Running a limited company in the UK comes with a significant amount of paperwork. From Companies House filings to HMRC correspondence, keeping your documents organised is not just good practice — it is essential for staying compliant, avoiding penalties, and running your business smoothly. Whether you are a sole director of a small company or managing a growing team, here is a clear guide to the key documents every UK director should have organised and accessible.
Certificate of Incorporation
Your certificate of incorporation is issued by Companies House when your company is first registered. It confirms your company name, company number, and the date of incorporation. Keep this document somewhere safe — you will need it when opening a business bank account, applying for finance, or proving your company's legal status to clients or suppliers.
Company Number
Your company number is a unique eight-digit identifier assigned to your company by Companies House. It never changes, even if you change your company name. You are legally required to display it on your website, emails, and business stationery. Make a note of it and ensure it appears wherever required.
Authentication Code
Your Companies House authentication code is a six-character code used to file documents and make changes to your company record online. Treat it like a password — keep it secure and do not share it unnecessarily. If you lose it, you can request a new one from Companies House, but this takes time and can delay important filings.
Unique Taxpayer Reference (UTR)
Your UTR is issued by HMRC when your company is registered for Corporation Tax. It is a ten-digit number used to identify your company for tax purposes. You will need it when filing your Company Tax Return and when communicating with HMRC. Keep it recorded securely alongside your other key numbers.
VAT Number
If your company is VAT registered, your VAT number must appear on all VAT invoices you issue. Keep a record of your VAT registration certificate and your VAT number. You will also need it when filing VAT returns through Making Tax Digital.
Bank Statements
Keep at least six years of business bank statements, either digitally or in hard copy. HMRC can request these during an investigation, and they are essential for reconciling your accounts and preparing your annual accounts and tax return. Most business bank accounts allow you to download statements as PDFs, which makes digital storage straightforward.
Business Insurance Documents
Keep copies of all your business insurance policies, including public liability, professional indemnity, and any employer's liability insurance if you have staff. Know your renewal dates and policy numbers, and store these documents somewhere you can access them quickly if you need to make a claim.
Contracts and Agreements
Any contracts you have signed with clients, suppliers, landlords, or service providers should be stored securely and organised by category. Contracts protect you if a dispute arises, and being able to locate them quickly can save significant time and stress.
Sales Invoices and Purchase Receipts
HMRC requires you to keep records of all business income and expenditure for at least six years. This includes sales invoices you have issued and receipts or invoices for any business expenses you have incurred. Organise these by tax year and keep both digital and physical copies where possible.
Confirmation Statement Records
Every year, you must file a confirmation statement with Companies House to confirm that your company's registered details are correct. Keep a copy of each confirmation statement you file, along with confirmation that it has been accepted. Missing this filing can result in your company being struck off the register.
Finance Documents
If your company has taken out a business loan, hire purchase agreement, or any other form of finance, keep all related documents organised. This includes loan agreements, repayment schedules, and correspondence with lenders. These documents are important for your accounts and for understanding your company's financial obligations.
Build a Simple Filing System
The easiest way to stay on top of your paperwork is to create a simple folder structure — either physically or digitally — with a folder for each category above. Set aside time each month to file new documents and review what needs attention. A small amount of regular organisation prevents the kind of backlog that becomes overwhelming at year end.
Need help managing your registered office address and Companies House correspondence? Spectre Offices handles your statutory mail and keeps your business address compliant. Find out more →
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