title ^
Baltimore - US: 100k annual
It varies ofc where you live. If you live in a big city from north italy I imagine you'd need around 30k/40k if you have the house and all, you live alone and aren't trying to save too much.
If you live in southern Italy (or islands Sicily and Sardinia, where I live) probably you can do the same with 20/30k, still assuming that you won't save much from what you earn.
Also it varies a lot wether the place you live is rural or you live in the city centre, especially if it's a big city.
TLDR: 30/40K I guess