- · The Zurich Tax Office issued landmark practice notices on 16 December 2025 clarifying how indirect partial liquidation (IPL) is assessed under Swiss tax law.
- · A six-month balance sheet rule now creates a material timing parameter: sales occurring more than six months after the prior year-end treat that year's full profit as distributable substance.
- · Distributable reserves must be calculated entity by entity across the entire group, including all subsidiaries under unified management — losses in one subsidiary cannot offset reserves in another.
- · Sellers can materially reduce IPL exposure through a five-year non-distribution clause, careful AGM scheduling, and a pre-closing tax ruling for high-risk transactions.
For the individual owner of a Swiss SME, the sale of a closely held company ordinarily produces a tax-exempt capital gain. It is one of the more attractive features of the Swiss tax landscape, and one that sellers reasonably plan around. What is less universally understood is that this exemption carries a structural condition: if the sold company holds significant non-operating substance and the buyer extracts it within five years, the Swiss tax authorities may requalify the seller's capital gain as taxable dividend income. This mechanism is indirect partial liquidation, codified in Article 20a of the Federal Act on Direct Federal Taxation (LIFD).
On 16 December 2025, the Zurich Tax Office published two practice notices that settle several long-contested calculation questions within the IPL framework. For sellers, fiduciaries, and M&A advisors active in Switzerland, these notices are not optional reading.
IPL does not apply automatically to every SME sale. As Hectelion's analysis of the mechanism observes, the rule is triggered only when five conditions are satisfied simultaneously — and breaking any single one is sufficient to remove IPL exposure entirely.
The five criteria under Article 20a LIFD are: first, the seller holds a participation of at least 20 percent in a corporation or cooperative; second, the buyer is either a corporate entity or a natural person recording the shares as business assets; third, the target company holds non-operating, commercially distributable reserves at the time of the sale; fourth, those reserves are distributed within five years of the transaction; and fifth, the seller had actual or constructive knowledge of the buyer's intention to extract that substance.
The legal treatment of this requalification is addressed in detail by Bär & Karrer's comprehensive publication on IPL, which explains how gains reclassified under this mechanism are treated not as capital gains but as taxable income from movable assets — with a correspondingly significant tax consequence.
That consequence is not theoretical. The Federal Supreme Court upheld supplementary tax assessments in rulings 9C_665/2022 and 9C_666/2022 (14 December 2023), dismissing seller appeals and affirming that the charge falls on the seller even when the distribution decision was made entirely by the buyer, years after closing, and the original tax year had long since passed. The retrospective reach of IPL assessments is, to put it soberly, considerable.
The December 2025 notices, analysed by PrimeTax in their English-language commentary, address two calculation points that practitioners have long debated.
The relevant baseline for measuring commercially distributable reserves is the last set of annual accounts approved by the general meeting prior to the sale. The Zurich authority now confirms, however, that if the sale occurs more than six months after that balance sheet date, the profit of the preceding financial year is treated as distributable regardless of whether the AGM has formally approved it. The practical consequence is precise: a seller who closes a transaction in, say, October of year N — more than six months after a 31 December balance sheet of year N-1 — will have that year N-1 profit counted as distributable substance, potentially raising IPL exposure materially compared to an earlier closing.
The second clarification carries broader structural significance. The Zurich authority confirms that distributable reserves must be assessed entity by entity across all subsidiaries and sub-subsidiaries under unified management — not solely at the level of the target company. Critically, losses recorded in one subsidiary cannot be used to offset distributable reserves held elsewhere in the group. A structure that accumulates reserves in subsidiary accounts while showing losses at a different entity level will not reduce the IPL calculation. For group sellers, this requires a thorough upstream revision of any reserve analysis that was prepared only at the consolidated or target-company level.
The concept that underpins the entire IPL framework is "non-operating, distributable substance" — reserves that are commercially distributable under Swiss law and that are not required to sustain the company's ongoing business operations. Surplus cash is the most common example. Non-operating real estate, investment properties held outside the operating activity, and participations unrelated to the core business all fall within scope.
The inverse is equally important. A company whose entire cash balance is genuinely required for its operating cycle does not expose the seller to IPL, even if that cash is later distributed. This places working capital analysis at the front of any due diligence or vendor preparation exercise involving an asset-rich or cash-heavy company. The analysis must be conducted not by reference to consolidated accounts, but through single-entity financial statements for each entity in the group.
One of the more pointed observations in the Zurich practice notices concerns the timing of the annual general meeting. Because the AGM approval date determines the baseline for measuring distributable substance, there is a logical incentive to delay the AGM as a means of reducing the measured reserves at the time of sale. The Zurich authority explicitly cautions against this. Artificial postponements of AGM scheduling to reduce IPL exposure carry tax avoidance risk, and the notices are clear on this point. Consistent scheduling of the AGM in the second quarter, maintained independently of any planned transaction, offers defensible protection. This is not presented as a theoretical concern in the notices — it is a direct warning.
Despite the tightening of the calculation framework, the available structuring tools remain intact. The most direct risk mitigation for a seller is the inclusion of a contractual clause in the purchase agreement prohibiting the distribution of non-operating reserves within five years of closing. If the five-year distribution condition is never satisfied, IPL cannot be triggered, regardless of the buyer's subsequent intentions. The clause shifts the enforcement burden toward the buyer but provides the seller with a meaningful structural safeguard.
For transactions carrying material IPL risk — those involving cash-heavy targets, complex group structures, or buyers with demonstrable intentions to refinance through the target — a pre-closing tax ruling remains the most reliable backstop. The Zurich notices confirm that where a ruling specifically addressed the calculation of commercially distributable reserves, including at group level, and full facts were disclosed with no material change thereafter, the protection of legitimate expectations applies. That safe harbor is narrow, and it does not extend to newly assessed transactions without prior rulings. But for completed transactions that were structured with a ruling in place, it provides binding protection.
Any SME transaction in preparation should now be assessed against the Zurich framework on at least three dimensions. First, the balance sheet timing: identify the last approved accounts and calculate whether the six-month rule will apply at the anticipated closing date. Second, the group perimeter: map all subsidiaries and sub-subsidiaries under unified management and conduct a reserve analysis at single-entity level, without cross-entity netting of losses. Third, the nature of reserves: conduct a working capital analysis to distinguish operationally required cash from distributable surplus.
If material IPL exposure is identified after this audit, the available responses are to restructure the timing or terms of the transaction, include a five-year non-distribution clause in the purchase agreement, or seek a tax ruling prior to closing.
The Zurich practice notices of December 2025 do not introduce new law. Article 20a LIFD and its cantonal equivalent remain unchanged. What the notices provide is the Zurich Tax Office's authoritative interpretation of contested calculation points — an interpretation that, in the absence of Federal Supreme Court override, will govern assessments in the canton. For sellers and their advisors, the relevant question is not whether IPL is a known risk, but whether the existing transaction analysis has been conducted at the level of precision the Zurich authority now explicitly requires.
This post is a market observation only. It does not constitute legal or tax advice. Readers should consult qualified Swiss tax counsel in relation to specific transactions.
