The Irish betting firm closed its book after seeing a surge of wagers on Hayward's imminent departure over the last few days. It believes he is now certain to quit BP before the end of December, even if the company is successful in permanently capping the oil leak in the Gulf of Mexico.
"The punters have spoken," said Ken Robertson, communications manager for Paddy Power. "The betting has been one way since we opened this book in May. Over the weekend, there was a constant flow as people looked to back Hayward's departure."
Paddy Power started offering odds of 2-1 that Hayward would vacate the chief executive's seat by 31 December. By early June, the odds had been cut to 5-6, and Paddy Power decided to pay out after still finding interest at the miserly odds of 1-5.
More than 500 bets were placed on Hayward leaving, at a cost to Paddy Power of £10,055.