Taxes & Remote Income
PESEL or NIP: which tax number do you actually need?
Employees use PESEL. The self-employed without one use NIP. Submitting the wrong one on a tax filing is a common, avoidable mistake — here's the actual rule.
Working remotely from Poland for a foreign employer: the tax trap nobody explains
If you become a Polish tax resident while still paid by a company abroad, both you and your employer can end up with tax obligations in Poland that neither of you expected.