Setting up a private limited company in the United Kingdom is one of the faster and more affordable incorporations available anywhere. The process is largely digital, and a straightforward company can be registered within a day. That speed can be a little misleading, though. A UK company carries real obligations from the moment it exists, and a formation done carelessly creates problems that surface later, often when you raise investment or sell. This article explains what a UK formation involves, what you need to provide, and what Cosmos does at each stage.

A UK company has a small number of mandatory components, and each has rules attached.

Directors. A company needs at least one director, who must be a natural person, meaning a human being rather than another company, and at least 16 years old. There is no upper limit on the number of directors, and they need not live in the UK or hold any particular nationality. The director is legally responsible for running the company and for making sure its filings are made on time.

Shareholders. A company needs at least one shareholder, also called a member. A shareholder can be an individual or another company, and can be based anywhere in the world. One person can be both the sole director and the sole shareholder.

People with significant control. UK law requires the company to identify anyone who is a person with significant control, usually shortened to PSC. Broadly, a PSC is someone who holds more than 25 per cent of the shares or voting rights, or who otherwise exercises significant influence over the company. PSC information is filed at Companies House and is public.

Share capital. There is no minimum. A company can be formed with a single share of one pound. The shares issued to shareholders are recorded in a statement of capital.

Registered office. Every company must have a registered office address in the UK. This is the official address for legal and government correspondence, and it appears on the public register. It does not need to be where the business operates, and Cosmos can provide one.

SIC code. Every company selects one or more Standard Industrial Classification codes, which describe in official terms what the business does.

Articles of association. These are the company's internal rulebook, governing how decisions are made and how shares are issued and transferred. Most companies adopt standard model articles, which suit a straightforward setup; where your ownership or investment plans are more involved, bespoke articles may be needed, and Cosmos will flag that.

A UK company name must be unique, must not be offensive, and must not imply a connection with government or use a sensitive word or expression without permission. Cosmos checks availability and compliance before you commit to a name, so you do not grow attached to one that will be refused.

UK company law now requires directors, and people with significant control, to have their identity verified. This requirement was introduced to improve the reliability of the public register and to reduce fraud. Verification can be completed directly with Companies House or through an authorised provider. Cosmos manages it for you as part of the formation, so it does not become a separate piece of admin or a source of delay.

A standard online incorporation is usually completed within one working day, and often within hours, once identity verification and documents are in order. The slow part is rarely Companies House. It is gathering complete and correct information from everyone involved, which is why Cosmos front-loads that work.

On incorporation you receive the certificate of incorporation, which confirms the company exists and shows its registered number and date of incorporation, together with the memorandum and articles of association, a share certificate for each shareholder, and the company registers. Keep these safe. You will be asked for them when you open a bank account, sign significant contracts, or take on investment.

A formed company is the start, not the finish. Within the first weeks you will usually need to register the company for corporation tax with HMRC, open a business bank account, and, if you will employ people, set up a payroll scheme. If the company expects to pass the VAT threshold, it will also need to register for VAT. Cosmos moves straight from incorporation into these steps so there is no gap. Staying compliant in the UK explains the obligations that then continue each year.

The cheapest possible formation is not always the right one. A company set up without thought to its share structure can be expensive to correct later, particularly once investors are involved and every past decision is examined. A short, clear conversation about structure at the start is worth the time it takes.

Cosmos manages the whole formation: confirming the structure, preparing the documents, handling identity verification, filing with Companies House, and moving you into tax registration and banking. You receive a single fixed quote, covering the government fee and the Cosmos fee, before anything begins. If your situation needs legal input beyond the formation itself, a shareholders' agreement for example, Cosmos will tell you and introduce you to counsel.