.
Matched betting is not the same as sure betting. A sure bet finds two bookmakers whose prices together cover all outcomes for a small margin, without any promotion. Matched betting starts from the promotion and usually accepts a small loss on the price difference. In practice the two overlap: the best cover for a free bet is often a pair of prices that is close to a sure bet.
Classic back/lay versus back/back
In the UK version, you back an outcome at the bookmaker and lay the same outcome at a betting exchange, which means betting that it won't happen. One lay bet covers every other outcome, however many there are, and exchange prices are close to fair. The exchange charges a commission on net winnings, often around 2 to 5%. How lay bets and their liability work is in back and lay bets.
The back/back version covers the bonus bet with ordinary bets at other bookmakers instead: one cover bet for a two-way market, two for a three-way market such as 1X2. It needs no exchange, but bookmaker prices carry a margin, so it usually keeps a little less of each promotion, and three-way markets need three accounts at once.
Back/lay: lay at 4.20 with 5% commission. Lay stake = 20 × 3 / (4.20 − 0.05) = €14.46, liability €14.46 × 3.20 = €46.27. If the free bet wins: €60.00 − €46.27 = +€13.73; if it loses, the lay wins €14.46 minus 5% = +€13.74.
Back/back: cover the other side at 1.30 at a second bookmaker. Cover stake = €60.00 / 1.30 = €46.15. Either way about +€13.85.
In this example the two routes keep about the same, about 69% of the free bet, if all bets are accepted at these prices and stand. With worse cover prices back/back keeps less; with good ones it can keep more.
Why Austria and Slovakia have no exchange route
For residents of our two core markets the classic method isn't available in practice:
- Austria. According to its own country-closure FAQ, Betfair Exchange is not available to customers in Austria, and Matchbook restricts Austria. We are not aware of any exchange that currently accepts Austrian residents (as of October 2026).
- Slovakia. Only operators licensed by the Slovak gambling regulator ÚRHH may offer online betting, and none of them runs an exchange. The major exchanges are on the ÚRHH list of prohibited offers.
- Germany. Exchange betting is heavily restricted under the 2021 interstate treaty; bet only with operators on the GGL whitelist.
We don't recommend operators that exclude your country, or ways around such restrictions. The betting exchange guide covers access in more detail. That leaves back/back as the realistic method for Austrian and Slovak bettors, which is how the rest of this guide is written.
How a welcome offer is worked, step by step
- Read the promotion's terms. Qualifying stake, minimum odds, which markets count, whether the free bet is stake not returned, its expiry, and any wagering on the winnings. See bonus wagering requirements.
- Find a close pair of prices for the qualifying bet: the bonus bookmaker's price at or above the minimum odds, and a cover price at another bookmaker as close to it as possible.
- Place the qualifying bet, then the cover. Recalculate the cover with the price you actually got.
- Wait for the free bet to be credited, which often happens only after the qualifying bet settles.
- Convert the free bet with a cover bet at another bookmaker, ideally at higher odds on the free bet side. The free bet calculator works out the stakes.
Qualifying bet: €20 at 2.00 at the bonus bookmaker, covered at 1.95 elsewhere with €40.00 / 1.95 = €20.51. Either result: about −€0.51.
Free bet: €20, stake not returned, at 4.00, covered at 1.30 with €46.15. Either result: about +€13.85.
In this example the offer leaves about +€13.34 in total, if every bet is accepted at these prices and stands, and the bookmaker applies its terms as written. Real offers, prices and terms differ, and the result can be lower or negative.
What it brings, and when it ends
Matched betting is limited by the supply of promotions, not by your bankroll. Be realistic about three things:
- Welcome offers are one-off. Each bookmaker gives one per person and household. Austrian advantage bettors commonly use around ten to fifteen bookmakers, and Slovakia's licensed market has fewer, around seven online sports bookmakers, and not all of them run sports welcome offers that suit the method. Once those are used, the easy part is over.
- Reload offers are smaller and rarer. Existing-customer promotions exist, but they are less generous than in the UK, and accounts that only take promotions often stop receiving them. See how bookmaker limits work.
- Things go wrong. A price moves between the two bets, a bet is voided, or a term is missed. A single mistake can cost more than a promotion was worth.
For these reasons we describe matched betting as a way to get the most out of promotions you would be offered anyway, not as an income. Sure betting is the method that continues after the welcome offers are used; the two can share the same accounts and the same calculator.
Legality, bonus terms and tax in short
Legality. Matched betting means placing ordinary bets at licensed bookmakers. There is no law in Austria or Slovakia against covering a bet elsewhere. What a bookmaker can do is apply its own terms: withdraw a bonus, void bonus winnings or restrict an account if it believes the bonus terms were broken.
What crosses the line. Bonus terms almost always forbid multiple accounts, accounts in someone else's name, and coordinated betting by several people on one promotion. Those are breaches of contract and can be fraud. Matched betting as described here uses one account per bookmaker, in your own name, with your own money. Never bet through other people's accounts.
Tax. In Austria, winnings from private betting are generally not subject to income tax; the 5% betting fee (Wettgebühr) is owed by the bookmaker, but some bookmakers pass it on, which changes the maths. In Slovakia, winnings from licensed gambling are generally exempt from personal income tax for players. Large-scale, business-like betting can be judged differently, so ask a tax adviser if in doubt. More in tax and legality.
Matched betting with ArbVantage
ArbVantage is built for sure bets and middles, and it supports the free-bet side of matched betting: a free-bet calculator for one or two cover bets, a ranking of current price pairs for converting a free bet at a given bookmaker, and bonus wagering tracking on each bookmaker card. We don't list or recommend bonus offers or codes, and we don't know your bookmaker's terms; you enter them and decide every bet.
Frequently asked questions
Is matched betting legal?
Placing bets at licensed bookmakers and covering them elsewhere is legal in Austria and Slovakia. Bookmakers can still apply their bonus terms, for example withdraw a bonus or restrict an account. Multiple accounts or accounts in other people's names breach those terms and can be fraud.
Does matched betting work without a betting exchange?
Yes, with back/back cover bets at other bookmakers: one cover bet for a two-way market, two for 1X2. It usually keeps a little less of each promotion than an exchange would, but it works with ordinary bookmaker accounts.
How many bonuses are there in Austria and Slovakia?
Each bookmaker gives one welcome offer per person. Austrian advantage bettors commonly use around ten to fifteen bookmakers; Slovakia's licensed online market has around seven sports bookmakers. Not every offer suits the method, and reload offers are smaller and rarer.
Is matched betting bonus abuse?
Using a promotion as offered, from one account in your own name, is not abuse in a legal sense, though some bookmakers' terms let them restrict customers who only take promotions. Multiple accounts, other people's accounts and coordinated betting are what bonus terms forbid.
Sources
- Wikipedia: Matched betting
- Betfair: country closure FAQs
- ÚRHH (Slovak Gambling Regulatory Authority): list of prohibited offers (in Slovak)
- ÚRHH: licensed gambling websites in Slovakia (in Slovak)
- RIS: Gebührengesetz 1957, § 33 TP 17 (Austrian betting fee) (in German)
- Slov-Lex: Act No. 30/2019 Coll. on gambling (in Slovak)
As of October 2026. Bookmakers' rules, odds and offers change; their current terms and betting rules always apply.
Promotions are a bookmaker's offer, not an entitlement, and a single void can cost more than a promotion was worth. Only use money you can do without. Our responsible gambling page lists free help in Austria and Germany.
Information, not betting, legal or tax advice. 18+.