Can I Restart Trading With a Dormant UK Company?

Ryan Patrick

Sep 21, 2026 • 10 min read

Yes. You can restart trading with a dormant UK company without incorporating a new company, provided the company is still registered and you deal with the relevant Companies House and HMRC requirements. Restarting a dormant company can be useful when you incorporated a business several years ago but never launched it, or when an established company stopped trading and you now want to use it again.

However, restarting is more than simply making a sale or opening a business bank account. You need to establish when trading actually resumes, check the company's existing records, notify HMRC, and make sure your accounts and tax reporting are handled correctly. The good news is that you do not need to separately tell Companies House that the company has restarted trading. Your next set of non-dormant accounts will show that the company is no longer dormant for Companies House purposes.

What Does It Mean to Restart a Dormant Company?

A company is generally dormant for Corporation Tax purposes when it is not carrying on business activity, trading or receiving income that makes it active for Corporation Tax. HMRC recognises several situations in which a company can be dormant, including a newly incorporated company that has never traded and an existing company that previously traded but stopped. When the company begins carrying on business again, it may become active for Corporation Tax. For example, suppose:

You incorporated ABC Digital Ltd in 2021.
The company never traded.
You kept filing dormant accounts with Companies House.
You now want to use ABC Digital Ltd to provide software services.
You sign your first commercial contract and begin providing services.

At that point, you need to treat the company as restarting its business activities and deal with HMRC accordingly.

Do I Need to Form a New Company?

Usually, no. If the existing company is still registered and suitable for your new business, you can generally restart it rather than incorporating another company. This can be particularly useful where the existing company's:

Name is still appropriate
Directors are correct
Shareholders are correct
PSC information is accurate
Registered office is suitable
SIC code reflects the intended business
Company records are in order

However, an old company should not automatically be treated as a clean slate. Before restarting, review its history and confirm that there are no outstanding liabilities, filing problems, tax issues or other matters that could affect your plans.

Step 1: Check That the Company Is Still Registered

Start by searching the company's record at Companies House. Check whether its status says Active. If the company has been neglected for several years, it may have been struck off the register because of missed filings.

You should also review the company's filing history to see whether annual accounts and confirmation statements have been filed consistently. A dormant company is still required to file annual accounts and a confirmation statement while it remains registered.

Check these details before restarting

Review:

Company status
Registered office
Directors
Persons with Significant Control (PSCs)
Shareholders
Share capital
SIC code
Accounting reference date
Accounts filing history
Confirmation statement history
Any outstanding Companies House filings

If any information is outdated, consider correcting it before the business becomes operational.

Step 2: Check Whether the Company Has Actually Remained Dormant

Do not assume that a company is dormant simply because it has had no customers. HMRC's definition focuses on business activity, trading and income. Some activities undertaken before trading begins, such as preparing a business plan or negotiating contracts, can be treated as pre-trading activities rather than trading. The distinction can become important if the company has:

Received income
Sold products or services
Bought and sold assets as part of business activity
Received investment income
Paid employees
Operated a business bank account
Registered for VAT and submitted returns
Continued an existing commercial operation

If there has been activity during the period you believed the company was dormant, establish exactly what happened before deciding how to report it.

Step 3: Identify the Actual Restart Date

One of the most important parts of restarting a dormant company is identifying when the business actually restarted. The restart date can affect the company's Corporation Tax accounting period and reporting obligations. It is not necessarily the date on which you decided to restart.

For example, if you spent January preparing a website, February negotiating contracts and began providing paid services on 15 March, the relevant tax treatment depends on the nature of those activities and when the company actually became active. Keep evidence of the date and circumstances of the restart, such as:

First customer contract
First invoice
First sale
Service agreement
Business bank transaction
Purchase order
Trading correspondence

Good records make it much easier to explain the company's position later.

Step 4: Tell HMRC That the Company Has Restarted

This is the central tax step. HMRC says you must tell it if a dormant company starts trading again. This effectively sets the company up for Corporation Tax. You can register for Corporation Tax through the company's business tax account.

You will normally need the company's Government Gateway credentials to use the online service. If you previously told HMRC that the company was dormant, you should not simply begin trading and assume HMRC will automatically update its records. The responsibility is on the company to deal with its Corporation Tax position.

What if HMRC already issued a notice to file?

