His good form from the previous week did not help him, however, at the 2012 World Championship where he was upset by fellow countryman, Richie Burnett, 2–3. Webster had a dart at double top in the deciding set to win the match, but missed and was the highest seed to exit in the first round of the event. He then teamed up with Burnett for his second World Cup and together they reached the semi-finals with wins over Croatia and South Africa. Webster could not reach his second successive World Cup final however, as the English pair of Phil Taylor and Adrian Lewis won 1–3. At the World Matchplay, Webster defeated Colin Lloyd 10–6 in the first round, before losing to Andy Hamilton 6–13 in the last 16. In September, Webster threw a nine darter in the opening leg of his first round match against Andree Welge in Event 4 of the European Tour, but went on to lose 4–6. After all 33 ProTour events of 2012 had been played, Webster was 27th on the Order of Merit, inside the top 32 who qualified for the Players Championship Finals. He lost to Taylor 2–6 in the first round.