IP Box (ulga IP Box) is a Polish tax relief that lets you pay 5% income tax on qualified income from intellectual property you create, including the copyright to a computer program (PIT Act, art. 30ca). For programmers on B2B, that can mean 5% instead of 12%, 32% or the 19% flat tax on much of their income. It’s only for people running a business, it needs careful records, and only software work that counts as research and development (R&D) qualifies.
This guide explains who IP Box is for, how the 5% is calculated, what records you need, and what may change from 2027. It isn’t tax advice. IP Box is one of the most technical reliefs in Polish tax law, and tax offices look at it closely. Talk to a tax adviser (doradca podatkowy) before you use it, and consider asking for an individual tax ruling.
IP Box: what it is (ip box co to)
The PIT Act sets a 5% tax on “qualified income from qualified intellectual property rights” earned in a business (art. 30ca ust. 1). Qualified rights include patents, utility models, registered designs and, most importantly for developers, the copyright to a computer program (autorskie prawo do programu komputerowego). Polish copyright law protects programs as literary works (Copyright Act, art. 74).
The right only qualifies if you created, developed or improved it yourself as part of R&D activity in your business (art. 30ca ust. 2). The PIT Act defines R&D as creative work, including scientific research or development work, undertaken systematically to increase knowledge and use it to create new applications (art. 5a pkt 38).
Who can use IP Box (ip box dla kogo)
- Sole traders and other businesses. IP Box applies to income from business activity. If you’re an employee on an employment contract (UoP), you can’t use it; ask about 50% author’s costs instead, explained in our tax guide.
- On the tax scale or the 19% flat tax. The Ministry of Finance notes in its 2026 bill that IP Box is used by taxpayers who file PIT-36 (tax scale) or PIT-36L (flat tax) (Sejm print 3137). Ryczałt taxes revenue under a separate act (biznes.gov.pl), so if you pay the 12% ryczałt you’d have to switch tax form to use IP Box.
- For software you write, not just any IT work. Writing new code, building new features or improving existing software in a systematic way can count. Work like pure administration, support, project management or consulting without creating software is much harder to argue.
IP Box for programmers on B2B: how it works
A typical B2B developer’s contract says the client pays for your work and you transfer the copyright (or grant a licence) to the code you write. Income from selling or licensing a qualified right, or from the right being included in the price of a service, counts as income from that right (art. 30ca ust. 7).
In practice that means:
- Your contract must deal with copyright. It should say that the code you create is transferred to the client, or licensed, and how much of your fee is for that.
- You must be able to show what you created. Tie your work to specific pieces of software: repositories, features, modules or releases.
- You keep separate records of income and costs for each qualified right (see below).
The nexus formula: how much is taxed at 5%
Only part of your income from a right may count as “qualified”. The share is set by the nexus ratio (art. 30ca ust. 4 to 6):
(a + b) × 1.3 ÷ (a + b + c + d), capped at 1, where your actual costs are:
| Letter | Costs for |
|---|---|
| a | R&D you carry out yourself on the right |
| b | R&D results bought from unrelated parties |
| c | R&D results bought from related parties |
| d | Buying the qualified right itself |
For a solo developer who writes the code personally and buys nothing from related parties, c and d are usually zero, so the ratio works out above 1 and is capped at 1. That means all the income from the right is qualified. If you buy code from a related company or acquire existing IP, the ratio drops.
Costs not directly linked to the right, such as interest, financial fees and property costs, are left out of the formula (art. 30ca ust. 5).
A simple example
You invoice PLN 300,000 in a year, all for software you created and transferred to the client. Your business costs linked to that work are PLN 20,000, so your income from the right is PLN 280,000. With a nexus ratio of 1, your qualified income is PLN 280,000 and the tax on it is 5%, or PLN 14,000. On the 19% flat tax, the same income would be taxed PLN 53,200. Your ZUS and health contributions are separate and apply either way. The figures are only an illustration; your real calculation depends on your records and costs.
Records you must keep
IP Box stands or falls on records. You must (PIT Act, art. 30cb):
- identify each qualified right separately in your books;
- keep records that show income, costs and profit for each right;
- separate the nexus costs (a, b, c, d) for each right.
