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RTP and house edge: the price of play as a percentage

RTP is the number nearly every beginner misreads: it looks like a promise of winnings, but it is really a price tag. We start from a common question, take the 96.1% of a real game apart into two pieces, and at the end you work out for yourself what 1,000 spins cost.

If a machine pays back 96%, will I still have 96 of my 100 euros tonight?

Short answer: no, and that is not what the number is for. RTP (return to player) shows what share of all the money staked on a game goes back to players in theory – once you average out an enormous run of rounds. For a single evening it is not a promise, only a direction.

Also, the 96% does not apply to your deposit but to every single stake you put through the game. If you sit down with 100 euros and keep re-staking your winnings, your turnover can easily become several times those 100 euros. The house’s share is built up from that turnover.

This difference is the key to the lesson.

Two names for the same money: RTP and house edge

The two terms mirror each other. Whatever does not return to the player is the house’s advantage: house edge = 100% − RTP. For a game at 96.10%, the house’s share is 3.90%, which means an average of 3.90 euros out of every 100 euros staked.

The rows below are based on figures published by the studios; the roulette row is general maths:

Game Published RTP House edge Average cost per 100 euros of turnover
Trillionaire Megaways (Red Tiger) 96.68% 3.32% 3.32 euros
Double Stacks (NetEnt) 96.10% 3.90% 3.90 euros
777 Strike (Red Tiger) 95.80% 4.20% 4.20 euros
European roulette 97.30% 2.70% 2.70 euros

The gaps look small, but they add up. On the same turnover, a 4.20% house edge costs more than one and a half times as much as a 2.70% one. So the house edge is not a penalty but the price of the entertainment: what you pay on average over enough play.

Where does the 96.1% come from? The two buckets of Double Stacks

For Double Stacks, NetEnt also publishes how that number is split: the base game contributes 67.3% and the free spins bonus 28.8%, for 96.1% together. The split says more than the total.

Part Contribution to RTP How you feel it while playing
Base game (regular spins) 67.3% Most of your rounds happen here; from 100 euros staked, an average of 67.30 euros comes back.
Free spins bonus (with stacked wilds) 28.8% It arrives less often, yet almost a third of the total return is hidden here.
Total 96.1% You only get close to it if the bonus turns up at its usual frequency.

What follows from this? If not a single free spins round starts during a short session, your balance tends to track the 67% base game, not the 96%. A well-timed bonus, on the other hand, can give you a better evening than expected – both outcomes are built into the number.

Not every studio publishes such a split, but wherever there is a bonus round, spins without it always return less than the full figure.

How long is the ‘long run’ the help screen talks about?

The studio calculates RTP from the game’s mathematical model and typically verifies it with simulated rounds numbering in the millions. A single player only spins a fraction of that. That is why one person can run above the published value for a whole week while another runs below it.

The law of large numbers does not say the machine will ‘win back’ a shortfall. It says that as the number of rounds grows, the average moves closer and closer to the theoretical value: an earlier deviation is not erased, only diluted. This thinking trap is covered in detail in the lesson on the gambler’s fallacy.

Put plainly: RTP is a property of the game, not of your evening.

Percentage myths, and how to test them at home

What many people believe What is actually true How to check it
On a 96% machine, 96 of your 100 euros are sure to remain. RTP is the theoretical average over the entire turnover; one session can swing either way. At the start and end of a demo session, note your play-money balance and compare it with the total amount you staked.
If a machine has not paid for a long time, its RTP is higher now. The setting is fixed and does not react to previous rounds. The percentage in the help section does not depend on past results – you will see the same figure there tomorrow.
A game tagged ‘High RTP’ is sure to pay better. The tag is a lobby marker; on Dukat.bet it also appears on games at around 95%. Open the game’s own help screen and read the exact value there.
Two machines at 96.10% behave the same way. The average can match while the swings and the bonus share differ hugely. See whether the studio publishes the base game versus bonus split, as it does for Double Stacks.

Why can the help screen show a different percentage than the studio’s website?

Studios offer many modern slots with several RTP settings, and the casino picks one. The title and the rules stay the same; only the maths differs. So the number you read on the developer’s website is not necessarily the one spinning in front of you.

Dukat.bet does not publish which version it uses for each game. The only reliable source is the game’s info panel: once the game is open, you usually find it behind the ‘i’ or menu icon, at the end of the rules or in a separate RTP line.

The remaining rows of the payout table are covered in the lesson on reading a paytable. The bottom line: a lobby tag is not RTP data, the help screen is.

1,000 spins at 0.50 euros: what does the machine charge, and where does the return come from?

Practice exercise with made-up numbers – not Dukat.bet data:

Péter picks an invented slot whose help screen states a 96% RTP and also gives the split: base game 68%, bonus 28%. He plans 1,000 spins at a 0.50-euro stake.

  1. What will his turnover be?
  2. What is the average cost of the 1,000 rounds?
  3. How much comes back on average from the base game, and how much from the bonus?
  4. What happens if the bonus never starts during the 1,000 rounds?

Solution.

  1. Turnover: 1,000 × 0.50 = 500 euros. Not his deposit – re-staked winnings count too.
  2. House edge: 100% − 96% = 4%. Average cost: 500 × 0.04 = 20 euros.
  3. Base game: 500 × 0.68 = 340 euros, bonus: 500 × 0.28 = 140 euros. Together that is 480 euros; the missing 20 euros is exactly the price.
  4. Without the bonus, only the base game share is working: an average of 340 euros comes back and the shortfall is 160 euros. That is far more than the ‘20 euros’ suggests.

If you run the same numbers with the published Double Stacks split (67.3% + 28.8%), the average cost is 19.50 euros, and without the bonus the shortfall is 163.50 euros. The lesson is the same: you only get the full RTP together with the bonuses.

What should you jot down about the percentage before the next machine?

  • The RTP you saw in the help screen, plus the date – not the lobby tag.
  • The house edge: 100 minus the RTP.
  • Your planned turnover (number of rounds × stake) and its average cost.
  • If the studio publishes it: the split between base game and bonus.
  • One sentence for yourself: RTP shows a price, not what happens tonight.

Next, read the lesson on volatility and hit rate: it explains why two machines sharing one RTP can feel nothing alike.

Frequently asked questions

Does the RTP change if I play with a bigger stake?
On most slots the percentage is the same at every stake level, because payouts grow in proportion to the stake. There are exceptions, so if the help screen lists a stake-dependent value, that is the one that applies.
Can a casino game have an RTP above 100%?
Not with a standard setting, since the house edge is what keeps the business running. If you ever see a figure above 100%, it is usually a typo or a value tied to a special rule – look it up in the help section and do not build on it.
What is the difference between the house edge and the casino’s actual revenue?
The house edge is a theoretical ratio measured against the amount staked. Actual revenue adds up from the real results of many players, and over any short period it can differ from the theoretical ratio.
Does RTP matter in a twenty-minute session?
Over such a short time, your result is shaped far more by chance and by how much the game swings. Even then, RTP tells you the average price – it just cannot predict the specific evening.
Why is the RTP of European roulette higher than that of most slots?
The single green pocket creates a 2.70% house edge, which equals a 97.30% return. That comes from the maths of the wheel, whereas on slots the studio sets the percentage.
Updated: 2026-10-11 Verified by the editorial team

RTP and house edge: the price of play as a percentage

What a 96% RTP means and why 100 euros does not leave you 96 by evening: the house edge formula, the Double Stacks RTP split and a practice set of 1,000 spins.

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