This is an important distinction. If HMRC has issued a notice requiring the company to file a Company Tax Return, you may still need to file that return even if you considered the company dormant. A dormant company that has received a notice to deliver a Company Tax Return cannot simply ignore the notice because it believes it has no tax to pay.

Step 5: Understand the Difference Between Companies House and HMRC

This is one of the easiest areas to misunderstand. Companies House and HMRC have related but different responsibilities. Companies House deals primarily with the company's legal and public corporate record. HMRC deals with Corporation Tax and other tax obligations. A company can therefore be dormant for one purpose and have different reporting requirements for another. When you restart:

You do not separately notify Companies House that trading has restarted.
You do notify HMRC that the company has restarted for Corporation Tax.
Your future Companies House accounts will reflect the company's non-dormant status.
Your Corporation Tax accounting period starts when the company restarts business activities.

Understanding this distinction prevents one of the most common mistakes: assuming that updating one government record automatically updates the other.

Step 6: Understand Your New Corporation Tax Accounting Period

Your Companies House financial year and Corporation Tax accounting period do not necessarily work in exactly the same way when a dormant company restarts. HMRC specifically provides different rules for companies restarting business activities. For example, suppose your company's accounting reference date is 30 September and you restart trading on 1 May.

You can keep the Companies House accounting reference date of 30 September and prepare statutory accounts covering the usual period up to 30 September. However, the Corporation Tax accounting period begins when the company restarts trading. In HMRC's example, the Company Tax Return covers 1 May to 30 September.

This means the first Corporation Tax accounting period after restarting may be shorter than 12 months. That distinction is particularly important when preparing the first post-restart accounts and tax return.

Step 7: Know the Main Deadlines After Restarting

Once the company has restarted, normal reporting obligations become important. HMRC's restart guidance states that you should:

Send accounts to Companies House within 9 months of the company's year end
Pay Corporation Tax within 9 months and 1 day of the end of the Corporation Tax accounting period
File the Company Tax Return within 12 months of the end of the Corporation Tax accounting period

These deadlines are separate. For example, the date on which you need to pay Corporation Tax is not necessarily the same date as the deadline for submitting the Company Tax Return. A founder restarting a dormant company should put these dates into a compliance calendar as soon as trading begins.

Step 8: Review the Company Before You Start Invoicing

Restarting is an excellent opportunity to conduct a corporate health check. Before issuing your first invoice, verify that the company's public information accurately reflects the business.

Directors

Check that all current directors are correctly recorded. If someone has resigned, has joined the company or their details have changed, deal with the appropriate Companies House filing.

PSCs

Check the company's Persons with Significant Control information. Ownership and control may have changed during the years the company was dormant.

Registered office

Make sure important Companies House correspondence can still reach you. If you used an old address or formation agent years ago, this deserves particular attention.

SIC code

Check whether the company's SIC code still describes the business you are about to operate. A company that was originally set up for consulting but is now going to operate an ecommerce business may need its SIC information reviewed.

Confirm that the shareholders and shareholdings still reflect the ownership you intend to operate with. Do not change shares casually simply because the company is being restarted. Share transfers, new share issues and changes to ownership can have legal and tax consequences.

What About VAT and PAYE?

Restarting trading can also affect VAT and payroll. If the company was previously VAT registered, check its VAT status before making taxable sales. HMRC says that a company planning to restart can remain VAT registered while dormant but must submit nil VAT returns during the dormant period. If it does not intend to trade again, it should deregister from VAT.

If the company previously operated PAYE, check whether the PAYE scheme was closed when the business became dormant. If you are going to employ people again, you may need to deal with PAYE and related employer responsibilities before paying staff. The key point is simple: restarting Corporation Tax status does not automatically resolve every other tax registration.

Can I Restart a Dormant Company That Has Never Traded?

Yes, potentially. This is one of the simplest restart scenarios. Suppose you incorporated a company in 2022 but never launched it. You filed dormant accounts and confirmation statements each year. In 2026, you decide to finally launch the business.

Provided the company is still registered and its records are in order, you can generally use that existing company rather than incorporating another one. You would then notify HMRC when the company starts trading and follow the applicable accounting and Corporation Tax requirements.

Is an Old Dormant Company Better Than Forming a New Company?

Not automatically. An older incorporation date does not by itself make a company more valuable or more suitable for a new business. Before using the company, consider its history. An old company may have:

Previous trading activity
Outstanding liabilities
Old shareholders
Former directors
Historical tax issues
Existing contracts
Old banking relationships
Previous financing
Filing discrepancies

If the company genuinely has a clean dormant history, the practical decision may be straightforward. But if its history is unclear, investigate before restarting.

