Betting systems · 24+8 calculator · checked 7 October 2026
24+8 Roulette System: How the 32-Number Strategy Works and What It Costs
The 24+8 roulette system (also written 24 plus 8) puts 8 units on each of two dozens and 1 unit on each of eight numbers in the dozen that’s left: £24 a spin with a £1 chip. It covers 32 of the 37 pockets on a European wheel: 24 give your £24 back, 8 make a £12 profit, and 5 lose the lot. So 86.49% of spins don’t lose, but only 21.62% make money, and the layout still costs 2.70% of everything you bet, about 65p a spin at £24. In our simulation of 50-spin sessions at a £5 chip on a European wheel, it finished ahead more often than the 24+10 (the £150 strategy), and because it bets less each spin it also lost less on average.
One test on a verified account, so yours may differ. 18+. T&Cs apply. Affiliate link. UK-licensed casinos only. Play responsibly.
18+. T&Cs apply. Affiliate link. UK-licensed casinos only. Play responsibly.
Quick answer
What Is the 24+8 Roulette System?
The 24+8 roulette system is a flat-stake layout of ten bets: two £8 dozen bets and eight £1 single-number bets, £24 every spin. A dozen win gives you your £24 back, one of your eight numbers makes £12, and the five uncovered pockets lose everything. It feels safe because you rarely lose, but it doesn’t change the 2.70% house edge, and two £12 wins are needed to cover one £24 loss.
A dozen wins: 24 pockets
The £8 dozen bet pays 2 to 1, so £24 comes back. You break even.
One of your numbers: 8 pockets
£1 at 35 to 1 returns £36 from your £24.
Not covered: 5 pockets
0, 15, 18, 21 and 24 lose all ten bets.
The name counts numbers, not units: 24 from two dozens plus 8 single numbers makes 32 covered. Some sites call a layout with ten single numbers “24+8”, but that covers 34 and is really 24+10, the £150 roulette strategy at a £5 chip.
How to place it
How to Place the 24+8 Roulette Strategy
- £8 on the 1st 12An eight-unit bet on the first dozen covers 1 to 12.
- £8 on the 3rd 12A second eight-unit bet on the third dozen covers 25 to 36.
- £1 on eight numbersOne unit each on 13, 14, 16, 17, 19, 20, 22 and 23, leaving 0, 15, 18, 21 and 24 uncovered.
- Keep the stakes flatThe same ten bets every spin. Past spins don’t change the next one, so there’s nothing to chase.
Any eight numbers in the dozen you leave out work the same, and any two dozens do too. We use 13, 14, 16, 17, 19, 20, 22 and 23 because they pair up into four splits, which gives the cheaper version further down. Hot, cold or overdue numbers don’t help.
New to inside bets? Our straight-up bet guide shows how to place a chip on a single number, the roulette table layout shows where the dozen boxes sit, and you can practise the whole layout on our free roulette tables.
Results
24+8 Odds, Returns and Net Results
Every spin lands in one of three results. “Back” includes the winning bet’s stake; the result compares it with the full £24 you placed.
Why 86.49% Isn’t the Win Rate
86.49% is the chance of not losing on one spin, not the chance of winning. 24 of the 32 covered pockets only give your stake back. Only your eight numbers make money, so the chance of a profit is 8 in 37, or 21.62%.
(24 × £0 + 8 × £12 − 5 × £24) ÷ 37 = about −65p a spinOn average, £96 won and £120 lost every 37 spins: a net £24 lost from £888 bet, which is 2.70%, the standard European house edge.
Two wins to cover one loss. One uncovered number costs £24 and each number win makes £12, so it takes two of them to get back to level. Break-even spins don’t move your balance either way.
Where to play
Where to Play the 24+8 System Online
Four UK-licensed casinos where we’ve timed a real withdrawal. Each time is one test on a verified account, so yours may differ. Check that the table accepts your chip on every single number and that both dozen bets fit under its outside maximum.
Play KasinoSkill On Net · UKGC 39326Our payout test£644 to PayPal in 36 minutes
Tested 29 September 2026, from asking for the money to it landing.
PlayOJOSkill On Net · UKGC 39326Our payout test£150 to PayPal in 1 hour 47 minutes
Tested June 2026, from asking for the money to it landing.
21PriveWhite Hat Gaming · UKGC 52894Our payout test£100 to Neteller in 2 hours 20 minutes
Tested June 2026, from asking for the money to it landing.
Swift CasinoSkill On Net · UKGC 39326Our payout test£200 to a Visa debit card within 24 hours
Tested June 2026, from asking for the money to it landing.
18+. T&Cs apply. Affiliate links. UK-licensed casinos only. Play responsibly.
24+8 calculator
24+8 Roulette Calculator: Straight-Ups or Splits
Pick the version, your chip, the wheel and a winning number. The calculator shows what comes back, the odds of each result, and what the house edge costs over a session. The chip is what goes on each number or split; each dozen gets eight of them (four with splits).
