How does Switzerland's IP box (patent box) regime work for qualifying income?

Switzerland introduced the patent box (Patentbox) regime at the cantonal level following the 2020 Corporate Tax Reform (TRAF). The regime allows companies to pay a reduced cantonal and communal income tax rate on qualifying income from patents and comparable rights. Each canton implements the regime within OECD-compliant limits, meaning the tax reduction applies only to income genuinely derived from Swiss-developed IP — the nexus approach.

Qualifying income includes royalties, licensing fees, and embedded IP income from the sale of products that incorporate patented technology developed in Switzerland. The maximum tax reduction in the patent box is 90% of the qualifying income, meaning only 10% of eligible income is subject to cantonal income tax. At a typical combined cantonal rate of 12%, this equates to an effective tax rate of roughly 1.2% on qualifying IP income.

To use the box, companies must track and document the connection between R&D expenditure and the income generated (the modified nexus fraction). They must also maintain proper transfer pricing documentation if the IP is licensed to related parties across borders. Cantons also offer an R&D super-deduction of 50% above actual R&D costs, which can be used alongside the patent box. These incentives make Switzerland attractive for technology, pharmaceutical, and medtech companies.

This is general information only, not professional tax advice. Consult a qualified tax professional for your specific situation.