Pillar One and Amount A: What Multinationals with Swiss Operations Need to Know in 2026

Pillar One Switzerland is a live strategic question for many multinationals with Swiss subsidiaries, even as the international project’s future remains uncertain. Amount A of the OECD’s two-pillar project is designed to reallocate a portion of the largest groups’ profits to the jurisdictions where their customers are located, cutting across the transfer pricing and permanent establishment logic that has governed Swiss taxation for decades. As international discussions on Pillar One continue, CFOs, group tax directors and in-house counsel benefit from understanding how the proposals would work and from preparing their data, systems, reporting and governance accordingly.

This practitioner-led guide explains how Amount A is designed to work, what it could mean for Swiss operations, and the concrete steps that improve readiness. Read it as a readiness roadmap rather than a theoretical overview, and note that key elements, including whether and when Pillar One takes legal effect, remain unresolved.

Executive summary, what CFOs need to know

Amount A is the centrepiece of Pillar One of the OECD/G20 two-pillar solution and is designed to give market jurisdictions a new taxing right over a share of the residual profits of the very largest and most profitable multinational groups. For groups with Swiss headquarters, principal companies or trading and digital businesses booked in Switzerland, the potential practical consequence is that some profit currently taxed in Switzerland could be reallocated to the countries where end customers sit. That reallocation would be formulaic and is intended to sit alongside, not instead of, existing transfer pricing rules.

The key themes for finance leaders are straightforward: the mechanics are designed to reallocate taxing rights toward market jurisdictions; a proposed revenue-based nexus could create liabilities where there is no physical presence; compliance would require granular, jurisdiction-level revenue data; and Switzerland’s implementation route and any relief mechanisms remain areas to monitor closely through official channels. Importantly, the Pillar One multilateral convention has not entered into force, and its adoption depends on signature and ratification by a critical mass of jurisdictions, an outcome that is not guaranteed. The groups that fare best will be those that treat data readiness and governance as a project to progress now, while tracking whether the underlying rules become binding.

Key action checklist for pillar one switzerland readiness

• Scope screening. Confirm whether the group would meet Amount A’s revenue and profitability thresholds and whether any excluded activities apply.
• Revenue mapping. Map worldwide revenue to market jurisdictions using reliable customer-location indicators.
• Data gap analysis. Identify where ERP, billing and CRM systems cannot yet produce jurisdiction-level revenue reporting.
• Swiss impact modelling. Estimate how much profit might be reallocated away from Swiss entities and the double-taxation exposure that could create.
• Governance. Assign owners across tax, IT and FP&A, and establish board-level oversight of the monitoring and readiness programme.

Background, Pillar One, Amount A and the current context

The two-pillar solution emerged from the OECD/G20 Inclusive Framework’s work on the tax challenges arising from the digitalisation of the economy. The October 2021 Statement on a Two-Pillar Solution set out the political agreement and the core design objectives: Pillar One to reallocate taxing rights over a slice of the profits of the largest groups to market jurisdictions, and Pillar Two to introduce a global minimum tax. That Statement remains a reference point for the policy commitments underpinning Amount A.

Switzerland participated in that consensus and has already moved on Pillar Two through domestic implementation, including a constitutional amendment approved by referendum and the introduction of a domestic supplementary tax. Pillar One, and specifically Amount A, has followed a more protracted path. A Multilateral Convention to Implement Amount A of Pillar One was released by the OECD in 2023, but as of the time of writing it has not been opened for signature by a sufficient number of jurisdictions and has not entered into force.

For multinationals with Swiss operations, the current significance is that the technical rules are sufficiently developed to allow impact assessment and data preparation, even though the final entry-into-force timing, and indeed whether the convention will take effect at all, remains uncertain and depends on ratification.

What is Amount A?

Amount A is a proposed formulaic reallocation of a defined portion of the residual (above-routine) profit of in-scope multinational groups to the jurisdictions where their goods and services are consumed. It is targeted at the very largest groups measured by global revenue and profitability, and it would grant market jurisdictions a taxing right that does not depend on a physical presence there. The OECD’s Amount A materials and draft model rules set out the detailed definitions of scope, nexus, the revenue-sourcing rules and the mechanics for calculating and allocating the amount, together with the rules for eliminating the resulting double taxation.

