If you're new to betting on this iconic race, let's run through some examples of how the Prix de l'Arc de Triomphe betting odds work in practice.
Let's say a leading three-year-old contender is the pre-race favourite in the ante-post market at odds of 5/1. If you backed the horse to win for £10, you'd win £50 in profit, plus your stake back.
Now let's say you fancy an outsider each-way at odds of 16/1. If you backed the horse at £10 each-way and it finishes in the top three, you'll be paid at a fifth of the odds for the place portion of your bet. This would earn you a return of £32, plus your stake back on the place element. The Arc is a race where outsiders can shock, with 2025 winner Daryz landing the race at 12-1 in the Aga Khan colours under Mickael Barzalona.
Recent renewals show that the Arc rewards punters who follow form across the major prep races such as the Prix Vermeille, the Prix Foy, the Prix Niel and the Irish Champion Stakes. These three Group 1 contests, all held in the weeks leading up to the Arc, tend to surface the leading contenders ahead of the first Sunday in October.