Tax Investigations & Appeal London
Tax Investigation, Audit & Dispute Resolution Specialists in
London & United Kingdom (UK)
Expert HMRC Defence and Tax Risk Management for UK Businesses and Individuals.
If you are facing an HMRC enquiry or seeking to proactively manage your tax risk, AcumenAGC provides the high-level technical expertise required to protect your financial interests. We bridge the gap between complex UK tax law and practical, stress-free resolution.
HMRC Investigation Defence
Full representation during audits and enquiries.
Voluntary Disclosures
Professional guidance on correcting past tax errors.
Dispute Prevention
Proactive tax risk reviews to ensure 100% compliance.
Fixed-Fee Certainty
No hidden costs during a stressful time.
Service Overview
Comprehensive Tax Dispute & Audit Support
Navigating the complexities of UK tax investigations requires more than just standard accounting; it requires a strategic legal and financial defence. At AcumenAGC, we specialise in Tax Investigation, Audit & Dispute Resolution, providing a shield for taxpayers facing scrutiny from HMRC.
Whether it is a full COP9 investigation (fraud) or a routine compliance check, our role is to manage all correspondence, negotiate settlements, and minimise potential penalties. We ensure your case is handled with the utmost discretion and technical precision, strictly adhering to the Taxes Management Act 1970 and current Finance Act updates.
Who needs it?
Our London-based tax specialists support a diverse range of clients across the UK, including:
- SMEs & UK Limited Companies
- Startups & Tech Firms
- High-Net-Worth Individuals
- Landlords & Property Investors
100%
UK GAAP & IFRS Compliance
Who This Service Is For
Tailored Wealth Protection for Every Goal
Our London audit team tailors every review to your specific industry requirements.
SMEs & UK Limited Companies
Managing corporate tax enquiries and VAT audits.
Startups & Tech Firms
Defending R&D tax credit claims and SEIS/EIS compliance.
High-Net-Worth Individuals
Addressing complex personal tax filings and offshore asset disclosures.
Contractors
Navigating IR35 disputes and self-assessment challenges.
Landlords & Property Investors
Resolving disputes related to Capital Gains Tax and Rental Income.
10+
Years of Experience
500+
Audits Completed
98%
Client Retention
24h
Response Time
Why Choose AcumenAGC
Why Choose AcumenAGC for Tax Defence?
Choosing the right UK accountants for tax investigations can be the difference between a minor settlement and a significant financial loss.
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HMRC Experience: Our team includes specialists who understand HMRC’s internal manual and "Connect" software capabilities.
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Compliance-First Approach: We don't just fix problems; we build Tax Risk Management frameworks to prevent future disputes.
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Transparent Fixed Pricing: No hidden hourly "investigation fees." You’ll know exactly what the defence costs from day one.
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London Expertise, UK-Wide Reach: Based in the heart of London, we represent clients from Manchester to Cornwall via secure digital portals.
OUR PROCESS
Our Proven Process
We use a streamlined, tech-enabled approach to minimize disruption to your daily operations.
Step 01
Initial Case Assessment
We review all HMRC correspondence and your financial records to identify the scope of the risk
Step 02
Defence Strategy Development
We prepare a robust Defence File, gathering evidence to support your tax position.
Step 03
HMRC Liaison & Negotiation
We act as your authorised agent, handling all meetings and letters so you don’t have to speak to HMRC directly.
Step 04
Settlement Optimisation
We negotiate to reduce penalties and interest, ensuring any settlement is fair and manageable.
Step 05
Future-Proofing
We implement a Tax Dispute Prevention plan to ensure your future filings remain beyond reproach.
FAQ
Statutory Audit Services: London & UK FAQ
How long does an HMRC tax investigation last?
The duration varies based on complexity. A simple compliance check may take 3–6 months, while a full tax investigation into a UK limited company can last over a year. AcumenAGC works to expedite the process by providing HMRC with precise, well-organised data.
What triggers a tax audit in the UK?
HMRC uses an AI system called “Connect” to flag inconsistencies in reported income, lifestyle indicators, or industry benchmarks. Sudden changes in profit margins or frequent late filings are common triggers.
Can I appeal an HMRC decision?
Yes. You generally have 30 days to appeal an HMRC assessment. We specialise in HMRC Investigations & Appeals, representing clients at the First-tier Tribunal (Tax) if a resolution cannot be reached through internal review.
Is it better to make a voluntary disclosure?
Usually, yes. Making a Voluntary Disclosure via the Digital Disclosure Service (DDS) often results in significantly lower penalties than if HMRC discovers the error themselves.
Do I need a specialist firm or my regular accountant?
While regular accountants are great for compliance, a tax dispute specialist has the specific forensic experience required to handle adversarial situations with HMRC inspectors.
Our Locations
Expert Tax Investigations & Appeals Specialist in the Heart of London
Based in the heart of the capital, we serve clients across all London boroughs, from the financial hub of the City of London and Canary Wharf to the thriving tech scenes in Shoreditch and Camden.
Canary Wharf &
Docklands (E14)
Westminster & Central London
The City of London (The Square Mile)
Camden, Islington & North London
Canary Wharf HQ
London, UK
Protect Your Business Today
Don’t face HMRC alone. Professional representation is the most effective way to ensure a fair outcome and minimize potential liabilities.
Book a confidential consultation with an AcumenAGC specialist. We respond to all enquiries within 24 business hours.