What is a Lucky 15?

A Lucky 15 is a full-cover bet on 4 selections consisting of 15 bets: 4 singles, 6 doubles, 4 trebles, and 1 fourfold accumulator. Because it includes singles, any single winner returns something — unlike a Yankee, which covers the same selections without singles and requires 2 winners for any return.

The Lucky 15 is one of the most popular multiple bets in UK racing, particularly on days with competitive cards when punters want four fancied horses to work in combination.

How to Use the Lucky 15 Calculator

1. Enter your unit stake (the stake per individual bet — total cost is 15x your unit stake)
2. Enter the odds for each of your 4 selections in any format
3. Mark which selections won (or enter each way terms for racing bets)
4. Read your total return broken down by combination type

A £1 each-way Lucky 15 costs £30 total (15 win bets + 15 place bets at £1 each).

The 15 Bets Explained

From 4 selections (A, B, C, D):

4 Singles: A, B, C, D

6 Doubles: AB, AC, AD, BC, BD, CD

4 Trebles: ABC, ABD, ACD, BCD

1 Fourfold: ABCD

All 15 bets run at the same unit stake. The calculator multiplies odds across each combination and sums all winning bet returns.

The Maths: A Lucky 15 Example

£1 unit stake Lucky 15, total cost £15. Four horse racing selections at decimal odds 3.0, 4.0, 5.0, 6.0. All four win.

• Singles: £3 + £4 + £5 + £6 = £18
• Doubles: (3x4=12) + (3x5=15) + (3x6=18) + (4x5=20) + (4x6=24) + (5x6=30) = £119
• Trebles: (3x4x5=60) + (3x4x6=72) + (3x5x6=90) + (4x5x6=120) = £342
• Fourfold: 3x4x5x6 = 360 → £360
• Total return: £839 from £15 staked

If only one selection wins (selection A at 3.0): only the single pays — £3 return. A small consolation, but better than nothing.

UK Bookmaker Bonus Rules

Most major UK bookmakers offer bonus terms on Lucky 15 bets:

One winner bonus: If only one selection wins, many bookmakers pay double the single odds. On a £1 Lucky 15 with one winner at 5/1, you receive £12 (double the normal £6) rather than the standard £6.

All four winner bonus: If all four selections win, some bookmakers add a 10–15% bonus to total returns. Terms vary significantly between bookmakers — always check before placing.

The Lucky 15 calculator includes fields for applying these bookmaker-specific bonuses so your return estimate is accurate.

Tips and Strategies

• Use the Lucky 15 when you want singles coverage. If you are happy with any winner returning something, the Lucky 15 beats the Yankee despite the higher cost.
• Each way Lucky 15s work well in horse racing. In races where placed returns are valuable (large fields, competitive handicaps), the each-way version provides significant downside protection.
• Check bookmaker bonus terms. The one-winner bonus can dramatically alter the value of a Lucky 15 on short-priced selections. At evens or odds-on, the bonus often does not compensate for the higher stake requirement.
• Choose selections at 2/1 or above. Singles at very short prices barely contribute to the return when combined with the higher total stake.