Unsure where your company stands for UK tax?
If you’re running a non-resident company, UK Corporation Tax might still apply to you. Whether you own UK property, earn income here, or manage operations from the UK, HMRC can treat your business as liable for Corporation Tax. It all depends on where your company is considered tax resident and how your activities are structured.
In this guide, you’ll learn:
- How UK corporate tax residency is determined.
- When non-resident companies must pay Corporation Tax.
- How to register with HMRC and what documents you’ll need.
- Common pitfalls to avoid and how to stay compliant with UK tax law.
We’ll also show how the right accounting services can simplify the process and keep your company on the right side of HMRC.
What makes a company non-resident for UK tax purposes?
A company’s UK tax residency determines where it pays Corporation Tax, in the UK, abroad, or both. HMRC uses two main tests to decide this.
Test | What it means | Typical outcome |
Incorporation test | If a company is incorporated in the UK, it’s automatically a UK tax resident. | UK tax resident |
Central management and control test | Even if a company is incorporated abroad, it can still be UK-resident if its highest-level decisions are made in the UK. | Often treated as UK-resident for tax |
Central management and control (CMC) refers to where strategic decisions happen — not where admin tasks are carried out. It’s usually where the board of directors meets and makes decisions that shape the company’s direction.
A few quick checks help clarify where control really lies:
- Are board meetings genuinely held outside the UK?
- Do directors make independent decisions, or just follow instructions from UK owners?
- Does the business plan or financial strategy originate in the UK?
If control effectively sits in the UK, HMRC may treat the company as UK-resident, even if it’s incorporated elsewhere. This means Corporation Tax applies to worldwide profits, not just UK income.
Sometimes a company can be a dual tax resident, meaning both the UK and another country claim taxing rights. In these cases, tax treaties decide which country takes precedence through a “tie-breaker” rule that considers where central management and control truly rest.
Getting this right matters. It determines whether your company pays Corporation Tax on global profits or only on UK source income.
When a non-resident company must pay UK Corporation Tax
Even if your company is not a UK tax resident, it can still be liable for UK Corporation Tax in certain situations. HMRC looks at where and how your company earns income, not just where it is based.
You must pay UK Corporation Tax if your non-resident company:
- Trades in the UK through a permanent establishment such as a branch, office, or agency that carries out business on your behalf.
- Owns or sells UK land or property, including shares in a company that mainly holds UK property.
- Earns rental income from UK property or land.
Activity | Corporation Tax liability | Tax basis |
Trading in the UK through a branch or agency | Yes | Profits attributable to the UK branch or agency |
Disposing of UK property or property-rich shares | Yes | Gains from UK assets |
Earning rental income from UK property | Yes | UK property income |
Holding UK property but not renting or selling | No | No UK Corporation Tax liability |
Until April 5th 2020, most non-resident companies with UK property income filed under the income tax system using form SA700. These companies now fall under the Corporation Tax system, using the CT600 return like UK-based businesses.
If your company previously filed income tax returns for property income, it must now register for Corporation Tax with HMRC. Companies that have been dormant for tax purposes but start earning income again must also re-register.
Failing to register within three months of becoming liable can lead to late registration penalties, so it is best to act as soon as UK activity begins, or after selling a business asset subject to Corporation Tax.
How to register a non-resident company for Corporation Tax
Registration is done through HMRC’s online services, and the exact process depends on whether your company already has a Government Gateway account. Acting early matters, as access codes sent overseas can take several weeks to arrive.
If your company already has a Government Gateway ID
- Log in to the HMRC portal and request your Corporation Tax Unique Taxpayer Reference (UTR).
- Once you receive the UTR, you can use it to submit your CT600 return and manage tax payments online.
- Remember, you’ll need to register for Making Tax Digital for Corporation Tax soon too.
If your company does not yet have a Government Gateway ID
- Go to HMRC’s website and register your company for Corporation Tax.
- Allow time for HMRC to create your records and send your access codes.
- Codes are sent by post and may take 2 to 8 weeks to reach an overseas address.
- Once received, log in, confirm your details, and activate your Corporation Tax account.
Step | What to do | Timeframe |
1 | Create a Government Gateway ID | Instant |
2 | Register the company online | Within 3 months of becoming liable |
3 | Wait for access codes | 2–8 weeks |
4 | Activate HMRC online services | As soon as the codes arrive |
5 | File your first CT600 | Within 12 months of the accounting period end |
If you are unsure about any step, you can authorise an agent such as Sleek to act on your behalf and manage the process from start to finish. This is particularly helpful if your directors or decision-makers are based outside the UK, or if you want full confidence to avoid HMRC and Companies House fines.
Companies with overseas offices but no permanent establishment in the UK, such as construction firms working under the Construction Industry Scheme, must register separately through that scheme instead of the standard Corporation Tax route.
Need help registering your non-resident company for UK Corporation Tax?
Documents and information needed for non-resident company UK Corporation Tax registration
Whether you are registering for the first time or reactivating a dormant company, HMRC requires a clear record of your company’s identity, structure, and UK activities. Preparing these details in advance speeds up registration and reduces the risk of delays.
You’ll need to provide:
- Company name and registered overseas address, along with all contact details.
- Previous company names, if any.
- Date of incorporation and the jurisdiction of registration.
- Names and contact details of directors and company officers.
- Date the UK activity began, such as when a property was sold or rental income started.
- Details of any UK property or land interests and the nature of income received.
- Income Tax Unique Taxpayer Reference (UTR) if you have previously registered with HMRC for property income or self-assessment.
