About Pillar Fifteen
We build software that makes complex tax compliance manageable. Pillar Fifteen is purpose-built for the OECD GloBE rules, designed for the people who actually have to apply them.
Compliance software that earns your trust
The OECD Pillar 2 rules represent the most significant change to international tax in a generation. For the groups that fall within scope, the compliance demands are substantial: hundreds of data points per entity, multi-jurisdictional calculations, evolving administrative guidance, and filing deadlines that leave little room for error.
We started Pillar Fifteen because we saw that the tools available to tax teams were not keeping pace with the rules being written. Spreadsheets cannot provide the auditability or computational rigour that GloBE demands. General-purpose tax platforms were not designed for this specific problem. And building an in-house solution is a distraction from the work that tax teams are actually here to do.
Our team has deep experience building regulated compliance software, the kind that has to be accurate, auditable, and trusted by the people who sign off on the numbers. We bring that same discipline to Pillar 2.
Built for tax teams, not IT departments
Workflow-first design
Pillar Fifteen is structured around the actual GloBE compliance workflow: group structure setup, safe harbour assessment, full ETR and top-up tax computation, and information return generation. Every screen maps to a step your team already understands.
Accuracy you can defend
Every calculated figure links back to its source data and the relevant article of the Model Rules or Administrative Guidance. When a tax authority asks how you arrived at a number, the answer is already documented, down to the specific rule reference.
Simplicity without shortcuts
The GloBE rules are complex. The software that implements them does not have to be. We invest heavily in making Pillar Fifteen clear and navigable, so your team can focus on the substance of the compliance work rather than fighting the tool.
Your data, protected
Encryption everywhere
All data is encrypted in transit (TLS 1.3) and at rest (AES-256). Database connections are secured and access-controlled. No data leaves the platform without your explicit action.
EU-hosted
Hosted in EU data centres on infrastructure built for enterprise compliance. Your data stays in the region with predictable residency and no transit out without your explicit action.
Audit trail
Every data input, change, and calculation is timestamped with the user who made it. Full version history is maintained so you can reconstruct the state of any filing at any point in time.
Principles behind the product
- 1 Compliance software must be correct first. Performance, design, and ease of use all matter, but they are worthless if the numbers are wrong. Accuracy is our non-negotiable starting point.
- 2 Tax teams should own their compliance process. We build tools that give your team direct control, not software that creates a new dependency on consultants or IT support to operate.
- 3 Auditability is a feature, not an afterthought. Every figure, adjustment, and decision point in Pillar Fifteen carries a full audit trail. We build this in from the start because retrofitting it later never works.
- 4 The rules will keep changing. The software should keep up. GloBE implementation is still evolving. We track administrative guidance, legislative updates, and country-level adoption so the platform stays current without requiring you to chase every development.
See the platform in action
Book a 30-minute walkthrough with our team. We will show you how Pillar Fifteen handles your group structure, jurisdictions, and compliance workflow.