- Chance of a profit
- 21.62%
- Lose everything
- 13.51%
- Full loss at least once in 10 spins
- 76.59%
- Bet over 10 spins
- £240
- Average loss
- £6.49
Number 7 is in the 1st 12: the £8 dozen bet pays 2 to 1, so £24 comes back from £24 staked. You break even.
Standard payouts: 2 to 1 on each dozen, 17 to 1 on a split and 35 to 1 on a single number. La Partage doesn’t apply to any of these bets, so a French wheel gives the same results as a European one. “Average loss” is the house edge on the session’s total bet: 2.70% on a single-zero wheel and 5.26% on an American one. Any real session can finish well above or below it. For smaller chips, our low-stakes roulette guide covers where 10p and 20p bets are accepted.
18+. T&Cs apply. Affiliate links. Play responsibly.
24+8 simulator
24+8 vs 24+10 Simulator
The same chip on the same spins, two layouts: the 24+8 (24 units a spin) and the 24+10, which adds 15 and 18 and puts 10 units on each dozen (30 units a spin, the £150 strategy at a £5 chip). Pick a bankroll, chip, session length and wheel; the simulator plays 30,000 sessions.
Over 50 spins, the 24+8 finished ahead in 31.2% of sessions against 26.3% for the 24+10, and ran out of money in 36.5% against 40.5%. The average result was −£130.12 against −£162.02, from £5,026.63 and £6,108.05 bet on average.
A simulation of 30,000 sessions with a fixed seed, so the same settings always give the same figures. Both layouts use the same chip on the same spins, and each stops when its money left is less than its own stake; “Ran out of money” counts sessions that had to stop before their last spin. Over 10 spins the 24+10 finishes ahead more often, because it loses everything on only 3 pockets, so it’s more likely to avoid a full loss altogether. Over 25 or more spins, full losses are likely for both, and the 24+8 recovers faster (two number wins against five) and loses less a spin, so it finishes ahead more often in every setting. When either can run out, the 24+8 usually runs out less often; with a few bankrolls it runs out slightly more often, by under a point. Both lose the same share of what they bet on average: 2.70% on a European wheel and 5.26% on an American one. Table limits are ignored.
Split version
The Split Version: Same 32 Numbers for Half the Stake
If your eight numbers form four pairs that share a border, four £1 splits cover them instead of eight £1 chips. With £4 on each dozen, the layout costs £12 a spin and every result is exactly half: £0, +£6 or −£12. The odds and the 2.70% edge don’t change; you just bet less each spin and place six bets instead of ten.
A split pays 17 to 1, so a £1 split returns £18. Our split bet guide shows which numbers share a border on the table.
Repeated spins
How Quickly Does a Full Loss Turn Up?
A 13.51% chance of losing everything looks small on one spin, but it adds up. Over 10 spins there’s a 76.59% chance of at least one full loss, and over 20 spins it’s 94.52%. The average loss grows in step with what you bet: about 65p for every £24.
At least one £24 loss, £1 chip, European wheel
How many full layouts a bankroll covers
The chance of at least one full loss is 1 − (32/37) to the power of the number of spins. It isn’t the chance that the session finishes behind, because number wins can make up for a loss. Two full losses on two particular spins in a row have a 1.83% chance, (5/37) × (5/37), but a long session has many pairs of spins. A bigger bankroll only pays for more layouts; there’s no bankroll that makes the system work.
Compared
24+8 vs 24+10 and the £150 Strategy
The 24+10 adds two more single numbers and raises each dozen bet to 10 units so a dozen win still breaks even. It covers 34 numbers instead of 32 and makes a profit more often, but each number win pays half as much (+6 units against +12) and it bets 30 units a spin instead of 24. At a £5 chip the 24+10 is the £150 roulette strategy. Both have the same 2.70% edge.
Verdict
Does the 24+8 Roulette System Work?
It works as a set of instructions: dozen wins break even, your eight numbers make 12 units, and five pockets lose the lot, exactly as described. It doesn’t work as a way to win: the layout loses 2.70% of what you bet on a European wheel, the same as any single bet. What it changes is how a session feels, with lots of spins that leave your balance unchanged.
Wheels
European, French and American Wheels
The layout works as described on European and French roulette. La Partage doesn’t help, because it only covers even-money bets. On an American wheel, 0 and 00 both lose everything, so six pockets wipe out the stake and the edge rises to 5.26%.
Lightning and multiplier games: in Lightning Roulette, straight-ups usually pay 29 to 1 unless the number is struck by a multiplier, so a plain hit on one of your numbers returns £30 from £24, a £6 profit instead of £12. Check the paytable before using these figures on any multiplier game.
