What Is the House Edge?
The house edge is the mathematical advantage that a gaming platform holds over players on any given game. It's expressed as a percentage and represents, on average, how much of each wager the platform expects to retain over a large number of plays. Understanding this concept is one of the most empowering things any online player can do.
For example, if a game has a house edge of 2%, the platform expects to keep, on average, $2 for every $100 wagered — over a very large sample of bets. Individual sessions can vary wildly, but over time, the math is reliable.
Why House Edge Matters for Your Strategy
Knowing the house edge of different games helps you make more informed decisions about where to spend your gaming time and money. It's not about avoiding all games with a house edge (that would rule out almost every casino-style game) — it's about making conscious choices with accurate expectations.
House Edge Across Common Game Types
House edge varies significantly by game type and, in some cases, by the specific rules variant being played:
| Game Type | Typical House Edge Range | Notes |
|---|---|---|
| Blackjack (basic strategy) | 0.5% – 1% | One of the lowest when played with correct strategy |
| Baccarat (banker bet) | ~1.06% | Simple game with competitive odds |
| Video Poker (optimal play) | 0.5% – 5% | Highly variable by variant; skill-dependent |
| Roulette (European) | ~2.7% | Single-zero wheel is better than double-zero |
| Roulette (American) | ~5.26% | Double-zero significantly increases house edge |
| Online Slots | 2% – 15%+ | Varies hugely; check the published RTP |
| Keno | 20% – 35% | Among the highest house edges available |
Return to Player (RTP): The Other Side of the Coin
Return to Player (RTP) is simply the inverse of the house edge — it represents the percentage of total wagered money a game is designed to pay back to players over time. A game with a 96% RTP has a 4% house edge. For online slots and video poker, RTP figures are typically published and can be found in the game's information section.
When comparing similar games, a higher RTP is almost always preferable. However, RTP is calculated over millions of spins — your individual session results will differ significantly.
The Skill Factor: Games Where You Can Improve Your Odds
In some games, your decisions directly influence the effective house edge you face:
- Blackjack: Using mathematically correct "basic strategy" reduces the house edge to its minimum. Playing without it can double or triple the platform's advantage over you.
- Video Poker: Each hand requires decisions about which cards to hold. Learning optimal strategy for your specific variant meaningfully improves your expected return.
- Poker (player vs. player): There is no house edge in the traditional sense — the platform takes a rake. Your results depend on your skill relative to opponents.
Variance vs. House Edge: Understanding the Difference
House edge tells you the long-run expectation. Variance (or volatility) describes how much results fluctuate around that expectation in the short term. A high-variance game might produce large wins and large losses, while a low-variance game delivers more consistent, smaller results. Both can have the same house edge.
Matching variance to your bankroll and playing style is just as important as choosing a game with a low house edge.
Key Takeaways
- Every game has a house edge — understanding it sets realistic expectations.
- Choose games with lower house edges where possible, especially for longer sessions.
- In skill-based games, learning correct strategy directly reduces the house's advantage.
- Check published RTP figures for slots before you play.
- Short-term variance means individual results can vary widely from the mathematical expectation.