The Whites centre back supposes his time is up at Stamford Bridge, not that it really ever started in the first place.
Since the Czech Republic international joined in 2010 for a reported £5.2 million, he has played just twice in a blue shirt and became part of the almighty Chelsea exodus of loan players farmed to all four corners.
The 23-year-old is one of 38 on contract with the Premier League leaders, but currently playing elsewhere, one of whom is Whites team-mate Lucas Piazon.
It doesn't even help the legend that is John Terry nears the end of his career and maybe offers Kalas a glimmer of hope.
The Whites player said: "Chelsea are trying to build a big team; there’s nothing wrong in that. We loan players are trying to get into the first team, but it’s very difficult.
"John Terry can’t keep going forever: that’s obvious. But there is another player they can buy and build a team from there."
Kalas's contract is up in the summer of 2018, but Blues know if they are to get something back on their investment, it's sell him next summer or watch his contract wind down.
"When you go on loan you want to play. At the end of the season, I’ve only got one more year left on my contract," he added.
"So I’m playing for more than just building a CV."
His chances of a permanent deal at Whites have been enhanced by five straight appearances since he recovered from a hamstring injury, as well as being part of a defensive line that kept a magnificent clean sheet in the 5-0 thumping of Reading on Saturday.