If you keep the simpler revenue and expense ledger (KPiR), you show this in a separate register. If your records don’t let the income from qualified rights be worked out, you pay tax at the normal rates (art. 30cb ust. 3).
Many developers also keep a log of work done (tasks, commits, hours) that links each invoice to the software created. The law doesn’t prescribe the format, but it’s the evidence a tax office would ask for.
How to claim IP Box
- In your annual return. You show income from qualified rights in the return for the year you earned it (art. 30ca ust. 11). The PIT Act’s rules on monthly advances don’t include a 5% rate, so ask your accountant how to handle advances during the year.
- Losses from a qualified right can be carried forward against income from the same right for 5 years (art. 30ca ust. 10).
- Ask for a tax ruling. The Director of National Revenue Information (KIS) issues individual tax rulings (interpretacja indywidualna) on request. The fee is PLN 40 for each separate set of facts (Tax Ordinance, art. 14b and 14f). A ruling protects you if you follow it and the facts you described are accurate, which is why many developers get one before using IP Box.
IP Box changes for 2027 (ip box zmiany 2027)
As of 16 October 2026, the IP Box rules in force have not changed: the 5% rate, the nexus formula and the record-keeping rules above are those in the current PIT Act. But a government bill is going through the Sejm.
What the bill proposes. Sejm print 3137, sent to the Sejm on 24 September 2026, would add qualified IP Box income to the base of the solidarity levy (danina solidarnościowa), the 4% charge on income above PLN 1,000,000 a year. The change would first apply to the levy due on 2 May 2028, which covers 2027 income (Sejm print 3137). The bill had its first reading on 6 October 2026 (legislative process).
What was dropped. An earlier consultation draft proposed that IP Box should only be available to taxpayers employing at least 3 people on employment contracts. The consultation report attached to the bill says that proposal was withdrawn after objections that it would shut out sole traders (Sejm print 3137).
What it means for you. If the bill passes as drafted, most programmers won’t notice: the levy only applies above PLN 1 million of income. The bill can still change in Parliament, so check the process page before relying on this.
Is IP Box worth it?
It can be a large saving, but weigh:
- Accounting costs. Separate records, nexus calculations and a work log take time, and accountants may charge more for IP Box clients.
- Risk. If a tax office decides your work wasn’t R&D, or your records don’t support the claim, you pay the difference with interest.
- Your tax form. IP Box doesn’t work with ryczałt. Compare 5% on qualified income under the flat tax with 12% of revenue under ryczałt, including the different health contribution rules. Our tax guide covers both.
Before deciding, work out your take-home pay with the salary after tax calculator. If you’re still choosing between B2B and employment, read paid leave and benefits on B2B and working remotely from Poland for a foreign company.
Frequently asked questions
What is IP Box in Poland?
A tax relief that taxes qualified income from intellectual property you created through R&D in your business at 5%. For programmers, the relevant right is the copyright to a computer program. It’s set out in articles 30ca and 30cb of the PIT Act and needs separate records for each qualified right.
Can a programmer on B2B use IP Box?
Yes, if you run a business, pay tax on the tax scale or the 19% flat tax, create or improve software yourself as systematic R&D work, sell or license the copyright to it, and keep separate records for each qualified right. Employees on an employment contract can’t use IP Box, and neither can people on ryczałt unless they switch.
Does IP Box work with ryczałt?
No. The Ministry of Finance says IP Box is used by taxpayers filing PIT-36 (tax scale) or PIT-36L (19% flat tax). If you pay the 12% ryczałt on revenue, you’d need to change your form of taxation, which has its own deadlines. Compare the two with an accountant before switching.
What changes to IP Box are planned for 2027?
A government bill (Sejm print 3137, September 2026) would add IP Box income to the base of the 4% solidarity levy on income above PLN 1 million, first for 2027 income. An earlier idea to require at least 3 employees was dropped. The bill was still in Parliament on 16 October 2026.
Do I need a tax ruling for IP Box?
It’s not required, but it’s common. A ruling from the Director of National Revenue Information costs PLN 40 per set of facts and protects you if your real situation matches what you described. It’s a good way to check that your work counts as R&D before you rely on the 5% rate.