Keep digital copies of your certificate of incorporation, shareholder records, and board resolutions showing company decisions relating to UK activities. HMRC may ask to see these if it needs to confirm when your liability began.
It’s also good practice to:
- Record where board meetings take place.
- Note who makes strategic decisions.
- Define which office or branch manages UK operations.
- Use a professional registered office address to protect director privacy.
This information can help demonstrate that your company is correctly classified as non-resident for tax purposes and prevent disputes over where control really sits.
Maintaining good bookkeeping records pay dividends later. It's one of the best ways to ensure a smooth registration process.
When to register your non-resident company for UK Corporation Tax
HMRC requires every company to register for UK Corporation Tax within three months of becoming liable. For non-resident companies, this point depends on when a UK-related activity begins rather than when the company was formed. The following cases outline when registration is required.
Selling or disposing of UK property or shares
If your company sells UK property or shares in a property-rich company, registration must happen within three months of the sale being completed. This rule applies even if the transaction made a loss.
Earning rental income from UK property
Owning a UK property alone does not create a Corporation Tax liability, but earning rent from it does. You must register within three months of receiving your first rental payment.
Trading in the UK
If your company begins to trade in the UK through a branch, office, or agent, register within three months of starting business activity. Trading includes signing contracts, providing services, or selling goods from the UK.
Returning from dormancy
If a previously dormant or inactive company becomes active again, you must notify HMRC and re-register within three months of resuming activity.
Why it pays to act early
Access codes for non-UK addresses can take several weeks to arrive, so starting early helps avoid late filing penalties. Once registered, HMRC will issue your Corporation Tax Unique Taxpayer Reference (UTR), create your online filing account, and confirm your payment deadlines.
How non-resident companies avoid UK Corporation Tax penalties and stay compliant
Registering correctly is only part of the process. Once you’re set up with HMRC, staying compliant means filing on time, keeping accurate records, and ensuring your company’s tax residency status remains clear.
File and pay on time
Non-resident companies must submit a Corporation Tax Return (CT600) within 12 months of the end of their accounting period. The Corporation Tax bill itself must usually be paid nine months and one day after that date.
Missing either deadline triggers automatic penalties and interest. Learn how HMRC applies these in our VAT late payment penalty guide.
If you’re unsure which dates apply, check your HMRC online account. It lists your accounting period and all key filing deadlines.
Keep your records in order
Maintain complete and accessible records for at least six years. This includes:
- Income and expense records linked to UK property or trading.
- Copies of contracts and invoices.
- Details of directors’ decisions and where meetings took place.
These details help confirm your company’s non-resident status and demonstrate that central management and control are genuinely outside the UK. You can also explore ways to minimise Corporation Tax liability through better planning.
Review your company’s management structure
If the board or main decision-makers spend increasing time in the UK, HMRC may reclassify your company as a UK tax resident. This would extend your Corporation Tax liability to worldwide profits. Regularly reviewing how and where decisions are made helps avoid this.
Seek professional support
Tax residency issues can be complex. Working with a qualified tax agent such as Sleek ensures your company stays compliant with UK rules and avoids penalties for late registration or incorrect filing.
Simplify non-resident company UK Corporation Tax with Sleek
Managing UK Corporation Tax from overseas can be complex. Between determining your residency status, registering correctly, and filing on time, there are several steps where errors can cause delays or penalties.
Sleek helps non-resident companies handle every stage of the process efficiently. Our team can:
- Confirm your company’s UK tax residency position.
- Register your non-resident company for Corporation Tax with HMRC.
- Prepare and file your CT600 accurately and on time.
- Provide registered office and accounting services for a complete UK setup.
We’ve supported thousands of international founders and business owners in staying compliant with UK tax law.
Whether you’re earning UK rental income or disposing of UK assets, our experts ensure your company meets HMRC requirements.
Let Sleek handle your UK Corporation Tax registration & filing so you can focus on growing your business
FAQs on non-resident company UK Corporation Tax
Do non-resident companies have to pay UK Corporation Tax?
Yes. A non-resident company must pay UK Corporation Tax if it trades in the UK through a branch or agency, earns rental income from UK property, or disposes of UK land or property-rich shares.
How is a company’s UK tax residency decided?
HMRC uses two main tests: where the company is incorporated and where its central management and control takes place. If strategic decisions are made in the UK, the company may be treated as a UK tax resident even if it was formed abroad.
What is a permanent establishment for Corporation Tax purposes?
A permanent establishment is a fixed place of business in the UK, such as a branch, office, or agent that acts on behalf of the company. Income or gains connected to that establishment are taxable in the UK.
When should a non-resident company register for UK Corporation Tax?
You must register within three months of becoming liable. This could be the date your UK property starts generating rental income, when you begin trading in the UK, or when you sell UK land or assets.
What forms do non-resident companies file for Corporation Tax?
Non-resident companies file the CT600 return through HMRC’s online service. Income Tax form SA700 is no longer used for property income.
Can a non-resident company become a UK tax resident by mistake?
Yes. If board decisions are made in the UK or if UK directors control the strategy, HMRC may decide the company is a UK tax resident. This can extend tax to worldwide profits, so companies should document where and how decisions are made.
What penalties apply for late registration or filing?
HMRC can issue penalties for missing registration or filing deadlines and charge interest on late payments. The longer the delay, the higher the penalty.
How can Sleek help non-resident companies with UK Corporation Tax?
Sleek can confirm your tax residency position, register your company with HMRC, and handle ongoing compliance. Our accounting services keep non-resident companies up to date with UK Corporation Tax rules and deadlines.
