Understanding CT600
A CT600 is the statutory form that UK limited companies and organisations must submit to HM Revenue & Customs (HMRC) to report taxable profits and calculate their corporation tax liability for each accounting period.
Every company registered in the UK must file a CT600 within 12 months of its accounting period end and pay any tax due within nine months and one day. Errors, omissions, or late submissions can trigger penalties, interest charges, and HMRC enquiries.
Accurate CT600 preparation requires a thorough understanding of UK tax legislation, allowable and disallowable expenses, capital allowances, loss reliefs, and HMRC disclosure requirements making it a task that demands specialist expertise.
From initial document collection through to supporting HMRC filing, Viaante delivers a fully managed CT600 preparation and corporation tax compliance service tailored to your business or accountancy practice.
End-to-end preparation of UK corporation tax returns, built on robust financial data and current HMRC guidance.
Comprehensive compliance management to ensure every return is accurate, complete, and submitted on time.
Thorough analytical review to identify errors, inefficiencies, and tax-saving opportunities within your records.
Proactive planning support to ensure your business structure and expenditure delivers the most efficient tax outcome.
Expert assistance when HMRC raises questions, requests information, or opens a formal enquiry into your tax affairs.
WHY VIAANTE
We combine deep UK payroll compliance knowledge with proven operational processes giving you a service you can rely on, month after month.
Our team holds specialist knowledge of HMRC RTI requirements, PAYE legislation, and statutory payment rules current and continuously updated.
Structured pre-submission checklists and dual-verification controls minimise errors before they reach HMRC.
ISO-aligned data handling protocols ensure employee payroll data is stored, transmitted, and accessed securely at all times.
Viaante’s pension administration team has established working experience with the UK’s major qualifying workplace pension providers and integrates directly with leading payroll software platforms ensuring a smooth, efficient flow of data from payroll to pension.
During your consultation, we can discuss:
I was reviewing some invoices and I noticed that the team was doing an excellent job of identifying multi-invoices. Of the 100 I looked at 34 needed to be rejected and all 34 were correctly rejected. Thank you for being on top of it! We didn’t realize the processors were going to be sending in multi-invoices so we were nervous about them getting missed. Just wanted to pass on the good news and thanks!
Team, I wanted to express our happiness that your teams have been doing a great job. 'Besides the team being more accurate overall – these are great audit numbers we have achieved lately. I can’t thank you enough for your hard work!
Thanks again for the great suggestion for everyone’s benefit. Your team always has such interesting, innovative suggestions to resolve these kinds of challenges. I appreciate every single day we work together and I’m so glad, too.
Many thanks! May I take this opportunity to thank the entire Team for their efforts and dedication at this most difficult time.
I have every respect for their commitment in normal times, and I have some experience of what it is like to be locked away at home and working and all the challenges that bring with both family life and also the isolation of being away from one’s colleagues. Great work Team Viaante!
Talk to a Viaante tax professional today. We will assess your requirements, explain our process, and provide a clear, no-obligation proposal for accurate, timely, and cost-effective CT600 support.