Everton do not have the "financial conditions" to sign players in the January transfer window, according to Marco Silva.
The Toffees are 10th in the Premier League having responded to back-to-back defeats to Brighton and Hove Albion and Leicester City with a 2-0 home victory over Bournemouth.
Reports suggest their forward line is set to be depleted with Oumar Niasse said to be nearing a loan move to Cardiff City.
But they may not be able replace the forward, with boss Silva telling reporters: "When you asked me the last few weeks the possible players coming or not in the market, I told you that you just can't sign someone if someone leaves the club or we sell someone.