Automating OECD Pillar Two Tax Compliance with an Agent Skill

Where this fits

Your multinational group just crossed the €750M revenue threshold, and now every low-tax jurisdiction in your footprint is a ticking compliance bomb. You need to compute effective tax rates, identify top-up tax exposure under IIR, UTPR, or QDMTT, and do it across dozens of entities—without building a custom tax engine from scratch. This skill encodes the OECD GloBE Model Rules and commentary into a structured assessment workflow that agents can execute repeatedly.

Why agents benefit

• Structured rule application: The skill provides a step-by-step framework (scope → ETR → SBIE → top-up tax) that prevents agents from skipping critical adjustments like dividend exclusions or deferred tax recalculations.
• Formula-driven calculations: Agents get exact equations for ETR, top-up tax percentage, and excess profit, reducing arithmetic errors and ensuring consistency across jurisdictions.
• Context-aware tool selection: The skill maps inputs (consolidated financials, per-entity statements, tax data) to the right calculation steps, so agents know what data to request and in what format.
• Regulatory grounding: References to OECD Model Rules and commentary keep the agent anchored to current legal definitions, not generic tax advice.
• Repeatable audit trail: By following the skill's framework, agents produce outputs that are explainable and reviewable—critical for internal tax teams and external auditors.

Practical scenarios

Post-merger integration tax review

After acquiring a competitor with operations in Ireland and Singapore, your agent uses the skill to compute each jurisdiction's ETR, flag where the 15% minimum is breached, and estimate top-up tax under both IIR and UTPR—helping you decide which entity structure to rationalize.

Quarterly ETR monitoring for a low-tax subsidiary

Your agent ingests the latest financial statements from a Cayman Islands subsidiary, applies SBIE based on payroll and tangible assets, and alerts you if the effective rate drops below 15%, triggering a QDMTT or IIR obligation.

Country-by-country reporting risk assessment

For a group with 30+ entities, the agent aggregates data by jurisdiction, applies the €750M revenue test, and generates a heatmap of exposure—prioritizing where to allocate transfer pricing documentation efforts.

Add it to your agent workflow

Install the skill via:

npx skills add guoliang1114-boop/AriaAI --skill beps-pillar-two-assessment

Then, in your agent's instructions, reference it like this:

skills:
  - name: beps-pillar-two-assessment
    when: "user asks for GloBE ETR or top-up tax calculation"
    steps:
      - collect consolidated financials and per-entity data
      - apply jurisdiction ETR formula
      - compute SBIE and excess profit
      - output top-up tax by rule (IIR/UTPR/QDMTT)

For a deeper look at how this skill fits into a broader agent ecosystem, see the OpenAgentSkill listing.

Compare before adopting

Before you standardize on this skill, evaluate: Quality signals—check the GitHub repo for recent commits, issue responses, and whether the author updates it when OECD commentary changes. Maintenance freshness—tax rules evolve; a stale skill is worse than none. Alternatives—are there other GloBE calculators or tax-specific skills that integrate better with your data sources? Workflow fit—does the skill's input/output format match your existing agent pipelines (e.g., JSON, CSV, or direct API calls)?

Why it is worth tracking

With 37 stars and an active author, this skill shows early community traction, but the real signal is whether it stays current with OECD releases. Track it if you're building tax-compliance agents or automating finance workflows—re-evaluate after each OECD Pillar Two guidance update to ensure the formulas and exclusions remain accurate. If the skill gains adoption, it may become the de facto standard for GloBE assessments in agent frameworks.