CORPORATION TAX SUPPORT FOR UK COMPANIES
Corporation Tax Services for UK Limited Companies
Clear and reliable Corporation Tax calculations, CT600 preparation and HMRC filing for small UK limited companies.
We help you understand your company’s tax position, meet the correct deadlines and submit an accurate Company Tax Return.
Accurate calculations • Clear deadlines • HMRC filing
WHAT WE CAN HELP WITH
Corporation Tax Support You Can Rely On
We provide practical Corporation Tax support for UK limited companies, from reviewing taxable profits and allowable expenses to preparing the CT600 return and submitting it to HMRC.
Corporation Tax Calculations
We review the company’s accounts, identify the relevant tax adjustments and calculate the taxable profit or loss for the accounting period.
CT600 Preparation and Filing
We prepare the Company Tax Return, supporting tax computation and required information for electronic submission to HMRC.
Allowable Expense Review
We review business expenses and identify costs that may be deductible, require adjustment or need different tax treatment.
Payment and Deadline Guidance
We confirm the Corporation Tax liability, payment deadline, filing date and the reference needed to make the payment correctly.
What Our Corporation Tax Service Includes
Preparing an accurate Company Tax Return involves more than entering figures into a form. We review the company’s accounts, supporting records and relevant transactions before calculating the final Corporation Tax position.
Our work may include adjustments for allowable and non-deductible expenses, capital allowances, company losses, director transactions and other relevant tax matters.
Tax-Adjusted Profit
We review the accounting profit and apply the relevant tax adjustments to calculate the company’s taxable profit or loss.
Capital Allowances
We consider qualifying equipment, computers, machinery and other business assets when preparing the tax computation.
Company Losses
We review available trading losses and consider whether they may be carried forward, carried back or used against qualifying profits.
Director Transactions
We review relevant director expenses, benefits and director’s loan account transactions that may affect the tax position.
Reliefs and Deductions
We identify qualifying deductions, allowances and reliefs supported by the company’s records and circumstances.
Payment Information
We confirm the tax liability, payment deadline and Corporation Tax reference required for the company’s payment.
From Accounting Profit to Taxable Profit
The profit shown in the company’s accounts is reviewed and adjusted before the final Corporation Tax liability is calculated.
What Is Corporation Tax?
Corporation Tax is a tax paid by companies and certain other organisations on the taxable profits they make during an accounting period.
For a UK limited company, taxable profits may include income from trading activities, investments, property and chargeable gains arising from the sale or disposal of company assets.
Corporation Tax may apply to profits from:
- Trading activities
- Investments and interest
- Rental and property income
- The sale or disposal of company assets
- Other taxable company income
The company is responsible for keeping appropriate accounting records, calculating the Corporation Tax due, paying the liability and filing the required Company Tax Return.
Lugira Accounting can help you understand how these rules apply to your company and prepare the supporting accounts, Corporation Tax computation and CT600 return.
Understand Your Corporation Tax Position and Deadlines
The Corporation Tax rate and relevant deadlines depend on your company’s taxable profits, accounting period and individual circumstances.
The following rates generally apply to companies with a 12-month accounting period and no associated companies.
Small Profits Rate
Generally applies where taxable profits are £50,000 or less.
The applicable rate remains subject to the company’s individual circumstances.
Marginal Relief
Marginal Relief may reduce the amount payable where taxable profits fall between the lower and upper profit limits.
The effective Corporation Tax rate increases gradually within this profit range.
Main Corporation Tax Rate
Generally applies where taxable profits exceed £250,000.
Different rules and payment arrangements may apply to certain companies and activities.
Corporation Tax Deadlines
The Corporation Tax payment deadline is normally earlier than the deadline for filing the Company Tax Return.
For many small companies, Corporation Tax is normally due nine months and one day after the end of the accounting period.
The CT600 Company Tax Return is normally due 12 months after the end of the accounting period it covers.
If a company’s accounting period ends on 31 March 2027, its Corporation Tax would normally be due by 1 January 2028, while its Company Tax Return would normally be due by 31 March 2028.
We confirm the relevant payment and filing dates as part of our Corporation Tax service, helping you plan the company’s cash flow and avoid missed deadlines.
