Introduction
Short answer first: a Royal Mail PO Box cannot be used as the registered office address for a UK limited company or LLP. It can still work as a general mailing address for customer post, but it won't satisfy Companies House.
This question comes up constantly for founders who want to keep their home address off the public register. Others need to run a business remotely, operate from overseas, or avoid renting office space they don't actually need.
The confusion is understandable. Company registration, the registered office requirement, everyday correspondence and compliant alternatives often get lumped together as "the business address." They are governed by different rules. This article untangles them using the current Companies House position, and points you toward addresses that actually work.
Key Takeaways
- Companies House requires an "appropriate" registered office address; a PO Box alone doesn't qualify
- An appropriate address must allow recorded delivery of official documents to a company representative
- A PO Box can still work for non-statutory mail, provided the organisation you're dealing with accepts it
- Confirm any address with Companies House, HMRC, your bank and payment providers before using it publicly
Can You Register a Business to a PO Box in the UK?
For limited companies and LLPs, a PO Box by itself should not be used as your registered office address.
Companies House treats the registered office as the company's official legal address. It appears on the public register and is used for statutory notices, legal documents and formal correspondence from HMRC and other government bodies.
This is different from several other addresses your business might use day to day. Mixing them up is a common mistake among new directors:
- Registered office: the official address filed with Companies House; must meet the "appropriate address" test (details below)
- Trading address: where you actually operate; can be a home, warehouse, shop or shared workspace
- Correspondence address: a general contact address for non-statutory mail
- Director's service address: the public-record address used for communications to a specific director, which can differ from the registered office
What About Sole Traders?
Sole traders don't register a company with Companies House, so there's no registered-office requirement to worry about. That doesn't mean address rules disappear entirely, though.
You'll still need a reliable address for:
- HMRC Self Assessment registration and correspondence
- Invoices to customers and suppliers
- Insurance policies and financial applications
- Bank account setup, where providers often expect a UK residential or business address
A PO Box might cover part of this, but many organisations still expect a physical address regardless of how your business is structured.
This article reflects general guidance based on current GOV.UK rules on registered office addresses. It isn't legal advice, and the rules can change, so check the live guidance before filing anything.
Why a PO Box Usually Fails the UK Registered Office Requirement
The rule against PO Boxes isn't arbitrary. It comes from a specific legal test introduced by the Economic Crime and Corporate Transparency Act 2023, which amended section 86 of the Companies Act 2006.
The "Appropriate Address" Test
Under the amended law, an address only qualifies as the registered office if, in the ordinary course of events:
- A document delivered there by hand or post would be expected to reach someone acting on behalf of the company, and
- Delivery can be recorded through an acknowledgement of delivery
A numbered PO Box fails this test almost by design. It identifies a mailbox, not a location where a person receives documents and confirms receipt. Royal Mail holds or forwards the mail, but there's no built-in mechanism for acknowledging delivery of statutory notices the way Companies House expects.
These changes took effect on 4 March 2024, as part of the first phase of ECCTA reforms rolled out by Companies House.
What Happens If Your Address Doesn't Qualify
Using an address that fails the test creates concrete compliance risk:
- Risk rejection of your incorporation or address-change filing
- Face a default Companies House address swap, with 28 days to evidence a compliant replacement
- Trigger strike-off action if you miss the response deadline
- Miss statutory notices because post never reaches anyone
- Face extra bank and payment-provider checks when a PO Box appears at onboarding
None of this means third-party addresses are banned. An accountant, solicitor or company formation agent can provide a compliant registered office, provided:
- The address meets the appropriate-address test above
- The company has the provider's permission to use it
- The provider runs a real process for receiving and acknowledging official post
What matters is whether documents reliably reach a person, not who technically owns the address.
When Can a PO Box Still Be Used?
A PO Box still works for many business tasks, but it cannot serve as your registered office. Legitimate uses include:
- Receiving responses to marketing campaigns or competition entries
- Handling customer returns or general enquiry post
- Keeping a home address off invoices, packaging or a website's contact page
- Separating personal mail from business mail without renting office space
The key condition: the organisation you're dealing with must accept a PO Box, and you're not presenting it as your company's registered office. A PO Box can sit quite happily alongside a compliant registered office. They serve different purposes.
Practical example: A small e-commerce company registers its accountant's office as the Companies House registered office, satisfying the appropriate-address test. It then advertises a separate PO Box on packaging and its website for customer returns. Companies House and HMRC see the accountant's address. Customers see the PO Box. Both work because neither is asked to do the other's job.
Don't assume every provider accepts a PO Box. HMRC, banks, payment processors, online marketplaces, insurers and licensing bodies each set their own address policies. Several want a verifiable physical address for identity checks. Confirm with each provider before relying on a PO Box.
