Accounting Records You Must Keep: A Practical Guide for UK Companies

Good accounting records are more than a bookkeeping requirement. They are the evidence behind your company’s tax returns, annual accounts, financial decisions and, if necessary, your defence during an HMRC compliance check. For UK limited companies, the basic rule is straightforward: you must keep adequate accounting records that show and explain the company’s transactions and allow its directors to prepare accounts that comply with company law.

But what exactly counts as an accounting record? How long must you keep invoices, bank statements and receipts? Can records be stored digitally? And what happens if records are lost? This guide explains what UK companies should keep, how to organise it, and the retention periods that matter.

What Are Accounting Records?

Accounting records are the financial information and supporting documents a company needs to understand its financial position and prepare accurate accounts and tax returns. Under the Companies Act 2006, companies must maintain sufficient records to show and explain their transactions and enable directors to ensure that statutory accounts comply with the law. For a typical small company, this could include:

• Sales invoices and customer records
• Purchase invoices and supplier bills
• Business bank statements
• Receipts and expense records
• Payroll and salary information
• Records of money received and spent
• Details of company assets
• Records of debts owed by or to the company
• Stock records, where relevant
• Loan and finance documentation
• Contracts and supporting correspondence
• VAT records, if the company is VAT registered
• Calculations and documents supporting the Company Tax Return

The important point is that there is no single "accounting records folder" prescribed for every business. The records you need depend on what your company does and the complexity of its financial affairs. HMRC explains that records should be sufficient to support accurate and complete tax returns and allow the correct tax or duty to be calculated.

What Accounting Records Must a UK Company Keep?

1. Money Received and Spent

Your company should have a clear record of every significant financial transaction. This includes:

• Customer payments
• Supplier payments
• Business expenses
• Bank charges
• Loan receipts and repayments
• Director payments
• Grants
• Tax payments and refunds
• Dividends and other shareholder-related transactions

The record should make it possible to understand what happened, when it happened, how much was involved and why the transaction took place. For example, a bank statement showing a £750 payment to a supplier is useful, but the supporting supplier invoice provides additional evidence of what the £750 was actually for.

2. Sales Invoices and Income Records

Businesses should retain records supporting their income, including invoices issued to customers and other evidence of sales. Depending on the business, this might include:

• Sales invoices
• Contracts
• Customer purchase orders
• Till records
• Payment processor reports
• Sales ledgers
• Credit notes
• Receipts
• Online marketplace statements

A digital business receiving payments through platforms such as Stripe, PayPal or an online marketplace should not rely solely on the bank statement. Keep the relevant platform reports as well.

3. Purchase Invoices and Expense Evidence

For every business expense, retain enough evidence to demonstrate what was purchased and why it relates to the company. Common examples include:

• Office rent
• Software subscriptions
• Advertising
• Professional fees
• Travel
• Equipment
• Insurance
• Telephone and internet costs
• Professional memberships
• Business supplies

A simple rule is useful: if an expense reduces your company's taxable profit, keep evidence supporting it. A bank transaction labelled "Amazon" or "Google" may not explain sufficiently what was purchased. The underlying invoice or receipt can fill that gap.

4. Bank Statements

Business bank statements are among the most important records a company can maintain. They help reconcile the accounting system to the actual movement of money and can support:

• Sales receipts
• Supplier payments
• Tax payments
• Director transactions
• Loan repayments
• Bank charges
• Transfers between accounts

UK companies should keep their business finances separate from the personal finances of directors and shareholders. GOV.UK specifically recommends using a business bank account to maintain this separation.

5. Records of Assets and Liabilities

Companies must keep records showing the assets they own and the liabilities they owe.

Assets might include:

• Computers
• Machinery
• Vehicles
• Office equipment
• Property
• Inventory
• Long-term investments

Liabilities could include:

• Bank loans
• Supplier balances
• Director loans
• Finance agreements
• Accrued expenses
• Other amounts owed

This information helps establish the company's financial position and supports the figures appearing in its accounts.

6. Stock and Inventory Records

If your company deals in goods, additional records may be required. These can include:

• Stock held at the end of the financial year
• Stocktaking records
• Goods purchased
• Goods sold
• Details identifying buyers and sellers, where applicable

For an e-commerce company, this can become particularly important. A business selling 2,000 products online should be able to explain how its year-end stock figure was calculated.

