Arbitrage betting in Slovakia: licensed bookmakers, margins and limits

In short

• A sure bet combines bets on every outcome of one market at different bookmakers, where the odds differ enough that the return is higher than the total stake whatever happens. The principle is explained in sure betting explained.
• In Slovakia you may only bet legally with bookmakers holding an individual licence from the gambling regulator ÚRHH. There are eight, and seven of them actually offer online fixed-odds betting.
• Slovak bookmakers generally build higher margins into their odds than the big international ones. Sure bets are therefore rarer and usually smaller.
• The upside: the bookmakers are supervised by ÚRHH, winnings are generally tax-exempt, and you have somewhere to turn in a dispute.
• To be upfront: the opportunities feed in ArbVantage does not include Slovak bookmakers' odds yet. They will come with a second odds source.

What is different in Slovakia

The Gambling Act (Act No. 30/2019 Coll. on gambling) only allows operators holding an individual licence from the Gambling Regulatory Authority (Úrad pre reguláciu hazardných hier, ÚRHH) to offer online fixed-odds betting to players in Slovakia. Websites without a licence are put on the list of prohibited offers; it includes several large international brands and both well-known betting exchanges.

That leads to three practical differences:

• A smaller choice. A sure bet needs two bookmakers that see the same match differently. With seven bookmakers there are 21 possible pairs; with thirty there would be 435.
• Higher margins. Slovak bookmakers build a larger commission into their odds, so the gap between them has to be larger before a sure bet appears.
• No exchange and no sharp bookmaker. There is no side where you can "sell" a bet (lay it), and no reference market the others follow. More in sharp vs soft bookmakers and betting exchanges.

Which bookmakers qualify

According to ÚRHH's list of legal websites (valid as of 1 January 2026), these companies hold a licence for online fixed-odds betting:

As of October 2026. Source: ÚRHH list of legal websites as of 1 January 2026, and the operators' website footers. Check the current status on urhh.sk before you open an account.

For sure bets, the interesting bookmakers are those that set their own prices rather than copying them from one supplier. If two bookmakers take their odds from the same source, a sure bet between them hardly ever appears. An overview of every licensed bookmaker is in Slovak bookmakers; how many accounts make sense and in which order to open them is in how many bookmaker accounts you need.

Higher margins: why there are fewer sure bets

A bookmaker's margin is how far the sum of the inverse odds on one market exceeds 1 (100%). In a match between two equal sides, the fair price is 2.00 each way. A low-margin bookmaker might offer 1.95 and 1.95: 1/1.95 + 1/1.95 = 1.0256, a margin of about 2.6%. A higher-margin bookmaker might offer 1.85 and 1.85: 1/1.85 + 1/1.85 = 1.0811, a margin of about 8.1%. How the margin is calculated is explained in bookmaker margin (overround).

A sure bet appears when the sum of the inverse best odds across different bookmakers drops below 1. The higher the margins, the further the bookmakers' views have to diverge:

• If bookmaker A offers 1.95 on the home side (a margin of around 2.6%), a sure bet appears when another bookmaker offers more than 1/(1 − 1/1.95) = 2.053 on the away side, so 2.06 or higher.
• If bookmaker A offers 1.90 on the home side and bookmaker B works with a margin of around 5%, B has to offer at least 2.12 on the away side. At its own margin it would then offer only about 1.72 on the home side. The two bookmakers would have to see the match genuinely differently.

That is why sure bets between Slovak bookmakers are rarer and their margin tends to be below 2% rather than above. When a small margin is still worth it is discussed in what is a good arbitrage percentage.

Worked example: a sure bet between two bookmakers

An illustration (invented odds, not an offer from a specific bookmaker): an ice hockey match, market "match winner including overtime and shoot-out", so two outcomes.

The maths: 1/2.05 + 1/2.00 = 0.4878 + 0.5000 = 0.9878. The theoretical margin is 1/0.9878 − 1 = 1.24%. The exact stakes would be €98.77 and €101.23; rounded to whole euros, the profit is €2.95 or €2.00 depending on the result, so at least 1.0% of the stakes. You can work out stakes with the arbitrage calculator.

Even this small profit only holds if both bets are accepted at the stated odds and both bookmakers settle the market the same way. A typical trap in Slovakia is ice hockey: one bookmaker offers "match winner" including overtime, another a three-way market for regular time only. Those are not opposite sides of the same market. Details in overtime betting rules.

