Chelsea have spent £27m on Andre Schurrle and Marco van Ginkel this summer, but it will take at least another £50m to strengthen in all three positions and they have to bear Uefa's new rules over Financial Fair Play in mind.
Mourinho said: "No. The club is solid. The club is very well organised, the numbers are correct.
"We as a club want to follow the Financial Fair Play rules, but we are in a very stable situation.
"I like the squad, I like the profile. I like the fact we have a very young squad with three or four experienced players that are still in a fantastic moment of their career."