This site can be used offline - everything is packed inside this HTML file, so you just need to download it and open in browser (preferably Chrome)

Link to the source code: https://github.com/Meosit/poland-taxes-calculator

This calculator is for informational purposes only, it can and will contain errors depending on real cases which cannot be predicted. Yearly tax declaration is not supported, this is just month-by-month taxes and their month-by-month fluctuations according to the sources i found in web and my personal understanding. The idea of this calculator is to UNDERSTAND what is actually written in your payslip. In best case scenario you should have a fully retrospective setup and the data should match with our payslip with a little error of up to 0.05 zł. In case something is not supported by this calculator you have a flexible 'Deductions/Compensations' configuration which should cover most non-trivial cases.

What it takes into account:

• Start and end of the employment
• Food vouchers calculation with tax compensations (customizable)
• Yearly and Quarterly Bonuses (customizable)
• Salary Updates
• Occasional Bonuses (Compensations) and Deductions (customizable)
• Young people tax reduce (under 26 years old)
• Official Sick Leaves
• Creative Work Tax Reduce (definitely will be errors here, but setting can give high level expectations)
• "Polski Ład" changes starting from 2022
• "Polski Ład 2.0" changes starting from July 2022 (might be errors here)
• Shared with wife/husband yearly tax declaration (but note that this is related only to month-by-month taxes, not the actual tax declaration)

What it does not take into account:

• YEARLY TAX DECLARATION - THIS IS COMPLETELY DIFFERENT TOPIC
• Business Trip Expenses
• There might be errors in holidays due to generic algorithm (actual holiday shifts might be different)