Fireball Roulette RTP and House Edge: Why Straight Up Pays 97.00%, Not 97.30%
By LiveCasinoData editorial team · Updated 2026-08-28 · 14 min read
Fireball Roulette carries two RTP figures: 97.00% on Straight Up bets and 97.30% on every other bet, per Evolution's published rules. The gap funds the Fireball Bonus, a 149-pocket grid capped at 2,500x that our tracker cannot fully audit, since the feed only records the 1x-20x booster stamped on the winning number, not the grid result itself. Across 84,583 tracked rounds in the last 90 days, the bonus triggered in 11.39% of rounds against an 11.69% theoretical rate, and the wheel's number frequencies stayed within normal variance of a fair 37-pocket table.
Key takeaways
- Fireball Roulette has two theoretical RTPs: 97.00% on Straight Up bets (3.00% house edge) and 97.30% on every other bet (2.70% edge), per Evolution's rules.
- Straight Up's 25:1 base payout alone returns about 70.3%; the missing 26.7 points come from the Fireball Bonus grid, whose 30x-2,500x results our feed cannot capture.
- The winning number was a Bonus Number in 11.39% of 84,583 tracked rounds over 90 days, close to the 11.69% rate implied by the observed count of Bonus Numbers per round (average 4.33).
- Our multiplier data is the Fireball booster (1x-20x), not the bonus-game payout; the winning number itself carried a booster in only 1.46% of rounds, topping out at 20x.
- Wheel fairness held over 90 days: zero landed 2.63% of spins against a 2.70% theory, and every color and dozen stayed within a point of its expected share.
Live data: last 90 days of Fireball Roulette
Open the live tracker →37 possible results tracked. The five most and five least frequent in this window are shown; the full breakdown is on the live tracker.
| Result | Observed | Theoretical | Difference | Avg multiplier | Max |
|---|---|---|---|---|---|
| hot12 | 2.82% | 2.7% | +0.12 | 1x | 15x |
| 19 | 2.8% | 2.7% | +0.1 | 1.1x | 15x |
| 27 | 2.78% | 2.7% | +0.08 | 1x | 20x |
| 15 | 2.75% | 2.7% | +0.05 | 1x | 10x |
| 16 | 2.75% | 2.7% | +0.05 | 1x | 10x |
| cold17 | 2.57% | 2.7% | -0.13 | 1x | 10x |
| 3 | 2.62% | 2.7% | -0.08 | 1x | 10x |
| 24 | 2.63% | 2.7% | -0.07 | 1x | 10x |
| 0 | 2.63% | 2.7% | -0.07 | 1x | 7x |
Fireball Roulette carries two RTP figures, not one: 97.00% on Straight Up bets and 97.30% on every other bet, according to Evolution's published game rules. The split exists because Straight Up alone funds the Fireball Bonus, a grid feature capped at 2,500x. Our tracker has logged 219,491 rounds of Fireball Roulette since January 2026, and this page checks Evolution's numbers against the last 84,583 of them, including what our data can and cannot confirm about the bonus itself.
What is the RTP of Fireball Roulette?
Fireball Roulette pays 97.00% RTP on Straight Up bets and 97.30% RTP on everything else, per Evolution's official rules shown in the game client help. Both figures sit on top of standard single-zero roulette: a real wheel with pockets 0 through 36, live since April 2025.
RTP is the share of every unit wagered that a bet returns over a very long run. A 97.30% RTP means that for every 100 units staked on, say, red, the wheel returns 97.30 units on average and keeps 2.70. Straight Up returns slightly less, at 97.00 units per 100, because of how its payout is structured.
What makes Fireball Roulette different from ordinary roulette is not the wheel, which is unchanged, but a layer added before the ball is released: a virtual slot machine marks between 3 and 7 numbers on the layout as Bonus Numbers each round, and some of those get a Fireball booster of 2x to 20x. If the ball then lands on a Bonus Number you covered with a Straight Up bet, a separate bonus game decides the payout. That mechanic is why Straight Up's RTP differs from every other bet, and it is the subject of most of this page. The full guide covers the wheel and betting layout.
What does every bet pay, and what is the house edge?
