Tax research
Ask complex tax questions and receive clear answers with verifiable sources.
Intelligence for tax and accounting
Intelligence for modern tax teams.
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Research, draft and collaborate with one intelligent workspace built for tax.
The Ratio workspace
The work happens where your team already works.
Ratio combines specialist tax research with practical tools for documents, spreadsheets, email and shared project knowledge.
Word
Draft and revise documents with tracked changes and the context of your project.
Excel
Complete calculations, formulas and structured workbook changes with review controls.
Outlook
Understand email context and prepare professional replies without leaving Outlook.
Authoritative tax knowledge
Grounded in an authoritative library of UK tax material.
Alongside your project context, Ratio can draw on an authoritative tax repository covering comprehensive, up-to-date UK legislation, HMRC guidance and supporting material. When that material is relevant to a question, Ratio uses it to inform the answer — and points to what it worked from.
UK legislation
Comprehensive, current UK tax legislation, used where it bears on the question in front of the team.
HMRC guidance
Published HMRC manuals and guidance that practitioners routinely need to apply and cite.
Supporting material
Related reference material that helps Ratio reason through the detail of a query before a draft is written.
Ratio surfaces the sources behind an answer so your team can verify them directly. Final judgement, review and sign-off remain with you.
Knowledge that travels with the project
Give every conversation the right context.
Share conversations, documents and research inside a project. Ratio can draw on that approved knowledge when project members ask their next question.
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