Allowable Expenses and Corporation Tax Adjustments
The profit shown in your company’s annual accounts is the starting point for the Corporation Tax calculation, but it is not always the amount on which Corporation Tax is charged.
Before calculating the final taxable profit or loss, the accounting result may need to be adjusted for expenses, capital expenditure, allowances, losses and other tax-related items.
Expenses That May Be Deductible
A company may generally deduct qualifying revenue expenses incurred for its business when calculating taxable profit.
- Employee salaries and employer costs
- Office rent and business premises costs
- Accountancy and professional fees
- Software and business subscriptions
- Advertising and marketing
- Business insurance
- Telephone and internet costs
- Business travel and accommodation
- Bank and payment processing charges
- Stock, materials and subcontractor costs
Common Corporation Tax Adjustments
Some costs recorded in the company accounts may need to be added back or treated differently when preparing the Corporation Tax computation.
Depreciation
Accounting depreciation is normally added back, while qualifying assets may instead receive capital allowances.
Business Entertaining
Client entertaining and certain hospitality costs may not be deductible for Corporation Tax.
Fines and Penalties
Certain fines and penalties recorded in the accounts may need to be disallowed.
Private or Non-Business Costs
Personal expenditure and costs without a sufficient business purpose may not be deductible.
Capital Expenditure
The cost of equipment and other assets may require capital allowance treatment rather than an ordinary expense deduction.
Losses and Reliefs
Available losses, allowances and qualifying reliefs may reduce the company’s taxable profits.
The final calculation depends on the company’s records, activities and circumstances. We review the relevant transactions and prepare a supporting Corporation Tax computation before submitting the CT600 return.
What Is Included in a Company Tax Return?
A Company Tax Return is more than the CT600 form alone. The submission normally combines the company’s tax return, annual accounts and supporting Corporation Tax computation.
The figures should be consistent with the company’s accounting records and clearly show how the final Corporation Tax liability has been calculated.
CT600 Company Tax Return
The CT600 reports the company’s income, taxable profits, losses, reliefs, allowances and final Corporation Tax position for the accounting period.
Statutory Company Accounts
The relevant company accounts are submitted with the return and provide the accounting figures used as the starting point for the tax calculation.
Corporation Tax Computation
The tax computation explains how the accounting profit or loss has been adjusted to arrive at the taxable profit and final Corporation Tax liability.
Supplementary Information
Additional pages or supporting information may be required where the company has particular transactions, claims, reliefs or circumstances.
Accounts and Corporation Tax Should Agree
The CT600, company accounts and supporting tax computation should be prepared as one connected set of documents. Differences between the accounting records, annual accounts and tax return should be identified and explained before submission.
Where Lugira Accounting prepares both the annual accounts and Corporation Tax return, the work can be completed as one coordinated year-end process.
Who We Help
Our Corporation Tax services are designed for small UK limited companies that need clear, accurate and practical year-end support.
We adapt the work to your company’s activities, accounting records and level of complexity.
Small Limited Companies
Corporation Tax calculations and CT600 filing for owner-managed, family-run and other small UK limited companies.
Contractors and Consultants
Year-end tax support for consultants, contractors and professional service businesses operating through a limited company.
Online and Retail Businesses
Corporation Tax services for online shops, e-commerce businesses, independent retailers and product-based companies.
Property and Service Companies
Support for property-related companies and businesses providing professional, operational or specialist services.
New Limited Companies
Guidance for companies approaching their first year end or preparing their first Company Tax Return.
Growing Businesses
Structured tax support for companies with increasing turnover, additional staff, new assets or more complex transactions.
Not Sure What Your Company Needs?
We can review your company’s filing position, accounting records and year-end requirements before confirming the work involved.
How Our Corporation Tax Service Works
We follow a structured year-end process to review your company’s records, calculate the Corporation Tax position and prepare the required submission to HMRC.
You will have the opportunity to review the figures and ask questions before the Company Tax Return is filed.
Initial Review
We discuss the company’s activities, accounting period, filing position and the current condition of its accounting records.
Records and Accounts Review
We review the annual accounts, bookkeeping records and supporting information needed for the Corporation Tax calculation.
Tax Adjustments
We identify allowable expenses, non-deductible costs, capital allowances, losses and other relevant tax adjustments.
Corporation Tax Calculation
We calculate the company’s taxable profit or loss and determine the resulting Corporation Tax liability.
