The 25-year-old Spain striker has long been linked with a move to Stamford Bridge, and the switch has now been confirmed by the Blues.Chelsea has agreed to a deal to sign Diego Costa from Atletico Madrid after meeting the Spain international's buyout clause, the Premier League club has confirmed.
Chelsea will pay around 44 million euros for the striker, although a significant portion of the transfer fee includes fees paid to agents.
The Brazil-born Spain international will also triple his wages at Stamford Bridge, with Chelsea set to hand the 25-year-old a five-year contract worth 194,000 euros a week.
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The move has long been discussed, with Costa confirming the pending agreement to Goal in June: "Why would I have chosen to play for Chelsea? It is a thing that is about to happen. Things are going in a direction and, if they keep going as they are going, it is the team I will play for in the next season.
"I've wanted to play in the Premier League for a while. Chelsea are one of the greatest clubs of the world so there are many factors that make you take a decision like this."