Short answer: decide how much you can afford to lose before you play, split it into session bankrolls, bet about 1–2% of a session bankroll per spin, and set a loss limit, a time limit and a win goal in advance. Then treat whatever you lose as the price of the entertainment.

Step 1: Set an entertainment budget

Start with money that is left over after bills, savings and everything else you need. Roulette money should be money you would be fine spending on a night out. Never use borrowed money, credit, or money set aside for something else.

Pick a monthly amount, for example €200, and treat it as spent the moment you decide on it.

Step 2: Split it into session bankrolls

Divide the monthly budget by how many times you plan to play. €200 for four evenings gives you a €50 session bankroll. When a session's bankroll is gone, that session is over. You don't borrow from next week's.

Step 3: Size your bets

A common rule is a base bet of about 1–2% of the session bankroll. With €50, that's €0.50 to €1 a spin, which gives you 50 to 100 bets before the money runs out. Bigger bets mean bigger swings and a shorter session; smaller bets stretch the fun.

Be careful with progressions like Martingale that double after a loss. They can use up a whole bankroll in a few spins. See Does the Martingale strategy work?

Step 4: Set three limits before you start

  • Loss limit: your session bankroll. When it's gone, you stop. Never top up mid-session.
  • Time limit: decide how long you'll play, for example one hour, and stop at that time whatever the balance.
  • Win goal: decide when to walk away ahead, for example when you're up 50% of your bankroll. The longer you play, the more the house edge pulls you back, so locking in a good session matters.

Write the limits down or put them in your phone. Decisions made in advance are much easier to keep than decisions made at the table.

Step 5: Know what an hour really costs

On average, roulette costs the total amount you bet × the house edge. The house edge is 2.70% on European roulette and 5.26% on American (see European vs American roulette odds).

A busy live table might run around 30–40 spins an hour; online games, especially automated ones, can be much faster. Try your own numbers:

Total bet
–
Expected cost
–
Typical range*
–

*For a flat bet on red/black: about 2 in 3 sessions end within this range. The rest end further out, in either direction.

The expected cost is what you pay on average. Any one session can end well above or below it, which is what the typical range shows. If the cost is more than you'd happily pay for the same hours of other entertainment, lower the bet or play fewer spins.

Step 6: Keep a record

Most players remember their wins and forget their losses. Writing down each session (date, start and end balance, time played) shows you what roulette really costs you, and whether you're keeping to your limits. RIM PRO does this automatically: it logs every spin, shows your running balance, keeps a history per session and casino, and prompts you to stop when a session is ahead.

Warning signs to take seriously

Stop and take a break if you notice any of these:

  • Chasing losses, or raising bets to win back what you lost.
  • Playing longer or with more money than you planned.
  • Borrowing money, or using money meant for bills.
  • Hiding your gambling from people close to you.
  • Playing to escape stress or low mood.

Free, confidential help is available from BeGambleAware and from national helplines in most countries. Most casinos and gambling sites also offer deposit limits and self-exclusion; use them.