The coach admits the Ligue 1 champion is being scuppered in the transfer market by the regulations after the club agreed a deal to sign Serge Aurier on loan.
That did not stop PSG splashing out 50 million euros on David Luiz, however, while Real Madrid's Angel Di Maria has also been linked with a move to the French side.
Blanc, however, insists his side - which completed the signing of Serge Aurier this week - is sticking to the guidelines.
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"We do not do what we want, you know as well as me. If you are told that this is the formula, it is there for a reason," Blanc said. "Financial fair play will bother us, we have already felt the discomfort but it did not prevent us from recruiting two key players, Serge Aurier and David Luiz.
"But it is true that we cannot do what we want, we knew that."
Aurier was signed on an initial loan deal from Toulouse, with PSG retaining an option to buy the Cote d'Ivoire international on a permanent deal in future.
Blanc admits he is delighted to have acquired the 21-year-old in a deal which will do little to incur further problems with FFP.
"It gives us pleasure, we have the opportunity to bring him to Paris so we are very happy to have him with us," he said. "He is a young boy with a great potential and good margin for progression.
"I hope that he will grow and become an important element for the future of the club."