Corporation tax
Corporation Tax Accountants UK
CT600 corporation tax returns, computations and deadline management for UK limited companies — fixed fees, director review included.
- CT600 filing
- Computations
- Fixed fees
- HMRC authorised
Corporation tax returns (CT600), computations and planning for UK limited companies. Fixed fees from ProKeeper.
Sound familiar?
Corporation tax pain points
Deadline pressure
Nine months after year-end for the return — we plan backwards so you’re not scrambling.
Adjustments you don’t understand
We explain capital allowances, disallowables and what the tax bill actually means.
Accounts and CT out of sync
We prepare accounts and CT600 together so figures match.
Included
What’s included
CT600 return
Corporation Tax Return prepared and filed with HMRC.
Tax computations
Clear computations supporting the return.
Accounts alignment
Works with your statutory accounts (we can prepare both).
Director review
Plain-English walkthrough before submission.
Payment timing notes
When corporation tax is due and what to set aside.
Planning pointers
Practical notes for the next year where rules allow.
Who it’s for
Ideal for
- Owner-managed limited companies
- Contractors via PSC
- Companies switching accountants mid-cycle
- Directors who want CT and accounts in one place
Process
How it works
- 1. Scope & quote Year-end, records quality and fixed fee.
- 2. Information list Clear checklist of what we need.
- 3. Draft & review You see tax and accounts before filing.
- 4. File with HMRC CT600 submitted; confirmations shared.
Pricing
Corporation tax pricing
CT600 preparation typically starts from £350 for a straightforward small company when accounts are already clean. Combined annual accounts + corporation tax packages are quoted as one fixed fee so you’re not paying twice for overlapping work.
Example
Worked example
A contractor PSC had paid corporation tax on estimated profits without capital allowances. We rebuilt the computation, claimed the allowances due, filed the CT600, and set a monthly reserve so the next payment wasn’t a cash shock.
Need your CT600 handled?
Book a free consultation — fixed fee confirmed before we start.
FAQ
Common questions
Is corporation tax the same as annual accounts?
No. Accounts go to Companies House; the CT600 and tax computation go to HMRC. See our annual accounts service for the Companies House side — we often prepare both together.
When is corporation tax due?
Usually nine months and one day after the accounting period ends for the payment — we’ll confirm dates for your year-end.
Can you help if I’m already late?
Contact us immediately. We prioritise overdue filings and help you get compliant as fast as records allow.
Do you file iXBRL accounts with HMRC?
Where required for the company tax return process, we use the correct electronic formats. Statutory accounts filing at Companies House is covered under annual accounts.
Can you advise on salary vs dividends before year-end?
Yes — within the scope of your engagement. Start with our director salary guide, then book a consultation for numbers specific to you.
What records do you need for CT600?
Usually a complete trial balance, fixed asset details, director loan movements and prior-year computations. We’ll send a checklist.
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