What is Regulus and how does it work?

Regulus is an AI-powered UK tax assistant designed for professional accountants and tax teams. It generates rapid, source-cited responses to support tax research, drafting and review. Users can ask questions in natural language and use the output as part of their professional workflow.

How should Regulus be used alongside other research methods?

Regulus is designed to support professional users with source-led research material, including references that can be checked at source. It should be used to support, not replace, professional judgement, and important points should still be verified where appropriate.

What types of questions can I ask Regulus?

You can ask about core UK tax areas including income tax, corporation tax, VAT, capital gains tax, IR35 and off-payroll working, PAYE and NICs, pensions, property income, SDLT, penalties and related compliance issues. Responses include a confidence indicator to flag where further checking is likely needed.

Is my data secure and confidential?

Regulus is designed so that conversations are handled securely and are not used to train the model. We do not share your queries with third parties and operate in line with UK GDPR. We recommend avoiding the inclusion of unnecessary personal or highly sensitive client information in queries.

Can I cancel my subscription at any time?

Yes. You can cancel your subscription at any time, and access continues until the end of your current billing period.

How is Regulus kept up to date with tax changes?

Regulus is regularly updated to reflect relevant HMRC announcements, Finance Act changes and related source material. Because tax law changes frequently, users should still check that any response is current and applicable to the matter in hand.

Do you offer team or firm-wide subscriptions?

At present, Regulus is offered as an individual subscription at £29 plus VAT per month. We are exploring wider team and firm options — please get in touch to register interest.

What happens if I reach my monthly query limit?

If you reach your monthly query limit, your allowance will reset at the start of the next billing cycle. If you regularly need more than your allowance provides, please contact us.

Your UK Tax Assistant for Accountants

Built for professional accountants and tax teams who need faster, source-led support for UK tax research and drafting.

Get started Early Access

Regulus is a UK tax assistant for professional accountants and tax teams. Outputs are designed to support professional review and should not be relied on without appropriate checking.

Regulus Dashboard - Track usage, manage conversations, and monitor your AI assistant activity

AI-generated responses - Source-cited detail tailored for UK tax practitioners

Ask UK tax questions - Get AI-powered source-cited responses for professional review

Your Command Center

Track usage, manage conversations, and keep your Regulus activity organised in one place.

Real-time usage tracking and query management
Access to all your conversations in one place
Quick subscription management and billing overview

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Ask UK Tax Questions in Plain English

From capital gains questions to VAT and IR35 issues, get detailed, source-cited responses to support professional review.

Ask questions in natural language
Built for UK tax research and drafting support
Responses designed for professional review, with relevant source references

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Detailed, Reviewable Responses

Get detailed explanations with legislation references, calculation examples, and draft reasoning designed to support professional checking.

Relevant HMRC and legislation references
Worked examples and calculation walkthroughs
Export conversations for internal working papers or draft client communications

Built for Modern Accountants

Core features to support UK tax research and drafting workflows

UK-Specific Expertise

Built specifically for UK tax practitioners, with support across core areas including income tax, corporation tax, CGT, VAT, PAYE, NICs, IR35 and pensions, using relevant HMRC and legislative references.

Secure & Private

Your queries are handled securely and are not used to train the model. Regulus is designed with UK GDPR requirements in mind.

Lightning Fast

Responses in seconds, not a morning of manual research.

Save & Share

Download formatted responses for internal review, working papers, or adaptation into client communications.

Team Friendly

Help your team work from consistent, source-cited UK tax material.

Regularly Updated

Regularly updated to reflect relevant tax changes, HMRC guidance, and related source material.

How It Works

Three steps to faster UK tax research support

Ask Your Question

Type your UK tax query in plain English. No special prompt format needed.

Review the Response

Receive a detailed, source-cited response designed to support professional review.

Export & Share

Download formatted responses for internal use, working papers, or adaptation before sharing.

Put Regulus to work on your next tax query

Use Regulus to speed up UK tax research and drafting workflows.

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Frequently Asked Questions

Everything you need to know about Regulus

Still have questions?

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