The same proportion said job candidates should be informed of salary ranges for positions before attending interviews.
More than three-fifths of those surveyed, or 62 percent, said they know how much some of their colleagues earn.
CBOS said this awareness varies depending on workplace size, with employees in smaller organisations significantly more likely to know their co-workers’ salaries than those in larger businesses.
The poll also found strong support for broader pay transparency measures.
About 64 percent of respondents said employees should have the right to request written information on average pay levels for comparable roles, broken down by gender.
Meanwhile, 66 percent said employers should not be allowed to prohibit workers from sharing information about their earnings.
A majority of respondents, 58 percent, said employers should not have the right to ask job candidates about their previous salaries.
The findings come after Poland partially implemented an EU directive on pay transparency, state news agency PAP reported.
The new rules, in effect since December, require employers to include salary ranges in job postings and inform candidates about pay policies, while banning requests for information about a candidate’s current earnings.
At the same time, employers cannot prohibit employees from disclosing their salaries, and confidentiality clauses in this area are not permitted, CBOS said.
The survey was carried out from March 5 to 15 on a sample of 1,012 respondents.
(gs)