Dormant company tax return
Updated on: April 23, 2026
Written by: Clark Stott
Reviewed by: Grace Lorraine Angeles
In this article
A dormant company has no significant financial activity during the year, meaning no trading, income, or meaningful transactions. Limited items, such as Companies House fees, may be allowed, but most activity will disqualify the company from dormant status.
“Dormant” can differ depending on the filing context, including how HM Revenue & Customs and Companies House define it. “No profit” doesn’t mean dormant; even small transactions can count as activity.
Do you need to file as a US expat?
No. If your company is dormant and HM Revenue & Customs recognizes it as such, you generally do not need to file a Corporation Tax return. However, you must still file accounts with Companies House.
For US expats, reporting depends on entity classification and filing status. A dormant company does not automatically remove US obligations. For example, some foreign corporations may still be required to file Form 5471, while others may not.
The UK and the US treat dormant companies differently. The UK focuses on whether the company is active. The US, however, looks at ownership, entity classification, control, and filing category to determine reporting obligations.
Do dormant companies need to file a tax return?
A dormant company usually does not need to file a Corporation Tax return unless HMRC issues a notice to file. This depends on what HMRC has on record, so if your company has not been marked as dormant, you may still be required to submit a return.
Dormant company filing checklist for US expats
- Confirm dormancy status with HM Revenue & Customs
- Check if HMRC issued a notice to file
- File accounts and a confirmation statement with Companies House
- Review the US classification and ownership thresholds
- File required US forms (e.g., Form 5471 if applicable)
Do you need to file a dormant company tax return?
|
Situation |
Do you file a tax return? |
|
HMRC confirms the company is dormant |
No |
|
HMRC sends a notice to file |
Yes |
|
The company starts trading |
Yes |
|
Dormant but not reported to HMRC |
Yes, if HMRC still expects a return (e.g., no dormancy confirmation or an active notice to file) |
Double-check your dormant status and US filing obligations to avoid issues.
What still needs to be filed for a dormant company?
You still need to file accounts with Companies House and submit a confirmation statement. Dormant status removes the Corporation Tax requirement, not all compliance obligations, as the company remains legally in existence. Inactivity is not the same as nonexistence, so certain filings continue.
HMRC vs Companies House requirements
|
Requirement |
HMRC |
Companies House |
|
Corporation Tax return |
Usually no (if dormant and no notice to file) |
Not required |
|
Notify dormant status |
Yes |
No |
|
Annual accounts |
Only required if a tax return is filed |
Yes |
|
Confirmation statement |
No |
Yes |
Key takeaway: HMRC focuses on tax activity, while Companies House monitors your company’s legal status; mixing the two is a common source of confusion.
What happens if HMRC sends a notice to file?
You must file a Corporation Tax return, even if the company is dormant. A notice to file overrides the usual dormant company rules. If you receive one, ignoring it can lead to penalties, even if no tax is due. In other words, dormant status does not cancel formal filing requests.
Do US expats need to report a dormant company to the IRS?
Yes, US citizens may still have reporting obligations for a dormant foreign company. The UK focuses on activity, while the US considers ownership, entity classification, and filing category.
Filing depends on the US tax treatment. For example, some foreign corporations may be required to file Form 5471, while others follow different rules. Dormant does not mean invisible for US tax purposes.
Does a dormant UK limited company trigger Form 5471 or Form 8858?
It depends on how the company is treated for US tax purposes. A dormant UK company does not automatically trigger a specific IRS form. Filing is based on entity classification, ownership, and filing category.
- Form 5471 may apply if the company is treated as a foreign corporation and you meet certain ownership or control thresholds
- Form 8858 may apply if the company is treated as a foreign disregarded entity
Common US reporting requirements for dormant companies
You may need to file Form 5471 if you meet certain ownership or control thresholds. For example, this can apply if you:
- Meet certain ownership levels in a foreign corporation (e.g., 10%+ in specific filing categories)
- Are involved in a controlled foreign corporation (CFC)
The key point is that US reporting depends on ownership, classification, and filing category, not just income. Even without activity, disclosure may still be required.
US reporting vs UK tax obligations
|
Requirement |
Applies to US Expats? |
|
UK Corporation Tax return |
Usually no |
|
US ownership reporting (e.g., Form 5471) |
May apply, depending on ownership, classification, and filing category |
|
Income reporting |
Generally, none if there is no activity |
|
Entity disclosure |
May apply, depending on the facts and US tax treatment |
What makes a company dormant for tax purposes?
A company is dormant if it has no significant accounting transactions during the financial year. Some limited administrative actions may be allowed, but most financial activity will remove dormant status.
The definition can differ depending on the filing context. HM Revenue & Customs and Companies House apply their own criteria, so a company may be considered dormant for one purpose but not the other.
Can a dormant company become active again?
Yes, a dormant company can resume trading at any time. If that happens, you’ll need to notify HMRC and restart Corporation Tax reporting. Timing matters, as delays can lead to compliance issues later.
What happens if you do nothing?
You may face penalties for missing required filings. Even if the company stays dormant, required filings must still be submitted. Missing them can lead to penalties, regardless of whether any tax is owed.
Frequently Asked Questions
Do dormant companies ever become taxable?
Not usually. However, if the company starts trading or receives income, Corporation Tax obligations can restart from that point.
Is it better to close a dormant company instead?
It depends. Closing the company removes ongoing filing requirements, but keeping it dormant may be useful if you plan to use it again later.
Can HMRC change a company’s dormant status?
Yes. If HMRC identifies activity, they may treat the company as active and require tax filings accordingly.
Does a dormant company affect my US tax filing?
It can. Even without income, ownership of a foreign company may trigger reporting requirements depending on ownership, entity classification, control, and filing category.
Are there penalties even if no tax is owed?
Yes. Filing penalties can apply even when there is no tax liability. The obligation is tied to reporting, not just payment.
Prefer to talk it through? Schedule your free callback today.
Clark Stott has been with Expat Tax Online since 2015. Being a dual national based in the UK, Clark has unique experience helping US citizens (and Accidental Americans) become tax compliant via the Streamlined Tax Amnesty program. Clark likes to help Americans in the UK keep their tax situations as simple as possible to avoid harsh IRS treatment.
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