Anewthing prepares your company’s Corporation Tax computation and return, reviews allowable expenses and reliefs, and explains the tax due and payment deadlines.
What’s included
- Corporation Tax computations and returns
- Advice on compliance and filing obligations
- Reviewing tax-efficient business structures
- Identifying reliefs, including sector-specific reliefs
- Reviewing expenses and operating costs for savings
- Planning relief on business acquisitions and disposals
- Representing your company in correspondence and enquiries with HMRC
How we work with you
Talk it through
Tell us what you need and how your records are kept.
Agree the scope and fee
You know what is included and what it costs before work begins.
Ongoing support
Deadlines and rule changes are raised with you before they become urgent.
Current rules at a glance
| Main rate | 25% on taxable profits over £250,000 |
|---|---|
| Small profits rate | 19% on profits of £50,000 or less, with marginal relief between £50,000 and £250,000 (limits reduced for short periods and associated companies) |
| Payment | Usually 9 months and 1 day after the accounting period ends. Larger companies may pay by instalments; thresholds depend on associated companies and accounting-period length. |
| Company Tax Return | 12 months after the accounting period ends |
Checked against GOV.UK on 26 September 2026. Rules change, confirm your own position before acting. Sources: Rates for Corporation Tax, Pay your Corporation Tax bill, Company Tax Returns.
Common questions
What is the difference between the filing and payment deadlines?
For most companies, Corporation Tax is payable nine months and one day after the end of the accounting period, while the return itself is due twelve months after the period ends. Large companies pay in instalments.
Can you take over from my current accountant?
Yes. The FAQs page explains how a change of accountant usually works, including professional clearance and authorising Anewthing as your agent with HMRC.