Patent Box

A patent box (also called an innovation box or IP box) is a preferential tax regime under which income derived from qualifying intellectual property—typically patents, and sometimes copyrighted software, plant varieties, or supplementary protection certificates—is taxed at a lower rate than ordinary corporate profits. Governments use patent boxes to attract and retain R&D activity, encourage the commercialisation of innovation domestically, and prevent the migration of IP-related profits to lower-tax jurisdictions.

Patent box regimes vary widely in scope and generosity. They typically differ along several dimensions:

• Qualifying IP: some regimes cover only patents; others extend to software, utility models, or know-how.
• Qualifying income: royalties, embedded IP income from product sales, capital gains on IP disposal, and damages from infringement may or may not be included.
• Effective rate: rates have historically ranged from roughly 5% to 15%, well below standard corporate rates.

Patent boxes drew sustained criticism as a form of harmful tax competition, since multinationals could shift IP ownership to a patent-box jurisdiction without commensurate substantive activity. In response, the OECD's Base Erosion and Profit Shifting (BEPS) project addressed the issue in Action 5, which produced the modified nexus approach. Under nexus, the share of IP income eligible for the preferential rate is tied to the proportion of qualifying R&D expenditure actually incurred by the taxpayer in that jurisdiction. Countries with non-compliant regimes were expected to close or reform them, generally by mid-2021.

Several jurisdictions operate nexus-compliant patent boxes, including the United Kingdom, the Netherlands, Ireland (Knowledge Development Box), Belgium, Luxembourg, France, Italy, and Switzerland (at the cantonal level following the 2020 tax reform). The United States introduced a related but distinct mechanism, the Foreign-Derived Intangible Income (FDII) deduction, in the 2017 Tax Cuts and Jobs Act. Empirical evidence on whether patent boxes actually increase real R&D—rather than merely relocating reported IP income—remains mixed.