B2B Contract in Poland: Complete JDG Guide for Freelancers

JDG vs Sp. z o.o. (Limited Liability Company)

The alternative to JDG is registering a sp. z o.o. (spolka z ograniczona odpowiedzialnoscia) -- a limited liability company. While sp. z o.o. provides liability protection and can look more professional for client-facing businesses, it comes with significantly more overhead: 5,000 PLN minimum share capital, mandatory bookkeeping, corporate income tax (CIT) at 9% or 19%, and then personal income tax on dividends (19%) -- resulting in effective double taxation.

For a single person doing B2B contract work, JDG is almost always the better choice. The administrative burden is lower, the tax options are more favorable, and the setup is free and fast. You would only consider sp. z o.o. if you need liability protection (e.g., high-risk consulting), plan to take on partners, or want to build a company that exists independently from you.

Who Can Register a JDG?

Polish citizens can register without restrictions. EU/EEA citizens have the same right as Polish citizens -- no additional requirements. Non-EU citizens can register a JDG if they hold a valid residence card (karta pobytu) with the right to work, a temporary residence permit, permanent residence, long-term EU residence, or refugee status. If you are in Poland on a work visa or temporary residence permit, check that your permit allows self-employment.

You will also need a PESEL number (Polish personal identification number). If you do not have one yet, see our guide to getting a PESEL.

How to Register Online (Recommended)

• Step 1: Get a Profil Zaufany (Trusted Profile). This is Poland's electronic identity system. You can set it up through your Polish bank's online banking portal (most major banks support this), at a government office, or via the e-dowod (electronic ID card). This is required for online registration.
• Step 2: Go to biznes.gov.pl. Navigate to the CEIDG section and click "Register a business" (Zarejestruj dzialalnosc). The form is available in Polish, but browser translation tools work reasonably well.
• Step 3: Fill in your personal details. Name, PESEL, address, contact information. Your registered business address can be your home address -- there is no requirement for a separate office.
• Step 4: Choose your PKD codes. PKD (Polska Klasyfikacja Dzialalnosci) codes describe your business activities. For IT consulting, the most common code is 62.02.Z (IT consultancy). You can list multiple codes. Your primary code should match your main activity, as it affects which ryczalt tax rate applies.
• Step 5: Choose your tax form. You will select your preferred taxation method during registration (see the Tax Options section below). You can change this at the start of the following year.
• Step 6: Choose your ZUS registration date. You can start your business immediately or set a future date. Your ZUS obligations begin on the date your business becomes active.
• Step 7: Submit. The registration is processed within 1 business day. You will receive your NIP (tax ID) and REGON (statistical number) automatically. Your business is now officially registered.

Alternative: Register in Person

If you prefer face-to-face assistance, you can register at any urzad gminy (municipal office) or urzad miasta (city office). Bring your passport or ID card, your PESEL confirmation, and your chosen PKD codes. The staff will help you fill out the CEIDG-1 form. This is particularly useful if your Polish is limited and you want guidance through the process.

ZUS Phases: From Zero to Full Contributions

The Ulga na Start (startup relief) exempts you from social insurance contributions (emerytalna, rentowa, wypadkowa) for the first 6 months. You only pay the health insurance contribution (skladka zdrowotna), which depends on your chosen tax form and income. For most B2B contractors, this amounts to roughly 400-450 PLN per month.

After 6 months, you move to preferential ZUS (Maly ZUS) for 24 months. Your social insurance base is calculated at 30% of the minimum wage rather than the standard 60% of the forecasted average salary. This roughly halves your social contributions compared to the full rate.

After 30 months total (6 + 24), you pay full ZUS. In 2026, this is approximately 1,600-1,700 PLN per month, depending on exact health insurance calculations. This is a significant cost, but even at full ZUS, B2B still nets more than an equivalent employment contract in most scenarios.

Full ZUS Breakdown (2026 Approximate Monthly Amounts)

The chorobowa (sickness) contribution is voluntary for JDG owners. Paying it gives you access to sick pay (zasilek chorobowy) and maternity benefits. Most contractors choose to pay it, as it costs relatively little and provides important safety net coverage.

The zdrowotna (health insurance) contribution is calculated differently depending on your tax form. On skala podatkowa or podatek liniowy, it is 9% or 4.9% of your actual income respectively. On ryczalt, it is a fixed amount based on your annual revenue bracket. This distinction significantly affects which tax form is optimal for you.

The Three Tax Forms Compared

Example Calculations: 15,000 PLN/Month Gross Revenue

At 15,000 PLN per month with minimal deductible business costs, ryczalt at 12% is the clear winner. The combination of a low flat rate on revenue and fixed health insurance contributions results in the highest take-home pay.

Example Calculations: 25,000 PLN/Month Gross Revenue

At 25,000 PLN per month, the differences become even more dramatic. Ryczalt saves over 2,700 PLN per month compared to skala podatkowa and over 1,500 PLN compared to podatek liniowy. Over a year, that is 32,000+ PLN in additional take-home pay.

For IT professionals (PKD codes 62.01.Z, 62.02.Z, 62.03.Z, 62.09.Z, 63.11.Z), the applicable ryczalt rate is 12%. For many other professional services (marketing, management consulting, translation), rates of 8.5% or 15% may apply. Always confirm your PKD code's ryczalt rate before choosing this tax form.

Use our salary budget calculator to model different income scenarios and see how each tax form affects your monthly budget.

Mandatory vs Voluntary VAT Registration

Mandatory: If your annual revenue exceeds 200,000 PLN (approximately 16,700 PLN/month), you must register as a VAT payer (VAT czynny). You must register before exceeding the threshold, not after.

