Real Madrid and Ajax have officially confirmed they have reached an agreement over the transfer of forward Klaas-Jan Huntelaar. The 25-year-old is going to cost the Bernabeu club €20 million up front, with the total fee potentially rising to €27m with additional clauses based on appearances and his levels of success with Los Blancos included in the deal.

The transfer will take place subject to Huntelaar agreeing personal terms and passing a medical, with Madrid set to sign the striker on a four-and-a-half-year contract, running until the summer of 2013.

If everything goes as planned, the player will join Madrid on January 2.

Huntelaar, who will be eligible to play in the Champions League having only played in the Uefa Cup with Ajax this year, has earned former club Heerenveen €2.5m as part of a sell-on clause they held from his sale to the Amsterdan giants in 2005.

Madrid’s official statement read: "Huntelaar is the new Real Madrid player. Real Madrid and Ajax Amsterdam have reached an agreement for the forward.

"As usual, the deal is dependent on the player passing a medical and the signing of his contract with Real Madrid.

"Klaas Jan Huntelaar will be tied to Real Madrid until June 30, 2013."

Los Merengues have acted in the transfer market after a season-ending injury to Ruud van Nistelrooy left them short on striking options, with another signing expected to be announced for the January transfer window.

Huntelaar scored a superb 75 goals in 90 league games and a total of 100 strikes in 120 appearances in all competitions for Ajax, following up from a successful spell with Heerenveen where he netted 34 league goals in 46 matches.

The prolific striker also has 18 international caps for the Netherlands and has already scored 10 times for his country.