How to Set Up a Limited Company as a First-Time Contractor

How to set up a limited company as a first-time contractor

Moving from permanent employment (or from umbrella working) into contracting often starts with one practical question: how do you actually set up a limited company? The mechanics are straightforward once broken down into steps, but there are a few details, particularly around identity checks and tax registration deadlines, that catch first-timers out.

This guide walks through the process in order. It is educational only. It does not tell you whether you should contract via a limited company rather than an umbrella, and it does not assess your IR35 status. For that, see our guides on outside IR35 contracting basics and speak to a contractor accountant.

Step 1: Check a limited company is the right structure

Before you incorporate anything, GOV.UK's own step-by-step guidance on setting up a limited company starts with confirming that a limited company structure actually suits your situation, rather than jumping straight to registration. This matters because a limited company is a distinct legal entity, separate from you personally, with its own filing obligations, director duties, and (for contractors) IR35 considerations that don't apply in the same way to sole traders or umbrella employees.

If you're comparing structures, this is also the point to think about how your day rate, contract length, and client sector might affect your IR35 position, since that can influence how you and your accountant plan around limited company use.

Step 2: Choose a company name and registered office

Once you've decided to incorporate, business.gov.uk's guidance on setting up a formal business sets out the practical building blocks you need before registration:

• A company name that meets Companies House naming rules (no offensive terms, no implying a false status, and it must not be too similar to an existing registered name).
• A registered office address. Note that this address is published online and visible to anyone who searches the register, so many contractors use an accountant's address rather than a home address.
• A separate business bank account, kept apart from personal finances.
• Directors and shareholders (for many first-time contractors, this is simply themselves).
• Anyone who counts as a "person with significant control" (PSC), typically the contractor themselves if they own more than 25% of shares or voting rights.

This is also where registering a PSC at Companies House becomes relevant: as part of incorporation you must identify and record anyone with significant control over the company, not just list directors.

Step 3: Prepare your incorporation documents

You'll also need a memorandum and articles of association (standard templates are available and suit most one-person contractor companies) and a SIC code describing the nature of your business activity, as detailed in the same business.gov.uk guidance above.

Step 4: Register the company with Companies House

This is the core of how to incorporate as a contractor. GOV.UK's company registration service confirms that a private limited company can be registered online. According to Companies House's IN01 guidance, the online registration route costs £100.

Identity verification may be required before registration goes through, so have proof of identity ready for directors and PSCs. If you'd rather not use the online route, Companies House also lists paper forms for limited companies, including the IN01 form, though this is generally slower.

These are the practical first-time contractor limited company steps: name and office address decided, PSC identified, documents prepared, then submission to Companies House either online or by form.

Step 5: Register for Corporation Tax with HMRC

Once your company is incorporated, it isn't automatically registered for tax. HMRC's Corporation Tax guidance states that the best way to register is through HMRC's online service, though it can also be done in writing. A written registration must include the company name and registration number, the accounting period start date, the intended accounts date, the principal place of business, the nature of the business, and directors' names and home addresses.

Timing matters here: guidance from the Business Growth Service confirms that a company must register for Corporation Tax within three months of starting to trade or becoming active. Many contractors treat their first invoice, or the start of their first contract, as the trigger date for this three-month clock, though your accountant can confirm exactly when your company became active.

After incorporation: what changes for IR35

Once your limited company exists and is registered for Corporation Tax, you'll typically also need to register for VAT (if applicable), set up PAYE if you plan to pay yourself a salary, and open the business bank account referenced above. From here, every contract you take on will need its own IR35 assessment: the end client is responsible for issuing a Status Determination Statement, and any claim that a role sits outside IR35 is the client's assessment, not something this platform or any job board can confirm.

If you're browsing your first contracts, our outside IR35 job listings and day-rate benchmarks are a useful starting point, alongside our related guides on how substitution and control clauses are assessed under current HMRC approaches (reflecting principles from cases such as PGMOL).

This platform does not determine, verify, or warrant IR35 status; the SDS is the client's legal responsibility. Contractors should take their own advice and consider IR35 insurance.