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Compress hours of statute hunting into minutes. So your day belongs to the work only you can do.
Grounded in legislation, HMRC manuals, and guidance. Always up-to-date. Verifiable in one click.
Profiles, documents, and tax positions centralised securely. AI answers in full client context.
Upload any document – from returns to HMRC notices. Spot issues, identify opportunities, get answers in context.
Draft memos, HMRC correspondence, and client letters in seconds. With citations to hand.
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Accurate
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Hallucinated
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Future of Professionals 2025
Increase in billable hours per adviser
Journal of Accounting Research 2026
Time shifted to high-value work
Journal of Accounting Research 2026
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Accountants & tax advisers · 600 clients · North London
“GAIN Tax is going to be as accurate as possible because it’s picking legislation up. It’s not making it up.”

Using GAIN Tax since October 2025
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