Life /
What is the cost of living per month for a single expat in Warsaw? [19]
In Warsaw the median salary id]s 4 something - that includes wages for the very young and people in very basic low-paid jobs. Remember someone on 4000 would not be well off at all, especially if they have a family to support. You wouldn't really find that many places to rent that are worth living in with a family and are easily commutable from for under 2000 - in fact thousands of people travel in from cheaper smaller towns and/or are overcrowded with not enough rooms (often someone has to sleep in the living room of their flat).
A lot of people depend on credit, have support from their families and/or have to live very carefully indeed.
For a single person like the OP, 4000 still wouldn't be great even if he tolerates a room in a shared flat or a long travel to work. 7500 (especially if net) is much better - that's just about comfortable but very far from well-off.
