More and more IT professionals in Poland are considering working under a B2B contract. This may be a programmer moving from employment to self-employment, a computer technician starting a repair business, or a web developer combining several smaller assignments with one larger contract.
Registering a business is relatively simple. Selecting the correct tax model and understanding the actual cost of self-employment requires considerably more attention.
The lowest advertised tax rate is not always the most profitable option. The correct decision depends on the services provided, expected revenue, business expenses, family situation and the terms of the B2B contract.
How to establish a sole proprietorship in Poland
The most common structure for an individual contractor is a Polish sole proprietorship, known as jednoosobowa działalność gospodarcza or JDG.
The business is registered free of charge in the Central Register and Information on Economic Activity, known as CEIDG. During registration, the entrepreneur determines:
- the business name;
- the start date;
- the registered and operating addresses;
- the relevant PKD activity codes;
- the taxation method;
- the accounting arrangements;
- social security registration;
- VAT status.
A sole proprietorship is not a separate legal entity. The entrepreneur conducts the business in their own name and is personally responsible for its liabilities.
This makes the terms of the B2B agreement particularly important. A contractual penalty or unlimited liability clause is not merely a company problem. It may directly affect the entrepreneur’s private assets.
Start-up relief and reduced ZUS contributions
A new entrepreneur may qualify for the start-up relief if they have not operated a business during the previous 60 months and do not provide the same services to a former employer that they previously performed under an employment contract.
The relief applies for the first six full calendar months of the business.
During this period:
- social security contributions amount to PLN 0;
- health insurance remains payable;
- income tax remains payable.
After the start-up relief, the entrepreneur may generally use reduced social security contributions for another 24 months.
In 2026, the minimum reduced social security contribution is approximately:
- PLN 456.18 per month including voluntary sickness insurance;
- PLN 420.86 without voluntary sickness insurance.
After the relief period, standard social security contributions amount to approximately:
- PLN 1,926.76 per month including voluntary sickness insurance;
- PLN 1,788.29 without voluntary sickness insurance.
Health insurance must be added to these amounts.
Health insurance contributions in 2026
The calculation depends on the taxation method.
Progressive tax scale
The health insurance contribution is generally 9% of business income.
The minimum monthly contribution from February 2026 is PLN 432.54.
Flat tax
The health insurance contribution is generally 4.9% of business income.
The minimum monthly contribution is also PLN 432.54.
Lump-sum taxation
For entrepreneurs using lump-sum taxation, the contribution depends on annual revenue:
| Annual revenue | Monthly health contribution |
| Up to PLN 60,000 | PLN 498.35 |
| Above PLN 60,000 up to PLN 300,000 | PLN 830.58 |
| Above PLN 300,000 | PLN 1,495.04 |
A higher threshold may affect the annual health insurance settlement. The entrepreneur should therefore monitor cumulative revenue throughout the year rather than looking only at the current month.
Which income tax method should an IT professional choose?
There is no single taxation method that is best for every IT business.
Progressive tax scale
Under the progressive scale, tax is calculated on profit, meaning revenue reduced by tax-deductible expenses.
The rates applicable in 2026 are:
- 12% up to PLN 120,000 of taxable income;
- 32% on income above PLN 120,000.
The method includes a PLN 30,000 tax-free amount. Subject to the statutory conditions, it may also allow joint taxation with a spouse.
The progressive scale may be attractive where:
- income is not very high;
- the entrepreneur incurs significant expenses;
- joint taxation is beneficial;
- personal tax reliefs are important.
Flat tax
The flat tax is 19% of profit.
It may become attractive at higher profit levels, but it does not provide the standard PLN 30,000 tax-free amount. Joint taxation with a spouse is generally unavailable for business income taxed in this way.
The final comparison should include not only the income tax rate but also health insurance and the loss of personal tax preferences.
Lump-sum taxation
Under the lump-sum system, tax is calculated on revenue rather than profit. Ordinary business expenses do not reduce the taxable amount.
The applicable rate depends on the actual service and its PKWiU classification.
Certain IT services, including software-related services, IT consulting, software installation and system or network management, may be taxed at 12%.
General service activities for which no separate rate has been specified may be taxed at 8.5%. Trade in computer equipment or parts may be taxed at 3%. Some specialised design services may fall under a 14% rate.
Descriptions such as “IT services”, “website support” or “computer assistance” are not sufficiently precise to determine the correct rate.
