What is the difference between inside bets and outside bets in online roulette and how do they affect risk?

Roulette's betting grid is split into two physically distinct zones, and which zone you play in is the single biggest decision shaping your risk profile each spin.

Inside bets: high reward, low hit rate

Inside bets are placed on the number on the table that corresponds with the number on the wheel you think the ball will land on. You can bet a single number, split two adjacent numbers, cover a three-number street, a four-number corner, or a six-number line. Payouts scale with how many numbers you cover — a straight-up single number pays 35:1, a two-number split pays 17:1, a three-number street pays 11:1, and a four-number corner pays 8:1.

That 35:1 payout sounds spectacular, but here's the catch: a single number bet's true odds are 37 to 1 because there are 38 pockets on the wheel — including 0 and 00 — but it only pays 35 to 1. That difference, caused by the 0 and 00, is where the house gets its edge. You win less often, and when you do win, you're paid slightly less than true odds. The variance is steep — you can go many spins without a hit, then land a big one.

Outside bets: lower payout, more frequent wins

Outside bets allow you to bet on whether the winning number is high or low, odd or even, red or black, or part of the first, second or third dozen number groupings — and they carry better odds but lower payouts of 1:1 (even-money) or 2:1. Betting red/black or odd/even means you're covering just under half the wheel (the zero pockets aren't included in these groups), so you'll win more often — but each win only doubles your stake.

You can make choices on how to bet and the level of risk and reward you want, but you can't use skill to influence the outcome of the game. It's 100% random. That's the part no bet type changes.

What this means for your bankroll in practice

The house edge is the same across almost all bets in a given wheel variant — in American roulette it's 5.26% averaged across all bets. The one bet that breaks that rule badly is the five-number Top Line (0, 00, 1, 2, 3): the house edge on that bet is 7.29% — much higher than the 5.26% average for American roulette. Avoid it.

The practical difference between inside and outside bets isn't the house edge — it's volatility. Inside bets produce a choppy ride: long dry spells punctuated by large payouts. Outside bets produce a smoother ride: smaller, more frequent wins that keep your balance moving gradually. Sticking to outside even-money bets (1:1) and playing at tables with the lowest minimums will help make your budget last longer.

Wheel choice matters too. The European single-zero wheel carries a house edge of only 2.7%, compared to the American wheel's 5.26%. If the site you're playing on offers both, the European version is the straightforwardly better deal on every bet type.

If you ever want to set deposit or loss limits — a sensible move given how fast roulette moves — Ontario's licensed operators are required to offer these tools, and if you need a break from all platforms at once, BetGuard (betguard.ca) is Ontario's centralized self-exclusion service, letting you opt out of every regulated site in a single step. You can spot a legitimate Ontario site by the iGaming Ontario and BetGuard logos it displays. Play is for adults 19+; ConnexOntario (1-866-531-2600) is there if gambling ever feels like more than entertainment.