It's difficult to compare salaries from place to place even by using currency conversions as costs of living vary. So even if the salary is lower, if the cost of living is lower too, it might be worth considering. Have a look at our Cost of Living in Poland page. There's a table at the bottom with average prices of day-to-day goods like milk and bread, and other monthly costs such as rent and internet. You can also do a search on websites like Expatistan and Numbeo to compare costs of living between your own city and Warsaw. Another resource is Mercer's Cost of Living survey for 2016, which ranks dozens of cities worldwide according to how high the cost of living in each particular city is. This can also be useful in comparing costs and can be found by Googling.