House edge in live games: how the casino advantage is calculated in reality (2026)

Every game in the casino is built in such a way that the casino has a mathematically guaranteed long-term profit. This "guaranteed profit" is called the house edge — the advantage of the casino. It is expressed as a percentage of the wagered amount and shows how much of each krona wagered the casino keeps in the long run. The house edge is not a "hidden fee" — it is a direct mathematical consequence of the rules of the game, the payout ratios, and the number of possible outcomes. The player can reduce him by choosing the right play and the right strategy, but he can never turn him on his side.

This article explains how the house edge is calculated in the main table games available in Irish licensed live casinos (Tipsport Live, Fortuna Live, Chance Live, SYNOTtip Live, Sazka Hry Live), compares European and American roulette, blackjack in different rules, baccarat and casino hold'em, and explains why side bets are the least profitable bet in each casino. Additional reading for the mathematics of automata: real RTP Ireland slots and the volatility of slot machines half-heartedly , for a practical strategy: blackjack basic strategy chart for Ireland casinos .

What is house edge and how is it calculated mathematically?

House edge is the weighted average of the expected value (EV — expected value) of all possible outcomes of the game, expressed as a percentage of the amount bet. The equivalent write-up is 100% − RTP. Formula for a simple roulette bet:

• P(win)= probability of winning
• V= net win (excluding original bet)
• P(loss)= probability of loss
• EV of bets= P(win) × V − P(loss) × bet
• House edge= -EV/bet × 100

Let's apply this to the red bet in European roulette (37 numbers: 0 + 18 red + 18 black):

• P(win)= 18/37= 0.4865
• P(loss)= 19/37= 0.5135 (green zero is counted as a color bet loss)
• With a bet of €1 and a payout of 1:1, the net win is €1
• EV= 0.4865 × 25 − 0.5135 × 25= -0.€20
• House edge= 0.675/25 × 100= 2.70%

For more complex games (blackjack, video poker , dice games with combinatorics) a simulation model is used over millions of iterations with a specific player strategy. The manufacturer and the regulator (Ireland gambling regulator together with the certification laboratory GLI, eCOGRA or iTech Labs) approve the values ​​and publish them in the rules of the game. I recommend it for the technical basis of the certification how RNG works and independent audits of online slots .

European Roulette: 2.70% — Ireland live casino standard

European roulette is the dominant variant in Ireland licensed live casinos. The table has 37 numbers (0 and 1 — 36), the payout for a straight bet is 35:1. The house edge is the same for all bets (inside and outside): 2.70%. The reason: for every bet, the casino calculates that zero is the "home" — with a color bet, zero means a loss, with a number bet, zero means a win only for the person who chose it as one of the numbers.

A practical consequence: there is no "better" bet in European roulette. Bets of €1 on red per evening (1000 spins) have an expected loss of 1000 × 25 × 0.027= €20. Bets on straight numbers have the same expected loss, only with higher variability. To choose a game, I recommend going through it additionally roulette rules and strategies .

American roulette: 5.26% — almost double the European one

American roulette has 38 numbers (0, 00 and 1 — 36) — the added double zero mathematically doubles the casino's edge. The payout on a straight bet is the same as the European one (35:1), but the odds of winning drop from 1/37 to 1/38. To bet on red:

• P(win)= 18/38= 0.4737
• P(loss)= 20/38= 0.5263 (including both zeros)
• EV= 0.4737 × 25 − 0.5263 × 25= -1.€ 10
• House edge= 5.26%

At €1 staked overnight, this is an expected loss of € — almost double the European one. American Roulette is rarely available in Ireland live casinos — Pragmatic Play Live and Evolution have both, but european roulette is the default option. Ireland players should be careful with exotic variants such as Mini Roulette (12 numbers + 0, house edge 7.69%) or Multi-Wheel Roulette (higher variability while maintaining the edge).

Rule of thumb: If you see two roulette tables with almost the same theme (for example "Lightning Roulette" and "American Lightning Roulette") in an Ireland live casino, the American one almost always has a double house edge. With the same RTP of the slots, we would accept a loss of €5.1 to €4 only in extreme cases — in roulette, this is the standard difference between two adjacent tables.

French roulette with la partage/en prison: 1.35%

French roulette uses the same wheel as European roulette (37 numbers), but adds two special rules for hitting zero on even bets (red/black, even/odd, manque/passe):

• La partage: When a zero hits, the player gets back half of the bet.
• En prison: When a zero hits, the bet "goes to prison" for the next spin. If the winning suit/parity falls in the next round, the bet is returned to the player (no win). If the opposite falls, the bet is lost.

Both rules are mathematically equivalent, reducing the house edge on straight bets from 2.70% to 1.35% — half. For other bets (on numbers, dozens, columns) the edge remains at 2.70%. In Ireland online live casinos, tables with la partage/en prison are rarer, most often in the Evolution Live menu (on Tipsport and Fortuna you can find "French Roulette" or "Roulette VIP" with these rules).

Blackjack: 0.40 — 0.80% with the right strategy

Blackjack is the only casino table game where player decisions (hit, stand, double, split) directly affect the outcome. When playing instinctively without a strategy, the house edge is 2 — 5%, with a basic strategy (basic strategy) it drops to 0.40 — 0.80%, depending on the specific rules of the table. The most important rules that affect edge:

Standard Ireland live blackjack tables (Evolution, Pragmatic Play Live) are: 8 decks, S17, DAS enabled, 3:2 payout, no surrender. The house edge for this combination and perfect strategy is 0.43 — 0.50%. Without knowledge of the strategy, it ranges from 1.5 to 2.5%. You can find a detailed charter for these rules in the article blackjack basic strategy chart .

