Corporate Tax Filing Made Simple: Accurate, Timely, and Compliant
Filing your corporate taxes doesn’t need to be stressful. At Audit Consulting Group, we help UK companies — from startups to established limited companies — file their corp tax filing accurately and on time. Our team of qualified accountants and tax experts takes care of everything, so you can focus on running your business.
What Is Corporate Tax Filing?
Corporate tax filing, also known as corp tax filing, is the process of submitting your company’s tax return to HMRC, declaring profits, allowable expenses, and calculating Corporation Tax owed. In the UK, most businesses are required to file a company income tax form (CT600) each year.
This process involves more than just filling out a form. It includes:
- Preparing annual accounts
- Calculating Corporation Tax
- Claiming allowances and reliefs
- Submitting your corporate tax forms to HMRC
- Ensuring accuracy and legal compliance
Mistakes can lead to penalties, overpayments, or HMRC investigations — that’s where we come in.
Who Needs to File a Company Income Tax Form?
All limited companies operating in the UK must:
- Register for Corporation Tax
- Keep accurate accounting records
- File annual accounts with Companies House
- Submit a company income tax form (CT600) to HMRC
- Pay Corporation Tax within 9 months and 1 day after the end of the accounting period
This includes:
- Ltd companies
- Dormant companies
- Foreign companies with a UK branch
- Clubs, societies, and associations with profits
Our Corporate Tax Filing Services
We provide a complete solution for corp tax filing:
- Preparation and submission of the CT600
- Corporation Tax calculations and payment reminders
- Preparation of annual statutory accounts
- Capital allowance and reliefs review
- Claiming R&D tax credits, where applicable
- Assistance with group relief and loss carrybacks
- Review of director salary vs. dividends for optimal tax position
- Liaison with HMRC on your behalf
- Support during audits or compliance checks
We don’t just “tick the boxes” — we look for opportunities to reduce your tax liability and future-proof your business.
Why Audit Consulting Group?
- Experienced in UK tax law and compliance
- Qualified accountants and chartered tax advisers
- Transparent fixed-fee pricing
- Customised service tailored to your business structure
- Trusted by hundreds of UK SMEs and contractors
- Specialists in limited company and group structures
- Support for both manual and digital bookkeeping
We don’t just fill out corporate tax forms — we become your tax partner.
Deadlines and Penalties – What You Need to Know
Missing your Corporation Tax deadline can be costly:
- Late Filing Penalties
- Up to 1 month: £100
- More than 3 months: Another £100
- Persistent lateness: Up to £1,000 or more
- Interest on Late Payments
HMRC charges interest daily on unpaid tax. - HMRC Investigations
Inconsistent or incorrect tax filings can trigger audits.
Our clients avoid these problems completely — we ensure full compliance and submit everything before the deadline.
Digital Tax Filing – Making Tax Digital (MTD)
While MTD currently applies to VAT, it’s expected to include Corporation Tax in the near future. We are already preparing clients for a fully digital tax world by offering:
- MTD-compliant accounting systems
- Cloud-based bookkeeping support (Xero, QuickBooks, etc.)
- Real-time tax forecasting
- Digital document management and storage
Whether you’re using spreadsheets or software, we can integrate with your current system or help you upgrade.
How Our Corp Tax Filing Process Works
- Initial Consultation
We assess your company structure, trading history, and compliance status. - Data Collection & Review
We gather financials, including turnover, expenses, assets, and director income. - Preparation of Corporate Tax Forms
We prepare and check all figures in your CT600 and associated accounts. - Review & Sign-Off
You’ll get a draft copy for approval before we file. - Submission to HMRC
We submit your tax return electronically and confirm receipt. - Post-Filing Support
We track payment deadlines and advise on ways to reduce your future tax.
Avoid Overpaying Corporation Tax
Did you know many UK businesses overpay because they:
- Miss allowable expenses
- Don’t claim capital allowances
- Misclassify income
- Underutilise director pension contributions
- Overlook loss reliefs or group structures
- Misreport dividends and loans
Our team identifies every opportunity to save and ensures your company income tax form reflects the best possible position.
