UK Corporation Tax Compliance & CT600 Filing
We prepare robust Corporation Tax returns that withstand HMRC scrutiny while aggressively claiming every valid relief your business is owed.
What type of company?
Different rules apply to trading vs investment.
Select an option above to see our focus.
"HMRC's AI flags 'unusual' expenses instantly. A single incorrect claim can trigger a full-year audit."
The Detail Matters
Corporation Tax isn't just about paying 19% or 25%. It's about identifying exactly which expenses are "Wholly and Exclusively" for trade, and which are not.
HMRC Enquiries
HMRC computers compare your profit margins against industry averages. Outliers trigger automatic investigations.
Missed Capital Allowances
Depreciation is not tax-deductible. You must claim Capital Allowances instead. Most DIY returns miss "Full Expensing".
S455 Director Tax
If you owe your company money at year-end, the company pays a penalty tax of 33.75%.
Tax Filing, Precision Engineered
Profit Adjustment
We take your accounting profit and "add back" disallowable expenses (e.g., client entertaining, depreciation, fines) to reach "Taxable Profit".
Relief Mining
We scan for Capital Allowances (AIA, Full Expensing), R&D indicators, and loss carry-backs. We aim to legally reduce the taxable figure.
Computation Drafting
We prepare the full CT600 return and supporting computation tables. This shows HMRC exactly how we arrived at the final figure.
iXBRL Tagging
HMRC computers can't read PDFs. We convert your accounts into iXBRL (Inline eXtensible Business Reporting Language) code for automated submission.
Filing & Payment
We submit to HMRC. We provide you with the 17-character payment reference and confirm exactly when the tax is due (usually 9 months + 1 day).
What You Receive
CT600 Tax Return
The official statutory filing.
Tax Computation
Detailed 'Add-back' calculations.
Capital Allowance Schedule
Asset pool tracking & claims.
Payment Advice
Reference & date instructions.
Loss Memorandums
Tracking trading losses for future.
S455 Supplement
Director loan tax calculations.
The Perceptive Difference
Digital filing receipts provided instantly.
Get a ProposalChoose Your Service Level
Tax is not one-size-fits-all. Trading companies need relief maximisation; investment companies need careful expense management.
Trading Company
Best for: Active Business
Efficiency
For active companies. We focus on maximising Annual Investment Allowance (AIA) and ensuring all trading expenses are claimed correctly. Includes detailed computation review.
Holding Co / SPV
Best for: Property / Assets
Protection
For Family Investment Companies (FICs) or Property SPVs. Rules on expenses are stricter (expenses of management only). We ensure you don't claim trading deductions typically disallowed for investment companies.
Capital Allowances
The government offers generous reliefs for business investment. Most DIY returns miss these, leading to overpayment.
Annual Investment Allowance (AIA)
Deduct 100% of the cost of most plant and machinery (up to £1m) from your profits in the year of purchase.
Full Expensing
For larger companies, this offers 100% first-year relief on qualifying main rate plant and machinery investments with no upper cap.
Pricing Clarity
One-off annual fee or included in monthly packages. Includes pre-filing review.
Fixed Fees
Fixed Fees Apply
Annual Packages
Clear, fixed pricing based on the complexity of your company.
Simple CT600
Annual Fee
Contractors/Consultants with minimal assets.
- CT600 Preparation
- Basic Capital Allowances
- Submission to HMRC
Trading Company
Annual Fee
Standard business with staff & assets.
- Full Expense Review
- Super Deduction / AIA
- Loss Relief Claims
Group / Complex
Custom Quote
Multi-company groups or investment entities.
- Group Relief Surrender
- Investment Company Rules
- Research & Development
Common Questions
Corporation Tax must be paid 9 months and 1 day after your year-end. The tax return (CT600) itself must be filed within 12 months.
Yes, by claiming all valid expenses and capital allowances. However, spending £1 to save 25p in tax is not a strategy. We focus on tax efficiency, not just spending.
If you made a trading loss, you pay no Corporation Tax. You can carry the loss back to the previous year to get a refund, or carry it forward to offset future profits.
Yes. We can identify potential R&D activity during the accounts process. Full technical report writing is quoted separately as a specialist service.
