Mourinho still had a busy first transfer window after returning to Stamford Bridge, with Andre Schurrle, Marco van Ginkel and Willian all commanding big fees.
But the Portuguese stopped short of pushing for the likes of Falcao and Cavani, who ended up at Ligue 1 sides Monaco and Paris Saint-Germain respectively, because the outlays would have jeopardised Chelsea's standing when it comes to UEFA's new rules on spending.
Mourinho's Chelsea are currently top of the Barclays Premier League and are still in the FA Cup and Champions League and, when asked if Financial Fair Play was the reason moves for Cavani and Falcao never got off the ground, he replied: "Correct
Because of transfer fees and salaries.
"Players are not just about transfer fees, but big wages
Of course there's a certain profile of player we don't go near."
Mourinho claimed to relish the challenge of the financial restraints, adding: "It's even better and even more enjoyable work, I think."
Chelsea have been synonymous with spending big on players since Roman Abramovich took over at the club more than a decade ago.
But now Mourinho is overseeing a change in philosophy, with over ?20million profit taken throughout January as the signings of Nemanja Matic and Mohamed Salah were offset with the sales of Kevin De Bruyne and Juan Mata.
Former Inter Milan and Real Madrid coach Mourinho praised the work done by his predecessors as he believes Chelsea will be in a strong position when financial restraints come into place that could see some of Europe's biggest sides fall foul and miss out on entering the Champions League.
"Chelsea made great investment in the past, and in some moments were also a bit criticised because we did so much," he added.
"But things change
Chelsea adapted well to the situation
When you see De Bruyne, who played three or four matches for Chelsea, gave us a big profit, there are other players who maybe don't play a single match for Chelsea and we will sell them at a profit.
"We had to organise ourselves in a different way
Before me, Chelsea did fantastic work in this level: (Romelu) Lukaku, De Bruyne, (Thibaut) Courtois, young (Thorgan) Hazard, Piazon
Not all of them will have a career at Chelsea, but all of them are important in this new financial organisation.
"So Chelsea worked very, very well and probably started doing that before other clubs
Because of that, even if Financial Fair Play comes into practice, I think Chelsea are advanced projecting that new situation and did very, very well
It was before me."
Source : PA
Source: PA