Accurate answers
Grounded in legislation, HMRC manuals, and guidance. Always up-to-date. Verifiable in one click.
AI-powered tax & business law research
Defensible answers to UK tax questions
Built for tax professionals who value speed, accuracy, and traceability.
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We handle the research. You bring the judgement.
Compress hours of statute hunting into minutes. So your day belongs to the work only you can do.
Client intelligence
Profiles, documents, and tax positions centralised securely. AI answers in full client context.
Document analysis
Upload any document – from returns to HMRC notices. Spot issues, identify opportunities, get answers in context.
Document drafting
Draft memos, HMRC correspondence, and client letters in seconds. With citations to hand.
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Tested. Measured. Published.
Accurate
Tax domains
Hallucinated
Question types
Designed and validated by tax experts.
See the full benchmark ›The impact of tax research AI
5 hrs
Per week saved by AI adopters
Thomson Reuters
Future of Professionals 2025
21%
Increase in billable hours per adviser
MIT Sloan
Journal of Accounting Research 2026
8.5%
Time shifted to high-value work
MIT Sloan
Journal of Accounting Research 2026
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Security and compliance, built in
UK data storage
Customer data hosted at rest in the UK (AWS London)
Open Documentation
DPA, sub-processor list, security practices. All published and current.
No AI training
Your data never trains any model. Contractually guaranteed.
From solo practitioners to national firms, and in-house tax teams
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Trusted by tax professionals
GAIN Tax has cut our research and drafting workload by more than half. It's like giving every advisor an extra few hours each day without adding a headcount.
GAIN Tax equips our accounting team with fast and accurate tax guidance and planning support. It's become one of the most valuable tools in our stack.
Helpful for technical areas where you want to double-check your understanding against legislation.
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