Practical support from a London-based practice
Corporation Tax Support for Companies
A company's accounting profit does not always equal its taxable profit. Delakazzi helps companies understand the adjustments needed for Corporation Tax, using the accounts and supporting records. The tax period, calculations, return preparation and any submission work are agreed in writing.
Understand the movement from accounts to tax
Some costs recognised in the accounts receive different treatment for tax. We examine the relevant expense categories and transactions, identify items requiring further information and explain the main adjustments in the calculation. The business purpose and evidence behind an expense matter.
Consider assets, allowances and losses
Purchasing equipment, disposing of an asset or bringing forward a loss may affect the tax computation. We consider matters within the agreed assignment and request the evidence needed to assess applicable treatment. A possible relief is not treated as available merely because its name appears relevant.
Check the period and company circumstances
First accounts, changes of accounting date and connections with other companies can require additional attention. We establish the company's history and reporting periods before preparing the computation. Significant or unusual transactions should be raised early so their scope and treatment can be assessed.
Make the result understandable
We explain the prepared calculation and any outstanding information needed for approval. Where filing is included, submission follows the agreed client authorisation. Tax payment remains a separate responsibility unless expressly agreed otherwise; supplying a computation does not itself arrange payment.
What information will we need?
Start with a brief description of the organisation, the support required, the relevant period and any deadline. If we can take the matter forward, the records requested may include:
- Annual accounts and detailed ledgers
- prior tax returns and computations
- asset purchase and disposal records
- expense evidence
- loan details
- information about connected companies
- relevant HMRC correspondence
- supporting records for losses or proposed claims
Do not include confidential records, identity documents, bank information, passwords, detailed allegations or legally privileged material in the public form. We agree a secure method for documents after the relevant acceptance checks.
Important professional boundaries
The written engagement defines what is included.
Preparation, filing, payment and additional advisory work are separate responsibilities. Only the services expressly agreed are included. No tax saving, repayment or particular HMRC outcome is guaranteed.
We establish the records, scope, competence, capacity and deadlines before agreeing an engagement.
Receipt of an enquiry does not mean that Delakazzi has accepted the assignment or agreed to act. Work begins only under written engagement terms.
From first contact to useful work
How we work with you
- 01
Introductory conversation
Tell us the organisation, service, period and deadlines.
- 02
Review requirements
Establish record quality, existing advisers and the work needed.
- 03
Agree responsibilities
Confirm deliverables, fees, records and approvals in writing.
- 04
Prepare & review
Complete the agreed work and explain queries and approval steps.
Your questions
Corporation Tax: useful answers
Is Corporation Tax simply calculated on the profit in the accounts?
Not necessarily. Tax rules may require adjustments to accounting income and expenses. Relevant allowances, reliefs and losses also need to be considered on the facts.
Can you help if another accountant prepares our accounts?
We can consider a separately scoped tax assignment where suitable accounts and supporting information are available. Responsibilities for accounting changes and tax queries need to be clear between everyone involved.
Does this service cover an HMRC enquiry or specialist relief claim?
Those matters are not automatically included. Tell us about existing correspondence or a proposed claim at the outset so we can assess the work, competence and separate scope required.
Primary sources
Further guidance
- HMRC: Corporation Tax expenses
- HMRC: allowances and reliefs
- GOV.UK: first company accounts and returns
General information, not advice for a particular organisation. Guidance checked on 6 September 2026; the relevant jurisdiction and reporting period must be confirmed.
A considered next step
Let’s discuss the support you need.
Tell us the service you need, your organisation and any deadline. We will explain the next step and whether an initial review is appropriate.