Roulette machines, often found in UK betting shops, are a common feature that many people are curious about.
If you've ever stood in front of one of these terminals and wondered whether it's fair, or how it actually works, you're not alone. This guide will explain exactly what bookies' roulette machines are, how they function, and whether you have a fair opportunity when using them.
We’ll look at how the outcomes are decided, what terms like “house edge” really mean, and whether these games are fixed in any way. If you're new to gambling, or just want to understand more about how roulette machines operate in UK bookmakers, this is for you.
How Random Are Bookies Roulette Machines?
Roulette machines in UK betting shops use something called a Random Number Generator (RNG) to determine results. An RNG is a computer programme designed to pick numbers completely at random. This means that the outcome of each spin is independent from the last one — it doesn’t follow a pattern, and it doesn’t “remember” any past results.
Each number from 0 to 36 (in European roulette, which is most commonly used in UK bookies) has an equal chance of landing on any given spin. The RNG ensures that the probability of any specific number coming up is 1 in 37, or around 2.7%.
These systems are not just installed and forgotten about. They are routinely tested by independent companies that are approved by the UK Gambling Commission (UKGC). These tests confirm that the machines are operating fairly, without interference or bias. If the machine passes these tests, it can be used legally in a betting shop in the UK.
The important takeaway here is that outcomes are designed to be random and cannot be influenced by players, staff, or the betting shop itself.
Are Bookies Roulette Machines Fixed?
No, these machines are not fixed in the way some people might assume. The way they are set up means they don’t need to be manipulated to ensure the bookmaker makes a profit. This is because roulette — like all casino-style games — includes something called a house edge.
The house edge is a mathematical advantage built into the game. It’s what allows the bookmaker to make money over time. For European roulette, the edge comes from the single zero on the wheel. This means that while there are 37 possible outcomes, potential payouts are based on 36. For example, if you place a bet on a single number and it wins, you’ll be paid 35 to 1 — even though your chance of winning was 1 in 37.
This difference is where the house earns its long-term margin. For players, it means that while it’s possible to win, the design of the game will most likely favour the bookmaker over many spins.
Importantly, these machines do not adjust or alter the results based on your betting behaviour. The outcome of one spin has no impact on the next. There’s no hidden algorithm trying to stop you from possibly winning. The fairness of these games is part of what the UKGC strictly monitors.
Can You Win At Bookies Roulette?
Yes, it’s possible to win when playing roulette at a bookmaker’s machine. But any wins are random and cannot be predicted. There is no strategy or system that can guarantee success, because the game isn’t based on skill. It’s a game of chance, meaning outcomes are unpredictable by nature.
Some players might try different betting patterns, like increasing their stake after a loss (commonly known as the Martingale system), but it’s important to remember that these do not affect the actual odds. The probability of a red or black number landing remains 18 in 37 for each — or just under 49%, after factoring in the single zero.
What works best for one person may not work for another. That’s because each spin is a standalone event. There is no “hot” or “cold” number and no guaranteed method that improves your odds. Some people prefer betting on outcomes with higher chances, such as red/black or even/odd, which pay out at 1 to 1 if successful. Others might go for options like betting on a single number, which can pay more but usually wins less often.
If you’re playing, consider setting a limit for how much money and time you are comfortable spending. It may also be a good idea to take breaks and avoid chasing losses. Gambling can be enjoyable as a recreational activity, but it’s important to keep it within boundaries that work for you.
If you ever feel it’s becoming too much, confidential support is available through organisations such as BeGambleAware.org or GamCare. They offer advice, tools and support for anyone concerned about their gambling.
*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to these games are subject to change at any time. Game features mentioned may not be available in some jurisdictions.
**The information provided in this blog is intended for educational purposes and should not be construed as betting advice or a guarantee of success. Always gamble responsibly.