Are Accounts Submitted to HMRC with the CT600?

When you submit your CT600 through TinyTax, your company accounts are automatically included in the HMRC submission. You do not need to send accounts to HMRC separately.

How the HMRC CT600 Submission Works

HMRC requires accounts to accompany the CT600 for non-dormant companies. TinyTax packages your accounts in iXBRL (Inline XBRL) format and includes them in the same electronic submission as your CT600. From HMRCs perspective, they receive both documents together.

This is true regardless of which filing option you selected:

TinyTax Filing Option	What goes to HMRC	What goes to Companies House
CT600 and Accounts	CT600 + accounts	Accounts
CT600 only	CT600 + accounts	Nothing (you file CH separately)
Accounts only	Nothing	Accounts

The CT600 only option means TinyTax will not separately file accounts to Companies House — it does not mean accounts are excluded from the HMRC submission.

Common Scenario: Already Filed Accounts to Companies House

If you filed accounts to Companies House through another route (such as the government WebFiling service or an accountant), and then used TinyTax to file your CT600:

• Companies House: Already covered by your earlier filing
• HMRC: Covered by your TinyTax CT600 submission (accounts included automatically)

You do not need to take any further action.

Dormant Companies

Dormant companies are an exception: HMRC does not require accounts alongside the CT600 for dormant periods. TinyTax handles this automatically when you select the dormant company option.

Common Questions

How do I know if accounts were included in my HMRC submission?

If your CT600 status shows Accepted in your TinyTax dashboard, the full submission (CT600 + accounts) was accepted by HMRC. You can download your submitted documents from the dashboard to confirm what was included.

Do I need to file accounts to Companies House separately after using CT600 only mode?

Yes — if you chose CT600 only, you still need to file accounts to Companies House through another route (Companies House WebFiling, or accountant software). TinyTax's CT600 only option does not file to Companies House.