Finding the Companies House UK contact number is one of those tasks that sounds simple until you're actually in the middle of it. The contact details change, the phone lines have limited hours, and if you're running a business, time spent navigating government bureaucracy is time not spent on growth.
This article covers exactly how to reach Companies House, what each contact channel is actually for, and how SMEs managing their own compliance and marketing can spend less time on admin and more time on what moves the needle.
Companies House UK Contact Number: The Direct Details
The Companies House UK contact number for general enquiries is 0303 1234 500. This line is open Monday to Friday, 8:30am to 6pm. For Welsh-language enquiries, the number is 029 2038 0065. If you're contacting Companies House about a specific filing, you'll need your company registration number to hand before you call — they cannot pull up your record without it.
Companies House also accepts contact by email at enquiries@companieshouse.gov.uk. Response times on email vary, but in practice you should expect one to three working days. For urgent matters — a dissolution notice, a filing deadline — the phone line is the only reliable option.
The registered postal address is Companies House, Crown Way, Cardiff, CF14 3UZ. This is the main office, though Companies House also has offices in Edinburgh, Belfast, and London for jurisdiction-specific filings.
For businesses that need to update registered office details, file confirmation statements, or deal with a compulsory strike-off notice, understanding which contact route applies to your situation saves a significant amount of time. The phone line handles most queries, but some matters — particularly those involving the Register of Overseas Entities — have dedicated contact routes listed on the GOV.UK website.
For more detail on navigating company registration numbers and what they mean for your business, see our guide on Company House Number: What SMEs Actually Need.
What Companies House Can and Cannot Help With
This distinction matters more than most people realise. After nine years running a marketing agency, we dealt with Companies House on behalf of clients on a regular basis — and the most common mistake was contacting them for something they simply don't handle.
Companies House maintains the public register of UK companies. They can help with filing accounts, confirmation statements, changing director details, updating your registered address, and queries about dissolved or struck-off companies. They cannot help with tax, VAT, PAYE, or anything HMRC-related. Those calls go to HMRC on 0300 200 3700.
They also cannot advise on legal disputes between shareholders, contract enforcement, or anything the courts handle. If you're looking for the company house uk contact number because you've received a legal notice, you likely need a solicitor, not a call to Cardiff.
One thing that catches SMEs out: Companies House does not send invoices. If you receive an invoice claiming to be from Companies House asking for payment to maintain your registration, it is a scam. This has been an ongoing issue for years. The legitimate fees for filing are minimal and paid directly through the GOV.UK portal.
| Contact Method | Best For | Response Time |
|---|---|---|
| Phone: 0303 1234 500 | Urgent filing queries, strike-off notices | Same day (during hours) |
| Email: enquiries@companieshouse.gov.uk | Non-urgent questions, written confirmation | 1–3 working days |
| WebFiling portal | Accounts, confirmation statements, address changes | Immediate |
| Post: Crown Way, Cardiff CF14 3UZ | Formal correspondence, paper filings | 5–10 working days |
| Welsh language: 029 2038 0065 | Welsh-language specific queries | Same day (during hours) |
Filing Deadlines SMEs Frequently Miss
The reason most SMEs end up searching for the company house uk contact number in the first place is a deadline they've nearly missed. The two most common are the confirmation statement and the annual accounts.
The confirmation statement must be filed at least once every 12 months. It confirms that the information Companies House holds about your company is accurate. Missing this does not immediately result in a fine, but failing to file eventually triggers a strike-off notice — which is significantly more disruptive to deal with.
Annual accounts deadlines depend on whether you're a private or public company. Private limited companies have nine months from the end of their accounting reference period to file. Miss this and you face automatic penalties starting at £150 for being one day late, rising to £1,500 for being more than six months late.
The WebFiling portal at find-and-update.company-information.service.gov.uk is the fastest way to handle most of these submissions. You do not need to call the company house uk contact number for routine filings — the portal handles the majority of standard transactions, including filing dormant accounts.
For a broader look at how to contact Companies House efficiently, our guide on Call Companies House: What SMEs Actually Need goes into further operational detail.
Why SMEs Conflate Compliance Admin with Marketing Admin
This might seem like an odd point to raise in an article about the company house uk contact number, but it reflects something we observed consistently across years of agency work. Small business owners treat everything — compliance, marketing, operations — as one undifferentiated block of admin. The result is that high-value tasks like managing Google Ads get the same fragmented attention as a Companies House filing.
