There is no official age limit to be called for a kpop audition.
However, idols usually go through the following steps:
- become trainee before 16yo
- train for some years
- debut around their 16~22yo range
Therefore, if you are around 16~19yo region, then you are a little late.
However, if you have an incredible talent and an outstanding shining star upon you, then you've might have a chance. This is very rare to happen, but a few exceptions are:
Irene (Red Velvet)
She became a trainee at 18yo in 2009, just after her high school. Trained for 5 years under SM Entertainment and debuted in 2014 at 23yo.
She became a trainee under RBW Entertainment in 2011 at 20yo, trained for 3 years and debuted at 23yo.
She joined GWSN in 2018 and debuted after 4 months at 25yo.
On the other side, agencies have no problem to take on trainees under 10:
- JYPe Twice’s Jihyo (born in 1997) trained for 10 years before her debut with Twice, in 2015. This means she entered JYPe in 2005, when she was just 8-years-old!
- JYPe Stray Kids Chan (born 1997) trained for 7 years before his debut with SKiz, in 2018. He entered the agency in 2010, he was only 13-years-old.