UK rules
Playing the 24+8 System at a UK Casino
No Gambling Commission rule bans betting systems, but many casino bonuses exclude roulette or count it at a low rate, and bonus terms often ban covering more than a set share of the table, which this 32-number layout does. Winnings can be voided, so check the terms before you play with bonus money. These are the rules that shape how you play at a UK-licensed casino.
No autoplay
Autoplay is banned, so you start every spin yourself. A rebet button repeats all ten bets (six with splits) in one tap.
At least 5 seconds a spin
An online roulette game can’t start a new spin within 5 seconds of the last one starting, so 100 spins take at least eight minutes.
Your spend on screen
Games show your net spend and how long you’ve been playing, so a run of break-even spins can’t hide what you’ve lost.
A limit before you deposit
New customers are asked to set a financial limit, such as a deposit limit, before their first deposit.
Before You Place the Layout
Good to know
24+8 Roulette System FAQs
What is the 24+8 roulette system?
It’s a flat-stake layout: 8 units on each of two dozens and 1 unit on each of eight numbers in the remaining dozen, 24 units a spin. It covers 32 of the 37 pockets on a European wheel. A dozen win gives your stake back, one of your numbers makes 12 units, and the other five pockets lose everything.
What does 24+8 mean in roulette?
It counts the numbers covered: 24 from two dozen bets, plus 8 single numbers in the dozen that’s left. That makes 32 of 37 pockets. You’ll also see it written as 24 plus 8, 24 + 8 or the 24 8 roulette system.
Does 24+8 cover 32 or 34 numbers?
The 24+8 covers 32. Some sites use the name for a layout with ten single numbers, which covers 34. That’s really 24+10, and at a £5 chip it’s the £150 roulette strategy.
What is the correct 24+8 staking ratio?
Each dozen bet is eight times your single-number chip: £8 on each dozen with £1 chips. That makes a dozen win return exactly the £24 you staked. With splits, each dozen is four times the split chip.
Can four splits replace eight straight-up bets?
Yes, if your eight numbers form four pairs that share a border, such as 13/14, 16/17, 19/20 and 22/23. Four £1 splits with £4 on each dozen cover the same 32 numbers for £12 a spin. Every result is exactly half: £0, +£6 or −£12.
Is 86.49% the win rate?
No. 86.49% is the chance of not losing on one spin. Only your eight numbers make money, so the chance of a profit is 8 in 37, or 21.62%. The other 24 covered pockets just give your stake back.
Which eight numbers should I choose?
Any eight numbers in the dozen you leave out give the same odds, and any two dozens work. We use 13, 14, 16, 17, 19, 20, 22 and 23 because they also pair up into four splits. Hot, cold or overdue numbers make no difference.
What happens when zero lands?
Zero is one of the five uncovered pockets, so every bet loses. La Partage on French roulette only covers even-money bets, so it doesn’t help with dozens, splits or single numbers.
Can I use 24+8 on American roulette?
You can, but 00 becomes a sixth uncovered pocket. The chance of losing everything rises to 15.79% and the house edge to 5.26%.
Does the 24+8 system change the house edge?
No. On a European wheel you lose 24 units for every 888 you bet on average, which is 2.70%, about 65p a spin at £24. The layout only changes how often you break even, win or lose.
Is the 24+8 better than the £150 strategy?
Neither beats the house edge. In our simulation of 50 spins at a £5 chip with £500 on a European wheel, the 24+8 finished ahead in 31.2% of sessions against 26.3% for the 24+10 (the £150 strategy), and ran out of money in 36.5% against 40.5%. It bets less each spin, £120 against £150, so it also lost less on average: −£130.12 against −£162.02. Over just 10 spins, though, the 24+10 finishes ahead more often.
Can I use autoplay for the 24+8 system?
Not at a UK-licensed online casino. Autoplay has been banned since January 2025, so you start every spin yourself; a rebet button can repeat the whole layout in one tap.
Our method
How We Checked This Guide
What we checked
The odds and returns on this page come from exact roulette maths: 37 pockets on a European or French wheel and 38 on an American one, with standard payouts of 2 to 1 on a dozen, 17 to 1 on a split and 35 to 1 on a single number. The straight-up layout is 8 units on each of the 1st and 3rd 12 and 1 unit on each of 13, 14, 16, 17, 19, 20, 22 and 23; the split layout is 4 units on each dozen and 1 unit on 13/14, 16/17, 19/20 and 22/23. The 24+10 in the simulator uses the same dozens at 10 units and adds 15 and 18. The simulator figures come from a seeded simulation of 30,000 sessions per setting. The UK rules come from the Gambling Commission, checked on 7 October 2026. We haven’t checked table limits at every casino, so check each table’s minimums and maximums.
Written and reviewed by Mark Taylor.
Keep reading
More Roulette Systems
A Steady Balance Isn’t a Winning One
About two spins in three with this layout leave your balance where it was, which can make a session feel safe while the £24 losses quietly add up. Decide your budget and when you’ll stop before you start, set a deposit limit, and never raise your chip to win back a loss.
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