BOG Is Free Insurance — But Only If You Know How to Use It
There’s one promotion in UK horse racing that genuinely shifts the odds in the bettor’s favour, and most people treat it as an afterthought. Best Odds Guaranteed — BOG — is the policy where a bookmaker pays you at whichever price is higher: the odds you took when you placed your bet, or the starting price when the race goes off. bet365 alone paid out more than 50 million pounds in BOG adjustments during the Cheltenham Festival in 2026. That’s 50 million in additional winnings that bettors received purely because they’d placed their bets early and the starting price drifted higher.
I think of BOG as a one-way valve. It protects you when the odds move against your initial assessment (meaning the horse drifts, suggesting the market thinks it’s less likely to win — and the starting price pays more), while locking in your original price if the horse shortens (the market thinks it’s more likely to win, pulling the starting price below what you paid). You can’t lose from the price movement. You either collect at your bet price or at a higher one.
And yet I regularly meet bettors who place their bets ten minutes before the off, after the market has already settled, gaining nothing from BOG. The entire value of the promotion depends on timing.
How Best Odds Guaranteed Works: Morning Price vs Starting Price
The mechanics are simple. You place a bet on a horse racing market — typically from the morning when the bookmaker first prices up the race, or any time before the off. At the moment you place your bet, you’re locked in at a specific price. When the race starts, the starting price (SP) is declared. BOG compares your bet price with the SP and pays whichever is higher.
Example: you back a horse at 8/1 at 10am. By the time the race goes off at 3.15pm, the horse has attracted support and the SP is 5/1. You still get paid at 8/1 because your bet price was higher. Conversely, if the horse has drifted and the SP is 12/1, BOG kicks in and you’re paid at 12/1 instead of the 8/1 you originally took. Your 10-pound bet returns 130 rather than 90. That’s a 40-pound uplift for doing nothing other than placing your bet early.
BOG typically applies to UK and Irish horse racing only — not international races, not greyhounds, and usually not ante-post markets where there is no official starting price. The promotion generally applies to win and each-way bets placed at fixed odds, not to SP bets (where you’ve chosen to take whatever the starting price turns out to be, which obviously renders BOG meaningless).
The critical point is that BOG has asymmetric value. It matters most when horses drift — when the starting price is higher than the morning price. Horses drift for many reasons: negative market intelligence, a change in going, withdrawal of a fancied rival changing the race dynamics. Every one of those drifts becomes a bonus for the early bettor under BOG.
Maximising BOG Value: Timing, Markets, and Bet Types
The single most impactful thing you can do with BOG is bet early. The wider the gap between your bet time and the race time, the more opportunity exists for the starting price to move above your locked-in price. I typically place my BOG-eligible bets between 9am and 11am on race day, when the morning markets have settled into their initial shape but before the serious money from professional punters and exchange traders starts moving prices.
Which races offer the most BOG value? Large-field handicaps, especially on feature days. These races attract the most volatile price movements. A horse might open at 14/1 in the morning and drift to 20/1 by the off as the market reassesses the form, or shorten to 8/1 if a well-known tipster puts it up. Online real event betting GGY rose 5% year on year in the final quarter of 2024/25, partly driven by competitive Cheltenham results — and it’s at these high-profile meetings where BOG delivers its biggest payouts, because the morning-to-SP price movements are at their most extreme.
The synergy between BOG and value betting is direct. If your form analysis identifies a horse whose true odds are shorter than the bookmaker’s morning price, BOG adds a free option on top: you’ve already secured a value price, and if the SP drifts further, your value position improves without any additional cost or risk.
One practical habit I’ve developed is checking whether all my regular bookmaker accounts are offering BOG on a given day. Most major UK bookmakers run BOG as a near-permanent promotion, but some restrict it on specific race days or cap the maximum free bet enhancement. A two-minute check in the morning ensures you’re placing your bets with the bookmaker offering the cleanest BOG terms.
BOG Limitations: What the Terms and Conditions Don’t Highlight
BOG is excellent, but it’s not unlimited free money, and the small print matters.
Most bookmakers exclude ante-post bets from BOG. If you’ve backed a horse six weeks before the Cheltenham Gold Cup, that bet typically won’t qualify for a BOG uplift on race day — you’re locked into the ante-post price you took. This creates a genuine strategic trade-off between the better ante-post odds available weeks in advance and the BOG protection available on race day.
Some bookmakers cap the BOG enhancement. If you backed a horse at 8/1 and the SP drifts to 33/1, the bookmaker might pay you at the BOG-capped price of 20/1 rather than the full SP. These caps vary by operator and are sometimes adjusted for specific meetings. Reading the terms for each promotion isn’t glamorous, but a capped BOG is materially less valuable than an uncapped one.
BOG sometimes doesn’t apply to enhanced or boosted prices. If you’ve taken a bookmaker’s daily price boost on a horse — say 5/1 enhanced to 7/1 — BOG may not apply to the enhanced element. You might get BOG on the underlying 5/1 price but not on the boosted 7/1. The exact treatment varies, and it’s worth checking before you place the bet.
Finally, BOG is only as useful as the bet it’s attached to. Taking a terrible price on a horse with no form just because you want BOG exposure is backwards. The promotion enhances good bets — it doesn’t create them. Start with sound form analysis, identify genuine selections, place your bets early in the morning, and let BOG do its work as a free bonus on positions you’d have taken anyway.
