Blog — Taxes, B2B and Salaries in Poland
Practical guides on taxes for freelancers, B2B vs employment comparisons, IT salaries in Poland and everything you need to know about running a business in Poland.
Complete guides
Flat Tax 19% vs Lump Sum 12% for IT Contractors in Poland 2026
Detailed comparison of flat income tax (podatek liniowy) vs lump-sum tax (ryczałt) for software developers and IT freelancers in Poland. Calculations, examples, and which to choose.
B2B Contract vs Employment in Poland 2026 — Complete Guide
Everything you need to know about choosing between B2B self-employment and a regular employment contract (UoP) in Poland. Taxes, social security, benefits, legal risks.
All articles
Accounting Costs in Poland for Freelancers 2026 — How Much Does a Bookkeeper Cost?
Monthly accounting fees for Polish freelancers and sole proprietors in 2026. Compare traditional bookkeepers vs online platforms like inFakt, wFirma, and ifirma. Know what you're paying for.
B2B Contractor Rights in Poland — What You're Entitled To vs Employment
No sick pay, no severance, no paid holidays — but B2B contractors in Poland can set higher rates and negotiate better IP terms. Know your rights and risks before signing.
B2B in Poland — How to Handle Holidays and Sick Leave Without Employment Benefits
No paid holidays and no guaranteed sick pay on B2B in Poland. Learn how to price vacation time into your rate and manage sick leave risk with ZUS benefits and commercial insurance.
B2B vs Employment in Poland — A Decision Framework for IT Professionals
When does B2B make financial and practical sense in Poland vs a UoP employment contract? A structured decision framework, break-even analysis, and common mistakes for IT professionals.
NFZ Health Insurance for Freelancers in Poland 2026 — How It Works
How the NFZ health contribution (składka zdrowotna) works for self-employed in Poland in 2026. Costs by tax form, the changes since 2022, and whether private supplements like Medicover or LuxMed are worth it.
Poland Self-Employment Guide 2026 — From Registration to First Invoice
Step-by-step guide to registering a JDG (działalność gospodarcza) in Poland in 2026. CEIDG registration, costs, timeline, required documents, and what to do after registration.
JDG vs Sp. z o.o. vs Sp. k. in Poland — Which Company Type for IT Freelancers?
Compare sole proprietorship (JDG), limited liability company (sp. z o.o.), and limited partnership (sp. k.) for IT freelancers in Poland. Costs, liability, tax rates, and admin burden analyzed.
Remote Work Taxes in Poland for Foreigners 2026 — What You Must Know
Tax residency rules, the 183-day rule, double taxation treaties, withholding tax, and how to declare foreign income in Poland. Essential guide for EU expats and remote workers.
Senior Developer Income on B2B in Poland 2026 — Net vs Gross Analysis
Senior developer at 25,000 PLN/month on B2B in Poland — how much do you actually take home? Detailed breakdown for ryczałt 12% vs flat tax 19% vs employment at 20,000 PLN gross.
VAT Registration in Poland — When Freelancers Must Register and How
When are Polish freelancers required to register for VAT? The 200,000 PLN threshold, IT services rules, EU VAT MOSS, how to register, and when voluntary VAT registration makes financial sense.
How to Invoice Clients as a Freelancer in Poland 2026 — VAT, Templates & Deadlines
Step-by-step guide to issuing invoices in Poland as a self-employed contractor. What to include, VAT rules, foreign client invoicing, and free templates.
IP Box Tax Relief for Software Developers in Poland 2026 — 5% Tax Rate Explained
IP Box allows Polish software developers to pay just 5% income tax on qualifying IP income. How to qualify, calculate savings, and apply in 2026.
KSeF and Your Accountant — How to Grant Permissions and Organise Access
How does granting permissions in KSeF work for accounting offices and employees? A practical guide for Polish business owners working with external accountants.
KSeF and B2C, Proforma and Accounting Notes — What Is Not Issued Through the System?
Do B2C invoices, proforma invoices and accounting notes (nota księgowa) go through KSeF? Find out which documents are outside the mandatory Polish e-invoicing system.
KSeF Certificate — What Is It and When Do You Need It?
What is a KSeF certificate in Poland, when is it required and what role does it play in authentication and offline invoicing? Practical guide.
FA(3) in KSeF — What Is the New Logical Invoice Structure?
What is the FA(3) logical structure in KSeF, when does it apply and what does it mean for businesses and invoicing software? Guide for Polish taxpayers.
KSeF for Lump-Sum Taxpayers and VAT-Exempt Businesses in Poland
Does KSeF apply to Polish sole traders on lump-sum tax (ryczałt) or businesses exempt from VAT? Practical explanation for small businesses and freelancers.
KSeF Mandatory Dates in Poland 2026 — Who Must Use It and When?
Find out when KSeF becomes mandatory in Poland for sole traders, B2B contractors, VAT payers and VAT-exempt businesses. Updated timeline for 2026 and beyond.