Below is the full payout table from Evolution's rules, with the theoretical RTP and house edge for each bet.
| Bet | Numbers covered | Payout | RTP | House edge |
|---|---|---|---|---|
| Straight Up | 1 | 25:1 | 97.00% | 3.00% |
| Split | 2 | 17:1 | 97.30% | 2.70% |
| Street | 3 | 11:1 | 97.30% | 2.70% |
| Corner | 4 | 8:1 | 97.30% | 2.70% |
| Line | 6 | 5:1 | 97.30% | 2.70% |
| Column | 12 | 2:1 | 97.30% | 2.70% |
| Dozen | 12 | 2:1 | 97.30% | 2.70% |
| Red / Black | 18 | 1:1 | 97.30% | 2.70% |
| Odd / Even | 18 | 1:1 | 97.30% | 2.70% |
| 1-18 / 19-36 | 18 | 1:1 | 97.30% | 2.70% |
Every row from Split down is unchanged from a plain European table: the payout, the numbers covered and the resulting 97.30% RTP are exactly what you would get on a wheel with no bonus feature at all. Only Straight Up is priced differently, because only Straight Up can trigger the Fireball Bonus. A Split, Corner or Dozen bet that happens to cover the winning number pays its listed odds regardless of whether that number carried a Fireball booster or sat inside the bonus grid.
That means most of a Fireball Roulette table is priced identically to standard roulette; only single-number bettors are exposed to the feature, for better and worse. The how to play guide covers placing each of these bets.
Why does Straight Up return less before the Fireball Bonus is added?
Because 25:1 alone is a worse bet than standard roulette's 35:1, and the shortfall has to be earned back through the bonus grid. On a 37-pocket wheel, a winning Straight Up bet at 25:1 returns (25 + 1) / 37 of every unit staked, which works out to about 70.3%. Standard roulette's 35:1 payout returns (35 + 1) / 37, or 97.30%, with no feature attached.
The gap between 70.3% and the published 97.00% target is roughly 26.7 percentage points, and Evolution fills it with the Fireball Bonus grid rather than a flat multiplier draw. Unlike a feature that strikes a fixed number of pockets before every spin, Fireball Roulette's bonus only fires when two conditions both hold: the winning number is one of that round's 3 to 7 Bonus Numbers, and you had a Straight Up bet sitting on it. A Straight Up bet on a number that was never marked as a Bonus Number simply collects the flat 25:1, nothing more.
That structure is why we can confirm the arithmetic behind the two RTPs but cannot confirm the RTP itself from our data alone; the next section explains what stands in the way.
What is the Fireball Bonus grid, and why can't we quote its actual payout?
The Fireball Bonus is a separate mini-game that plays only when a Straight Up bet wins on a Bonus Number, and it can be worth up to 2,500x, but our tracker cannot report what it actually pays. Here is the mechanism, and then the limitation.
Once betting closes, a virtual slot machine marks 3 to 7 numbers on the layout as Bonus Numbers for that round. Fireballs then rain down and land on some of those numbers, attaching a booster of 2x to 20x; a Bonus Number with no Fireball keeps no booster. Only after that does the real wheel spin. If the winning number is a Bonus Number and you had it covered Straight Up, a ball drops into a grid of 149 multiplier pockets holding Regular values from 30x to 500x alongside DOUBLE pockets. Landing on a Regular pocket pays that multiplier. Landing on DOUBLE doubles every Regular value remaining on the grid and relaunches the ball, and this can repeat several times before a Regular pocket is finally hit or every value reaches the 2,500x cap. If the triggering Bonus Number carried a Fireball booster, that booster then multiplies the grid result, still capped at 2,500x overall.
The limitation is in what our data can see. The feed we track records the Fireball booster (1x to 20x) attached to the winning number, not the outcome of the 149-pocket grid. That means our "multiplier" statistic tells you whether a Bonus Number was boosted going into the grid, never what the grid itself paid. A round with a 20x booster is not a "20x win"; it is a Straight Up bet entering the grid with its eventual Regular-pocket value multiplied by 20, and we do not know what that value turned out to be. The Fireball Bonus & Multipliers page covers the observed booster distribution in full; the point here is narrower: nothing in our data converts into an observed Straight Up return, because the decisive piece of the payout is not in the feed.
What are the odds a round triggers the Fireball Bonus?
The winning number was a Bonus Number, meaning the Fireball Bonus was live, in 11.39% of the 84,583 rounds our tracker logged over the last 90 days. That is close to the 11.69% rate implied by how many numbers get marked each round.
| Bonus Numbers drawn | Share of rounds (90 days) |
|---|---|
| 3 | 30.66% |
| 4 | 29.05% |
| 5 | 23.12% |
| 6 | 11.43% |
| 7 | 5.76% |
The average is 4.33 Bonus Numbers per round. Since the wheel has 37 pockets and the winning number is drawn independently of which numbers were marked, the chance any given round's winner falls among the Bonus Numbers is roughly 4.33 divided by 37, or 11.69%. Our observed 11.39% sits close enough to that figure to be ordinary sampling noise across 84,583 rounds. The average gap between triggers was 8.8 spins, and the longest gap in the window was 96 spins.