Real Results: A Case Study
A London-based e-commerce business came to us frustrated with high Corporation Tax bills. We:
- Reviewed prior-year filings
- Reclassified certain marketing expenses
- Claimed capital allowances on newly purchased equipment
- Identified underclaimed R&D activities
- Updated director’s payroll strategy
Total tax saved over two years: £45,000
Future position: automated reporting and tax forecasts with cloud integration
Common Corporate Tax Filing Challenges
- Late submission
- Misreporting income
- Not understanding allowable expenses
- Ignoring tax-saving opportunities
- Filing incorrect CT600 attachments
- Using outdated software or manual systems
We’ve seen it all and resolved it all — from startups to complex group companies.
Tools We Use
We work with all major accounting platforms:
- Xero
- QuickBooks
- Sage
- FreeAgent
- Excel/manual bookkeeping (we’ll help you upgrade)
Don’t worry if your accounts are messy or incomplete — we’ll sort it.
Support Beyond Filing
We don’t disappear after filing. Our team is here year-round for:
- Corporation Tax planning
- Bookkeeping and accounting support
- Business growth consultations
- Shareholder strategy and dividend planning
- VAT and PAYE compliance
FAQ – Corporate Tax Filing Explained
What is CT600?
CT600 is the form used to file Corporation Tax returns in the UK. It declares profits, tax owed, and details of allowances and reliefs claimed.
How often do I need to file a company income tax form?
Annually. Most UK companies have one CT600 filing per year, due 12 months after the end of the accounting period. Payment is due earlier — 9 months and 1 day after period end.
Can I file CT600 myself?
You can — but it’s risky without expertise. Errors can lead to penalties or missed savings. Most companies use a qualified tax adviser like Audit Consulting Group.
What records do I need to keep?
Invoices, receipts, bank statements, payroll records, contracts, and director/shareholder documentation. We’ll guide you on how to organise and digitise these.
Do you help with late or missed filings?
Yes. We regularly help businesses file overdue CT600s, reduce penalties, and get back on track with HMRC.
Can you file CT600 if I use QuickBooks or Xero?
Absolutely. We work with cloud platforms daily and can export directly into HMRC-compatible formats.
What if my company didn’t trade this year?
You still need to file — we’ll help you prepare a ‘dormant’ return if needed.
What does it cost to file corporate tax?
We offer transparent, fixed-fee packages based on your company size and complexity. Prices start from £295 + VAT for a basic filing.
Testimonials from Our Clients
“Audit Consulting Group made tax filing completely painless. Their team spotted errors from previous years and got us a refund.”
— Alex J., Sheffield
“We thought we were on top of things, but Audit Consulting Group helped us cut our tax by over £12k. Professional and easy to work with.”
— Priya N., Manchester
“It’s hard to find an accountant that truly cares. These guys do. Every form, every deadline — covered.”
— Jacob R., Edinburgh
Industries We Support
- Construction and Engineering
- Digital and Creative Agencies
- Retail and e-Commerce
- Hospitality and Food Businesses
- Professional Services (Legal, Marketing, Finance)
- Contractors and Freelancers
- Property Management Companies
- Startups and Growing Ltd Companies
Starting From Scratch? We Can Help
Just launched your company and unsure how to file your first corporate tax forms? No problem. We’ll help you:
- Register for Corporation Tax
- Understand your accounting deadlines
- Choose your first accounting period
- Get set up with bookkeeping tools
- File your first set of accounts and CT600
We make compliance simple, even if you’ve never filed before.
Looking for Local Tax Experts?
Searching for corp tax filing or business tax support near me? Audit Consulting Group serves clients across the UK — in person and online. From London to Leeds, from Glasgow to Brighton — we’re your local partner with national expertise.
Book a Free Corporate Tax Consultation
Not sure where to start? Let’s chat.
- ✅ CT600 and annual accounts filing
- ✅ Strategic Corporation Tax advice
- ✅ R&D, Capital Allowances, Reliefs
- ✅ Bookkeeping support if needed
We’ll assess your business, identify tax savings, and manage your filing — start to finish.
Audit Consulting Group – Helping UK Businesses File, Save, and Grow with Confidence
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