When things happen in Polish business
ZUS payments, tax declarations, and annual filings. Organized by time of year.
Running a sole proprietorship in Poland means operating on a calendar defined by deadlines. ZUS contributions are due monthly. Income tax is paid in advance. Annual declarations fall in spring. Missing these dates carries penalties. This guide maps the year so you know what is coming and when.
All dates below reflect current regulations from ZUS and the Polish Tax Authority. Verify current deadlines directly with those sources, as dates occasionally shift due to weekends or regulatory changes.
January - March
Annual tax declaration (PIT)
The deadline for submitting your annual PIT declaration is April 30th for most tax forms. January through March is the period to gather your income documentation, issued invoices, and any deductible costs. For ryczałt taxpayers, the relevant form is PIT-28.
Monthly ZUS payments
ZUS contributions are due by the 20th of each month for the previous month. For sole proprietors without employees, this means paying by the 20th for the preceding period. Setting up a standing order from your business account reduces the risk of missing this.
Updated contribution thresholds
ZUS contribution bases often change at the start of the year when the national minimum wage adjusts. Check the ZUS website in January to confirm the current base for preferential contributions if you are in your first two years of operation.
April - June
PIT submission deadline
April 30th is the primary deadline for annual income tax declarations. For ryczałt, PIT-28 must be submitted. For progressive scale taxpayers, it is PIT-36. For flat tax, PIT-36L. Submit electronically via e-Urząd Skarbowy to receive immediate confirmation.
VAT quarterly settlement
If you are a VAT payer choosing quarterly settlement, Q1 is settled by April 25th. The JPK_V7 file must be submitted electronically. Small taxpayers (małe podatniki) may use the quarterly method if their annual turnover does not exceed the threshold defined in the VAT Act.
July - September
Mid-year income review
By mid-year you have enough data to compare your actual income against your advance income tax payments. If your advance payments are insufficient, you may face an underpayment penalty at year end. Reviewing this at six months gives time to adjust.
VAT Q2 settlement
Quarterly VAT payers settle Q2 by July 25th. Monthly payers continue their monthly JPK_V7 submissions throughout this period. Ensure your faktura numbering sequence is unbroken and your records are current.
Ulga na start review
If you registered your business in January or February, your six-month ulga na start period ends around June or July. After this period, you transition to preferential ZUS contributions. The transition is not automatic in all cases. Check your ZUS status proactively.
October - December
Tax form change window
You can change your income tax form for the following year by submitting a declaration in January of that year, but preparation happens in Q4. Assess whether ryczałt, skala podatkowa, or podatek liniowy suits your projected income for the coming year.
Invoice archive review
Polish law requires keeping tax records for five years from the end of the tax year. Q4 is a natural point to organize your invoice archive, ensure backup copies exist, and confirm your records match your ZUS and tax declarations for the current year.
VAT Q3 and year-end preparation
Q3 VAT settlement is due October 25th. December is the time to review outstanding receivables, consider prepaying costs that are deductible this year, and confirm your annual income projection to minimize surprises when the April deadline arrives.
The Polish tax calendar is predictable. The deadlines do not surprise you. What surprises people is not knowing the deadlines exist.
From the Seasonal Guides section, Noxihe
Ryczałt rates and deadlines
Ryczałt: the annual rhythm
Ryczałt taxpayers operate on a slightly different calendar. Monthly ryczałt payments are due by the 20th of the following month. Annual PIT-28 declaration is due February 28th (or the last day of February) for the previous year, earlier than the April 30th deadline for other tax forms.
The ryczałt ewidencja przychodów (revenue ledger) must be maintained throughout the year. It records each invoice issued, the applicable rate, and the calculated tax. This record is the foundation of your annual declaration and must be retained for five years.
For foreigners new to ryczałt, the key point is that you pay tax on every zloty of revenue regardless of your costs. A month where you have high software licensing expenses but normal client income still results in a full tax payment on the gross revenue.