7. Payroll and Employment Records

Companies with employees should retain records supporting payroll calculations and payments. These can include:

• Salary information
• PAYE records
• National Insurance information
• Payroll reports
• Pension records
• Employee expense records
• Benefits information
• Relevant employment documentation

Payroll records are particularly important because mistakes can affect both the company's tax position and employees' personal tax records.

What Other Documents Should You Keep?

One of the most common mistakes is assuming that only documents labelled "accounts" need to be retained. In reality, supporting evidence can be just as important as the accounting entry itself. GOV.UK gives examples including receipts, petty cash records, orders, delivery notes, invoices, contracts, sales records, till rolls, bank statements and correspondence. A sensible company record system should therefore include four broad categories:

The objective is not to accumulate paperwork for its own sake. It is to preserve a reliable audit trail.

How Long Must UK Companies Keep Accounting Records?

This is an area where company law and tax rules can appear confusing because different minimum periods can apply. Under the Companies Act, a private company generally has to keep accounting records for three years from the date the records were made. Public companies generally have a six-year period.

However, Corporation Tax requirements can require companies to retain records for longer. HMRC states that companies generally need to retain records and supporting documents until the latest of the relevant six-year period after the end of the accounting period, the completion of an enquiry, or the end of the applicable enquiry window.

For practical purposes, this means a UK private limited company should generally adopt a six-year retention policy for tax and accounting records, while checking whether particular records need to be kept longer. GOV.UK also notes circumstances where records may need to be retained for longer, including transactions spanning accounting periods, certain long-term assets, late Company Tax Returns and ongoing HMRC compliance checks.

Why the Six-Year Approach Is Safer

Imagine a company has an accounting period ending 31 December 2025. Instead of deleting records after three years simply because the Companies Act minimum has been reached, keeping the accounting and tax evidence for at least six years provides a more practical compliance buffer. It also avoids the problem of having one set of records retained for company-law purposes and another set retained for tax purposes.

What About VAT Records?

VAT-registered businesses have additional record-keeping responsibilities. VAT records generally have a six-year retention requirement, although HMRC can specify a shorter period in certain circumstances. VAT-related records can include:

• VAT invoices
• VAT calculations
• VAT account information
• Purchase and sales records
• Credit notes
• Import and export documentation
• Records supporting VAT claims

If a document serves multiple purposes, it is sensible to apply the longest relevant retention period. For example, an invoice could support both the company's Corporation Tax calculation and its VAT return. The company should therefore consider all applicable requirements before deleting it.

Can Accounting Records Be Stored Digitally?

Yes. Modern businesses do not generally need to maintain paper files for every transaction. Electronic accounting records can be maintained using appropriate accounting software, cloud storage or other digital systems. The critical issue is not whether the record is paper or digital. It is whether the company can retrieve reliable information and supporting evidence when needed. A good digital system should allow you to:

• Identify the transaction.
• Locate the supporting document.
• Establish the date and amount.
• Understand the business purpose.
• Reconcile the transaction to the company's accounts or bank records.

For example, if an accountant asks why £1,250 was spent six years ago, you should ideally be able to find the bank transaction, invoice and relevant explanation without reconstructing the entire history of the business.

What If Your Accounting Records Are Lost?

Records can disappear because of theft, accidental deletion, hardware failure, fire, cyber incidents or poor record management. If company records are lost, GOV.UK says the company should do its best to recreate them and notify the relevant Corporation Tax office. Possible reconstruction sources include:

• Bank statements
• Accounting software backups
• Supplier copies of invoices
• Customer invoices
• Payment processor reports
• Payroll providers
• Email correspondence
• Cloud storage
• Accountant records

Do not simply invent figures because the original evidence is unavailable. Reconstruct the records from the strongest available evidence and document how the figures were established.

Common Accounting Record-Keeping Mistakes

• Mixing personal and company spending: Using a personal bank account for company transactions makes reconciliation and evidence much harder.
• Keeping bank statements but deleting invoices: A bank statement proves money moved. It may not prove what the payment was for.
• Relying entirely on an accountant: Your accountant can prepare accounts and tax returns, but the company and its directors remain responsible for maintaining appropriate records.
• Deleting records too early: A three-year Companies Act period does not mean every record can safely be destroyed after three years. Tax and VAT requirements can extend the period.
• Poor digital backups: Storing everything on one laptop is not a proper continuity strategy.

