Pardew is confident their transfer policy under owner Mike Ashley will see the club maintain their progress.
He told the Sunday Mirror: "From day one I've tried to be open and honest about the financial model we're operating. I understood the fans' initial resentment.
"Mike [Ashley] set out to make Newcastle self-financing and I knew exactly what that framework entailed when I took the job in December 2010. I've aimed to be transparent with the supporters and give them clarity about what we are trying to achieve and how we will operate in the transfer market.
"They know that in certain circumstances we will sell players.
"At a club like this, where huge money was spent in the past on top players such as Alan Shearer and Michael Owen, it was inevitable that some would not be happy with our spend. Many were unhappy with the sale of Andy Carroll - but that £35million has helped us build a team that has exceeded all expectations this season."