🇨🇭 Switzerland — 🇮🇹 Italy

Tax Treaty / Double Tax Avoidance Agreement detail

The Switzerland–Italy double taxation convention was signed on 9 March 1976 and entered into force on 27 March 1979, forming the bedrock of cross-border tax relations between the two countries. The treaty caps withholding tax on dividends at 15% (portfolio rate), interest at 12.5%, and royalties at 5%. Separately, qualifying group structures benefit from effective exemptions under the 2004 Swiss–EU bilateral savings agreement, which mirrors the EU Parent-Subsidiary and Interest & Royalties Directives for Swiss entities holding at least 25% of an Italian company for two or more years. A landmark Protocol signed on 23 December 2020 — and in force from 17 July 2023 — fundamentally reformed the taxation of the approximately 85,000 Italian-resident cross-border workers (frontalieri) who commute daily into canton Ticino, Grisons, and Valais. Under the transitional arrangement, 'old' frontalieri (those already commuting before the Protocol came into force) continue to be taxed exclusively at source in Switzerland, while 'new' frontalieri are subject to shared taxation: Switzerland withholds up to 80% of its normal tax and Italy taxes the same income, with a credit mechanism to prevent double taxation. The Protocol's entry into force also triggered Italy's removal of Switzerland from its tax-haven blacklist (the so-called 'black list' under Ministerial Decree 4 May 1999), which had long complicated Italian-resident taxpayers' dealings with Swiss counterparts. Both countries have signed the OECD Multilateral Instrument (MLI); Switzerland applies the Principal Purpose Test and mandatory binding arbitration, aligning the treaty with BEPS minimum standards. Automatic Exchange of Information (AEoI) between Switzerland and Italy under the OECD Common Reporting Standard commenced with the first exchange in 2018, significantly reducing banking secrecy advantages. For high-net-worth Italian nationals, Switzerland's lump-sum taxation regime (forfait fiscal) remains attractive, but the AEoI and the tightened frontalieri rules have narrowed historic planning opportunities. Social security coordination is governed not by a bilateral totalization agreement per se but by Switzerland's 2002 bilateral agreement with the EU on the free movement of persons, which incorporates the EU social security coordination regulations and applies to Italy.