For international founders, this is particularly important. A founder based outside the UK may have created a UK company several years ago and now want to use it for a completely different international business. Banks, payment providers, accountants and other counterparties may ask questions about the company's ownership, activities and source of funds. The company's age does not eliminate those checks.

What If the Company Has Missed Its Annual Filings?

Deal with this before treating the company as ready for business. A dormant company must still file annual accounts and confirmation statements. If several years of filings are missing, identify exactly what is outstanding. You may need to:

Review the Companies House filing history.
Identify missing accounts and confirmation statements.
Determine whether the company genuinely qualified as dormant for each relevant period.
File the appropriate outstanding documents.
Deal with any applicable penalties.
Check the company's HMRC history.
Only then proceed with the restart.

Do not create historical figures simply to make old filings appear complete. If the company's historical position is complicated, professional accounting advice may be appropriate.

A Practical Dormant Company Restart Checklist

Before you restart trading, work through this checklist:

Companies House

Company is still active on the register
All required accounts have been filed
Confirmation statement is up to date
Registered office is correct
Directors are correct
PSC information is correct
Shareholders and share capital are correct
SIC code reflects the intended business

HMRC

Corporation Tax status checked
UTR located
Any previous notices to file reviewed
VAT status checked
PAYE status checked if relevant
Restart date established
Corporation Tax registration completed after restarting

Business operations

Business bank/payment arrangements reviewed
Accounting system ready
Invoices set up correctly
Business contracts reviewed
Insurance checked
Records and bookkeeping process established
Tax and filing deadlines added to a calendar

For a global founder managing a UK company remotely, this preparation is particularly valuable. A UK company formation and management platform such as IncorpUK can form part of the wider administrative infrastructure used to keep company information, compliance tasks and ongoing management organised.

Frequently Asked Questions

Can I restart trading with a dormant UK company?

Yes. If the company is still registered and suitable for the business, you can generally restart trading without forming a new company. You must tell HMRC when the dormant company starts trading again.

Do I need to tell Companies House that my company has restarted?

No. Companies House says you do not need to separately notify it when you restart trading. The next set of non-dormant accounts you file will show that the company is no longer dormant.

When does Corporation Tax start after restarting?

The Corporation Tax accounting period begins when the company restarts its business activities. It may therefore differ from the company's normal financial year at Companies House.

Do I need a new UTR when I restart?

Generally, you use the company's existing Corporation Tax details rather than treating the restart as a new company. If you have lost the company's UTR or have difficulty accessing the relevant HMRC services, resolve that before filing.

Can I restart a company that has been dormant for 10 years?

Potentially, yes. The number of years it has been dormant does not by itself prevent a company from restarting. The important questions are whether it is still registered, whether its records are accurate and whether its historical Companies House and HMRC obligations have been dealt with.

Can I change the company's business activity when I restart?

Yes, a company can change or expand its business activities, subject to the company's constitutional documents, regulatory requirements and other applicable rules. You should also review whether the company's SIC code accurately reflects its current activities.

Do I need a new bank account when restarting?

Not necessarily. If the company already has a suitable business bank account, you may be able to continue using it. If it does not, you can apply for an account with a bank or payment provider that supports your business and circumstances. Account providers conduct their own eligibility and compliance checks.

What if my dormant company has missed several years of accounts?

You should identify and address the outstanding filings before treating the company as ready to trade. Late filing can lead to penalties, and persistent non-compliance can create more serious Companies House problems.

Conclusion

Yes, you can restart trading with a dormant UK company. In many cases, there is no need to incorporate a second company simply because the first one has been inactive. But the restart should be treated as a compliance exercise as well as a business decision. First, confirm that the company is still active on the Companies House register. Then review its filing history, directors, PSCs, registered office, shareholders and SIC code. Check its HMRC position and establish the date on which business activity actually resumes.

Once trading restarts, notify HMRC and understand the company's new Corporation Tax accounting period and filing deadlines. Also review VAT, PAYE, banking and accounting arrangements where relevant. The most important principle is this: a dormant company is not a forgotten company. If you have maintained it properly, restarting may be relatively straightforward. If it has been neglected for years, resolve the historical issues first so that your new business starts with accurate records and a clear compliance position.