Price boost

The sum is simple: the extra you collect is your stake multiplied by the gap between the boosted and standard decimal odds. Take a horse at 5/1 boosted to 6/1. In decimal that is 6.00 moving to 7.00, so each euro staked returns one euro more if the horse wins.

Implied probability tells you what the boost actually gives away. At 5/1 the price implies a chance of 1 in 6, or about 16.7%; at 6/1 it implies 1 in 7, about 14.3%. The bookmaker is now pricing the horse as if it were less likely to win than its own main market suggests, and that two-and-a-bit point gap is the whole of the offer.

Whether that gap is genuine value depends on the margin built into the original price. A standard 5/1 from a book running a heavy overround may sit below what other firms or the exchanges offer, so a boost to 6/1 can simply bring it level with the rest of the market. What I check first is the best price elsewhere, because a boost measured only against the same bookmaker’s own number proves very little.

The headline is the bookmaker’s comparison, not yours.

Boosts usually appear on the sportsbook homepage, inside the event market or on the bet slip, with the old price struck through and the new one beside it. Sky Bet, for instance, labels its boosts and shows the previous odds crossed out above the enhanced price, and William Hill states that its Epic Boosts need no opt-in code.

The terms are where practice varies between operators, and there is no single industry standard to quote. Common conditions include a maximum stake, often small and sometimes set per customer; singles only, so the boosted leg cannot go into an acca; real-money stakes rather than free bet funds; and a short window tied to one race or match.

Read the settlement line carefully. Most boosts pay the whole return in cash at the enhanced odds, but some firms pay the enhancement portion as a free bet, and a free bet returns winnings only, without the stake, which makes that extra worth noticeably less than cash.

In Ireland, section 157 of the Gambling Regulation Act 2024 bars a licensee from offering an inducement to a specific person or group, and lets the Minister regulate or prohibit classes of inducement offered to the public. Citizens Information describes a ban on inducements as something that arrives once the Act is fully commenced, so treat a boost advertised to everyone and one sent to your account alone as different things under that law, and check the commencement position before assuming either rule is already live.

The table sets two common boosts against their standard prices on a €10 cash single, with returns including stake. The figures are illustrative arithmetic, not offers from any named bookmaker.

A price boost is most often mixed up with a free bet, and the difference is the stake. With a boost you risk your own money at a better price; with a free bet you risk none of your own, but a winning free bet returns winnings only, without the stake.

An acca boost is a separate thing again. It usually adds a percentage to the winnings of a multiple once it reaches a set number of legs, while a price boost lifts the odds of one named selection that the bookmaker picked. Some firms also let you choose a selection inside a boosted multiple, so the label on the offer matters less than the terms underneath it.

The test is the same for all three: compare the price with the best one available elsewhere.