KSeF Invoice Number in Payments — What Is It and When Is It Required?
What is the KSeF number in a payment, when does it matter and what should active VAT payers in Poland know? Practical guide for 2026.
KSeF Offline24, System Failure and Unavailability — How to Issue an Invoice Step by Step
How does KSeF offline24 mode work? What to do during system outages and unavailability? A practical guide for Polish business owners.
NFZ Public Health Insurance in Poland 2026 — What Expats and Freelancers Need to Know
How does Poland's public health insurance (NFZ) work? Who is covered, how much it costs for self-employed, what's included vs excluded, and whether you need private insurance too.
Poland Income Tax for Foreigners 2026 — Complete Expat Guide
How is income taxed in Poland for expats and foreign workers? Tax residency rules, PIT rates, double taxation treaties, and what changes when you go self-employed.
Poland Tax Rates 2026 — Complete Guide for Employees and Self-Employed
Poland tax rates 2026: 12% and 32% progressive, 19% flat tax, 8.5-12% lump sum. Which rate applies to you, thresholds, and how to minimize your tax burden.
Can a Foreigner Register a Business in Poland? Self-Employment Rules 2026
Who can register a sole proprietorship (JDG) in Poland? Rules for EU citizens, Ukrainians, non-EU expats, and digital nomads. Work permits, residency, and what happens on B2B.
Switching from Employment to B2B in Poland: Complete Checklist 2026
Step-by-step checklist for switching from employment to B2B in Poland. Calculate your break-even rate, negotiate the transition, register JDG, open bank account, understand ZUS timeline, and invoice your first month.
Getting a Mortgage as a Self-Employed Person in Poland — What Banks Require
How software developers and IT freelancers on B2B can get a mortgage in Poland. Bank requirements, income documentation, which banks are self-employment friendly in 2026.
B2B with One Client in Poland: Is It Legal? Tax Risks Explained
Explaining 'hidden employment' (ukryte zatrudnienie) risk for B2B contractors working with a single client in Poland. ZUS rules, safe practices, and when to get a second client.
How to Invoice as a B2B Contractor in Poland: Step-by-Step Guide
Required elements of a Polish Faktura VAT, VAT rates, invoicing software options (inFakt, Fakturownia, wFirma), payment terms, EUR vs PLN invoicing, and what to do if the client doesn't pay.
Net Salary Poland 2026: How Much Do You Take Home?
How Polish payroll deductions work. Comparison tables at 5K, 8K, 10K, 15K, 20K PLN gross. B2B equivalent rates. Use the calculator to see your exact take-home pay.
Freelancing as a Developer in Poland 2026: Everything You Need to Know
Complete guide to setting up freelance IT work in Poland. How to register a JDG sole proprietorship, ZUS registration, business bank account, VAT, invoicing, and recommended accounting tools.
B2B Tax Rates in Poland 2026: Flat Tax, Ryczałt, or General Rules?
Plain-English explanation of all three B2B tax options in Poland: progressive scale (12%/32%), flat tax 19% (liniowy), and lump-sum ryczałt (8.5–15%). Which is best for IT contractors?
IT Salaries in Poland 2026: Developer Pay by Technology and Experience
Current IT salary data for Poland 2026 by role, technology stack, and city. Java, Python, React, .NET rates for junior, mid, and senior developers. B2B vs employment comparison.
VAT for Polish Freelancers with Foreign Clients — Complete Guide 2026
How to handle VAT when billing EU and non-EU clients from Poland. Reverse charge, 0% VAT export, VAT-EU registration, invoice requirements. For IT freelancers.
B2B vs Employment Contract in Poland 2026: Complete IT Professional Guide
Detailed comparison of B2B self-employment vs employment contract (UoP) in Poland for IT professionals. Tax rates, ZUS costs, net income tables at 10K–20K PLN, and who benefits most.
IP Box Tax Relief for Software Developers in Poland — 5% Tax Rate Guide
Complete guide to the IP Box intellectual property relief for Polish software developers. Who qualifies, how to keep records, how to apply the 5% rate instead of 19%.
IT Salaries in Poland 2026 — B2B Rates and Employment Wages by Role
Current salary data for software developers, DevOps, QA, PM and other IT professionals in Poland 2026. B2B hourly rates, employment gross, city comparison.
How the B2B Calculator Works — Methodology Explained
Step-by-step explanation of how the B2B salary calculator computes net take-home pay from gross revenue. Formulas, tax rates, ZUS contributions for Poland 2026.
ZUS Social Security Contributions for Self-Employed in Poland 2026
Complete guide to ZUS contributions for sole proprietors (JDG) in Poland 2026. Start relief, small ZUS, full ZUS, Small ZUS Plus — when and how much you pay.
Calculate your B2B or employment take-home pay
Free calculator — current 2026 rates, results in seconds.
Open B2B vs Employment Calculator