Corporation Tax Services for UK Limited Companies
Most limited company directors do not have a problem with paying corporation tax. They have a problem with finding out what they owe two weeks before the bill is due.
We do it differently.
NDCA prepares and files corporation tax returns for UK limited companies of every size — from first-year start-ups with a single director to established companies turning over several million. We are ACCA-regulated, work primarily on Xero, and charge a fixed monthly fee so your CT600 is not a separate invoice, it is already paid for as part of your year-end.
Contact us today for a free consultation to walk through your situation.
What our corporation tax service covers
A dedicated accountant prepares your corporation tax return alongside your annual accounts. That includes:
- CT600 preparation and filing with HMRC
- Corporation tax computation built from your statutory accounts
- Capital allowances claim, including the Annual Investment Allowance
- Loss relief and group relief where applicable
- R&D tax relief signposting where you may qualify
- Director loan account review and section 455 tax check
- Dividend planning reviewed alongside the return
- Quarterly instalment payment scheduling for larger companies
- Corporation tax registration for newly incorporated companies
If you also need your statutory accounts filed or your director’s personal tax return prepared, we handle both as part of the same engagement. No duplicated work, no separate invoice.
How NDCA works
Three things make our corporation tax service different.
- Fixed monthly fee
Corporation tax is not a separate bill. It is built into the fixed monthly fee we agreed when you joined. You know exactly what you are paying twelve months in advance. - A real human, fast
A named accountant prepares your return and answers your questions. No ticket queue. Most queries get a same-day reply. - You know your tax bill months in advance
Most clients have their CT600 drafted months before it is due, not days before. That means you know your corporation tax bill in good time. There is time to plan, time to set the money aside, and time to take advice on anything you can do before submission.
Xero is the only platform we use
Xero is the only bookkeeping platform we run. For corporation tax, that matters more than it sounds.
A CT600 is only as accurate as the accounts it is built on. When your bookkeeping is in Xero and reconciled month by month, the corporation tax computation pulls straight out of figures you have already seen and signed off. There is no rebuild, no last-minute discovery of missing income, no reconciliation panic.
If you are not yet on Xero, we migrate you across as part of onboarding. If you are already there, we plug straight in.
Apron for invoice capture
Most corporation tax disputes start with missing paperwork — supplier invoices that never made it into the system, capital purchases coded as expenses, expenses the director paid personally and forgot to flag.
We use Apron to stop that. Snap a photo of a receipt or forward a supplier invoice to your dedicated Apron email address, and the supplier, date, amount, VAT and line items are pulled out automatically and pushed into Xero. By the time year-end arrives, the paperwork supporting every deduction on your CT600 is already in place.
For our clients, that means a corporation tax return that holds up if HMRC ever takes a closer look.
Who we work with
NDCA corporation tax clients fall into a few groups:
- First-year limited companies who have just incorporated
- Established companies looking for a fixed-fee accountant who handles everything
- Director-only companies where the corporation tax and self assessment need to tie up
- Property SPVs holding buy-to-let portfolios
- Trades and construction firms with CIS and corporation tax obligations
- E-commerce sellers, agencies, and service businesses scaling past their first hire
If your situation is not on the list, send us a message — it almost certainly fits.
Year-end coming up?
The corporation tax bill is due nine months and one day after year-end — but the smart move is to know what's owed long before that. Send us your details — we'll come back within one working day with a fixed monthly quote.
Reviews
Discover why businesses trust us for dependable accounting services and practical financial advice.
Switching from another accountant
If you already have an accountant and you are not happy, switching is simpler than people think. We send your current accountant a professional clearance letter, collect your records, and pick up where they left off. Most clients are fully on-boarded within two weeks.
You do not need to wait for year-end. You do not need an awkward phone call. We handle it.
Corporation tax FAQs
NDCA fees depend on the size and complexity of your company, the volume of transactions, and what else is bundled in (bookkeeping, payroll, annual accounts, director self assessment). You get a fixed monthly price upfront, not a separate corporation tax invoice. Get a quote on 01903 968618.
For most UK companies, corporation tax is due nine months and one day after the end of your accounting period. The CT600 return itself must be filed twelve months after year-end. We prepare both early so you know what is due well before the deadline. Larger companies with profits over £1.5 million pay by quarterly instalments instead.
From 1 April 2023, the main rate is 25% for profits over £250,000 and 19% for profits up to £50,000. Profits between those two thresholds are taxed at 25% with marginal relief, giving an effective rate between 19% and 25%. We calculate the right rate for your company as part of the computation.
The CT600 is the corporation tax return submitted to HMRC. It reports your taxable profit, the corporation tax due, and any reliefs claimed. It is filed online alongside your statutory accounts and tax computation.
Yes. Most companies can claim the Annual Investment Allowance on plant and machinery, plus structures and buildings allowance on qualifying property, and full expensing on new qualifying assets. We review every capital purchase as part of preparing the return.
Corporation tax is paid by the company on its profits. Self assessment is paid by individuals — including company directors — on the income they personally take from the company (salary, dividends, benefits, other personal income). Most directors need both, and we prepare them together so the figures match.
Yes. The CT600 must still be filed even if no tax is due. Losses can also be carried back, carried forward, or claimed against other group company profits — we cover all of that on the return.
We are remote first. We work with clients across the UK using Xero, so location does not matter.
Yes. Book one on 01903 968618 or via the contact form.
Corporation tax is due nine months and one day after your company's year-end. For example, a 31 March year-end means payment is due by 1 January the following year. The CT600 itself is due within 12 months of year-end — but the cash is due first. We file the return well before either deadline so you have time to plan for the bill.
A director's loan account tracks money you take from the company that isn't salary, dividends, or expenses. If the balance is owed by you to the company nine months and one day after year-end, HMRC charges a 33.75% additional tax (s455 charge) on the amount. We review the DLA before year-end so you can clear it, plan a dividend, or accept the charge knowingly — not get a surprise tax bill nine months later.
Yes. Multi-shareholder companies, group structures, and holding companies need careful coordination — dividend planning, loss relief, group relief, and tax timing across entities. We work with companies of every size, from single-director startups to multi-entity groups. If your structure is unusual, send us a message and we'll let you know whether we're the right fit.
Most accountants do CT600 work at year-end against records they haven't seen since the previous year. Because we run the bookkeeping monthly, when year-end arrives the figures are already correct and the CT600 is mostly drafted. You know what you owe months in advance. If your current setup works, no need to change. If you only find out the corporation tax bill weeks before it's due, we should talk.
Ready to hand over your corporation tax?
Most clients give us their records once at year-end and never think about it again. We file the CT600, manage HMRC correspondence, and tell you what you owe well before the bill is due. Send us a few details — we'll come back within one working day with a fixed monthly quote.
