Work /
Does it make sense to move from the UK to Wroclaw for this salary? [50]
7500 brutto less 18% tax is 6150 nett. As an English teacher in my third year here, I take home about 4000zl a month, including private lessons. I have a nice flat in the Old Town for which I pay 1200 a month and rent a room to a student for 500. I eat well because both of us cook and we usually eat at home, but on my salary I can go to restaurants, cinemas, etc occasionally. I spend too much money at my favorite pub but that's because it's like my living room and I meet my friends there. That's my choice.
Except for rent, I don't think Poland is inexpensive. I'm from the US. Let's say I made the same amount per month in US dollars. Then I'd think Poland was cheap, but since I'm paid in zlotys I have to think in terms of how long it takes me to earn the price of a beer or anything else. Still, I earn more than most of my Polish friends. I think you'll be fine on that salary. My Polish friends would think you're rich.
Not to rain on your parade, but I doubt that you'll be fluent after a year, especially if you'll use English at work. It probably will take a little longer and it'll require a lot of hard work on your part, but you can do it if you're really determined.
Good luck. Enjoy the experience.