Tax Investigations & Appeal London
Expert Corporation Tax Accounting in
London & United Kingdom (UK)
Precision Tax Planning and HMRC Compliance for Growing UK Businesses.
Managing your company’s tax position shouldn’t be a source of stress. Whether you are a tech startup in Shoreditch or an established firm in the City, AcumenAGC provides strategic Corporation Tax accounting to ensure you remain fully compliant with HMRC and Companies House while optimizing your tax liability.
HMRC-Compliant Filings
Never miss a CT600 deadline again.
Tax Efficiency
Identify R&D credits and allowable expenses to reduce your bill.
Dedicated Support
Direct access to a senior London-based tax advisor.
Fixed-Fee Certainty
No hidden costs during a stressful time.
Service Overview
Professional Corporation Tax Support
Corporation Tax is a legal requirement for all UK limited companies. It is calculated on your company’s annual profits, and the CT600 return must be filed with HMRC accurately and on time.
At Acumen Accountants & Tax Advisor (AcumenAGC), we go beyond simple data entry. We act as your strategic partner, ensuring that your accounts are prepared in accordance with UK GAAP or IFRS standards. We handle everything from calculating your tax liabilities to advising on the best timing for asset purchases to maximize capital allowances.
Who needs it?
We provide professional Corporation Tax accounting in London for a diverse range of UK entities:
- UK Limited Companies
- SMEs & Startups
- International Subsidiaries
- Contractors & Consultants
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.
UK Limited Companies
From single-director firms to large multi-site operations.
SMEs & Startups
Scalable tax support for businesses in their growth phase.
International Subsidiaries
Non-UK parent companies with a permanent UK establishment.
Contractors & Consultants
Tailored tax planning for professional service providers.
Property Investment Companies
Specific expertise in SPVs and property-related tax legislation.
10+
Years of Experience
500+
Audits Completed
98%
Client Retention
24h
Response Time
Why Choose AcumenAGC
London’s Leading accountants for tax investigations
As UK accountants for Corporation Tax, we bridge the gap between complex tax law and your business's financial health.
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London Expertise, UK Reach: While we are a premier service specialist for UK limited companies based in the capital, we leverage cloud technology to support clients across the entire UK.
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Compliance-First Approach: We stay ahead of shifting UK tax laws and Autumn Budget changes so you don't have to.
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Fixed Pricing: We believe in affordable Corporation Tax services for UK businesses with clear, upfront costs.
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AI-Enhanced Accuracy: We use the latest accounting software to ensure your data is error-free and ready for MTD (Making Tax Digital).
OUR PROCESS
Our 5-Step Tax Process
We use a streamlined, tech-enabled approach to minimize disruption to your daily operations.
Step 01
Discovery & Data Integration
We connect with your bookkeeping software (Xero, QuickBooks, or FreeAgent) to gather financial data.
Step 02
Tax Review & Optimization
Our advisors review your accounts to identify tax-saving opportunities and allowable expenses.
Step 03
Drafting & Client Approval
We prepare your CT600 and tax computations, presenting them to you for a final digital sign-off.
Step 04
HMRC & Companies House Submission
We handle the electronic filing of your accounts and tax returns, ensuring 100% compliance.
Step 05
Ongoing Advisory
We provide a post-filing summary and advise on your payment deadlines to avoid HMRC interest charges.
FAQ
Statutory Audit Services: London & UK FAQ
When is the deadline for Corporation Tax in the UK?
Your Corporation Tax return (CT600) must be filed 12 months after the end of your accounting period. However, the deadline to pay your tax bill is usually 9 months and 1 day after the accounting period ends.
Do I need a London accountant if my business is outside the M25?
No, but many clients prefer a best-in-class service firm in London due to our experience with high-growth sectors and complex UK tax laws. We serve clients nationwide via secure digital platforms.
Can you help with R&D Tax Credits?
Yes. As part of our Corporation Tax accounting, we assess if your business qualifies for Research & Development tax relief, which can significantly reduce your tax liability or result in a cash refund.
What happens if I file my CT600 late?
HMRC issues automatic penalties starting at £100 for being just one day late. AcumenAGC ensures all our clients meet their deadlines to avoid unnecessary costs.
Do you offer HMRC compliant services for businesses outside London?
Absolutely. While we are a best tax investigation firm in London for small businesses, our cloud-based systems allow us to serve any UK-registered business or resident.
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.