What is the tax difference between financing a branch and a subsidiary from Switzerland?

Since a branch does not have its own legal personality, sending funds from the Swiss parent company is a simple internal cash transfer. Conversely, financing a foreign subsidiary (which is an independent company) requires an equity contribution or an intercompany loan subject to strict FTA rules on interest rates.

What is the FTA's thin capitalization rule?

It is a directive from the Federal Tax Administration that prevents a Swiss parent company from financing its subsidiary almost exclusively with debt. If the loan is disproportionate to equity, the excess debt is reclassified for tax purposes as equity, resulting in penalties and a 35 percent withholding tax on interest.

How can foreign exchange losses be avoided when funding a subsidiary in the Eurozone?

To avoid the exchange rate margin (spread) charged by traditional banks on SWIFT transfers, the Swiss parent company should use a relay account like ibani. CHF is converted at the real interbank rate, with a transparent 0.05 % fee, before being transferred in Euros to the foreign subsidiary's account.

Financing a foreign branch from Switzerland

The Essentials for 2026 (In Brief)

Subsidiary or Branch? A branch legally depends on the Swiss headquarters (simple cash transfer). A subsidiary is independent (requires a capital contribution or formal loan).
Thin capitalization rule (FTA): If the Swiss headquarters finances its subsidiary almost exclusively with debt, the FTA will reclassify the excess as equity (risk of a 35 % tax adjustment).
"Safe Harbour" Rates: Intercompany loans must comply with the annual interest rates set by the Federal Tax Administration.
FX Optimization: Traditional SWIFT transfers destroy between 1.5 % and 2.5 % of your capital in hidden fees. Use a dedicated Swiss IBAN via ibani to convert at the interbank rate under transparent conditions.

1. Subsidiary or Branch: Two legal and financial realities

For an SME based in Geneva or the canton of Vaud wishing to establish itself in neighboring France (Valserhône, Pays de Gex, Haute-Savoie), Germany, or Italy, the choice of legal structure determines how funds can legally cross the border (in accordance with the Swiss Code of Obligations - CO).

Analysis Criteria	Branch (Zweigniederlassung)	Subsidiary (Independent Company)
Legal Personality	None (Extension of the Swiss parent company)	Local law company (e.g., SARL in France, GmbH in Germany)
Nature of funds transfer	Simple cash allocation (Internal transfer)	Equity contribution OR Formalized intercompany loan
Repatriation of profits	Free (Integrated into the Swiss headquarters' income statement)	Subject to dividend tax (and Swiss withholding tax)

2. FTA tax rules: Avoid adjustments

When the Swiss parent company finances a foreign subsidiary (in Munich, Milan, or Paris) through a loan (debt) rather than a capital increase, the financial flows enter the radar of the Federal Tax Administration (FTA).

The Thin Capitalization Rule (Circular No. 6)

To prevent groups from depleting their Swiss tax base by transferring profits in the form of borrowing interest, the FTA imposes a maximum debt ratio (Debt-to-Equity ratio). If the Swiss headquarters lends a completely disproportionate amount compared to the subsidiary's equity, the excess debt is reclassified as hidden equity.

Consequence: the interest related to this excessive debt is refused as a deductible expense and reclassified as a "hidden profit distribution", triggering the withholding tax at 35 %.

"Safe Harbour" Rates (Transfer Pricing)

For an intercompany loan to be validated for tax purposes (Arms-length principle), the applied interest rate must comply with the "Safe Harbour" schedules published annually by the FTA. If the headquarters lends money at a rate lower than the market rate, the cantonal tax authority will increase the Swiss profit by the amount of interest that should have been collected.

3. Cash transfer: The hidden cost of traditional banks

Beyond the legal challenge, cross-border financing poses a major operational challenge: converting Swiss Francs (CHF) into Euros (EUR) or other currencies.

Imagine a Vaud-based SME that needs to inject 500,000 CHF into its new Lyon subsidiary. The common reflex is to initiate an international SWIFT or SEPA transfer from the e-banking of the headquarters' traditional bank.

Transfer method	Exchange margin	Impact on 500,000 CHF
Traditional Swiss bank	Between 1.5 % and 2.5 %	Loss of 7,500 CHF to 12,500 CHF
ibani Business Solution	0.05 %	Net saving of 7,250 CHF to 12,250 CHF

The company's prolonged exposure to traditional banking methods also generates disastrous realized exchange losses (FX Loss) when closing consolidated balance sheets.

4. Strategic optimization with ibani Business

As a regulated and recognized Swiss financial intermediary, ibani allows SMEs to streamline this intercompany flow while protecting their seed capital.

A dedicated Swiss IBAN: We assign a relay account (CH IBAN) to your SME. To endow your subsidiary, you make a simple, free domestic transfer from your Swiss bank to this IBAN.
Transparent Interbank Rate: Upon receipt, the funds are converted at the true interbank market rate. The savings on large financing volumes are immediate and substantial (as demonstrated above).
Accounting compliance: Our execution notices (PDF) contain the exact data of the applied rate, drastically simplifying accounting consolidation and your fiduciary's work.