RTP vs House Edge: Two Sides of the Same Coin
Return to Player (RTP) and house edge are two ways of expressing the same mathematical concept. RTP tells you what percentage comes back to players; house edge tells you what percentage the casino keeps. They always sum to 100%. Understanding both metrics—and when to use each—gives you a complete picture of any game's mathematical cost.
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The Simple Relationship: RTP + House Edge = 100%
The relationship is straightforward: RTP and house edge are complements. A slot with 96% RTP has a 4% house edge. European roulette with a 2.7% house edge has a 97.3% RTP. Blackjack with basic strategy at 0.5% house edge has a 99.5% RTP. To convert one to the other, simply subtract from 100%. Both numbers describe the same mathematical reality, just from different perspectives—the player's return (RTP) or the casino's take (house edge).
RTP = 100% - House Edge | House Edge = 100% - RTP- •Always sum to exactly 100%
- •RTP: player's perspective (what comes back)
- •House edge: casino's perspective (what stays)
- •Convert by subtracting from 100%
- •Same math, different framing
When to Use RTP vs House Edge
The gambling industry uses both terms, but in different contexts. Slot machines almost always publish RTP—players see '96% RTP' on the game info screen. Table games traditionally use house edge—you will hear '0.5% house edge for blackjack.' Both are useful. RTP is intuitive when thinking about returns: 'I expect to get back $96 of every $100 I wager.' House edge is clearer for cost: 'I expect to lose $4 per $100 wagered.' Use whichever framing helps you understand the game's cost.
- •Slots: typically marketed as RTP
- •Table games: typically discussed as house edge
- •RTP: intuitive for thinking about returns
- •House edge: clearer for understanding cost
- •Both convey identical information
Common RTP and House Edge Values
Blackjack (basic strategy): 99.5% RTP / 0.5% house edge. European Roulette: 97.3% RTP / 2.7% house edge. Baccarat Banker: 98.94% RTP / 1.06% house edge. Online Slots (typical): 96% RTP / 4% house edge. Land-based Slots (typical): 90% RTP / 10% house edge. Keno: 71-75% RTP / 25-29% house edge. These values show the enormous range: from 99.5% return on blackjack to 71% return on Keno. The difference in cost per $100 wagered ranges from $0.50 to $29.
- •Blackjack: 99.5% RTP / 0.5% edge
- •European Roulette: 97.3% RTP / 2.7% edge
- •Online Slots: ~96% RTP / ~4% edge
- •Land-based Slots: ~90% RTP / ~10% edge
- •Keno: ~72% RTP / ~28% edge
Practical Impact on Your Bankroll
A 1% difference in house edge may sound small, but it compounds with every bet. Over $10,000 in total wagers (achievable in a few casino visits), a 1% edge difference equals $100. Over $100,000 in lifetime wagers, it is $1,000. Choose a 96% RTP slot over a 91% RTP slot and you save $5 per $100 wagered—$50 per $1,000. This is why educated players consistently choose higher-RTP games. The edge does not guarantee that you will lose more per session (variance dominates), but it guarantees you will lose more over time.
- •1% edge difference = $100 per $10,000 wagered
- •96% vs 91% RTP = $50 savings per $1,000 wagered
- •Compounds over a lifetime of play
- •Variance masks the effect in single sessions
- •Long-term cost is mathematically certain
Key Takeaways
- 1RTP + House Edge always equals 100%—they are complementary metrics
- 2Slots use RTP; table games use house edge—same math, different framing
- 3Convert between them by subtracting from 100%
- 4Even small differences compound significantly over time
- 5Always check the RTP or house edge before playing any game