Typical markets

In our experience, sure bets between Slovak bookmakers appear most often where each bookmaker sets its own prices and the market gets less attention:

• Ice hockey: the Slovak Tipos extraliga, the Czech extraliga and other European leagues. Watch the difference between regular-time markets and markets including overtime.
• Football: the Slovak Niké liga and lower divisions, where prices move more slowly and bookmakers react to news at different times.
• Tennis and basketball: two-way markets, which suit sure bets best because you only need two bets.
• Live betting: during a match prices change fast and bookmakers lag by different amounts. There are more opportunities, but also a greater risk that the price changes before you place the second bet. More in live arbitrage betting.

The main risks that also apply at licensed bookmakers (price changes, voided bets, mismatched markets) are summarised in arbitrage betting risks.

Limits at Slovak bookmakers

Slovak bookmakers can also, under their game plans (herné plány), lower the maximum stake per bet slip, exclude an account from promotions or otherwise restrict a player who wins regularly. That is not a breach of the law but part of the contract you accepted at sign-up.

Czech and Slovak player discussions suggest that bookmaker groups active in both countries tend to restrict by lowering the maximum stake rather than by closing the account. That information is unverified and varies from player to player. With so few bookmakers, though, every limit hurts: if two out of seven restrict you, you lose more than half of your pairs (21 drop to 10).

What to do when a limit arrives, and why you should never bet through other people's accounts, is explained in bookmaker limits and betting on someone else's account.

What ArbVantage shows today

We'll say it plainly: our current odds source does not include the Slovak ÚRHH-licensed bookmakers (Tipsport, Fortuna, Niké, DOXXbet, SYNOT TIP, Tipos and Chance are not in the feed yet). The opportunities feed therefore won't show a sure bet between two Slovak bookmakers today. We are preparing a second odds source that includes them; we are not promising a date yet.

What already works: in Settings you choose the bookmakers you hold accounts with, and every bookmaker without a Slovak licence carries the neutral flag "Not licensed in Slovakia". Nothing is hidden; the decision is yours. The stake calculator and bet tracking also work with odds you enter yourself. Value bets are marked "coming soon" for now. During the 14-day free trial you can check whether the app is useful to you in its current state. How ArbVantage differs from a tool focused on Slovak bookmakers is compared factually in ArbVantage vs surebets.sk.

Tax

Under § 9(2)(l) of the Income Tax Act (Act No. 595/2003 Coll.), winnings from ÚRHH-licensed bookmakers are generally exempt from income tax, sure bets included. Players in Slovakia also pay no tax on stakes; the operator pays a levy on its own revenue. Details in Slovakia betting tax. This is not tax advice.

Frequently asked questions

Is arbitrage betting legal in Slovakia?

Yes, if you bet with bookmakers licensed by ÚRHH. A sure bet is an ordinary bet at odds the bookmaker offered itself, and holding accounts with several bookmakers is legal. Bookmakers can, however, restrict accounts that win regularly under their game plans.

How many sure bets are there between Slovak bookmakers?

Far fewer than across dozens of international bookmakers. Eight operators hold an ÚRHH licence for online fixed-odds betting, so there are few bookmaker pairs, and higher margins raise the bar. The number varies with the fixture list, and live betting usually has the most opportunities.

Why are sure bets smaller in Slovakia?

Because Slovak bookmakers generally work with higher margins. For a sure bet to appear, their odds have to diverge by more than the sum of their margins, and when that happens the gap is usually small. The margin of a sure bet therefore tends to be below 2 percent.

Does ArbVantage show sure bets between Tipsport, Fortuna and Niké?

Not yet. Our current odds source does not include the Slovak ÚRHH-licensed bookmakers. They will be added with a second odds source that we are preparing. During the 14-day free trial you can check what the app offers you today.

Sources

• Legal websites (online fixed-odds betting), as of 1 January 2026 · Gambling Regulatory Authority (ÚRHH) (in Slovak)
• List of prohibited offers · ÚRHH (in Slovak)
• Act No. 30/2019 Coll. on Gambling · Slov-Lex (in Slovak)
• Act No. 595/2003 Coll. on Income Tax (§ 9(2)(l)) · Slov-Lex (in Slovak)

As of October 2026. Licence data from the ÚRHH list and the operators' own details, without guarantee. Information on limits comes from player discussions and is not verified. Examples are illustrations.

Betting involves risk, even with sure bets: prices move, bets get voided and accounts get limited. Only use money you can do without. Our responsible gambling page lists where to get help.

Not betting, legal or tax advice. 18+. As of October 2026.