The Straits Times on 30 June 26 reported that in 2025, 13.4% or 1 out of 7 resident households have a monthly income of $30,000 or more.
Having a 1 in 7 chance that you are living in a household earning more than $30k a month is not super common, but at the same time not super rare as well.
Just posting this info here for my reference.