Before you start

PESEL, and address registration within 30 days of moving in
A trusted profile for e-PIT
An employment contract, or a CEIDG registration and NIP
Contemporaneous IP records, if you intend to claim IP Box

Step-by-step

1
Get PESEL and register your address at your own city hall
Both are municipal. In this metropolis that means the city hall of the municipality where you live — Katowice, Sosnowiec, Gliwice, Chorzów or another. Meldunek is legally due within 30 days and the form needs the property owner's signature, so raise it during the lease negotiation.
In personWho: YouFree
2
On employment, do nothing
Your employer registers you with ZUS, withholds tax and issues a PIT-11 by the end of February. NFZ cover follows automatically.
Via employerWho: Your employer
3
On B2B, register in CEIDG and elect a regime
Registration is free and online. You then choose between the progressive scale, the 19% flat rate and ryczałt — 12% of revenue for software development, 8.5% for several adjacent classifications.
OnlineWho: YouFree
4
Meet the election deadline
The taxation form for a year must be declared by the 20th of the month following your first revenue in it — 20 February for a continuing business. There is no late election and no correction.
OnlineWho: YouBy 20 February for existing businesses
5
Think before you put the business address in your flat
Municipal property tax charges residential space at PLN 1.25 per square metre a year in 2026 and space occupied by a business at PLN 35.53. Registering a company at home does not automatically move the whole flat into the higher rate, but a room used exclusively for the business can be reassessed — and the owner, not you, gets the bill. Agree it with the landlord in writing.
OnlineWho: You
6
File by 30 April and do not let e-PIT file itself
e-PIT pre-fills from employer and ZUS data and auto-accepts on 30 April if untouched. Convenient, and it silently forfeits any deduction you did not add and your 1.5% charity allocation.
OnlineWho: YouAnnually by 30 April

Documents you’ll need

PESEL and NIP
PIT-11 from each employer, issued by the end of February
CEIDG extract and revenue records, for sole traders
A separate IP Box ledger, if claiming
Trusted profile credentials for e-PIT

Things most newcomers don’t know

Business space is taxed at roughly 28 times the residential rate, and the ratio is the point.

The Ministry of Finance's 2026 ceilings are PLN 1.25 per square metre a year for residential space and PLN 35.53 for space connected with a business, and Katowice — like Łódź, Poznań, Szczecin and most large cities — adopted the maximum on both. A single room reassessed as business space costs more in property tax than the rest of the flat combined. This is why Polish landlords ask whether you intend to register a company at the address, and why the answer belongs in the lease.

Source: Ministry of Finance — 2026 local tax ceilings; Katowice city resolution

IP Box drops the rate on qualified software income to 5%, and the records must be contemporaneous.

Poland taxes income from qualified intellectual property created through R&D at 5%, and bespoke software written by a contractor commonly qualifies. The catch is evidential: a separate ledger identifying each right and attributing revenue and costs to it, kept throughout the year. Reconstructing it in March is what tax offices reject.

Source: podatki.gov.pl — IP Box relief

ZUS is the number that decides whether B2B is worth it, not the tax rate.

A Polish sole trader pays roughly PLN 2,400–3,400 a month in social and health contributions in 2026 whatever the income tax does. Six months of ulga na start followed by 24 months of preferential ZUS make the early years work, and both are lost if you set up a limited company instead. Below about PLN 15,000 a month of revenue, employment often wins once holiday and sick pay are priced in.

Source: ZUS contribution schedule 2026

Under-26 exemption is worth up to PLN 85,528 a year and does not apply to B2B income.

The relief covers employment and mandate-contract income only. Silesia's universities feed a sector that defaults to B2B, so young hires routinely trade a full income-tax exemption for a slightly higher day rate and end up worse off. If you are under 26, run both numbers before choosing the contract type.

Source: podatki.gov.pl — ulga dla młodych

Common mistakes to avoid

Registering a business at your home address without agreeing the property-tax consequence with the owner.
Writing software on B2B for years without ever setting up the IP Box ledger.
Taking a B2B contract under 26 and forfeiting the income tax exemption.
Missing the 20 February deadline to change taxation form.
Letting e-PIT auto-accept on 30 April with deductions and the 1.5% allocation unused.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.