The problem is that Google Ads does not tolerate neglect the way a confirmation statement does. Miss a filing deadline and you get a grace period. Let an underperforming ad campaign run unmanaged for a week and you've simply spent money on nothing.
For SMEs running paid search, the attention gap is expensive. Bids drift, budgets get consumed by low-intent searches, and campaigns that were working six weeks ago stop performing without any obvious trigger. This is where how much you're actually spending on Google Ads becomes a real question worth answering before you scale anything.
See also How to Fix High Cost Per Acquisition in Google Ads for a breakdown of where SME budgets typically leak.
How Overtime Handles the Marketing Side So You Don't Have To
Once Companies House admin is sorted — registered office confirmed, accounts filed, confirmation statement submitted — the next question for most SMEs is how to grow. For businesses running Google Ads, that usually means dealing with an account that needs more consistent attention than it's getting.
Overtime is an AI agent that manages Google Ads directly. It logs into your account, adjusts bids based on performance data, pauses keywords and ads that aren't converting, and reallocates budget toward what's working. It sends regular summaries so you know what's happened without needing to log in yourself.
This is a different model to hiring an agency or trying to manage campaigns manually. There's no monthly retainer negotiation, no account manager to brief every time your business priorities shift, and no lag between identifying a problem and acting on it. If a campaign starts burning through budget on irrelevant searches at 11pm on a Tuesday, it gets addressed — not flagged in a report the following Friday.
For context on what that kind of active management actually involves day-to-day, the paid search management service guide covers the mechanics in detail.
What to Do Right Now if You Need Companies House
If you've arrived here because you genuinely need the company house uk contact number today, here is the short version: call 0303 1234 500 between 8:30am and 6pm Monday to Friday. Have your company registration number ready. If it's non-urgent, email enquiries@companieshouse.gov.uk and expect a response within three working days. For filings, use the WebFiling portal directly — it's faster than any other route.
For Welsh-language support, use 029 2038 0065. For anything HMRC-related — tax, VAT, payroll — that's a separate call to 0300 200 3700. Companies House and HMRC are entirely separate organisations.
As you head into 2026, if your business is at the point where compliance is handled but growth is the focus, it's worth looking at what your Google Ads account is actually doing. You can review Overtime's approach to Google Ads management and see whether active, automated management makes more sense than the current setup. The company house uk contact number gets your filing sorted — what happens after that is where the real difference gets made.
For a closer look at what SMEs typically pay for managed Google Ads, PPC management fees gives a clear breakdown of what different approaches cost and what you actually get for the money. And if you're weighing up whether to use an agency or an AI agent, the best PPC agency vs AI agent guide is worth reading before you commit to either.
For Overtime's pricing structure, the details are straightforward and don't involve the kind of minimum spend commitments most agencies require.
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Frequently Asked Questions
What is the Companies House UK contact number for general enquiries?
The Companies House UK contact number for general enquiries is 0303 1234 500, open Monday to Friday from 8:30am to 6pm. For Welsh-language enquiries, the number is 029 2038 0065. Have your company registration number ready before you call.
What can I contact Companies House about?
Companies House handles queries about company registrations, filed accounts, confirmation statements, director details, registered office addresses, and dissolved companies. They do not handle tax, VAT, PAYE, or any HMRC-related matters — those require a separate call to HMRC on 0300 200 3700.
How do I file documents with Companies House without calling?
Most filings — including confirmation statements, dormant accounts, and address changes — can be completed through the WebFiling portal at find-and-update.company-information.service.gov.uk. This is faster than calling or posting and provides immediate confirmation of receipt.
Should I pay an invoice I received from Companies House?
No. Companies House does not send invoices requesting payment to maintain your company registration. Any invoice claiming to be from Companies House is a known scam. Legitimate fees are minimal and paid directly through the official GOV.UK portal during the filing process.
Do I need to contact Companies House every year?
You are required to file a confirmation statement at least once every 12 months and submit annual accounts within nine months of your accounting reference date. Both can be completed online. Failure to file eventually results in a compulsory strike-off, so building these into your annual calendar is worth doing.