Most SME owners searching for the companies house customer service number are not doing it out of curiosity. They need to fix something — a filing error, a registered address issue, a dissolved company query — and they need to do it quickly.
This article covers how to reach Companies House, what each contact route actually handles, and how SMEs running Google Ads can stop wasting time on admin that has nothing to do with growing their business.
The Companies House Customer Service Number and How to Use It
The companies house customer service number is 0303 1234 500. This is the main contact line for Companies House in the UK, operated from their Cardiff headquarters. Lines are open Monday to Friday, 8:30am to 6pm. Calls are charged at a standard national rate, the same as 01 and 02 numbers, so they are included in most mobile and landline bundles.
For SMEs, knowing the right number is only half the equation. The queue times vary considerably depending on the time of year — filings deadlines in spring and autumn create significant backlogs. If you are calling near a statutory deadline, expect to wait. The team at the other end handles enquiries across incorporation, annual filings, strike-offs, charges, and registered office changes, so the call handlers are generalists rather than specialists in any one area.
If your query is specific — for example, a late filing penalty or a dormant company return — it is worth stating that upfront so you are routed correctly. From nine years running a marketing agency, dealing with Companies House queries on behalf of incorporated client businesses, the biggest time-waster we saw was people calling without the company number to hand. Have your Companies Registration Number ready before you dial.
Alternative Contact Routes Beyond the Phone Number
The companies house customer service number is useful, but it is not always the fastest route. Companies House provides several contact channels, each suited to different query types.
| Contact Method | Best For | Response Time |
|---|---|---|
| Phone: 0303 1234 500 | Urgent queries, deadline issues | Same day (queue dependent) |
| Email: enquiries@companieshouse.gov.uk | Document queries, written confirmation | 5–10 working days |
| WebFiling portal | Annual returns, confirmation statements | Instant self-service |
| Web-based chat (GOV.UK) | General guidance, eligibility questions | Same day |
| Post: Cardiff CF14 3UZ | Formal correspondence, paper documents | 2–4 weeks |
For most straightforward queries — checking whether a document has been received, confirming a company's status, or asking about filing extensions — the WebFiling portal and GOV.UK guidance pages will answer the question faster than calling. The GOV.UK Companies House guidance is well maintained and covers the majority of common SME scenarios.
That said, there are situations where only a conversation will do. Dissolution queries, director disputes, and anything involving the Register of Overseas Entities genuinely require a call. In those cases, the companies house customer service number remains the right starting point.
What Companies House Can and Cannot Help With
This is a distinction that trips up a lot of SME owners. Companies House is a registrar, not a regulator. They maintain the public register and process documents. They do not investigate company conduct, resolve commercial disputes, or give legal advice.
If you ring the companies house customer service number expecting help with a director who has acted improperly, or a creditor dispute, you will be redirected. The Insolvency Service handles wrongful trading complaints. HMRC handles tax matters. The Information Commissioner's Office handles data breaches. Companies House handles what is on the register and how to change it.
Understanding this boundary saves considerable time. When we were running client accounts that involved subsidiary structures and holding companies, the confusion between Companies House and HMRC cost clients hours of unproductive phone time. The rule of thumb is simple: if it relates to what appears on the public register, Companies House can help. If it relates to how the company is run or what it owes, it is a different body.
For SMEs specifically, the most common reasons to contact Companies House are:
- Correcting a registered office address
- Querying a late filing penalty
- Asking about the confirmation statement deadline
- Checking whether a document has been received and processed
- Understanding the process for voluntary strike-off
All of these are within scope. None of them require a specialist. A single call to the companies house customer service number, with your company number ready, will typically resolve them.
Why SMEs Waste Time on Admin Instead of Growth
Here is an observation that does not appear in most articles about the companies house customer service number: the fact that SME directors are making this call at all is a signal worth paying attention to.
When a business owner is spending a Tuesday afternoon on hold with a government registrar, they are almost certainly also the person managing their Google Ads account, chasing invoices, and writing proposals. The administrative load on small businesses is real, and it compounds. Every hour spent on compliance admin is an hour not spent on acquisition.
This is the context in which Overtime makes a meaningful difference. Rather than adding another task to the list — reviewing ad performance, pausing underperformers, adjusting bids — Overtime handles it as an AI agent working inside your Google Ads account. It logs in, makes changes, reallocates budget where it is performing, and sends a summary so you know what happened without having to be the one doing it.
For SMEs already stretched across compliance, operations, and sales, that is not a minor convenience. It is a structural shift in how time gets allocated.
If you want to understand what Google Ads management actually costs SMEs, the Ad Cost on Google: What SMEs Actually Pay guide covers the numbers honestly.
