After struggling early in the season, Cardiff have steadily moved up the table following Warnock’s appointment.
“We need a few more goals, we need a few more options off the bench,” Warnock told BBC Radio Wales.
“It’s going to be a massive achievement for everybody at the club if we can get up there near the play-offs next season with the budget we’ve got and the amount we’re going to spend.”
Warnock’s has previously said the Bluebirds would not need big money to launch a promotion bid next season.
After bringing several players on his arrival at the club in October, including Kieran Richardson and Marouane Chamakh, the Bluebirds only signed Greg Halford from Rotherham on a permanent deal in January, while goalkeeper Allan McGregor joined on loan from Hull City.
“I haven’t spent any money yet because I didn’t want to throw it away stupidly in January,” he added.
“We’ve had to bit our tongues really and be a little bit frustrated, but if we get some quality in and get a bit more choice off the bench, that’s what our objective is.”