Bet types explained, with the arithmetic done for you

By Elin Norrgård, casino analyst — updated August 2026

Most betting guides list the bet types and stop. That is the least useful part, because the names are obvious and the consequences are not. What matters is what each format does to the bookmaker's margin, and the answer differs enormously: a single carries the margin once, an accumulator carries it on every leg and compounds it, and a quarter-line handicap splits your stake in a way that changes the shape of the result entirely. This page works through the main bet types with euro examples in decimal odds, so you can see the cost rather than take my word for it. Every example uses €10 for comparability.

Single bets: one selection, one margin

Every slip starts with the single/parlay choice: one selection standing on its own, or several tied together so that all of them must win. A single backs one outcome. Stake €10 at 2.40 and the bet returns €24 if it wins — €14 profit plus the stake back — and nothing if it loses. That is the whole format, and it is the one most experienced bettors use almost exclusively.

The reason is the margin. A typical three-way football market prices at around 104 percent implied probability, so roughly 4 percent of the money staked is the bookmaker's take. On a single you pay that 4 percent once. Every other bet type in this guide is, mathematically, a way of paying it more than once in exchange for a bigger headline return.

Accumulators: where the margin compounds

An accumulator, parlay or acca combines several selections into one bet. The odds multiply and every leg must win. Four legs at 1.80 each produce total odds of 1.80 × 1.80 × 1.80 × 1.80 = 10.4976, so €10 returns about €105.

That looks like the best value on the page. It is the worst. Here is why, with the numbers.

• Assume each of those 1.80 prices carries a 4 percent margin, so the fair price is closer to 1.87.
• Four fair legs would be 1.87⁴ ≈ 12.23, meaning the fair return on €10 is about €122.
• You were offered €105. The bookmaker has taken roughly 14 percent, not 4 percent.

The margin compounds because it is applied to each leg and the legs multiply. Two legs cost about 8 percent, six legs about 22 percent, ten legs well over a third of the stake in expectation. A ten-fold accumulator is not a long shot with a big prize; it is a lottery ticket sold at a lottery ticket's price. If you enjoy them, treat them as entertainment spending with a small fixed stake, and keep the leg count short.

One further trap: correlated legs. Backing a team to win and the same match to go over 2.5 goals feels like two opinions and is largely one. Bookmakers either block the combination or price it as a "bet builder" with an extra margin on top.

System bets: accumulators with a safety net

A system covers every possible combination of a given size from your selections. The common one is a Trixie — three selections producing three doubles and one treble, so four bets from one slip. Stake €10 per line and the slip costs €40.

With three legs at 2.00 each: all three winning returns €40 from the treble (8.00 × €10 minus nothing) plus €40 from each of the three doubles at 4.00, totalling €200 from a €40 outlay. Two winners return €40 from the one successful double — your stake back, no profit. One winner returns nothing.

So the safety net is real but shallow, and it is bought by staking four times as much. Systems suit a bettor who has three genuine opinions and wants partial payment for being mostly right. They do not suit filling a slip with hopeful picks, because the multiplied stake magnifies a bad selection just as efficiently as a good one.

Handicaps: Asian and European

A handicap gives one side a virtual head start, which is how a lopsided match is turned into a roughly even-money bet. The two families work differently and the difference matters.

European handicap keeps three outcomes. A team at -1 must win by two or more for the bet to win; win by exactly one and the bet loses, because the handicapped scoreline is a draw and the draw is a separate selection you did not back.

Asian handicap removes the draw. A team at -1.0 winning by exactly one gives you a push: the stake is returned in full, no profit, no loss. That single rule is why Asian lines are the more efficient product and why their margin is typically 2 to 3 percent rather than 4 to 6.

Quarter lines split the stake across two adjacent handicaps. Back a team at -0.75 for €10 and you have effectively placed €5 at -0.5 and €5 at -1.0. Win by two or more: both halves win. Win by exactly one: the -0.5 half wins and the -1.0 half pushes, so you collect half the expected profit. Draw or lose: both halves lose. Once you can read that, the quarter line becomes the most precise instrument on the board.

Over/under totals, including half and quarter lines

The over/under market ignores who wins and asks only whether a counted statistic finishes above or below a line. Goals in football, points in basketball, games in tennis, runs in cricket. A line of 2.5 goals cannot be tied, which is why totals are most often set on a half.

Whole-number lines behave like whole-number handicaps: over 2.0 with exactly two goals is a push and the stake comes back. Quarter lines split again — over 2.25 is half at over 2.0 and half at over 2.5, so exactly two goals gives you half a stake back and half a stake lost.

A €10 bet on over 2.5 at 1.95 returns €19.50 if three or more goals are scored. The equivalent under bet at 1.90 tells you something useful on its own: the two prices together imply 51.3 percent plus 52.6 percent, or 103.9 percent, so this market carries about 3.9 percent margin. Totals in major football are among the sharper markets on the board precisely because so much money goes through them.

Draw no bet, double chance and both teams to score

Three derived markets that are simply repriced versions of the main one.

• Draw no bet returns the stake if the match is drawn. It is identical to an Asian handicap of 0.0, and the price is always lower than the straight win because you are buying insurance.
• Double chance covers two of the three outcomes. Home or draw at 1.30 sounds safe and pays €13 on €10 — a market where the margin is easy to hide because the return is small enough that few people check it.
• Both teams to score asks only whether each side finds the net. It is popular, it is heavily bet, and the margin is usually a point or two above the main market.

Player props and futures

Player props — goalscorers, shots on target, points, rebounds, dismissals — reward genuine knowledge of team rotation and role, and they carry margins of 8 to 15 percent because the bookmaker knows pricing individual behaviour is hard. First goalscorer is the most expensive market on a typical football page. Treat props as small stakes on genuine opinions, never as filler for an accumulator.

Futures are the season-long markets: outright winner, top four, relegation, top scorer. Their prices carry heavy margins — a 20-team outright market can total 115 percent or more — and your money is tied up for months. They are best treated as a season-long entertainment purchase rather than as a value proposition.

Choosing a format and sizing the stake

1. Default to singles. They pay the margin once and keep the record readable.
2. Keep any accumulator to three or four legs, staked small, and understand it is entertainment.
3. Use Asian handicaps and totals when you have an opinion about a match's shape rather than its winner — the margins there are the lowest available.
4. Stake one to two percent of the bankroll per bet, flat. Not more after a loss, not more after a win.
5. Log every bet with the odds you took. Your own record is the only honest measure of whether any of this is working.

Frequently asked questions

Related guides: Sportsbook overview · Football · Basketball

None of these formats overcomes the margin on their own. Set a stake plan before the fixtures start, and use the responsible gambling tools if betting stops being a hobby.

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