Last updated Sep 16, 2026 and written by Menaka Gujral

Forming A Dormant Company – Don’t Be Fooled

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Nothing about the formation process itself. Forming a dormant company works exactly like forming a trading one, you still need a name, a director, and a shareholder. What changes is what happens afterwards.

Key Takeaways

  • The formation process for a dormant company is identical to a trading one.
  • After incorporation, you write to HMRC to let them know you're not trading yet.
  • Your SIC code for a dormant company is 99999.
  • You still file a Confirmation Statement every year, and Dormant Company Accounts rather than standard accounts.

What Do I Need to Do After Forming a Dormant Company?

Once incorporated, write to HMRC to tell them you don't expect to start trading soon. If you do start trading later, notify HMRC within 3 months of your first accounting period beginning.

You'll also still file a Confirmation Statement every year, the same as any company, using SIC code 99999 to reflect your dormant status. Alongside this, you'll file Dormant Company Accounts rather than standard accounts, a simplified version confirming there's been no significant financial activity. Your first set is due 21 months after incorporation, and yearly after that. Missing either deadline brings an automatic fine, so it's worth noting your dates properly.

For the fuller picture, including current fees and what's changed with dormant company compliance recently, our main guide to registering a dormant company covers it all.

Click here for our Company Registration Packages
Click here for our Annual Return Service
Click here for our Dormant Company Accounts

FAQs

Is forming a dormant company different from forming a trading one?

No, the formation process itself is identical. The difference is entirely in what you file afterwards.

What SIC code should I use for a dormant company?

99999.

Do I still need to file a Confirmation Statement if my company is dormant?

Yes, every year, the same as any company.

This article is for general information only and does not constitute legal or tax advice. For the fuller picture, see our main guide to registering a dormant company.