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Parlay betting: why every extra leg costs more

A parlay, called an accumulator in most of the world, combines several selections into one bet. The odds multiply, so the payout grows fast, but every leg must win.

The margin multiplies too. Below we show how much each extra leg costs and how to work out a parlay's payout.

All legs must win Margin grows per leg 18+
2 legs
9.8% margin at 5% per leg
3 legs
14.3% margin at 5% per leg
5 legs
22.6% margin at 5% per leg
8 legs
33.7% margin at 5% per leg

Short answer

Is a parlay worth it?

It pays more when it wins, but you pay the margin on every leg. At 5% per leg, three legs cost about 14.3% of the stake on average and five legs about 22.6%. Singles are cheaper.

Single 5% margin assumed
3 legs 14.3% margin
5 legs 22.6% margin
All legs Must win one loss loses all

Worked example

A three-leg parlay in taka

  1. Multiply the odds

    Three legs at 1.50, 1.80 and 2.00: 1.50 × 1.80 × 2.00 = 5.40.

  2. Work out the return

    ৳100 at 5.40 returns ৳540 if all three win.

  3. Count the cost

    At 5% per leg the margin is about 14.3%, against 5% on a single.

Pattern

The margin grows with every leg

5% per leg

Accumulator margin by number of legs

What it means: every leg you add makes the bet more expensive on average, not just riskier.

Exception: a leg priced above its true chance adds value, but only if your estimate is right.

Calculated: 1 − (1 − margin per leg) ^ legs.

Glossary

Glossary

Accumulator
Several selections in one bet; all must win. So what: the margin grows with every leg you add.
Margin
The share of all stakes a bookmaker keeps on average, built into the odds. So what: a lower margin means more of your stake comes back over time.
Decimal odds
The total return per 1 taka staked, stake included. So what: stake × odds is what a winning bet pays back.
Stake
The amount you put on a bet. So what: fixed small stakes keep a losing run from emptying the account.

FAQ

What is a parlay?

One bet with several selections. All must win; one loss and the whole bet loses.

How are parlay odds calculated?

Multiply the decimal odds of the legs. Three legs at 1.50 give 1.50 × 1.50 × 1.50 = 3.375.

Why are parlays expensive?

The margin compounds. Three legs at 5% each carry about 14.3% in total, five legs about 22.6%.

Can legs be from the same match?

Only where the bookmaker allows it, usually as a bet builder. Linked outcomes in one match are priced differently from separate matches.

What happens if one leg is void?

That leg is usually removed and the parlay settles on the others at lower odds. Check the rules.

Is online betting legal in Bangladesh?

No. The Gambling Prevention Act 2026, passed on 1 July 2026, replaced the Public Gambling Act 1867 and makes online gambling and online betting offences, with prison terms of up to five and seven years respectively, or fines, or both. A bookmaker's foreign licence does not change this. See our responsible gambling page.