Town boss Mick McCarthy says there will have to be players leaving his squad before he can make too many more additions.
So far the Blues have signed striker Joe Garner from Rangers for a £1 million, while Manchester City youngster Bersant Celina is expected to complete a season-long loan in the days to come.
Jordan Spence, who was on a short-term deal last season, has signed a two-year contract, while Cardiff have accepted an offer for Emyr Huws, who spent the second half of the last campaign at Portman Road.
McCarthy says he has other irons in the fire: "Oh yes, those have been ongoing for a long, long time and we’ll see what comes of them.”
The Blues manager says he and owner Marcus Evans, who appears to have loosened the purse strings this summer, are singing from the same hymn sheet.
"Yes, even if I wasn’t, I wouldn’t tell you,” he joked. "But we are with the signings that have made already and the ones that we’re trying to sign. We’re going to have to get some out, then hopefully we can freshen it up a little bit more.”
McCarthy says Evans remains as ambitious as ever: "Yes, we all want to get promoted, we all want to emulate Huddersfield or Blackpool from a few years ago or whoever else you want to name, Barnsley from years ago, that got promoted out of the blue. Everybody wants to be that team. But it’s going to be quite a lot of hard work.”
Is Evans backing him financially? "It’s at what level. We’ve already spent some money. But we’re going to have to lose some before we go around signing too many others.
"I’ve had words with a few of them and something may come of that and if it does then we might be able to change it around and get some other players in. If not, then we’ll be back with the same and trying to do our best.”
In May TWTD reported that striker Brett Pitman and midfielder Kevin Bru - who remained in France on the first day of pre-season training - have been told they can find clubs, but McCarthy wouldn’t confirm the identities of those he has told can move on: "I wouldn’t discuss that because they’re still our players.”
McCarthy wouldn’t be drawn on how many signings he hoped to make before the Blues travel to Ireland for the annual training camp at the Carton House Hotel in Co Kildare in a week’s time.
"I think I’ve told you before, somebody once asked me that question and I was thick enough or naive enough to give them a number. And now I’m neither of those things.”