Common mistakes when setting up a limited company

5th March 2026

Setting up a limited company in the UK is marketed as quick and straightforward, and technically, it is. In many cases, you can incorporate within hours. But that speed is exactly why mistakes happen. Beneath that simplicity sits a series of administrative, legal, financial and structural decisions that many first time directors don’t fully understand at the point of registration. That’s why preparation matters.

At 99p Company Formations, we see first hand how small formation errors can create unnecessary stress later. These are some of the most common mistakes we’ve encountered throughout our careers and how you can avoid them.

1. Choosing an unavailable company name

One of the first and most common errors is selecting a company name that is already in use or too similar to an existing business.

If your chosen name does not meet availability rules, Companies House will reject the application. While this is not a major legal issue, it can delay your launch, especially if you have already secured a domain name or begun marketing under that name.

Problems typically arise when:

• The name is identical to an existing registered company

• It is considered ‘too similar’ in spelling or pronunciation

• It contains restricted or sensitive words

• It implies regulated activity without approval

To avoid delays, always check name availability thoroughly before submitting your application and only pursue marketing, PR, domain names, and branding once your name is approved.

2. Selecting the wrong company structure

Many new business owners default to registering a limited company because someone recommended it as the ideal structure without considering which type of limited company best aligns with their goals.

Registering the wrong type of company, or rushing through decisions about shares, can create extra administration later and unlike other administrative errors, adjusting company structure is complex and time consuming. Changing ownership structures after incorporation requires formal updates, and in some cases legal documentation.

When setting up a UK limited company, you need to choose whether it will be:

• Limited by Shares, or

• Limited by Guarantee

Each is suited to different purposes.

A company limited by shares:

• The company is owned by shareholders.

• Shareholders invest capital in return for shares, and liability is limited to the amount unpaid on those shares.

• Profits can be distributed to shareholders as dividends.

• This structure suits most standard businesses, start ups, or any profit driven venture.

• You must issue at least one share and have at least one shareholder.

A company limited by guarantee:

• The company does not have shareholders or share capital. Instead, it has guarantors (members) who agree to pay a guaranteed amount (typically a nominal sum) if the company is wound up.

• There are no shares, so profits generally are not distributed to members, any surplus stays within the organisation.

• This structure is typically used by non profit organisations, charities, clubs, associations, and community groups.

• Guarantors’ liability is limited to their agreed guarantee after that, personal assets are protected.

3. Registering using a home address

Many new business owners operate from home and use their residential address as the registered office. This is legally acceptable, but often done without fully understanding the implications; once registered, this address becomes part of the company’s public record.

A registered office address appears on the public register and is searchable by anyone online so before you officially register, it’s vital that you consider whether you want your home address to be accessible to the public or whether you would rather protect the privacy of yourself and your family by using a virtual office.

If you decide this after registering your business, you will need to pay an additional fee to have it changed.

If you’re unsure how to access a virtual office address, have a look at our handy guide: How do you hide your address if your company is registered to your home?

4. Misunderstanding the difference between directors and shareholders

It’s surprisingly easy for new business owners to misunderstand the difference between ownership and management.

A director is responsible for running the company and ensuring it complies with legal obligations. A shareholder owns part (or all) of the company.

One person can be both, and often is, but they are not the same role.

Before registering, you must agree on who owns what, who makes decisions, and how disagreements will be resolved.

Confusion tends to arise when:

• One founder assumes ownership automatically means decision making control

• Shares are split evenly without discussing voting rights

• Someone is appointed director without clarity on responsibilities

5. Forgetting to check for spelling errors

It may sound minor, but spelling mistakes during incorporation can be surprisingly disruptive.

A single typo in the company name, a director’s name, registered address or anything else becomes part of the official public record once the company is formed.

When you register a business, you will likely feel a combination of excitement and nerves, and even the most careful and detail oriented people can make accidental errors.

A tip we would recommend is employing a second pair of eyes to read through your application and assess on your behalf whether the information is correct. This could be your business partner or a formation agent. Either way, you will feel substantially more secure knowing that every piece of information entered is correct.

6. Registering before share allocations are agreed

This is one of the most common, and most avoidable, mistakes.

Founders sometimes rush to register their company before fully agreeing how shares will be divided. At the time, it may feel like a technical detail that can be sorted out later but once shares are issued, changing ownership necessitates formal transfers and documentation.

Even for small startups, taking the time to document share agreements properly avoids misunderstandings later down the line.

Unclear share arrangements can lead to:

• Disputes over dividends

• Tension about voting power

• Difficulty bringing in investors

• Imbalanced control within the business

7. Only issuing one share

Issuing more shares (e.g., 100) provides flexibility for future changes in ownership. If you are uncertain about share agreements or shareholding is out of your area of expertise, then you should always hire an expert to make sure that the business is set up in the most effective manner.

8. Forgetting to register for corporation tax

Forming a company is only the first step. After incorporation, you must also ensure the business is registered for Corporation Tax with HM Revenue & Customs.

Some new directors assume this happens automatically. While systems are connected, the responsibility ultimately sits with the company. Failing to register or missing filing deadlines can result in penalties, even if the company has made no profit.

9. Registering your business alone

There is nothing legally stopping you from registering your company yourself. The online incorporation process via Companies House is designed to be accessible and user friendly.

However, any first time founders underestimate how many legal and structural decisions sit behind what appears to be a straightforward form. Incorporation involves making formal declarations about:

• Share capital and ownership structure

• Director appointments and responsibilities

• Registered office and service addresses

• Articles of Association

• Statement of capital

• People with Significant Control (PSC)

Each of these has legal implications.

When registering alone, common problems include:

• Accepting default model articles without understanding what they allow (or restrict)

• Issuing shares in a way that complicates future investment

• Entering incorrect SIC codes that do not reflect the company’s activities

• Failing to consider post incorporation obligations such as Corporation Tax registration with HM Revenue & Customs

• Missing the opportunity to put foundational agreements in place between co-founders

There is also the practical reality that correcting mistakes after incorporation can be more time consuming and more expensive than getting the details right initially.

Registering independently may work perfectly for experienced directors who fully understand their obligations. But for new entrepreneurs, particularly those setting up their first limited company, having guidance at the formation stage reduces uncertainty and helps avoid preventable errors. At 99p Company Formations, this is something we know all too well.

If you prefer a simplified, supported experience that removes the margin of error from your Companies House registrations, then you’re in the right place. We offer fast, affordable incorporation services with optional add ons to help your business stay compliant from day one.

We offer full registration services that help you begin trading without the administrative hassle.

Join over 5000 business owners who have successfully set up their business with our trusted formation service today.