Royal Mail's Current PO Box Terms
Royal Mail runs two main services, both requiring an application and, for Deliver, a linked home address:
| Service | How it works | 6 months | 12 months |
|---|---|---|---|
| PO Box Deliver | Mail forwarded to your home address | £276.60 | £499.80 |
| PO Box Collect | Mail held for collection at your local Customer Service Point | £243.00 | £416.40 |
Monthly Direct Debit is also available. Royal Mail's PO Box page notes online applications can take up to seven working days to process, longer by post, so check current terms before signing up.
What Address Should You Use Instead?
If a PO Box is off the table, four realistic options remain for a UK registered office:
- Your home address: free and simple, but it stays on the public register unless you file a separate director's service address
- Leased commercial premises: solid if you already rent an office, but overkill if you don't need physical space
- An accountant or solicitor's address: often bundled with other services, if they agree and the address meets the appropriate-address test
- A company formation provider or virtual office service: built specifically for this purpose
What a Compliant Address Actually Needs
Whichever option you choose, it should offer:
- A genuine, identifiable UK location
- Reliable, consistent receipt of post
- A person or process that acknowledges delivery
- Your documented permission to use the address
- Fast access to statutory correspondence, so deadlines don't slip
A registered office and a director's service address are not the same thing. The registered office belongs to the company. A director's service address is that individual's public correspondence address and can differ from the registered office—a common way to add privacy without moving the company's official address.
Virtual Offices: Check Before You Buy
"Virtual office" covers everything from basic mail-scanning to full reception and meeting-room access. Not every plan is built to satisfy Companies House. Before paying, confirm the specific package includes registered-office suitability, not just a trading address for your website.
Weighing Up Cost
Prices vary and change over time, so check current terms directly with providers rather than relying on old figures. Typical pricing bands look like this:
- Basic registered-office services from formation agents often start in the low tens of pounds per year
- Fees typically rise with add-ons like same-day mail scanning, forwarding or identity verification
- Renewal and cancellation terms differ significantly between providers
Compare setup fees, renewals, scanning limits, forwarding charges and cancellation notice periods, not just the headline annual price.
Address choice gets harder when the UK company also ties into operations or investment in India. VJM Global helps with formation, accounting and tax compliance on UK–India structures, but the registered office itself must still come from a UK-based provider that meets the appropriate-address rules.
Practical Checklist Before Registering or Changing Your Address
Before you file anything, run through this two-stage checklist.
Before You Register or Change Anything
- Confirm the company's registration jurisdiction (England and Wales, Scotland, or Northern Ireland); the registered office must be in the same jurisdiction
- Verify the address passes the appropriate-address test
- Get explicit permission from the address owner if it isn't your own premises
- Ask how statutory mail is received, checked and acknowledged
- Enter the address consistently across your Companies House filings
After Registration
- Update Companies House immediately if the registered office changes, using form AD01 or the online service, within 14 days
- Tell HMRC and any relevant providers about the change where required
- Set up mail redirection at the old address during the transition
- Watch for confirmation letters and authentication codes, which can easily go missing during a move
Ask your address provider directly:
- Do they forward, scan or store official documents?
- How fast is their alert when something arrives?
- What happens to anything hand-delivered?
- Is there a genuine process for recording delivery?
Keep your registered office, director's service address, trading address, website, invoices, bank records and customer-facing details consistent everywhere.
If your business has unusual overseas, regulatory or privacy needs, get advice from a solicitor, accountant or qualified formation professional before you commit to an address.
Frequently Asked Questions
Can you use a PO Box to start a business?
As a sole trader, yes, there's no registered office requirement to worry about. If you're incorporating a limited company or LLP, a PO Box alone should not be used as the registered office.
Is it okay to have a PO Box for a business?
Yes, for general or customer correspondence. It shouldn't be treated as a substitute for a compliant registered office, and banks or government bodies won't automatically accept it as your official address.
How much does a UK PO Box cost?
Royal Mail currently lists PO Box Deliver at £499.80 for 12 months and PO Box Collect at £416.40 for 12 months, with monthly Direct Debit also available. Check Royal Mail's site for the latest pricing before applying.
Can I use a PO Box as my registered office address?
No, a PO Box alone doesn't meet the appropriate-address requirement. A professional third-party address, such as an accountant's office, can work instead if it meets the legal test and you have permission to use it.
What address can I use instead of a PO Box to register a UK company?
A home address, genuine business premises, or a compliant professional registered-office service all work. Confirm the provider's Companies House suitability before purchasing any registered-office package.
