Companies House: Your Quick Guide to UK Business Filings

If you run a UK company, Companies House is the place you’ll hear about most. It’s where you register, file annual accounts, and keep your public record straight. Missing a deadline or filing the wrong form can cost you money and time, so let’s keep it simple and make sure you’re always on track.

How to file your annual accounts

First up, annual accounts. Every limited company must send them to Companies House once a year. The deadline is usually 9 months after your accounting reference date (ARD). If your ARD is 31 December, you have until 30 September the next year.

Here’s a quick step‑by‑step:

• Log in to the WebFiling service with your company number and authentication code.
• Choose the right form – most small companies use AA01 for a balance sheet and profit and loss statement.
• Enter the figures exactly as they appear in your signed accounts. Double‑check totals – a tiny mistake can trigger a rejection.
• Upload any required notes or supporting documents.
• Submit and keep the confirmation receipt. It’s proof you filed on time.

If you can’t make the deadline, you can apply for an extension, but you’ll still need to pay a late filing penalty. The sooner you act, the lower the fee.

Finding useful data on Companies House

Companies House isn’t just a filing hub; it’s also a treasure chest of public data. Want to see who’s behind a competitor? Need to verify a director’s background? All that info lives online.

To dig it up:

• Go to the Companies House Service (CHS) portal.
• Enter the company name or registration number.
• Browse sections like People (directors and secretaries), Filing history (past accounts, confirmation statements), and Mortgages (loans secured against the company).

The free search shows basic details, but if you need bulk data or more frequent checks, consider the Companies House API. It lets developers pull real‑time info straight into their own tools – handy for accountants, investors, or anyone who needs up‑to‑date company insights.

Remember, the data is public, so treat it responsibly. Don’t use it for spam or illegal purposes – Companies House can pull the plug on misuse.

Finally, a quick tip for directors: keep your personal address up to date in the register. It’s the easiest way to avoid unexpected letters or missed communications.

Staying on top of Companies House requirements doesn’t have to be a nightmare. Use the web tools, set calendar reminders for filing dates, and check the public register when you need to verify facts. With a little routine, you’ll keep your company compliant and avoid nasty surprises.