TP/OS review
A focused web platform for modernizing transfer-pricing documentation and review.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
TP/OS is web-based transfer-pricing documentation software from ArmsLength AI Sp. z o.o. It is designed for advisory and in-house tax teams that need to modernize existing documentation, organize entity and transaction data, reuse templates, and manage recurring Local File work. The product combines source-document analysis, transfer-pricing data modeling, evidence extraction, localized branded Local File generation, and controlled review workflows. AI-assisted extraction and drafting are included, while human reviewers remain responsible for technical positions, assumptions, and local requirements.
Its strongest fit is the documentation workflow itself. Teams can analyze existing documentation and source files, create reusable templates, model relevant data, and roll work forward annually. Role-based access and review flows support a defined sign-off process rather than treating AI output as final. The package structure also maps to different implementation needs: Base includes a ready data model, documentation templates, role-based review, and guided onboarding; Custom adds model extensions, tailored templates and report structures, and a joint rollout; Turnkey adds complete data setup, country-by-country template setup, and a done-for-you rollout.
TP/OS is priced through contact with sales, so buyers should expect a package discussion rather than a self-serve purchase. The web-only platform is a focused choice for documentation teams, particularly those handling several jurisdictions or recurring updates. Its scope is narrower than a broader transfer-pricing suite: the positioning centers on documentation, extraction, modeling, review, and AI drafting rather than verified benchmarking or CbCR. Choose TP/OS when structured documentation modernization and implementation support are the priority; consider an alternative if benchmarking, CbCR, or a wider integration ecosystem is central to the workflow.
TP/OS pros and cons
- Where it wins
- Analyzes source files and extracts facts and evidence
- Supports localized Local Files, templates, and annual roll-forwards
- Adds role-based review controls with human sign-off
- Where it doesn't
- Pricing requires contact with sales
- Web-only platform with no stated integrations
- Focused on documentation rather than benchmarking or CbCR
TP/OS fact sheet, pricing and score →
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