Companies House filing guides

Companies House is closing WebFiling for annual accounts in April 2028. Here is what is changing and how to stay compliant.

A plain-English summary of the accounts reforms coming to Companies House in April 2028.

How to sign in to Companies House WebFiling, what you need, and what to do if you cannot get in.

How to request a new Companies House authentication code if you have lost or forgotten it, and how long it takes.

WebFiling is the free online service for filing company information with Companies House. Here is what you can do with it and what is changing.

The confirmation statement (CS01) confirms your company details with Companies House every year. Here is what it is and why it matters.

When your confirmation statement is due, the 14-day filing window, and what it costs to file.

A step-by-step guide to filing your CS01 confirmation statement online, including the deadline and fee.

What a SIC code is, how to choose the right one for your UK company, and how to change it on your confirmation statement.

A step-by-step overview of filing annual accounts, and how the process changes from 2028.

What abridged accounts are, which companies use them, and why the option is being abolished from April 2028.

When your company accounts are due, how the accounting reference date works, and the deadline for your first accounts.

Many directors confuse the accounts you file with Companies House and the ones you file with HMRC. Here is how they differ.

iXBRL is the machine-readable accounts format HMRC already requires and Companies House filing moves to in 2028. Here is what it means for you.

If your company did not trade this year, you still have to file. Here is how dormant accounts work.

A simple walkthrough of filing dormant accounts with Companies House, and what changes in 2028.

The steps to make your UK company dormant, tell HMRC, and stay compliant with Companies House.

Being dormant for Corporation Tax is separate from your Companies House filings. Here is how to tell HMRC, and what you still have to do.

Who qualifies as a micro-entity, what you must report, and what changes in 2028.

A quick check of whether your company qualifies as a micro-entity, and what it means for filing.

What FRS 105 is, which companies can use it, and what a micro-entity’s accounts must include.

Who counts as a small company, what you file, and how the 2028 changes affect you.

How Companies House late filing penalties build up, and the simplest way to avoid them.

The exact Companies House late filing penalty amounts, how they double for repeat delays, and how to avoid them.

You can appeal a late filing penalty, but only in limited circumstances. Here is how the appeal works and what counts.

How to update your company registered office with Companies House, and the rules that apply.

How to add a new director or remove one at Companies House, and what details you need.

What a CT600 is, who has to file one, the deadlines, and how it differs from the accounts you file at Companies House.

Whether a dormant company has to file a Company Tax Return, when HMRC will and will not ask for one, and how it differs from your accounts.

When you can file a Company Tax Return using HMRC’s free online service, when you need commercial software, and what changes by 2028.