Computer repairs, software development, IT consulting, website design and the sale of computer parts should be analysed separately. One business may use several lump-sum rates if the different categories of revenue are correctly identified and recorded.
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The lowest tax rate is not always the least expensive option. Your final costs depend on your income, business expenses, the exact services you provide, your family situation and the terms of your B2B contract.
At Kancelaria Podatkowa Mencel, we compare the available options before the business is registered and calculate the expected tax, ZUS and health insurance costs.
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VAT exemption and foreign clients
From 1 January 2026, the general Polish VAT exemption threshold is PLN 240,000 of annual sales.
If the business starts during the year, the threshold is calculated proportionally to the remaining period.
Remaining below this threshold does not automatically eliminate all VAT obligations.
An entrepreneur providing services to companies based in other EU countries may need VAT-EU registration. The invoice may be issued without Polish VAT, but the transaction may still need to be reported.
The analysis should establish:
- where the client is based;
- whether the client is a business or a private consumer;
- whether the client has a valid EU VAT number;
- the type of service;
- the place of supply for VAT purposes.
KSeF obligations
Receiving invoices through the Polish National e-Invoicing System, KSeF, has been mandatory since 1 February 2026.
For the smallest businesses, a temporary exception applies until the end of 2026. If the total monthly sales documented by invoices do not exceed PLN 10,000 gross, invoices may still be issued outside KSeF.
If the threshold is exceeded, the obligation applies from the invoice that causes the threshold to be exceeded.
Even a business benefiting from the VAT exemption may therefore be required to use KSeF.
A B2B contract is not an employment contract
A B2B contractor does not automatically receive the protections granted to an employee.
Unless the contract provides otherwise, the contractor may not have:
- paid annual leave;
- paid sick leave;
- statutory working-time protection;
- severance protection;
- employer-funded equipment;
- statutory notice protection;
- limitation of professional liability.
Before signing a B2B agreement, the entrepreneur should review:
- the remuneration and whether it is stated as a net or gross amount;
- VAT provisions;
- payment deadlines;
- notice periods;
- contractual penalties;
- liability limitations;
- intellectual property clauses;
- confidentiality and non-compete provisions;
- required availability;
- equipment and software obligations;
- rules concerning holidays and illness.
A B2B rate should compensate not only for taxes and ZUS contributions but also for accounting costs, equipment, unpaid holidays, sickness and business risk.
What are the minimum monthly public charges?
During the start-up relief, the minimum monthly public charge may initially consist only of health insurance and income tax.
Depending on the tax method, the minimum health contribution in 2026 starts at:
- PLN 432.54 for the progressive scale or flat tax;
- PLN 498.35 for lump-sum taxation in the first revenue threshold.
During the reduced contribution period, the combined minimum social and health contributions start at approximately:
- PLN 888.72 under the progressive scale or flat tax;
- PLN 954.53 under lump-sum taxation in the first revenue threshold.
After the relief periods, the combined minimum social and health contributions start at approximately:
- PLN 2,359.30 under the progressive scale or flat tax;
- PLN 2,425.11 under lump-sum taxation in the first revenue threshold.
Income tax and accounting costs must be added to these amounts.
How should the decision be made?
Before registering the business, it is worth preparing a calculation based on:
- expected monthly and annual revenue;
- expected business expenses;
- the precise description of each service;
- the proposed B2B contract;
- the client’s country and VAT status;
- eligibility for social security reliefs;
- the entrepreneur’s family and tax situation.
Choosing a tax method based only on the lowest headline percentage can be expensive. A rate that appears lower may become less attractive after health insurance, non-deductible expenses and the loss of family tax preferences are taken into account.
The safest approach is to calculate several scenarios before registering the business and to verify the B2B contract before it is signed.
Frequently Asked Questions
How much does it cost to register a sole proprietorship in Poland?
Registration in CEIDG is free of charge.
The entrepreneur should nevertheless budget for accounting, social security and health insurance contributions, income tax, business software, equipment and, where appropriate, VAT.
Can a foreigner register a sole proprietorship in Poland?
Yes, but the available business structures depend on citizenship and residence status.
EU and EEA citizens can generally establish a sole proprietorship under the same rules as Polish citizens. A non-EU citizen must have an appropriate residence status or choose another permitted business structure.
How much is ZUS for a new business in Poland in 2026?
A qualifying new entrepreneur may use the start-up relief for the first six full calendar months and pay no social security contributions during that period. Health insurance and income tax remain payable.
