Corporation Tax Returns for UK Limited Companies
A limited company that receives a notice to deliver a Company Tax Return from HMRC must file one, even if it has made a loss or has no Corporation Tax to pay. Sterling Crest Accountants prepares the tax computation from the company's accounts, completes form CT600 and files it with HMRC after the directors approve the figures. The return is separate from the accounts filed with Companies House.
Sterling Crest Accountants provides this service to clients throughout the United Kingdom. Consultations are arranged in advance by telephone or online meeting. Our registered office is in Leeds, West Yorkshire.
About Corporation Tax Returns
Corporation tax starts with accounting profit adjusted for tax purposes. Add backs and deductions include depreciation versus capital allowances, disallowed expenses, and other entries required by tax law within routine company work.
We complete CT600 forms and supporting schedules for small and medium companies in typical trading situations. Associated company rules may affect marginal rates and we apply them when relevant company details are provided.
Reliefs and elections such as small pools writing down allowances are handled when applicable and documented. Research and development claims, group reliefs, reconstructions and consortium arrangements are not marketed as included without separate scope.
HMRC's own online service for filing company accounts and tax returns has closed, so returns are filed using commercial software. We submit through compatible software after you approve the figures. Routine HMRC acknowledgements and simple questions fall within normal correspondence where engaged.
Who this service is for
- UK private companies with trading or investment profits
- Owner managed companies we prepare accounts for
- Companies with straightforward capital allowance pools
- Newly incorporated companies after first accounts period
- Companies with losses that need to be recorded and carried forward
- Companies replacing a prior tax agent
Common challenges
- Accounts profit confused with taxable profit
- Capital additions not allocated to correct pools
- Associated company rate impact not modelled
- CT600 deadline missed after accounts approval delay
- Director loan accounts with no s455 planning notes where relevant
- Prior year losses not tracked forward correctly
What is included
- Tax computation from approved accounts figures
- Capital allowances analysis on qualifying spend
- CT600 preparation and validation checks
- Small repayments or liabilities scheduling note
- Associated company count review when details supplied
- Routine loss utilization within same company
- iXBRL accounts tagging linkage where we filed accounts
- Draft computation sent for director approval
- Electronic submission after approval
- Payment due date reminder from HMRC rules
- Routine HMRC letters for the accounting period in scope
How the service works
- 1.Receive final or draft statutory accounts
- 2.Prepare tax adjustments and allowance schedules
- 3.Draft CT600 and computation for review
- 4.Discuss questions with director contact
- 5.Obtain written approval to submit
- 6.File and confirm HMRC receipt
Documents normally required
- Statutory accounts or detailed trial balance
- Fixed asset register and invoices
- Loan agreements and interest schedules
- Prior year tax computation and losses schedule
- Details of associated companies if any
- R&D or grant income notes if applicable
- HMRC company authentication codes
UK compliance information
- R&D tax credit claims, group relief surrenders and major reorganisations need separate engagement.
- Formal enquiry defence is not included by default.
- We do not act as company director when filing CT600.
- Tax payment remains the company’s responsibility.
Key deadlines
The Company Tax Return is due 12 months after the end of the accounting period it covers. Corporation Tax itself is usually payable earlier, nine months and one day after the end of the accounting period, so the payment date normally comes first. Larger companies may need to pay in instalments.
Confirm official dates and rules on GOV.UK. Rules and thresholds can change.
What this work helps you maintain
- Computation tied to accounts we prepare or receive
- Capital allowances documented pool by pool
- Approval step before HMRC submission
- Clear payment timing note with filing
- Losses and allowances tracked from one year to the next
Related services
- Company AccountsStatutory accounts for UK limited companies, prepared for Companies House and company members, with clear year-end financial information and support throughout the accounts preparation process.
- BookkeepingStructured bookkeeping for sales, purchases, bank transactions and business records, helping maintain accurate financial information for VAT, payroll, accounts and tax reporting.
- Company FormationUK limited company formation through Companies House, with support for the incorporation information required to establish the company correctly from the outset.
- Tax Advisory & PlanningTax advice for companies and individuals on how allowances, reliefs and elections apply to your circumstances, ideally before decisions are made.
Frequently asked questions
The CT600 is HMRC's Company Tax Return form. It reports the company's taxable profits and the Corporation Tax due for an accounting period, and is filed with the company's accounts and tax computation.
The return is due 12 months after the end of the accounting period it covers. Late filing penalties apply if it is missed.
Not automatically. R&D claims need scoped technical and tax work if you want to claim.
We need reliable final figures. Draft accounts may suffice only if you confirm no material changes before filing.
Large company instalment rules apply above profit thresholds. Tell us if you expect to be in that regime.
Dormant accounts may still need corporation tax treatment. Scope depends on activity in the period.
Yes. If HMRC has sent a notice to deliver a Company Tax Return, it must be filed even where there is a loss or no tax to pay. Filing also records the loss so it can be used against future profits where the rules allow.
No. For most companies, tax is due nine months and one day after the end of the accounting period, while the return is due 12 months after the end of the accounting period it covers. Interest runs on tax paid late, even if the return is filed on time.
Discuss Corporation Tax Returns with Sterling Crest
Book a free consultation or send an enquiry. Scope and fees are confirmed in writing before any engagement begins.
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