A Practical Record-Keeping System for Small Companies

A straightforward system can work extremely well.

Monthly

• Reconcile bank accounts.
• Upload invoices and receipts.
• Review unpaid customer invoices.
• Record expenses.
• Check payroll entries.
• Save payment processor reports.

Quarterly

• Review VAT records if applicable.
• Check outstanding debts.
• Review director loan transactions.
• Back up accounting data.
• Investigate unusual transactions.

Annually

• Prepare year-end accounts.
• Reconcile balance sheet accounts.
• Review fixed assets.
• Confirm stock figures where applicable.
• Organise records for the Corporation Tax Return.
• Archive the completed financial year securely.

For founders, the biggest advantage is consistency. A business that files every receipt and reconciles its books monthly is far less likely to face a frantic document hunt at year-end.

What About Companies With Overseas Directors or Owners?

A UK company owned or managed by non-UK residents still needs appropriate UK company and tax records. This is particularly relevant to international founders using a UK company as part of a wider global business structure. The company may have UK accounting obligations even when its directors, shareholders, customers or suppliers are located overseas.

For global founders, the practical challenge is often coordination: UK accounting records may need to incorporate transactions from foreign bank accounts, payment platforms, currencies and group companies. IncorpUK, as a UK company formation and management platform for global founders, sits within this broader ecosystem, but record-keeping remains a responsibility of the company and its directors.

A Simple Accounting Records Checklist

Before considering your records complete, ask whether you can produce:

• [ ] Business bank statements
• [ ] Sales invoices
• [ ] Purchase invoices
• [ ] Receipts
• [ ] Expense records
• [ ] Customer and supplier records
• [ ] Contracts and relevant correspondence
• [ ] Payroll and PAYE information
• [ ] VAT records, if applicable
• [ ] Asset and liability records
• [ ] Stock records, if applicable
• [ ] Loan documentation
• [ ] Director loan records
• [ ] Dividend documentation
• [ ] Accounting ledgers and journals
• [ ] Year-end accounts
• [ ] Corporation Tax calculations and supporting documents
• [ ] Relevant payment processor reports
• [ ] Secure backups

The exact records required will vary according to the company's activities, tax obligations and accounting arrangements.

Frequently Asked Questions

How long must a UK company keep accounting records?

For tax purposes, companies generally need to retain relevant records for at least six years from the end of the relevant accounting period, subject to circumstances that can extend the period. Companies Act requirements can differ, so companies should consider both sets of rules.

Can I keep company records electronically?

Yes. Digital records can be used, provided they are reliable, accessible and sufficiently detailed to support the company's accounts and tax obligations.

Do I need to keep receipts for every business expense?

You should retain supporting evidence for business expenses. The precise documentation needed depends on the transaction, but receipts, invoices and other evidence can demonstrate what was purchased and why.

Does a dormant company need accounting records?

Yes. A company can have accounting-record obligations even when it is not actively trading. GOV.UK states that every company must keep accounting records, whether trading or not.

What happens if HMRC asks to see my records?

HMRC can check company records during a compliance check. The company should be able to provide appropriate records supporting its tax returns and calculations.

Do VAT records have to be kept for six years?

VAT records are generally subject to a six-year retention period, although HMRC can specify shorter periods in particular circumstances.

Who is responsible for keeping company accounting records?

The company's directors have responsibility for ensuring that appropriate accounting records are maintained. An accountant or bookkeeping service can help manage the process, but outsourcing the work does not remove the directors' underlying responsibilities.

Conclusion: Good Records Are a Business Asset

Accounting records are not simply documents to keep in case HMRC asks questions. They form the financial evidence behind a company's decisions, tax position and statutory reporting. For most UK companies, the safest approach is straightforward: keep complete records, retain supporting evidence, separate company and personal finances, reconcile accounts regularly and maintain secure digital backups.

Do not wait until the annual accounts deadline to discover that important invoices, receipts or transaction explanations are missing. A well-organised company should be able to answer three questions about almost any material transaction:

1. What happened?
2. How much was involved?
3. What evidence supports it?

If your records can answer those questions clearly, you are already building a much stronger foundation for accurate accounts, efficient tax reporting and long-term company compliance.