#Humans: You're an adult once you've had about a years' worth of puberty; get a fucking job you lazy freeloader

[y-rhywbeth2]

Upon reaching the age of majority (15 years)

I knew I wasn't making it up! I admittedly saw that first in a different source that I still can't find, but there it is again: the age of majority in human society on Toril is 15 years old (or around). Welcome to adulthood; if you're of a traditional Calishite family you now have five years to get a decent job, get your own household, get married and give us grandchildren or you're a stain on the family's reputation.

This is presumably why Ulder was too comfortable kicking Wyll out (17 is totally a responsible adult! Never mind that jumping to conclusions and exiling him without hearing his side of the story would've been terrible at any age and is a reflection on Ulder's shitty personality problems...), why Karlach being hired as a body guard as (presumably) a teen isn't seen as overly weird, and 15-ish is also the age at which Sceleritas would announce his presence to Durge - time for your religious indoctrination, my liege!