Where the negotiations stand

The OECD Amount A workstreams have refined the draft rules, the multilateral convention text and the accompanying administration and dispute-resolution framework. The OECD’s website on the two-pillar solution is the canonical place to track the status of the instrument and the associated implementation materials. On the Swiss side, the State Secretariat for International Financial Matters (SIF), the Federal Department of Finance (FDF) and the Federal Tax Administration (FTA) are the authoritative sources for Switzerland’s negotiating stance and any implementation guidance. Multinationals should watch these official channels rather than commentary for definitive positions.

What is changing in Switzerland? In practical terms, the current period is preparatory. The substantive development for Swiss operations is the maturing of the rules and the possibility that, if the convention takes effect, in-scope groups will need Amount A-grade data and reporting. Companies can use this window to model potential impacts, close data gaps and engage governance functions rather than wait for any final legislative switch.

How Amount A would reallocate taxing rights, mechanics that matter to Swiss subsidiaries

The heart of Amount A is the proposed reallocation of taxing rights from the jurisdictions where profit is currently booked, often the group’s principal or headquarter locations, which for many groups include Switzerland, to the market jurisdictions where sales arise. This is a deliberate departure from the arm’s-length principle for a narrow slice of profit. It is not designed to replace transfer pricing; it would overlay a formulaic allocation on top of the existing system for the largest groups, and it requires a mechanism to relieve the double taxation that overlay would otherwise create.

Scope and revenue thresholds

Amount A is intended to apply only to a small population of the largest and most profitable multinational enterprises. The OECD draft rules define scope by reference to global group revenue and a profitability test, with certain sectors carved out (notably extractives and regulated financial services). Groups below the revenue threshold, and those falling within excluded activities, would be outside Amount A entirely. The first step for any Swiss-headquartered or Swiss-hubbed group is therefore a disciplined scope assessment against the exact thresholds and exclusions in the current OECD materials, because being in or out determines whether any of the downstream compliance obligations would apply at all.

Refer directly to the OECD’s published rules for the precise threshold figures and definitions before drawing conclusions, as these are the controlling source.

Amount A allocation mechanics

For in-scope groups, the calculation would isolate a portion of the group’s profit that exceeds a defined routine-return threshold (expressed as a percentage of revenue), and then reallocate a percentage of that residual to market jurisdictions in proportion to the revenue sourced there. In simplified terms: the group determines its adjusted profit before tax, applies the profitability threshold to identify the residual, and applies the reallocation percentage to that residual. That reallocated pool is then distributed across market jurisdictions using the revenue-sourcing rules. A jurisdiction would only receive an allocation where the nexus test is met.

The elimination-of-double-taxation rules then identify which entities and jurisdictions must relieve the tax to prevent the same profit being taxed twice, a point of acute interest where profit is currently concentrated in Switzerland.

What types of revenue are captured

Amount A is aimed at the consumer-facing and digital dimensions of large groups’ activities. Revenue would be sourced to the jurisdiction of the end market using detailed sourcing rules that differ by category of transaction, for example, finished goods sold to consumers, services delivered to customers, and digital or advertising revenues each have their own sourcing indicators. Certain categories of income and certain sectors are excluded. For a Swiss group, the practical exercise is to disaggregate the revenue booked through Swiss entities into these categories and to establish, for each, whether the sourcing rules point to Switzerland or to overseas markets. The OECD materials provide the definitions and category-specific tests that would govern this analysis.

Nexus and the nexus rules for Amount A, implications for Swiss operations

The most conceptually significant feature of Amount A for Swiss operations is its proposed nexus rules. Amount A would introduce a revenue-based nexus: a market jurisdiction would obtain the right to tax a slice of Amount A profit where the group derives at least a specified amount of revenue from that jurisdiction, regardless of whether the group has any physical presence, employees or fixed place of business there. This would be a decisive break from the traditional permanent establishment threshold that Swiss businesses are accustomed to.

Nexus thresholds and tests

Nexus under Amount A is quantitative. A jurisdiction would be a market jurisdiction for a given group where sourced revenue reaches the de-minimis revenue threshold set out in the rules, with a lower threshold applying to smaller economies to ensure they can participate. For a Swiss group, two mirror-image consequences would follow. First, the group’s own sales into overseas markets could create nexus, and therefore new filing and tax exposure, in countries where it previously had none. Second, foreign groups selling into Switzerland could acquire a Swiss market taxing right. The practical task is to test every material revenue stream against the nexus threshold on a jurisdiction-by-jurisdiction basis.