That 11.69% describes the table as a whole, not a single chosen number. Betting Straight Up on one specific number gives a chance of about (4.33 / 37) / 37, roughly 0.32%, close to 1 in 316, that this number is both a Bonus Number and the winner. Evolution's optional Fireball Chaser side bet lifts that to the full 11.69% (about 1 in 8.6) by automatically covering every Bonus Number after they are drawn, at a cost of roughly 13.6 times your chip size per round. Whether that trade is worth it is a bankroll question we work through on the strategy page.
How volatile is a Straight Up bet next to an outside bet?
A Straight Up bet in Fireball Roulette wins 2.70% of spins, the same 1-in-37 rate as any single number on a European wheel, but what it pays when it wins splits three ways. Outside bets have no such split; a win pays the same amount every time.
| Outcome when Straight Up wins | Share of wins | What it pays |
|---|---|---|
| Number was not a Bonus Number | 88.61% | Flat 25:1 |
| Number was a Bonus Number, no Fireball booster | 9.93% | Fireball Bonus grid result (30x-2,500x) |
| Number was a Bonus Number, with Fireball booster | 1.46% | Grid result multiplied by the 2x-20x booster, capped at 2,500x |
Those shares combine the 11.69% theoretical trigger rate with the 90-day split of bonus rounds: 87.16% entered the grid with no booster, 12.84% carried one. In practice, nearly nine out of ten Straight Up wins are just the flat 25:1 payout; the grid, when it fires, is where the RTP gap gets filled, and it is the least predictable part of the bet.
Outside bets carry none of this structure. Red, black, odd, even and the two 18-number ranges each win 48.65% or so of spins for a flat 1:1, as on a plain European table, which is why the strategy page treats them as the calm end of this game and Straight Up as the volatile end.
What is the maximum win, and what are the betting limits?
The maximum multiplier is 2,500x on a Straight Up bet, the cap on the Fireball Bonus grid after any DOUBLE pockets and booster multiplication are applied. On top of that multiplier cap, operators typically apply an overall cash cap around 500,000 in the account currency per player per round, which only binds at large stakes.
Our own booster data has a lower, separate ceiling worth keeping distinct from the 2,500x grid cap: the highest Fireball booster ever recorded is 20x, first seen on 2026-01-21 on number 24. In the last 90 days, a 20x booster landed on the eventual winning number eight times, on 2026-07-16, 07-18, 07-27, 08-09, 08-11, 08-15, 08-17 and 08-18. None of those rounds tell us what the grid itself paid, only that the booster applied to whatever the grid produced.
Betting limits are set by each operator rather than by Evolution, and typically run from around 0.10 or 0.20 per spot up to a few thousand at the high end, with Straight Up maximums often set lower than outside-bet maximums. Limits change how much of your bankroll a single spin risks, but they do not change RTP: a small Straight Up bet and a large one both return 97.00% in expectation.
Does the observed wheel match the theoretical numbers?
Yes. Over the last 90 days and 84,583 rounds, zero landed on 2.63% of spins against a theoretical 2.70%, and every color and dozen stayed within about a point of its expected share.
| Outcome | Theory | Observed (90 days) | Difference |
|---|---|---|---|
| Zero | 2.70% | 2.63% | -0.07 |
| Red | 48.65% | 48.75% | +0.10 |
| Black | 48.65% | 48.62% | -0.03 |
| Odd | 48.65% | 48.40% | -0.25 |
| 1-18 | 48.65% | 48.75% | +0.10 |
| Dozen 1 | 32.43% | 32.48% | +0.05 |
| Dozen 2 | 32.43% | 32.56% | +0.13 |
| Dozen 3 | 32.43% | 32.33% | -0.10 |
The busiest individual numbers over the same window were 12 (2.83%), 27 (2.79%) and 19 (2.79%); the quietest were 17 (2.58%), 3 (2.61%) and 24 (2.62%), all against a theoretical 2.70% per pocket. A spread that narrow across tens of thousands of spins is exactly what a fair single-zero wheel produces, and it confirms the physical wheel behind Fireball Roulette is priced the same as any other European table before the bonus layer is added.
Do the observed bonus-trigger and booster numbers match theory?
They are consistent with the published structure, though the underlying grid stays outside what we can measure. Two separate checks are worth running.