Afterwards, reduced social security contributions are approximately PLN 456.18 per month including voluntary sickness insurance.
After the relief periods, standard social security contributions are approximately PLN 1,926.76 per month. Health insurance must be added separately.
How much is the health insurance contribution in 2026?
Under the progressive tax scale, the contribution is generally 9% of business income. Under the flat tax, it is generally 4.9% of income.
The minimum monthly contribution under both methods is PLN 432.54.
Under lump-sum taxation, the monthly contribution is:
- PLN 498.35 for annual revenue up to PLN 60,000;
- PLN 830.58 for annual revenue above PLN 60,000 and up to PLN 300,000;
- PLN 1,495.04 for annual revenue above PLN 300,000.
Which tax method is best for an IT contractor in Poland?
There is no single best method for every IT contractor.
The progressive scale may be attractive when income is lower, business costs are significant or joint taxation with a spouse is beneficial.
The 19% flat tax may be relevant at higher profit levels.
Lump-sum taxation can be attractive when expenses are low, but the correct rate depends on the actual service and its PKWiU classification.
A calculation should be prepared before the business is registered.
What is the lump-sum tax rate for IT services?
Certain software, IT consulting, software installation, network and system management services may be taxed at 12%.
Other service activities may qualify for an 8.5% rate, while specialised design services may be taxed at 14%. Trade in computer equipment or parts may be subject to a 3% rate.
The rate cannot safely be determined from a general description such as “IT services”. The actual scope of work and PKWiU classification must be reviewed.
Does a small business have to register for VAT?
In 2026, the general VAT exemption threshold is PLN 240,000 of annual sales.
For a business established during the year, the threshold is calculated proportionally.
However, services provided to foreign clients may create VAT or VAT-EU obligations even if the entrepreneur remains exempt from Polish VAT.
Does a sole proprietor have to use KSeF in 2026?
As a general rule, businesses are covered by KSeF.
However, until the end of 2026, an entrepreneur whose monthly sales documented by invoices do not exceed PLN 10,000 gross may issue invoices outside KSeF.
Once the threshold is exceeded, the obligation applies from the invoice that causes the threshold to be exceeded. Receiving invoices through KSeF has been mandatory since 1 February 2026.
Is a B2B contract more profitable than an employment contract?
It can be, but the B2B rate must compensate for costs and rights that would normally be covered by an employer.
These may include:
- ZUS and health insurance;
- income tax;
- accounting;
- equipment and software;
- unpaid holidays;
- periods of sickness;
- professional liability;
- lack of employment protection.
The proposed rate and the contract should be reviewed before the employment relationship is replaced with B2B cooperation.
Can a business provide services to a former employer?
Yes, but providing the same services to a former employer may affect eligibility for the start-up relief, reduced social security contributions or lump-sum taxation.
The previous employment duties and the new B2B scope should therefore be compared before selecting the tax and ZUS options.
Can one business use different lump-sum tax rates?
Yes. If the entrepreneur provides different types of services or combines services with the sale of goods, different lump-sum rates may apply.
The categories of revenue must be correctly identified and recorded separately.
Start your business with the right structure
Before registering a business or signing a B2B contract, it is worth checking the real monthly cost of each available option.
We will analyse your expected income, expenses, services and contract. You will receive a clear recommendation covering the taxation method, ZUS, VAT, KSeF and the practical steps required to start operating in Poland.
Online consultations are available throughout Poland and for foreign entrepreneurs establishing or operating Polish businesses.
DISCLAIMER
This article reflects the regulations and official contribution amounts applicable in September 2026. It provides general information and does not replace individual tax or legal advice.
OFFICIAL SOURCES
Business registration and taxation through CEIDG:
https://biznes.gov.pl/pl/portal/00120
Social security contributions in 2026:
https://www.zus.pl/-/nowe-wysoko%C5%9Bci-sk%C5%82adek-na-ubezpieczenia-spo%C5%82eczne-w-2026-r.
Health insurance contributions in 2026:
https://www.zus.pl/firmy/rozliczenia-z-zus/skladki-na-ubezpieczenia
Income tax rates and limits:
https://podatki.gov.pl/podatki-firmowe/pit/stawki-i-limity
VAT exemption rules:
Mandatory KSeF rules:
https://ksef.podatki.gov.pl/informacje-ogolne-ksef-20/zakres-obowiazkowego-ksef
