Both things are true at once, and holding them together is the single most useful thing on this page.
The favourite wins 35% of races. Backing every favourite, level stakes, across 30,221 races has returned -9.03%. It is the best-performing straightforward way of betting we have tested, and it still loses.
The reason is not that the favourite is a bad horse or that the price is wrong. It is that winning a third of the time is worth a certain amount of money, and the price you are paid is slightly less than that amount. Every time.
Put it in pennies. For every £100 staked on favourites in our sample, £90.97 came back. You lose about 9.0p in the pound. Not dramatic, not a swindle, and absolutely relentless.

