He was loaned back to Genk, and then loaned to German club Werder Bremen this season where he has been impressing.
As you might expect he would have done, after all he is a full Belgian international, who his coach has even preferred on occasion to Chelsea's £32 million man Eden Hazard.
21-year-old De Bruyne is in a similar position to Romelu Lukaku; he wants to play first team football and not go back to sit on the bench, except he has said he would be open to staying in Germany with Bremen if the two clubs agreed on such a deal.
However with Chelsea spending £6.7 million on him, they are not likely to let him go cheap if at all, so Bremen would have to come up with a tempting offer.
And that's the problem.
Werder Bremen have just unveiled their latest set of financial figures, which have revealed a third consecutive loss, this time of 8 million Euros.
Last year the club posted a 13.9 million Euros loss, so while a decrease, the figures are hardly the healthy ones of a 'booming Bundesliga' club.
Werder have announced continuing 'austerity measures', with chairman Wilfried Lemke stating: "The board and management agree that the consolidation must be continued in the upcoming season."
Manager Klaus Filbry countered however, telling Bild the club would continue to invest in the team.
Whether that is on the scale of signing Kevin de Bruyne is another matter. The most expensive signing Werder made last season was 5 million Euros.
The season before that their top signing cost 4.4 million Euros and in 2010/11 their top deal was for 6.6 million Euros.
Werder are not big spenders, and with Chelsea likely to try to resist any offers for De Bruyne by setting his asking price high, don't expect Werder to buck their recent trend and make an offer of eight-figures.
Do you hope to see De Bruyne back at Chelsea next season?
image: © mikehamm