A global tax floor changed the geography calculation
The OECD's two-pillar agreement proposed changes to where large multinationals' profits would be taxed. Its thresholds left most startups outside direct scope, while changing the assumptions behind expansion and acquisition.
A software business can sell into a country without building a factory there. Its engineers, intellectual property, contracts and customers can also sit in different jurisdictions. The OECD/G20 agreement of 8 October 2021 addressed the resulting tension between where multinational businesses earned money and where governments could tax it. The proposed 15% minimum rate was the most visible element of a much larger allocation problem.
For a young company, the announcement did not create an immediate worldwide 15% tax bill. It established a negotiated framework, revenue thresholds and an ambitious implementation programme. Its relevance was more specific: tax advantages needed to be evaluated against the rules that might apply at scale, after an acquisition, and across the actual countries in which a business operated.
Two pillars answered different questions
Pillar One would reallocate part of the profits of the largest and most profitable multinationals to market jurisdictions. The statement set its initial scope at global turnover above €20 billion and profitability above 10%, with exclusions for extractives and regulated financial services. For companies in scope, 25% of residual profit above the 10% margin would be allocated to qualifying markets. This allocated taxing rights without setting a common corporate tax rate.
Pillar Two proposed a minimum effective tax for multinational groups meeting the €750 million revenue threshold used for country-by-country reporting. Its main rules would apply a 15% minimum on a jurisdictional basis. Comparing the two revenue thresholds helps prevent a common analytical error: exposure to one pillar could not be inferred simply from selling digital services abroad.
A headline rate could miss the mechanism
The proposed income inclusion rule would impose a top-up tax on a parent for income of a constituent entity taxed below the minimum rate. A complementary undertaxed payment rule would deny deductions or require an equivalent adjustment where that income was not taxed under the inclusion rule. The intended effect was to reduce the benefit of placing covered profit in a jurisdiction charging less when another participating jurisdiction could collect the difference.
That did not make the effective rate identical to a country's advertised corporation tax rate. The statement envisaged a common definition of covered taxes, adjustments to financial accounting income, treatment of timing differences and exclusions linked to payroll and tangible assets. A venture model that simply replaced every foreign tax assumption with 15% would have obscured those distinctions.
Scale and ownership changed the question
Most young companies were far below the stated revenue threshold, and a business consuming cash could face more immediate concerns than tax on profits. Even so, the agreement explicitly allowed countries to apply the income inclusion rule to domestically headquartered multinationals below €750 million. A small company still needed to assess its likely exposure in each jurisdiction; its size did not guarantee a permanent exemption.
An acquisition could also change which entities fell within the calculation. A startup considering a sale needed to understand how its entities, intellectual property and profits would fit into the buyer's group. The statement excluded certain investment funds that were ultimate parent entities, but that wording did not give every operating company with venture investors a blanket exemption. Ownership and consolidation required their own examination.
The agreement became more definite between July and October
The July statement had described a minimum rate of at least 15%, a 20–30% share of residual profit for Pillar One and several unresolved design choices. October fixed those first two parameters at 15% and 25%. That movement mattered for planning because it narrowed the range of possible outcomes without completing the legislative work required to deliver them.
- 1 July 2021
Initial two-pillar statement
Minimum rate: at least 15%. Proposed market allocation: 20–30% of residual profit above a 10% margin. Further design work due in October.
- 8 October 2021
Parameters fixed in the agreement
Minimum rate: 15%. Market allocation: 25% of residual profit above a 10% margin. The statement added a detailed implementation plan.
The OECD statements describe negotiated design choices, not taxes already effective in every participating country. Percentage shares of residual profit are distinct from minimum effective tax rates.
The implementation programme aimed for Pillar Two to enter domestic law in 2022 and take effect in 2023, with the undertaxed payment rule following in 2024. These remained targets until the necessary legislation was in place. The GloBE rules were also a common approach: members were not obliged to adopt them, but adopting members would implement them consistently and accept their application by others. Signing the agreement did not itself change a country's tax system.
A finance stack needed a defensible map of the business
For accounting and enterprise software suppliers, the proposal highlighted a practical information problem. A group needed to connect legal entities, financial income, taxes and operational substance across countries. A calculation engine could only be as dependable as the underlying records and the explanations for adjustments. Software that preserved those relationships offered a clearer value proposition than a dashboard displaying a single blended rate.
Founders choosing an international base still had to weigh engineering talent, customers, access to capital and the cost of running the business. The tax framework strengthened the case for modelling those operating facts separately from tax incentives. A structure could remain commercially useful even if its tax advantage narrowed; a structure justified only by a rate differential faced a more fragile investment case.
Sources
- Statement on a Two-Pillar Solution to Address the Tax Challenges Arising from the Digitalisation of the Economy — 8 October 2021 (opens in a new tab)
OECD
- Statement on a Two-Pillar Solution to Address the Tax Challenges Arising from the Digitalisation of the Economy — 1 July 2021 (opens in a new tab)
OECD
Published