Companies House Contact for Specific Filing Situations in 2026
The confirmation statement deadline is one of the most commonly missed filing obligations for SMEs. As of 2026, the confirmation statement must be filed at least once every 12 months, within 14 days of the review period end date. Missing this deadline results in a default notice and, eventually, compulsory strike-off proceedings.
If you have missed a deadline and are unsure of your current status, the companies house customer service number is the right first call. The team can confirm whether a default notice has been issued, whether the company is still in good standing, and what documents are outstanding. They cannot waive penalties, but they can clarify the situation — which is often the most urgent thing an SME director needs.
For late filing penalties on accounts, there is a separate penalty appeal process. Companies House provides a form-based appeal route, and penalties can sometimes be waived on a first offence with a credible reason. This is worth knowing before assuming a penalty is final.
If your situation involves a company that has already been struck off and you need to restore it, that is a more complex process involving either administrative restoration (if struck off for missed filings) or court-based restoration (if struck off for other reasons). The companies house customer service number can explain which route applies, but the actual work requires either a solicitor or careful navigation of the Companies Act 2006.
For SMEs who want to understand other administrative queries around company numbers and registration, the Company House Number: What SMEs Actually Need article covers the basics, and Call Companies House: What SMEs Actually Need goes into more detail on preparation and routing.
Managing Google Ads While You Handle the Essentials
Dealing with Companies House takes time. So does reviewing which keywords are burning budget, checking whether your cost per acquisition has crept up, and deciding whether to pause a campaign that stopped converting two weeks ago.
Most SMEs end up doing none of those things consistently. Google Ads accounts get set up, run for a few months, and then sit largely untouched — which means performance drifts. Bids stop being competitive. Budgets stay allocated to campaigns that are no longer performing. The account becomes expensive and ineffective without anyone noticing quickly enough to change it.
That is the specific problem Overtime addresses as an AI agent. It works inside your Google Ads account on a schedule, makes bid and budget adjustments based on actual performance data, and flags what has changed. You still receive the summary. You still make strategic decisions. You just do not have to do the daily account work yourself.
For SMEs trying to understand what proper paid search management looks like, the Small Business PPC Management: What Actually Works guide is a practical starting point. And if you are trying to decide between a human agency and an AI agent, the Best PPC Agency or AI Agent: What SMEs Need comparison covers the trade-offs directly.
The question of how much Google Ads costs SMEs is also worth reading before committing to any management approach — because the management cost is only one part of the total spend picture.
Before You Call: What to Have Ready
If you have concluded that the phone is the right route, preparation makes the difference between a five-minute call and a twenty-minute one.
Have your Companies Registration Number ready — this is the eight-digit number on your certificate of incorporation and on all official correspondence from Companies House. Have the name of the director or person the query relates to. If you are asking about a specific document, have the document reference number if possible. And if you are calling about a penalty, have the original default notice or penalty notice in front of you.
The companies house customer service number connects you to a team that handles hundreds of calls per day. The clearer and more specific your query, the faster it gets resolved.
Once the Companies House matter is dealt with, if you want your Google Ads running without the same level of ongoing attention, Overtime manages that work as an AI agent — so the next time you are on hold about a filing deadline, your ad campaigns are still being looked after.
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Frequently Asked Questions
What is the Companies House customer service number?
The companies house customer service number is 0303 1234 500. Lines are open Monday to Friday, 8:30am to 6pm, and calls are charged at the standard national rate, the same as 01 and 02 numbers.
What can Companies House actually help me with over the phone?
Companies House can help with queries relating to the public register — filing deadlines, registered office details, document status, confirmation statements, and voluntary strike-off. They cannot help with tax matters, director disputes, or legal advice, which fall under HMRC, the Insolvency Service, or specialist solicitors.
How do I appeal a late filing penalty from Companies House?
Companies House has a formal penalty appeal process available through their website. Penalties can sometimes be waived on a first offence if you have a credible reason, but the appeal must be submitted in writing. Calling the companies house customer service number first can help you understand whether an appeal is likely to succeed.
Should I call or use the WebFiling portal for a confirmation statement?
For filing or checking the status of a confirmation statement, the WebFiling portal is faster and does not require a phone queue. The companies house customer service number is better suited to situations where something has gone wrong — a missed deadline, a rejected document, or a query that cannot be resolved through self-service.
Do SMEs need a specialist to handle Companies House queries?
Most routine queries — address changes, filing deadline questions, confirmation statement checks — can be handled directly by a director without specialist help. More complex situations, such as restoring a struck-off company or dealing with a charges register issue, may benefit from a solicitor's involvement. The companies house customer service number is always a reasonable first step to understand what you are dealing with.