Polish entrepreneurs need to understand deductible business expenses to minimize tax liabilities and maximize profits in 2026.
What are Deductible Business Expenses?
According to Article 22 of the Polish Personal Income Tax Act, deductible expenses are those incurred to generate revenue or to protect its source. However, Article 23 lists expenses that *cannot* be deducted. This means the law provides a general definition requiring individual assessment of each expense.
Key Criteria: Connection to Revenue
A deductible expense must have a real connection to running the business or the potential to generate income. This criterion provides flexibility but demands thorough justification in company documentation.
Judicial Precedent and Expense Rationality
Administrative courts consistently emphasize the need for a causal link between an expense and revenue, which can be direct or indirect. Courts also assess expenses based on the time they were incurred, not necessarily their eventual outcome. A rational and justified expense can be deductible even if it doesn’t yield the expected economic effect.
Deductible Costs – Examples for 2026
Deductible expenses for sole proprietorships include costs incurred to generate revenue or maintain its source, supported by documentation like VAT invoices, receipts, or bank transfers. These expenses can also impact VAT deductions for VAT-registered businesses.
Business Costs – Specific Examples
Examples include the purchase of goods for resale, rent and utilities (proportional to business use), home office expenses (with justifiable proportions), equipment and software (up to 10,000 PLN or subject to depreciation), KSeF implementation costs, external services (accounting, legal), education and development, marketing, vehicle expenses (with mileage logs), payroll and contractor fees, insurance, depreciation, bicycle purchases for business use, business travel, digital content creation equipment, company uniforms, and office furnishings.
Non-Deductible Expenses
According to Article 23 of the PIT Act, certain expenses are explicitly non-deductible, regardless of their connection to the business. These are expenses the legislator has specifically excluded.
Common Errors in Expense Reporting
Common mistakes include claiming personal expenses, lacking documentation, incorrectly calculating representation costs, and failing to provide adequate business justification for expenses.
Individual Interpretations for Security
When in doubt about the deductibility of an expense, obtaining an individual interpretation from the tax authorities is the safest approach. This allows for documented justification and minimizes the risk of future tax adjustments.
Summary
Deductible business expenses are a flexible tool for tax management, not a fixed list. Business justification, expense rationality, and individual assessment are crucial. Conscious expense management can lead to significant tax savings.