Refer to the OECD Amount A materials for the exact threshold amounts, as they are the definitive source.

Permanent establishment interactions

Amount A is designed to operate independently of the permanent establishment concept. A group could have Amount A nexus in a country with no PE there, and equally could have a PE somewhere that is largely irrelevant to the Amount A allocation. This decoupling matters for Swiss finance teams because the existing map of the group’s PEs, carefully managed under treaty and domestic rules, would not be a reliable guide to where Amount A liabilities might arise. How would Amount A affect Swiss permanent establishments? Existing Swiss PEs would continue to be taxed under ordinary rules and transfer pricing; Amount A would be layered on top for in-scope groups and driven by market revenue, not by the PE analysis.

Groups should therefore run the nexus test separately from their PE inventory.

Compliance, reporting and timelines for multinationals with Swiss entities

Amount A is intended to take legal effect through a multilateral convention, which participating jurisdictions must sign and ratify, followed by domestic implementing measures where required. That convention has not yet entered into force. Switzerland’s route to giving Amount A domestic effect would be a matter for the Federal Council, the Federal Department of Finance and the ordinary Swiss legislative process, and the definitive position will be published through official Swiss channels. Groups should plan on the basis that, if a multilateral instrument comes into force, it is likely to be accompanied by domestic implementing legislation in Switzerland.

Expected implementation steps

The sequence multinationals should anticipate is: adoption and signature of the multilateral convention at the international level; ratification by a critical mass of jurisdictions (including specified large economies) to trigger entry into force; and domestic implementation in Switzerland to align internal law and administration with the convention. Each stage carries its own timing risk, and there is a genuine possibility the convention does not enter into force. The practical lesson is to build readiness against the substantive rules rather than against a fixed calendar date, because the operational data work is broadly the same regardless of the exact commencement date.

Data and systems checklist

Amount A is a data problem before it is a legal one. The allocation would depend on the ability to produce reliable, auditable figures for revenue by market jurisdiction, applying the correct sourcing indicator to each revenue category. The minimum data set includes:

• Revenue by jurisdiction. Total sourced revenue split by market country for each revenue category.
• Customer and delivery location. Reliable indicators of where goods are consumed or services are used, not merely where they are invoiced.
• Sales channel data. Distinction between direct, distributor, online and platform channels, because sourcing rules can turn on the channel.
• Group profit metrics. Adjusted profit before tax and the inputs needed to isolate the residual profit pool.
• Intercompany flows. Data to reconcile any Amount A allocations with existing transfer pricing outcomes and the elimination-of-double-taxation calculation.

Enforcement and dispute resolution

Because Amount A would allocate profit across many jurisdictions simultaneously, the OECD framework contemplates coordinated administration and binding dispute-prevention and resolution mechanisms to give in-scope groups certainty and to avoid multi-country disputes over the same profit. For Swiss groups, engaging early with the emerging mechanisms, and documenting positions contemporaneously, would be central to managing the risk of parallel assessments. Monitor the OECD’s two-pillar materials and the Swiss Federal Tax Administration for the operational detail as it is finalised.

Practical checklist for CFOs and tax directors, preparatory steps for pillar one switzerland

The following prioritised checklist converts the analysis above into an actionable programme. Each action names an indicative owner and a suggested timeframe. Groups should adapt the sequencing to their own scope conclusion, those clearly out of scope can stand down, while borderline and clearly in-scope groups should proceed while monitoring whether the rules become binding.

Immediate actions (0–6 months)

• Scope determination (Tax). Test the group against the Amount A revenue and profitability thresholds and exclusions. KPI: documented in/out conclusion signed by the head of tax.
• Data gap analysis (Tax + IT). Assess whether current systems can produce jurisdiction-level, category-specific revenue data. KPI: gap register with severity ratings.
• Impact model (Tax + FP&A). Build a first-pass estimate of profit reallocated away from Swiss entities and the resulting double-taxation exposure. KPI: modelled Swiss impact range.
• Reporting owners (CFO). Assign accountable owners for each data domain. KPI: RACI matrix approved.

Medium term (6–18 months)

• ERP and reporting changes (IT + Tax). Implement the reporting logic needed to source revenue by market and category on an ongoing, auditable basis. KPI: automated jurisdictional revenue report in test.
• Intercompany agreements (Tax + Legal). Review and, where needed, update intercompany arrangements so that any Amount A allocation and elimination mechanics can be operated cleanly. KPI: updated agreement inventory.
• Relief and credit planning (Tax). Model how double-taxation relief would flow and which entities would bear the elimination obligation. KPI: relief pathway documented per jurisdiction.

