Poland IP Box 5% Tax Calculator (ulga IP BOX)

IP Box (Innovation Box), under Art. 30ca of Poland's PIT Act, lets a taxpayer tax income from a "qualified IP right" (in practice, almost always copyright to a computer program) at a preferential 5% rate instead of the standard skala (12%/32%) or liniowy (19%) rate. It applies to sole traders (jednoosobowa działalność gospodarcza) and companies who genuinely conduct R&D activity and create, develop, or improve the qualifying IP themselves. It cannot be combined with ryczałt (lump-sum revenue tax): a contractor on ryczałt is excluded entirely, full stop.

The nexus ratio limits the 5% rate to the share of qualifying IP income attributable to your OWN R&D work, calculated from four cost categories as ((a+b)×1.3+c+d)/(a+b+c+d). This calculator takes the ratio as a direct input rather than deriving it from itemized costs, since that requires proper R&D cost records. Solo contractors with minimal outsourced R&D commonly land close to 100%, but tax authorities have taken inconsistent positions on how to treat contractors with very few direct costs: confirm your real ratio with an accountant rather than assuming the maximum.

No. IP Box only changes the PIT rate applied to qualifying income; it has no effect on ZUS social-insurance contributions or NFZ health insurance, which stay identical to your baseline skala or liniowy calculation. This calculator keeps those figures unchanged between the baseline and IP Box scenarios for that reason.

That's the honest question worth asking, and it's fair to feel this one is unfair. Poland's Ministry of Finance has proposed requiring a taxpayer to employ at least 3 full-time staff, or incur monthly remuneration costs for 3 people at least 3x the average enterprise-sector salary, to qualify for IP Box at all from 2026 onward. A one-person shop writing genuinely original software, with real nexus, real R&D, real qualifying IP, would be excluded purely on headcount, not on the substance of their work. The stated rationale is closing perceived abuse by shell-like setups, but the practical effect would hit the same solo B2B developers the relief was arguably designed to reward for building IP in the first place. As of this calculator's most recent verification, the proposal remains on hold and not yet in force, but the risk is real and can move without much notice.

No. IP Box requires skala or liniowy taxation, and Polish B2B contractors can only change their taxation mode once a year, generally by the 20th of the month following the month you first earn revenue in a new tax year (or by switching at year-end for the following year). If you're on ryczałt today and want IP Box, you'll need to plan the switch for your next tax year rather than mid-year, and weigh whether the ryczałt-vs-liniowy trade-off still favours the change once IP Box is factored in.

Partially. You generally cannot apply both reliefs to the exact same income in the same way, but a taxpayer can deduct eligible R&D costs from income NOT covered by IP Box, and certain IP Box-eligible taxpayers can also deduct qualified R&D costs when computing IP Box income itself. The interaction is genuinely complex and outside this calculator's scope: consult an accountant if you're weighing both reliefs together.

It's a simplified estimate, not tax advice, current as of 2026. It approximates the pro-rated PIT on non-IP-Box income using your baseline mode's overall effective rate rather than fully recomputing bands on the smaller remaining base (exact for liniowy's flat rate, an approximation for skala's progressive bands), and takes qualifying IP share and nexus ratio as direct inputs rather than deriving them from itemized R&D records. It also can't predict whether the Ministry of Finance's proposed 3-employee eligibility rule takes effect mid-year. Always confirm your actual eligibility, nexus ratio, and PIT liability with a Polish accountant (księgowa/księgowy) before relying on IP Box for a specific tax year.