Client Review and Approval
We explain the result and provide the relevant figures for your review before the return is submitted.
HMRC Filing
Once approved, the CT600, company accounts and supporting Corporation Tax computation are submitted electronically to HMRC.
Payment Information
We confirm the amount payable, the relevant deadline and the payment reference required for the company’s Corporation Tax payment.
Ready to Start Your Corporation Tax Return?
Contact Lugira Accounting to discuss your company’s year end, records and filing requirements.
Why Choose Lugira Accounting?
We provide careful, practical and personal Corporation Tax support for small UK limited companies.
Our aim is to make the year-end process clear, organised and easier to manage.
Careful Tax Calculations
We review the accounting figures and relevant tax adjustments before preparing the final Corporation Tax computation.
Coordinated Year-End Support
Corporation Tax can be prepared alongside the company’s annual accounts, helping to improve consistency and reduce duplicated work.
Clear Explanations
We explain how the taxable profit and final Corporation Tax liability have been calculated in clear and understandable terms.
Support for Small Businesses
Our service is designed around the practical needs of small limited companies, owner-managed businesses and their directors.
Reliable Deadline Guidance
We identify the relevant filing and payment dates and help you prepare for them in advance.
Personal Service
You receive direct and professional support tailored to your company’s records, activities and circumstances.
Corporation Tax Support That Fits Your Business
Whether you need help with your first Company Tax Return, an established company’s annual filing or an overdue Corporation Tax position, we can guide you through the next steps.
Frequently Asked Questions
Find answers to common questions about Corporation Tax, CT600 filing, allowable expenses, deadlines and company losses.
Does every limited company have to pay Corporation Tax?
A company will normally pay Corporation Tax when it has taxable profits. A company that has made a loss or has no taxable profit may have no Corporation Tax to pay, although it may still have filing or notification responsibilities.
When is Corporation Tax due?
For many small companies, Corporation Tax is normally payable nine months and one day after the end of the accounting period. Different rules may apply to larger companies required to make instalment payments.
When must a Company Tax Return be filed?
A Company Tax Return is normally due 12 months after the end of the accounting period. The filing deadline is therefore usually later than the Corporation Tax payment deadline.
What is a CT600?
The CT600 is the main form used to submit a Company Tax Return to HMRC. It reports the company’s income, taxable profits, losses, reliefs, allowances and Corporation Tax position.
Are all company expenses deductible?
No. An expense appearing in the company accounts is not automatically deductible for Corporation Tax. Its treatment depends on the nature and purpose of the expense and the relevant tax rules.
Can a company claim the cost of equipment?
Qualifying equipment and other business assets may be eligible for capital allowances. The available treatment depends on the type of asset, how it is used and the circumstances of the purchase.
What happens if my company makes a loss?
A qualifying company loss may be carried forward, carried back or used against other qualifying profits, depending on the type of loss and the company’s circumstances.
Does a dormant company need to file a Corporation Tax Return?
A dormant company will not normally have Corporation Tax to pay, but it may need to notify HMRC that it is dormant. If HMRC has issued a notice requiring a return, the company should not ignore it.
Is the Corporation Tax deadline the same as the Companies House deadline?
No. The Companies House accounts deadline, Corporation Tax payment deadline and Company Tax Return filing deadline are separate and should be checked independently.
Can you prepare annual accounts and Corporation Tax together?
Yes. Lugira Accounting can prepare the annual accounts, Corporation Tax computation and CT600 return as one coordinated year-end service.
Still Have a Corporation Tax Question?
Contact Lugira Accounting to discuss your company’s accounting period, records and filing requirements.
Get Clear and Reliable Corporation Tax Support
Accurate Corporation Tax work requires more than completing a form. Your company’s accounts, expenses, assets, losses and other relevant transactions need to be reviewed before the taxable profit and final liability can be calculated.
Lugira Accounting provides practical Corporation Tax support for small UK limited companies, including tax calculations, CT600 preparation, HMRC filing and payment guidance.
Whether you are preparing your first Company Tax Return, dealing with an established annual filing or bringing an overdue position up to date, we can help you understand the next steps.
- Corporation Tax calculations
- CT600 preparation and HMRC filing
- Clear payment and deadline guidance