Governance and sign-off

• Board oversight (CFO + Board). Bring Amount A readiness into the group risk and audit committee agenda. KPI: scheduled board update cadence.
• Authority engagement (Tax). Establish a plan for engaging the Swiss Federal Tax Administration and, where relevant, foreign administrations on certainty and dispute-prevention. KPI: engagement plan and rulings/APA strategy.
• Documentation governance (Tax + Legal). Put in place contemporaneous documentation standards for sourcing decisions and allocations. KPI: documentation policy adopted.

Interaction with Swiss tax law, treaties and transfer pricing

Amount A would not operate in isolation from Switzerland’s existing tax architecture. It would interact with Swiss federal and cantonal direct taxes, with Switzerland’s extensive double tax treaty network, and with the transfer pricing framework that determines how profit is presently allocated to Swiss entities. The overarching design intent is that Amount A should not produce double taxation, but any relief only works if the domestic and treaty machinery is aligned with the multilateral instrument. Until that alignment is fully operational, exposure to timing mismatches and double taxation is a real planning concern.

Treaty interaction and relief mechanisms

The multilateral convention is intended to modify the interaction between Amount A and existing bilateral treaties so that any new market taxing right coexists with the treaty network. For Swiss groups, the practical questions are how relief for reallocated profit would be delivered, whether by exemption or credit at the level of the entity that surrenders the profit, and how that mechanism dovetails with Switzerland’s domestic methods for relieving double taxation. Because these questions turn on final Swiss implementation choices that have not yet been made, they should be monitored through SIF and FDF publications and factored into scenario planning rather than assumed.

Transfer pricing adjustments and APAs

Amount A is designed to sit on top of the arm’s-length system, which means existing transfer pricing positions would remain in force and must be reconciled with any Amount A allocation and its elimination rules. Groups with advance pricing agreements covering Swiss functions should review whether those APAs remain robust once an Amount A overlay is applied, and whether the interaction could create any risk of the same profit being counted twice. Where profit is concentrated in a Swiss principal structure, the elimination-of-double-taxation rules may direct the relief obligation toward that Swiss entity, making a coordinated transfer pricing and Amount A analysis essential.

Practical hypotheticals and comparison table for pillar one switzerland

Two short, illustrative scenarios show how the analysis could play out for common Swiss structures. These are simplified for explanation and are not a substitute for modelling against the exact OECD rules.

Swiss trading company. A group routes consumer-goods sales through a Swiss principal that books significant residual profit. Under the current position, that profit is taxed in Switzerland under transfer pricing. If the group is in scope for Amount A and the rules take effect, a share of the residual profit could be reallocated to the markets where the goods are consumed, and Switzerland, as a jurisdiction where profit is concentrated, may need to relieve the corresponding tax under the elimination rules.

Swiss digital services subsidiary. A Swiss subsidiary provides digital services to users across many countries with little physical footprint abroad. Today, absent a PE, those foreign markets have limited taxing rights. Under Amount A, the revenue-based nexus could give each qualifying market jurisdiction a right to a slice of the group’s profit, creating new filing obligations that the group’s PE map would not have predicted.

Caption: A simplified contrast of the current Swiss position with the potential effect of Amount A for an in-scope multinational group, assuming the rules take legal effect.

Conclusion, next steps for pillar one switzerland readiness

For pillar one switzerland, the three priority actions are clear: confirm whether the group would be in scope for Amount A, close the jurisdiction-level revenue data gaps, and model the potential Swiss double-taxation exposure while establishing governance across tax, IT and finance. Progressing these steps now, while monitoring whether and when the rules take legal effect, is the difference between a controlled transition and a reactive scramble. This article is general information, not legal advice; contact us for tailored advice on your Swiss operations.

This is general information, not legal advice. Contact us for tailored advice.

Sources

1. OECD, Two-Pillar Solution (Pillar One / Amount A)
2. OECD, Statement on a Two-Pillar Solution (October 2021) and related materials
3. Swiss Federal Tax Administration (FTA / ESTV)
4. State Secretariat for International Financial Matters (SIF)
5. Federal Department of Finance (FDF)