CT600 Corporation Tax Return
Corporation Tax compliance sits at the centre of every UK limited company obligation. Our chartered team prepares, validates, and submits your CT600 return with full iXBRL tagging — ensuring your tax liability is calculated accurately and filed before HMRC statutory cut-offs.
Who Must File a CT600 Corporation Tax Return?
Every active UK private limited company (Ltd), including dormant entities with no trading activity, must file a CT600 return with HMRC for each accounting period. Company directors, finance controllers, and group subsidiaries with UK incorporation all carry this obligation regardless of profit levels. Trading companies, property investment SPVs, and consultancy firms with retained earnings routinely require annual CT600 submissions alongside their Companies House accounts.
Our CT600 Processing Methodology
We begin by reconciling your year-end trial balance against Xero, QuickBooks, or Sage ledgers, then apply capital allowance schedules, disallowable expense adjustments, and group relief claims where applicable. Our practitioners compute the chargeable profits figure, apply the prevailing Corporation Tax rate, generate the iXBRL-tagged CT600 XML package, and submit electronically via HMRC-compatible software with a full audit trail retained for your records.
Corporation Tax Deadlines & Payment Timelines
Corporation Tax must be paid to HMRC within 9 months and 1 day of your accounting period end. The CT600 return itself must be filed within 12 months of the same date. Late filing triggers automatic penalties starting at £100, escalating to £500 for returns over 12 months late. We maintain rolling compliance calendars and issue payment reminders 90, 60, and 30 days ahead of each statutory deadline.
Paying Too Much Tax? Let Our Dedicated UK Accountants Handle It.
From Year-End Accounts to Strategic Tax Planning, our chartered UK accountants maximise take-home pay and ensure 100% HMRC compliance.
- Certified UK Experts
- 100% Accurate & HMRC Compliant
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