Compliance
CT600 preparation, computations and corporation tax payment planning for UK companies.
Regulated and qualified through ICAEW, ACCA and AAT memberships held across our team
Regulated by
Regulated & AML supervisor
AAT fellow member
Xero Gold PartnerCertified advisor
QuickBooks PartnerCertified ProAdvisor100+ yearsCombined team experienceFully insuredUp to £2m indemnityCT600 preparation, computations and corporation tax payment planning for UK companies. We work with technology, SaaS, e-commerce, marketplace and online businesses trading as UK limited companies, from first-year micro-entities in Croydon and Morden to funded teams in central London, with a fixed scope and fee agreed before anything starts.
Corporation tax computation from the statutory accounts
Capital allowances and expense review
CT600 filing with HMRC in iXBRL format
A clear note of what to pay and when
CT600 preparation, computations and corporation tax payment planning for UK companies.
• Corporation tax computation from the statutory accounts
• Capital allowances and expense review
• CT600 filing with HMRC in iXBRL format
• A clear note of what to pay and when
Corporation tax is charged at 19% on profits up to £50,000 and 25% above £250,000, with marginal relief tapering the rate in between. Associated companies split those limits, which catches directors who run more than one company.
The company tax return is due twelve months after the end of the accounting period, but payment is due earlier: nine months and one day after the period end. Filing early and paying on the due date is usually the practical answer, because it tells you the liability months before the cash is needed.
Thresholds, rates and deadlines quoted here reflect the 2026/27 UK position. Check current GOV.UK guidance, or ask us, before you rely on them for your own company.
We start by looking at the last filed accounts, your current records and your filing dates, then confirm a fixed scope and fee in writing.
Once the work is live you get reminders ahead of each deadline, a named person to ask questions, and a plain-English summary when the figures are ready, not a PDF with no explanation.
Frequently asked
19% if taxable profits are £50,000 or less. Between £50,000 and £250,000 marginal relief applies, and above £250,000 the rate is 25%. Associated companies reduce those bands.
Usually yes, through the annual investment allowance, which covers qualifying plant and machinery up to £1m a year. Cars follow separate rules based on CO2 emissions.
Keep bank statements, sales and platform reports, purchase invoices, payroll records, VAT workings, finance agreements and Companies House correspondence. We confirm the exact list at onboarding and identify gaps before a filing deadline becomes urgent.
The fee depends on transaction volume, record quality, VAT and payroll requirements, historic catch-up and the level of reporting needed. We agree a fixed scope and price before technical work starts, with published packages available on our fees page.
Yes. We request professional clearance, collect the prior records and authorities, check the next Companies House and HMRC deadlines, and give you one clear handover list. The process is normally completed remotely.
Yes. We work through secure cloud records, scheduled reviews and digital approvals, while keeping a named team available by phone, video call and email. Clients can also visit our Morden office by appointment.
We regularly work with Xero, QuickBooks, FreeAgent, Sage and connected sales or expense apps. The right setup depends on transaction volume, integrations and the reports you need, not simply the software brand.
The relevant calendar may include annual accounts, Corporation Tax payment and return dates, confirmation statements, VAT returns, payroll submissions and Self Assessment. We map the dates from your company year end and registrations.
Yes. You can ask a straightforward initial question without charge. Calculations, filings, written advice, planning and HMRC correspondence are scoped and quoted before work begins.
Google reviews
“We worked with a few different accountants before finally settling with Accotax, and we're really glad we did. They take the time to understand how our business works and what our needs are. Anum, who looks after our account on a day-to-day basis, including reconciling invoices and preparing the annual accounts, is amazing, professional, efficient, and follows the processes we have put in place together. Accotax has made our accounting experience much smoother and easier. We see them as a long-term partner as our business continues to grow. I would 100% recommend them.”
“I've been working with Accotax since January 2024, and their support has grown alongside my business needs. My personal allocated manager, Umer, provides tailored services for both of my companies, adapting as I expand and ensuring everything runs smoothly. They are responsive, knowledgeable, and always clear in their communication. Their help with accounts, VAT, payrolls, pensions and compliance gives me real confidence and peace of mind.”
“Accotax have been our accountants for many years now. We maintained them because of their professionalism. In the last couple of years I have been working with Imran, who has been very professional and helpful in guiding us through the whole process, explaining and clarifying every aspect of it. Very prompt in responding to questions and patient with us even when we seem to be slow.”
Included approach
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Share your next deadline, accounting problem or growth question. We will reply with a clear next step and quote any technical work before it begins.
Chat with ACCOTAX on WhatsAppPick a time that suits you and a qualified accountant will call you about your company, deadlines and fees.
Appointments run Monday to Friday, 9:00am to 5:30pm. Your confirmation is emailed straight away.
Four London offices
Work with us entirely online, or sit down with your accountant at whichever office suits you. Open Monday to Friday, 9:00am to 5:30pm. Office visits are by appointment only, so please book before coming in.
Free, no obligation
Pick a time that suits you and a qualified accountant will call you about your company, deadlines and fees.
Appointments run monday to friday, 9:00am to 5:30pm. Your confirmation is emailed straight away.
