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Two CT600s
I must submit 2 separate CT600 returns:
One for each accounting period HMRC notified me about.
🧾 Breakdown of the Two CT600s You Must File:
Period Deadline Why it's required
CT600 #1: 30 Jul 2024 – 29 Jul 2025 31 July 2026 Standard first-year return for the company (annual period)
CT600 #2: 30 Jul 2025 – 31 Jul 2025 31 July 2026 Catch-up for the 2-day overlap after end of accounting year
I don't have an option to submit the second one CT600 for HMRC and account for Companies House. Please let me know
One for each accounting period HMRC notified me about.
🧾 Breakdown of the Two CT600s You Must File:
Period Deadline Why it's required
CT600 #1: 30 Jul 2024 – 29 Jul 2025 31 July 2026 Standard first-year return for the company (annual period)
CT600 #2: 30 Jul 2025 – 31 Jul 2025 31 July 2026 Catch-up for the 2-day overlap after end of accounting year
I don't have an option to submit the second one CT600 for HMRC and account for Companies House. Please let me know
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Here’s how:
Go back to the submission form and search for your company again.
Change the filing type to “CT600 only” (don’t select “Both”).
Enter the stub period dates: 30/07/2025 – 31/07/2025.
Enter zero values for all financial fields (turnover, profit, etc.) assuming there was no activity in those two days / you'll include in next year's annual filing.
Submit to HMRC.
TinyTax will generate and file a valid CT600 for the 2-day period.
You don’t need to generate accounts since you’re using CT600-only mode.