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Money Train 4
Money Train 4 is Relax Gaming's fourth and final entry in the Money Train series, played on a 6x6 grid with 40 paylines, a 96.50% RTP, very high volatility, and a 150,000x max win. The series' defining Money Cart respin bonus returns with over 20 unique modifier symbols, an upgraded Upgrader function, and two bonus buy paths: a standard entry at 100x stake and a Persistent Bonus at 500x that guarantees a Persistent Symbol in the bonus from the start.
Key takeaways
- RTP: 96.50% applies when buying the bonus. The base-game RTP is 96.10%. Check the info panel at your casino to confirm which applies.
- Volatility: very high, rated 5 out of 5. Most of the expected return concentrates in the Money Cart bonus rounds; long dry spells in the base game are normal.
- Max win: 150,000x your stake, the highest ceiling in the Money Train series.
- Money Cart bonus: three or more money symbols trigger the respin feature; they lock in place, respins reset to three on each new symbol, and the round ends when respins exhaust or all positions fill.
- Bankroll note: very high volatility on a game with a 100x or 500x bonus buy path means depleting a balance quickly is a real risk. Size each buy against the total session budget, not the spin stake.
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Our top-rated, vetted casinos that carry Money Train 4 and pay out reliably.
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How Money Train 4 differs from earlier entries
Money Train 4 plays on a 6x6 grid with 40 paylines, an expansion over the 5x4 grid of Money Train 2 and 3. The additional positions give more room for money symbols to land and interact during the Money Cart bonus, which is the direct mechanical reason the max win ceiling rises to 150,000x, three times the 50,000x of the second entry.
The Wild West steampunk aesthetic remains consistent with the series: outlaw strongbox tokens, train-carriage imagery, and the same core respin structure that established the series’ reputation. Money Train 4 is billed as the final entry in the series, and the modifier set is significantly expanded to reflect that.
The Money Cart respin: expanded modifier set
Three or more money symbols on the 6x6 grid trigger the Money Cart respin. Triggering symbols lock, three respins start, and each new money symbol that lands resets the counter to three. The round closes when respins exhaust or all positions fill.
The modifier variety is the distinguishing feature of the fourth entry. Over 20 unique symbol types can appear, including standard multiplier values, Persistent Symbols that apply a board-wide multiplier to all other values, Collector Symbols that sum existing board values into their own, Sniper Symbols that remove specific symbols to free positions, and the new Upgrader function that converts existing symbols into higher-value types mid-feature.
When a Persistent Symbol and a Collector Symbol share the board, the Collector sums the multiplied values produced by the Persistent Symbol’s effect, compounding the total rapidly. This interaction chain is what bridges the gap between a modest respin outcome and the 150,000x ceiling.
Two bonus buy paths and what they cost
The standard bonus buy enters the Money Cart directly for 100x your stake. The Persistent Bonus buy costs 500x your stake and guarantees a Persistent Symbol is on the grid at the start of the feature, removing the randomness of whether that key multiplier type even appears.
Both buys are priced so the long-run return matches the 96.50% RTP. Neither improves the expected value. The practical difference is variance control: the Persistent Bonus buy removes one layer of uncertainty at a higher cost per attempt, while the standard buy preserves full range but includes the possibility of a low-modifier-count round.
Living with extreme variance
Very high volatility means the distribution of outcomes is extremely wide. Many Money Cart rounds will produce modest totals when few symbols land before respins exhaust. The large wins require the counter to keep resetting, the grid to fill substantially, and high-value modifier interactions to compound.
On a game with this profile, repeated bonus buys of 100x or 500x without a significant result depletes a balance at a pace that low-volatility players find disorienting. The hit frequency of approximately 20% in the base game means wins occur roughly every five spins, but most are small. Budget for multiple bonus attempts with no large result as the base case.
Choosing where to play
Casinos on our crypto casinos list support fast settlement when a Money Cart round pays well. Confirm the RTP version in the game info panel before starting, and check whether the bonus buy is available at your specific casino, since some jurisdictions restrict bonus buy features.
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Frequently asked questions
Who created Money Train 4?
Money Train 4 was created by Relax Gaming, the same studio behind the full Money Train series. Relax Gaming developed, published, and distributes the title as the fourth and final entry in the franchise. The game is available through Relax Gaming's operator network, which means it appears at a wide range of online casinos rather than being exclusive to any one platform.
What is the RTP of Money Train 4?
Money Train 4 has two reported RTP figures. The base-game RTP is 96.10%, which applies when triggering the Money Cart bonus naturally. The bonus-buy RTP is 96.50%, which applies when purchasing the bonus directly. If your session mixes base-game play and bonus buys, the effective return sits between those figures. Confirm the RTP in the game's info panel at your casino before playing.
What is the maximum win on Money Train 4?
The maximum win on Money Train 4 is 150,000x your stake, the highest ceiling in the series. It requires the Money Cart bonus to fill the 6x6 grid with high-value modifier symbols, including interactions between Persistent and Collector types that compound the board total. It is the theoretical ceiling of the mechanic, not a realistic expectation from any individual bonus entry.
How does the Money Cart bonus work in Money Train 4?
Landing three or more money symbols on the 6x6 grid triggers the Money Cart respin. All triggering symbols lock in their positions and three respins begin. Each time a new money symbol lands it locks in place and the counter resets to three. The round ends when the counter reaches zero or all 36 grid positions fill. The accumulated value of all locked symbols is then paid as a single win.
What is the difference between the standard bonus buy and the Persistent Bonus?
The standard bonus buy costs 100x your stake and enters the Money Cart respin under normal starting conditions. The Persistent Bonus costs 500x your stake and guarantees a Persistent Symbol, which multiplies all other symbol values on the board, is present at the start of the round. The guaranteed Persistent Symbol raises the floor of the bonus outcome. Neither buy improves the house edge; both are priced to maintain the 96.50% RTP.
Is Money Train 4 suitable for small bankrolls?
No. Very high volatility combined with a base-game RTP below the bonus-buy RTP means the base game can exhaust a balance before the Money Cart bonus triggers naturally. Bonus buys at 100x or 500x per entry without large respin results drain a session quickly. The game suits players who can fund multiple bonus attempts and treat each as an independent event with a wide range of possible outcomes.
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