Chelsea are set to shell out up to £18m in add ons to sign Kai Havertz from Bayer Leverkusen.

Tha sum, on top of a £72m transfer fee, will make the midfielder their club-record signing to smash the £71m record they paid previously to sign Kepa Arrizabalaga.

The Blues' long pursuit of the Havertz looks to be coming to an end, with Sport Bild saying the transfer is about to be completed.

Leverkusen were previously reluctant to accept anything other than a straight £90m cash deal but have been persuaded to soften their stance.

The Bundesliga side will accept Chelsea’s offer and Havertz is expected to sign a five-year contract with the west Londoners, having allegedly already agreed personal terms with his proposed new club.

Chelsea have been strongly linked with a move for Kai Havertz
Kai Havertz is on the verge of joining Chelsea in a mega money transfer

The initial £72m fee will be supplemented by two £9m add-ons, the first of which Bayer are ‘almost certain’ to receive as it is based on Chelsea regularly qualifying for the Champions League and the knockout stages.

Payment of the second add-on will depend on Chelsea winning titles up to the expiration of Havertz’s initial contract in 2025, including the Premier League, the FA Cup and the Champions League.

The exact breakdown of the second clause is not yet known but winning the Champions League and Premier League will clearly take precidence over the FA Cup.

Lampard is getting closer to bringing Kai Havertz to Stamford Bridge
Lampard is getting closer to bringing Kai Havertz to Stamford Bridge

Sport Bild claim that Leverkusen want Havertz's exit done and dusted before they begin pre-season training on Friday.

The 21-year-old, who has scored 46 goals in 150 games for Leverkusen despite, has long been lauded as one of Germany’s brightest talents.

When Chelsea finally get the deal over the line, Blues boss Frank Lampard has already been told how he could get the best from the midfielder.

"I would say the No.8 position, inside right," Havertz said in an interview with Marca last November.

Get the latest transfer news straight into your inbox!

Want to be on the ball with all of the latest football news?

Well then sign up for the brilliant new Daily Star Sport email newsletter!

From the latest transfer news to the agenda-setting stories, get it all in your email inbox.

How do you sign up?

It only takes a matter of seconds.

Simply type your email address into the box at the top of this article and hit 'subscribe'.

And that's it, job done. You'll receive an email with all of the top news stories every single morning.

You can find out more information on our email newsletter on this link here.

"I'm not a classic No.10, but I like to have the ball at my feet, simply enjoying myself on the pitch.

"I've played in many other positions, but I prefer to play in the centre, where I have more of the ball. My dream will always be to wear the No.10 one day at my club.

"There are many players that inspired me like Kaka, Zidane, Ronaldinho... They've always been my idols.

"Between the Spanish players, my favourite is Andres Iniesta. He's outstanding on the ball. Unique. I like him the most."