Corporation Tax
CT600s, marginal relief and payment planning for limited companies.
Is this you?
Who this is for
- You run a limited company of any size
- You're unsure whether the 19%, 25% or marginal rate applies to you
- You want to plan payments instead of being surprised by them
- Your last accountant filed the CT600 and told you nothing else
What's included
Handled end to end
- Corporation Tax computation and CT600 prepared and filed
- Marginal relief calculated where profits fall between £50,000 and £250,000
- Capital allowances and R&D-eligible costs identified
- Payment reminders well before the 9-months-and-1-day deadline
- Director remuneration planned alongside the company position
- HMRC correspondence handled for you
How it works
Three steps, then it's off your desk.
Year-end review
We review the accounts and flag every allowance before computing the liability.
You approve the numbers
Clear summary: profit, rate applied, relief claimed, tax due, and when.
We file and diarise
CT600 filed, payment date diarised, reminders sent so nothing slips.
Deadlines & rates
Corporation Tax is due 9 months and 1 day after your accounting period ends; the CT600 return is due 12 months after. Rates: 19% on profits up to £50,000, 25% above £250,000, with marginal relief tapering between the two. Late filing starts at £100 and escalates; late payment accrues daily interest.
Common questions
Corporation Tax, answered.
If your profits fall between £50,000 and £250,000, you pay an effective rate between 19% and 25% on a sliding scale. The band is also divided by the number of associated companies — which catches many owners out. We calculate it precisely.
Usually a blend, reviewed yearly against current thresholds. We plan this with your Corporation Tax position, not in isolation.
Yes, the CT600 is still due. Losses can be carried back for a refund or carried forward — filing properly is how you bank that value.
Yes. We handle the professional handover directly with your previous accountant — you sign one authority form.
Often paired with
Related services
Talk to us about corporation tax.
Your first consultation is free — no obligation, and a fixed fee quoted before anything starts.