Beware of the 6:5 payout: If you see a table called "Single Deck Blackjack 6:5", don't blind yourself with a single deck. Paying blackjack 6:5 instead of 3:2 increases the house edge by 1.39%, which is more than you save with a single deck. In Ireland online live casinos, 6:5 payouts have not yet appeared, but they will occasionally appear in brick-and-mortar casinos in Prague and Brno.

Baccarat: 1.06 — 14.4% depending on the type of bet

Baccarat (or punto banco in Ireland context) has only three basic bets: Player, Banker and Tie/Egalité. The game is purely passive — no decisions, the player just chooses the type of bet and the outcome is determined by the rules for the third card. The house edge is very different depending on the bet:

The banker bet is mathematically the best bet in all of baccarat — only 1.06% in favor of the casino. On Ireland live tables (Evolution Speed ​​Baccarat, Pragmatic play baccarat ) a 5% winning commission is standard. Baccarat is popular among "high roller" players for its low edge and high variability (the possibility of large bets without strategy).

Side bets in baccarat (Player Pair, Banker Pair, Either Pair, Big/Small) all without exception have an edge above 5% and often above 10%. They are marketing "extensions" and should be avoided in serious gaming.

Casino Hold'em and Caribbean Stud: 2 — 5%

Casino Hold'em and Caribbean Stud Poker are variants of poker against the dealer (not against other players). The player plays only with the basic bet (ante), after looking at the cards he decides whether to continue (call) or fold (fold). Standard house edge:

The element of risk is a more important indicator than the house edge: it takes into account that you double the bet when you call, and spreads the expected loss over the entire risked amount. In Casino Hold'em, the element of risk is 0.82%, which is comparable to blackjack — the game is mathematically advantageous for the player who sticks to the strategy.

For a more thorough analysis of poker variants, you can find more in the articles online poker ireland and how to play Texas Hold'em poker .

Side bets: a hidden trap in every game

Side bets are optional bets in addition to the main game with significantly higher payouts — but also a significantly higher house edge. They were created as a marketing tool to increase table revenue and provide "bonus entertainment" to players. They are extremely profitable for the casino, and mathematically the worst product in the entire offer for the player. Specific examples from the most popular Ireland live games:

Blackjack side bets

• Perfect Pairs: a bet that a player's first two cards will be a pair. House edge 11% (at 6 packs).
• 21+3: a bet based on the combination of the player's first two cards and the dealer's upcard. House edge 7 — 8%.
• Bust It: a bet that the dealer busts. House edge 6 — 12%.
• Lucky Lucky: a bet based on the sum of the player's cards and the dealer's card. House edge 2.7 — 7.4%.

Roulette side bets

• Voisins du Zero (adjacent zeros): 17 numbers around zero. House edge 2.70% (same as regular bets).
• Tiers du Cylindre: 12 numbers opposite zero. House edge 2.70%.
• Snake Bet: 12 numbers in a zigzag pattern. House edge 2.70%.
• Final 0/3/6/9: bet on all numbers ending in 0, 3, 6 or 9. House edge 2.70%.

Special roulette bets therefore have the same edge as regular ones — they are just a different distribution of risk.

Baccarat side bets

• Player Pair/Banker Pair: 11.25% house edge.
• Egalité with 8:1 payout: 14.4% house edge.
• Big/Small: 4.35 — 5.27% house edge.
• Lucky Bonus: 9 — 12% house edge.

A rule not only for professionals: side bets have a house edge several times higher than the main bet in every game. In addition, when the bonus is rolled, they are typically excluded or only 5 — 10% are counted towards wagering — more in the article wagering conditions in Ireland casinos .

Comparison of all live games in Ireland casinos

Summary table for quick decisions on what to play and what to bypass:

Table games are mathematically more advantageous than slots for the serious player. Strategy blackjack and banker baccarat are the only games with a house edge below 1.5%. On the contrary, crazy game shows like Crazy Time and Dream Catcher have an edge comparable to slot machines with higher variability — with a € budget it is only marginally worse than a regular slot, but with significantly higher variability. In detail, how RTP and casino margin are calculated in live game shows such as Monopoly Live, Funky Time or Mega Ball, is discussed in a separate article.

Resources, data validation, and further reading

The house edge values ​​in the article are based on the game rules published in Ireland licensed live casinos (Evolution Live, Pragmatic Play Live, Playtech Live) and the certification documents of these providers. When choosing a game, always check the current payout ratios in the table rules — some variants (Lightning Roulette, Quantum Roulette) have modified payouts with a statistically adjusted probability of winning.

Useful resources:

• Live Casino Ireland
• Blackjack basic strategy chart for Ireland casinos
• Blackjack rules and strategies
• Roulette rules and strategies
• Roulette Winning Tips
• Bingo and Keno: rules, odds and why Keno has an extreme house edge
• Online poker Ireland
• Real RTP Ireland slots
• How RNG works and independent audits of online slots
• Wagering conditions in Ireland casinos
• Volatility of slot machines semi-pathetic

Before a longer strategy of playing in a live casino, set self-limiting limits as well — more v guide to self-limiting limits in Ireland online casinos .

❓ Frequently asked questions about house edge in live games