Empower your AI assistant with a specialist tax research tool.

General AI models produce 5 to 10 times more errors on tax questions than specialist tools. Connect GAIN Tax to your AI assistant, get accurate cited research fast, and let your assistant do the rest of the magic.

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Works inside the AI tools you already use

  • Claude
  • Claude Code
  • ChatGPT
  • Codex
  • Gemini
  • Microsoft 365 Copilot
  • Cursor

More AI assistants soon

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Why tax research needs a specialist tool

A wrong rate, the wrong tax year, a citation that does not exist. In tax, each error risks penalties, interest and client trust.

Primary sources

Legislation, HMRC manuals and case law, synced daily.

The right date

Knows which law applied on which date.

Every citation linked

Check any point against its source in one click.

How the GAIN Tax MCP server works with your AI assistant

Ask your assistant

Ask as usual. Mention GAIN Tax when you want it to do the research.

GAIN Tax researches

Legislation, HMRC manuals and case law, returned as a cited answer.

Your assistant does the magic

Memos, client emails and checklists, built on research you can cite.

Connectors run on MCP (Model Context Protocol), the open standard AI assistants and agents use to plug into specialist tools.

GAIN Tax researches. Your assistant does the rest.

Advise on a share sale

My client is selling her shares in the trading company she co-founded. Check in GAIN Tax whether the gain qualifies for Business Asset Disposal Relief, then draft advice in plain English.

Respond to HMRC

Attached is an HMRC compliance check letter. Research each point in GAIN Tax and draft our response for partner review.

Check case law before you advise

An employee is on a 30-month site project. Check in GAIN Tax, including case law, whether travel to the site still counts as travel to a temporary workplace.

Review a restructuring plan

We plan to move a client's rental portfolio into a company. Research incorporation relief and SDLT in GAIN Tax, then list the risks for partner review.

Build GAIN Tax into your AI agents

An AI agent works through a task on its own: it reads the inputs, takes the steps and hands back the result. Add GAIN Tax as the tax research step, and the agents you build get accurate, cited answers at every turn. That is how a general AI agent becomes a tax AI agent.

Triage client queries

Read new questions each morning, research each one and draft replies for review.

Check work before it goes out

Test every tax point in a draft letter or report against the sources.

Prepare review packs

Research a batch of issues overnight and have notes ready for the partner.

Try it on your next tax question

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