Voluntary: Even below the threshold, you can choose to register. This makes sense if you have significant business expenses with VAT (equipment, software, coworking fees) because you can deduct input VAT from your output VAT liability. For service-based B2B contractors with minimal expenses, staying VAT-exempt is usually simpler.

Most B2B contractors in IT earn above the 200,000 PLN threshold (that is only about 16,700 PLN/month in revenue), so VAT registration is effectively mandatory for most readers of this guide.

VAT for International Clients

If you provide services to clients outside Poland, VAT treatment depends on where the client is located:

EU clients (B2B): Your services are subject to the reverse charge mechanism. You issue an invoice with 0% VAT and note "reverse charge" (odwrotne obciazenie). The client accounts for VAT in their country. You must register for EU VAT (VAT-UE) and file periodic EU sales declarations.

Non-EU clients: Services are generally not subject to Polish VAT (not in the scope of Polish VAT). You invoice without VAT. This is the simplest scenario and common for contractors working for US or UK companies.

Even if all your clients are foreign and your invoices carry 0% or no VAT, being VAT-registered still allows you to reclaim VAT on your Polish business expenses -- a nice bonus.

Option 1: Biuro Rachunkowe (Accounting Office)

A biuro rachunkowe is a Polish accounting office that handles your monthly bookkeeping, tax filings, ZUS declarations, and annual returns. This is the most popular option for B2B contractors who want to focus on their work rather than tax compliance.

Costs range from 200 to 500 PLN per month depending on the complexity of your business (number of invoices, VAT status, expense volume). English-speaking accounting offices are available in all major cities, and many work entirely remotely. For a straightforward B2B contractor issuing 1-2 invoices per month, expect to pay 250-350 PLN.

Your accountant will file your monthly ZUS declarations (DRA), VAT returns (JPK_V7M or JPK_V7K), advance income tax payments, and your annual tax return. They will also advise you on tax optimization and flag any compliance issues.

Option 2: DIY with Accounting Software

If you are comfortable with numbers and want to save on accounting fees, several Polish SaaS platforms let you manage your own JDG accounting. The most popular are:

iFirma -- from 149 PLN/month. Full accounting, invoicing, ZUS and tax filing, bank integration. English interface available. Best for tech-savvy contractors.

wFirma -- from 59 PLN/month for basic plans. Invoicing, expense tracking, and basic tax calculations. Good for ryczalt taxpayers with simple needs.

InFakt -- from 99 PLN/month. Invoicing, accounting, and a hybrid model where you do the invoicing but their accountants handle filings. Good middle ground.

Even with DIY software, consider having an accountant review your setup in the first year. A one-time consultation (200-400 PLN) can prevent costly mistakes.

What Goes on a Polish Invoice (Faktura)?

Every invoice you issue must include: your full name and business name, your NIP number, the client's name and NIP (or VAT-UE number for EU clients), a sequential invoice number, the date of issue and date of service, a description of the service provided, the net amount, VAT rate and amount (or "zw" if VAT-exempt, "NP" if not applicable, or "odwrotne obciazenie" for reverse charge), and the gross amount.

Invoices can be in any language, but if the client is Polish, a Polish version is standard. For foreign clients, English invoices are fine -- but all invoices must be available in Polish for tax inspection purposes. Most accounting software generates bilingual invoices automatically.

1. Missing the ZUS Registration Window

When your JDG becomes active, you have 7 days to register with ZUS (the ZUA or ZZA form, depending on your contribution type). Missing this deadline can result in penalties and backdated contributions with interest. Your CEIDG registration does not automatically register you with ZUS -- it sends notification, but you should verify your registration through PUE ZUS (the ZUS online portal) within the first week.

2. Choosing the Wrong Tax Form

Many foreigners default to skala podatkowa (the progressive scale) because it seems familiar, or they choose podatek liniowy because 19% sounds reasonable. For the majority of B2B contractors -- especially in IT -- ryczalt is the optimal choice. Run the numbers for your specific income level before deciding. You can only change your tax form at the beginning of the calendar year (by January 20), so a wrong choice locks you in for 12 months.

3. Forgetting to File JPK_V7

If you are VAT-registered, you must file JPK_V7M (monthly) or JPK_V7K (quarterly for smaller businesses) by the 25th of the following month. This is Poland's unified audit file that combines the VAT return with detailed transaction data. Missing the deadline triggers automatic penalties. Set a calendar reminder or ensure your accountant has this on their schedule.

4. Mixing Personal and Business Finances

While Polish law does not strictly require a separate business bank account for JDG, using your personal account for business is a terrible idea. It makes accounting a nightmare, increases the risk of errors during tax audits, and looks unprofessional on invoices. Open a dedicated business account -- many Polish banks offer free business accounts for JDG (mBank, ING, Alior). See our guide to opening a bank account in Poland for details.

5. Not Understanding the Ulga na Start Window

The Ulga na Start (6-month ZUS relief) is a one-time benefit. If you register your JDG and then close it within the first 6 months (e.g., because the project fell through), you have used your Ulga na Start. You cannot claim it again unless 60 months (5 years) have passed since your last JDG closure. Plan your registration timing carefully -- do not register before you have a confirmed contract.

6. Ignoring Advance Tax Payments

On skala podatkowa or podatek liniowy, you must make monthly advance income tax payments by the 20th of the following month. On ryczalt, the same applies. These are not optional -- missing them triggers interest charges. Many new JDG owners are surprised by this requirement because employees never think about advance payments; their employer withholds tax automatically.