If something is under $15 and you buy it for me, I will do the same for you next time. This is called trust and this is called reciprocity
Like many women in their 30s, one of my true joys is meeting a friend for a beverage. However, after catching up for a green juice (healthy) with a dear colleague recently, I was on the train home when I got a message saying “Hey! Can you please transfer me $12.50? Thank you!” My response can only be described as … horrified.
The reason that it stuck in my craw is because I firmly believe that you should not request repayment for anything under $15. If we are out together and I shout you a coffee I would rather commit seppuku than be bank-transferred $4.50 ($6 if you are in the CBD, $9 if you are a matcha observant). For context, A$15 is roughly US$10, £8, €9, NZ$19 and 1,680 yen. In this (scary) global economy, that doesn’t stretch much further than a small beverage/snack/Boots meal deal.