Swiss IP Box Regime: Which Cantons Offer It, What Qualifies, and How to Claim the 90% Reduction

The IP Box Regime: Introduction

As part of STAF (effective 2020), Swiss cantons are required to offer an IP box regime under Art. 24a StHG. The IP box provides a reduction of up to 90% on net qualifying IP income, dramatically reducing the effective cantonal tax rate on patent and comparable IP income. This replaced the old "mixed company" and "principal company" regimes that were abolished under BEPS pressure.

Qualifying IP Assets

The Swiss IP box follows the OECD nexus approach under BEPS Action 5. Qualifying IP includes:

• Patents registered in Switzerland or abroad
• Supplementary protection certificates
• Utility models, plant varieties, orphan drug designations
• Software protected by copyright — a significant inclusion that opens the IP box to software companies beyond traditional patent-holding entities

Trademarks, brands, customer relationships, and pure know-how do not qualify unless embodied in a qualifying asset above.

The Nexus Ratio

The IP box benefit is scaled by the "nexus ratio" — the proportion of qualifying R&D expenditures (primarily expenditures by the taxpayer itself or by unrelated third parties) to total expenditures incurred to develop the IP. Acquired IP and R&D outsourced to related parties reduce the nexus ratio. A 30% uplift on qualifying expenditures is allowed (to recognise the value of bought-in IP used in combination with in-house R&D).

Formula:

Deductible income = qualifying IP income × nexus ratio × up to 90% reduction rate

IP Box Combined With Participation Exemption

For Swiss holding structures, the IP box at an operating subsidiary level combined with the participation exemption at the Swiss holding level can create a highly efficient structure:

1. Operating company in Zug: pays reduced tax on IP income via IP box
2. Dividends flow up to Swiss holding company: participation exemption applies (near-zero dividend tax)
3. Combined effective rate on IP income flowing to ultimate Swiss shareholder: typically 3–6%

Cantonal IP Box Comparison (Selected)

• Zug: 90% deduction, one of the most flexible for software IP and patents
• Basel-City: 90% deduction, particularly valuable for pharma and biotech IP (home to Novartis, Roche R&D)
• Nidwalden: 90% deduction, combined with low cantonal rate creates very competitive overall rate
• Vaud: 90% deduction, post-STAF competitive positioning for Lausanne-based tech companies

Documentation Requirements

IP box applicants must maintain detailed records: IP register, R&D expenditure tracking by IP asset, revenue attribution by IP asset, nexus ratio computation. ESTV expects professional-level documentation — informal estimates are insufficient for audit purposes.

Source basis: Art. 24a StHG · STAF Implementation 2020 · OECD BEPS Action 5 2015/2020 · Cantonal IP Box Ordinances (Zug, Basel-City, Nidwalden, Vaud).