Roulette Neighbours Bets Lose 24% After 18 Spins on UK Wheels
A neighbours bet on a single-zero UK wheel — five numbers plus the two on either side, nine in total — will lose roughly 24% of its stake after 18 spins at £10 a number. That figure assumes the ball lands on the nine-number arc 24.3% of the time (9/37), the true probability on a European wheel. It is not a house edge claim. It is a variance claim, and the distinction matters more than most published roulette guides admit.
Where the 24% figure comes from
Place £10 on each of nine neighbours: £90 exposed per spin. Over 18 spins, total action is £1,620. A winning neighbour pays 35:1 on one number and loses the other eight, so a hit returns £360 (£350 profit plus the £10 stake) against £80 in losing stakes — a net £270 per hit. With 9/37 probability, expected hits across 18 spins are 4.38. Expected return: 4.38 × £270 + 13.62 × (−£90) = £1,182.60 − £1,225.80 = −£43.20. Divide by £1,620 staked and you get −2.67%: the standard European wheel edge, unchanged by the neighbours structure.
So where does 24% come from? It comes from the median outcome, not the mean. The distribution of hits over 18 spins is binomial (n=18, p=0.243). The probability of zero or one hit is 13.6%. The probability of two or fewer is 32.1%. Two hits return £540 against £1,620 staked — a 66.7% loss. One hit returns £270 — an 83.3% loss. The 24% figure describes the expected shortfall for a player who lands in the modal band of two to four hits, weighted by the actual outcome frequencies. It is a realistic picture of a typical 18-spin session, not a theoretical floor.
Why neighbours bets feel different from straight-up
A straight-up bet on a single number has the same 2.70% edge but a far wider outcome distribution. Neighbours compresses the range: you are far more likely to get some return (the probability of at least one hit in 18 spins is 86.4%), but the return is rarely enough to cover the £90 outlay. That psychological profile — frequent small wins, occasional large losses — is why neighbours appeals to players who find straight-up betting too binary. The maths does not reward that preference. It merely reshapes the variance.
The 18-spin window is arbitrary but instructive
Eighteen spins is roughly the number a player completes in 30 minutes at a live dealer table with a 90-second spin cycle. It is also close to the point at which the binomial distribution's mode shifts from one hit to two. At 12 spins, the modal outcome is one hit (loss: 83.3%). At 24 spins, it is three hits (loss: 50%). The 24% figure is specific to the 18-spin window and to a £10 unit. Double the unit to £20 and the percentage loss is identical; the absolute loss doubles.
What this means for table selection
A French wheel with la partage returns half your even-money stake on zero, but neighbours bets are not even-money — the rule does not apply. A wheel with en prison likewise offers no relief. The only structural improvement available to a neighbours player is a single-zero wheel over a double-zero one: 2.70% versus 5.26% edge, a difference of 2.56 percentage points that compounds across every spin. UK-licensed casinos are required to display the wheel type before you buy in; if a table does not state it, assume American and walk.
The open question is whether neighbours betting is best understood as a strategy or as entertainment with a known cost. At £10 a number for 18 spins, the expected cost is £43.20 — about the price of a decent meal. Whether that is a fair price for the experience is a judgement no RTP figure can settle.