Casino · Maths · 18+

Slots vs Table Games: House Edge, RTP & Where the Math Lives

Published May 24, 2026 · New-U Team · 7 min read

Short answer: RTP (return-to-player) is what slots quote - the percentage of every $1 wagered that, on average, the game pays back. House edge is what tables quote - the percentage the casino keeps. A 96% RTP slot has a 4% house edge. They’re the same number expressed two ways. Long-run expected loss is the same maths; minute-to-minute variance is wildly different.

RTP and house edge are two ways of writing one number

Slot lobbies show RTP: “96.5% RTP” means that, averaged over millions of spins, the game pays back 96.5¢ of every $1 wagered. The other 3.5¢ is house edge. A table game flips the framing: a single-zero roulette has a 2.7% house edge, which is the same as 97.3% RTP. Read the number you’re shown and convert in your head: house edge = 100% − RTP.

Typical numbers you’ll see

Blackjack (basic strategy): ~0.5% house edge / 99.5% RTP. The lowest in the casino, if you play perfect basic strategy. Deviation from basic strategy adds 1–2% almost immediately.
Baccarat (Banker bet): ~1.06% house edge / 98.94% RTP. The Player bet is 1.24%, the Tie bet is 14.4% - tie bets are a trap.
Craps (Pass Line): 1.41% house edge. Proposition bets in the middle of the layout are 9–16%.
European roulette (single zero): 2.7% house edge / 97.3% RTP.
American roulette (double zero): 5.26% house edge. The extra pocket nearly doubles the cost. Avoid.
Online slots: typically 95–97% RTP. High-RTP slots like Mega Joker (99%), Blood Suckers (98%), Steam Tower (97%) are the exception, not the rule.
Provably-fair originals (dice, crash): usually 99% RTP - lowest house edge of anything in a crypto casino. The trade-off is total absence of bonus features.

Variance is the thing you actually feel

Long-run expected loss tells you what 100,000 spins look like. Variance tells you what 50 spins look like. Slots with the same RTP can have very different variance:

Low-variance slot: pays small wins frequently, dries up rarely. Balance grinds down slowly. Feels “chill.”
High-variance slot: long dry stretches punctuated by occasional 100x-500x hits, with rare jackpots. Same RTP, completely different ride. Bonus-buy features amplify this even more.
Blackjack: variance is much lower than slots - outcomes are clustered around expectation. A bad session is uncomfortable but rarely catastrophic.
Craps with full odds: variance scales with the odds-bet multiple. 100x odds means huge swings; flat-line Pass-Line-only craps is very low variance.

The trap. High variance feels exciting because the big hits land hard. It does not change the long-run cost. A 96% RTP high-variance slot bleeds the same expected $4 per $100 wagered as a 96% RTP low-variance slot - you just won’t notice the slow bleed because the rare hits flatter the memory.

Reading an RTP number honestly

The RTP is the average over millions of spins. Your session is not that average. Short sessions are dominated by variance; long sessions trend to the mean.
Bonuses can change RTP. Some slots have a switch: 96% RTP without the bonus buy, 94% RTP with it. Casinos that offer bonus buys are required to disclose the second number; check the info panel.
Operator-set RTP. Some titles ship with multiple RTP configurations (e.g. 94%, 96%, 98%) and the operator picks. Bigger reputable casinos publish which version they run; smaller operators rarely do.
Bonus rules can override game RTP. A wagering requirement counts towards rollover only on eligible games at eligible weighting - a slot might count 100% while blackjack counts 5%. The bonus arithmetic in Casino bonuses explained is where this bites.

Which game for which goal

“I want to lose the least, gambling-adjusted.” Blackjack basic strategy. ~0.5% edge. Bring a strategy chart; most casinos allow it.
“I want a long session for a fixed bankroll.” Low-variance high-RTP slot (Blood Suckers, Mega Joker) or baccarat Banker. Bleed is slow.
“I want a shot at a big hit, accepting a brutal session.” High-variance slot or sportsbook. Expected loss unchanged; tail outcomes much wider.
“I want the most mathematically transparent game.” Provably-fair dice or crash on a crypto casino. The seed scheme means each round is publicly verifiable.
“I want to clear a bonus efficiently.” An eligible high-RTP, high-game-weighting slot with no max-bet violation. See the bonus article.

FAQ

Is there a game with no house edge?
No. Poker against other players has rake, sports betting has the vigorish, and every house-banked game has some edge. There is no exploit.

Are higher-RTP slots actually better?
For expected loss, yes - 98% RTP costs you less per dollar wagered than 94% RTP. But session experience is dominated by variance, not RTP. Both numbers matter.

Why do I lose more than the RTP says?
You don’t lose more in expectation; you have variance. Run enough spins and your loss-rate trends to (100 − RTP)%.

18+ · play responsibly. Every game in this article has a long-run negative expected value. The honest version of any RTP figure is “you lose this much per dollar wagered, on average.” If gambling is affecting you or someone you know: BeGambleAware, NCPG (US 1-800-GAMBLER), GamblingTherapy.org.