First, the trigger rate: 11.39% observed against 11.69% implied by the average 4.33 Bonus Numbers per round, a gap well inside normal variance for 84,583 rounds. Second, the booster mix across every Bonus Number drawn in the window, not just winners, which shows a specific and repeatable pattern.
| Booster | Share of Bonus Numbers drawn (90 days) |
|---|---|
| None | 87.32% |
| 2x | 4.06% |
| 3x | 4.02% |
| 4x | 1.88% |
| 5x | 1.26% |
| 7x | 0.75% |
| 10x | 0.46% |
| 15x | 0.20% |
| 20x | 0.05% |
The values step from 2x straight to 3x, then skip to 4x, 5x, 7x, 10x, 15x and 20x; boosters of 6x, 8x or 9x have never appeared in 365,889 Bonus Numbers drawn over 90 days, which points to a fixed, deliberately spaced paytable rather than a rounding artifact. Roughly seven in eight Bonus Numbers carry no Fireball at all, so most bonus triggers enter the 149-pocket grid unboosted, matching the 87.16% figure from the previous section.
Neither check reaches the RTP itself. What they confirm is that the Bonus Number count, the trigger rate and the booster distribution all sit where Evolution's published rules would put them. Nothing in 84,583 rounds contradicts the 97.00% and 97.30% figures; we simply lack the one number, the grid's own payout, that would let us verify RTP directly rather than by inference.
How do you read our Fireball Roulette RTP tracker, and is "live RTP" a signal?
The live stats page shows the number heatmap, the red, black and zero shares, Bonus Number and booster statistics and a drought tracker, each drawn from the same rounds used on this page. Read the heatmap and color splits as the wheel-fairness check above, over whichever window you select; a single day of roughly 450 rounds will swing individual numbers further than 90 days will, simply because the sample is smaller.
The booster panel shows how often Bonus Numbers carry a Fireball and at what strength, which is useful for understanding how frequently the grid gets a multiplier boost, but it is not a return figure and should not be read as one. The drought tracker counts spins since the bonus last triggered on the winning number; the longest such gap in 90 days was 96 spins, and a long count on the page does not raise the chance on the next spin, since each round draws its Bonus Numbers independently of the last.
That independence is also why "live RTP" readings are not useful here. A short window's observed return moves entirely on whether a Straight Up bettor's number happened to be boosted and how the unseen grid paid, both rare and lumpy events; it says nothing about the odds on the next spin, which stay fixed at 97.00% and 97.30% regardless of what just happened. Busiest hours on our tracker run 13:00 to 16:00 UTC, which affects table availability, not payout.
The wheel has no memory, and a losing streak on Straight Up is not a signal that a bonus is due. Treat the RTP figures on this page as a price: 3.00% on Straight Up, 2.70% on everything else, paid whether or not you ever see a Fireball fall. If you want tools for setting limits before a session rather than during one, the Responsible Gambling Observatory covers that ground, and our site-wide RTP monitor tracks this game alongside every other title we follow. Evolution's Lightning Roulette uses a different mechanism to fund a similar Straight Up trade-off, worth comparing if you are weighing the two.
Frequently asked questions
What is the RTP of Fireball Roulette?
Evolution's published RTP is 97.00% on Straight Up bets and 97.30% on every other bet, splits through outside bets. The 97.00% figure is lower than standard roulette's 97.30% because Straight Up pays a reduced 25:1 instead of 35:1, with the difference funding the Fireball Bonus grid, which can pay up to 2,500x when the winning number is a Bonus Number you covered.
Why does Fireball Roulette pay only 25:1 on Straight Up bets?
Because 25:1 alone would return just 97.00% only if nothing else changed, but on its own the reduced payout returns about 70.3%. The remaining 26.7 percentage points are paid through the Fireball Bonus grid, a 149-pocket multiplier feature worth 30x to 2,500x that only Straight Up bets can enter. A standard 35:1 payout would leave no margin to fund that feature.
What is the maximum win in Fireball Roulette?
The cap is 2,500x your Straight Up stake, reached through the Fireball Bonus grid's DOUBLE pockets, which repeatedly double every regular multiplier until one is hit or the cap is reached. A 2x-20x Fireball booster on the winning number multiplies that grid result further, still capped at 2,500x. Most operators also cap total cash payouts around 500,000 per player per round.
Does Fireball Roulette have the same house edge as European roulette?
Only on bets other than Straight Up. Split, street, corner, line, column, dozen and even-money bets pay standard European odds with a 2.70% house edge, identical to a plain single-zero wheel. Straight Up carries a higher 3.00% edge, because Evolution's official figure for that bet is 97.00% RTP rather than 97.30%.
How often does the Fireball Bonus trigger?
The winning number was a Bonus Number in 11.39% of 84,583 rounds our tracker logged over the last 90 days, close to the 11.69% rate implied by the average of 4.33 Bonus Numbers drawn per round. The average gap between triggers was 8.8 spins, with a longest observed gap of 96 spins. Only a Straight Up bet on the winning number actually enters the bonus grid.