Corporation Tax Return Preparation & Filing
We handle the complete preparation and accurate filing of your CT600 return with HMRC, ensuring full compliance and claiming all available reliefs to minimise your liability.
Maximising Your Company's Tax Efficiency?
Corporation tax is a significant cost for UK companies, but with expert planning and compliance, you can legally minimise your liability. MHC & CO provides comprehensive corporation tax services that ensure compliance while optimising your tax position.
Current Corporation Tax Rates
Small Profits Rate
Profits up to £50,000
Main rate for companies with profits under £50,000
Marginal Relief
Profits £50,001 - £250,000
Graduated rate between small profits and main rate
Main Rate
Profits over £250,000
Standard rate for companies with higher profits
💡 Associated companies share the £50,000 and £250,000 thresholds. We can advise on associated company rules and planning opportunities.
Critical Corporation Tax Deadlines
CT600 Filing
12 months after year-end
Corporation tax return (CT600) must be filed with HMRC.
Payment Deadline
9 months + 1 day after year-end
Corporation tax payment due to HMRC (for most companies).
Accounting Reference Date
Anniversary of incorporation
Your company's financial year-end date.
⏰ Large companies (profits over £1.5m) pay corporation tax in quarterly instalments. Missing deadlines leads to automatic penalties and interest.
Key Corporation Tax Reliefs & Allowances
Maximise your claims with these valuable reliefs:
Annual Investment Allowance (AIA)
£1,000,000 annual limit
100% first-year allowance on most plant and machinery.
Research & Development (R&D)
Up to 33% tax relief
Enhanced deduction for qualifying R&D expenditure.
Structures & Buildings Allowance (SBA)
3% annual allowance
For construction and renovation of commercial buildings.
Patent Box Regime
10% tax rate on patent income
Reduced rate on profits attributable to patents.
Creative Industry Reliefs
Enhanced deductions
For film, television, video games, and theatre productions.
Loss Relief
Flexible carry forward/back
Offset trading losses against other income or future profits.
Our Corporation Tax Process
Comprehensive approach ensuring compliance and optimisation:
1. Taxable Profit Calculation
We start with your accounting profit and make all necessary tax adjustments.
2. Relief & Allowance Maximisation
We identify all available reliefs, allowances, and deductions to minimise your tax liability.
3. CT600 Preparation
Preparation of your corporation tax return with full supporting computations.
4. Review & Approval
You review the computations and return before submission.
5. Filing & Payment
Electronic submission to HMRC and advice on tax payment timing.
6. Tax Planning for Next Year
Proactive planning to optimise your tax position for the coming year.
Late Filing & Payment Penalties
HMRC Penalty Structure for Late CT600 Returns
1 day late
£100 penalty
3 months late
Additional £100 penalty
6 months late
10% of unpaid tax estimate
12 months late
Another 10% of unpaid tax
Plus daily interest on late payments (currently 7.75%).
⚠️ Repeated late filing can trigger HMRC investigations and affect your company's credit rating.
Corporation Tax vs Other Business Taxes
| Tax Type | Who Pays | Current Rates | Filing Deadline |
|---|---|---|---|
| Corporation Tax | Limited companies | 19%-25% | 12 months after year-end |
| Income Tax | Individuals & sole traders | 20%-45% | 31 January following tax year |
| VAT | VAT-registered businesses | 20% (standard rate) | 1 month + 7 days after quarter |
| Business Rates | Business property occupiers | Varies by location | Instalments throughout year |
Why Choose MHC & CO for Corporation Tax?
Tax Savings Focus
We typically identify tax savings that exceed our fees, delivering immediate ROI.
Penalty Protection
We guarantee timely filing and payment, protecting you from HMRC penalties.
Strategic Planning
Proactive tax planning throughout the year, not just at filing time.
Relief Maximisation
Expert identification and claiming of all available reliefs and allowances.
Our Corporation Tax Services
⏰ Corporation Tax Deadline Approaching?
Late filing penalties start at £100 and increase rapidly. Don't risk penalties or HMRC investigations. Get professional help to meet your deadlines.
Urgent CT600 Assistance NeededOptimise Your Corporation Tax Position
Corporation tax is more than just compliance—it's an opportunity to structure your business for optimal tax efficiency. Let MHC & CO handle your corporation tax while you focus on growing your business.
Ready to Streamline Your Accounts?
Contact MHC & CO today and let our experts handle your Accounts.
MHC & Co.
Chartered Accountants
54 Gloucester Road
North,
Bristol
BS7 0SJ
Contact Us
Tel: +44 333 789 1010
Fax: +44 117 3737 449
Email: info@mhcandco.co.uk
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