Buyers ask for documents to verify the business, its financial claims, assets, liabilities, staff, contracts and transferability before committing to completion. Knowing what they will ask for — and having it ready — is one of the most important things a seller can do.
Quick Answer
Buyers typically ask for filed accounts, current management accounts, VAT returns, payroll records, the lease, key customer and supplier contracts, employment contracts, an asset list, a stock summary, tax and HMRC records, licences and permits, Companies House documents, insurance policies, and a high-level handover plan. The exact documents requested vary by business type and transaction size, but these categories cover the majority of due diligence requests in most small business sales.
Sellers who have these documents organised before listing — rather than scrambling to locate them after a buyer asks — move through the sale process faster and create a stronger impression of a prepared, professional seller.
Contents
Why buyers need documents
A buyer making a significant financial decision cannot rely on a seller's verbal assurances. They need to verify that the business is what they have been told it is — that the profit is real, the assets exist, the contracts are transferable, and that there are no significant undisclosed liabilities.
This verification process is called due diligence, and it is document-driven. The documents a buyer requests allow them and their advisers — typically an accountant and a solicitor — to build a factual picture of what they are acquiring. Gaps in the document pack create questions. Unexplained discrepancies create concern. Delays in providing documents erode confidence.
A seller who anticipates what documents will be needed, organises them in advance, and can produce them promptly when asked will move through the due diligence process significantly faster than one who has to locate and gather documents reactively. The time saved is not just operational — it translates directly into fewer opportunities for deals to lose momentum.
Financial documents
Financial documents are the core of due diligence and typically the first category buyers request in detail.
Filed accounts.Buyers will want at least two, and ideally three, years of filed statutory accounts — profit and loss, balance sheet and notes. These give the buyer a formal, audited or accountant-prepared record of the business's financial position over time.
Management accounts.Current management accounts — typically covering the most recent twelve months to the last month-end — allow buyers to see how the business is trading now, not just how it traded in the last filed year. If the most recent filed accounts are more than six months old, current management accounts become particularly important.
Revenue breakdown.Buyers often request a month-by-month revenue analysis, ideally broken down by product, service or customer category. This allows them to assess seasonality, concentration risk, and trends in the revenue stream.
Add-back schedule.A clear, evidenced schedule of add-backs — the owner's salary adjustment, personal expenses and one-off costs that have been stripped from reported net profit — will be scrutinised carefully. Each add-back should have a supporting document or explanation.
Debtor and creditor reports.The aged debtors report shows what customers currently owe. The aged creditors report shows what the business currently owes to suppliers. Together they give a picture of working capital and cash flow quality.
Bank statements.Not always requested, but buyers or lenders may ask for three to twelve months of business bank statements to verify revenue and profit claims.
Tax documents
Tax documents are an important component of due diligence, particularly in a share sale where the buyer is acquiring the company with its full tax history.
VAT returns.If the business is VAT-registered, buyers will want to see the most recent few years of VAT returns. These are cross-referenced with the stated revenue to check consistency. Unexplained discrepancies between VAT returns and accounts are a common due diligence concern.
PAYE and payroll records.Payroll history confirms the number of employees, their pay rates, and whether PAYE and National Insurance have been properly accounted for. Arrears or inconsistencies here will create questions.
Corporation Tax returns.For limited companies, corporation tax returns and any correspondence with HMRC may be requested.
HMRC correspondence.Any letters, notices or settlement agreements from HMRC — including payment arrangements, tax investigations, VAT assessments or penalty notices — should be disclosed.
CIS records.If the business uses subcontractors under the Construction Industry Scheme, CIS compliance records will be relevant.
Legal and company documents
Companies House documents.For a limited company, the certificate of incorporation, memorandum and articles of association, confirmation statements, and any charges registered at Companies House are standard requests. Buyers check these to understand the legal structure and any encumbrances on the company's assets.
Lease.The commercial lease is one of the most important documents in most business sales. Buyers want to see the full document including all schedules, any deed of variation, and any landlord correspondence. They will check the remaining term, rent level, service charge, business rates, break clauses, rent review dates, and whether the lease can be assigned to a new owner.
Customer contracts.Key customer contracts are reviewed for assignability, term, pricing, exclusivity clauses and change-of-control provisions. Buyers want to know whether customers can exit following a business sale, or whether their custom is contractually committed.
Supplier contracts.Major supplier agreements are reviewed for term, pricing, minimum order commitments and exclusivity provisions.
Finance agreements.Any loans, overdrafts, hire purchase agreements, asset finance or equipment leases will be reviewed. Buyers want to understand which assets are owned outright and which are subject to outstanding finance.
Insurance policies.Public liability, employers' liability, professional indemnity and other insurance policies are checked for currency and coverage.
Licences and permits.Any premises licence, food hygiene rating, sector-specific regulatory approval, franchise agreement or professional registration will be requested. Buyers need to understand whether these transfer with the business or require a new application.
Shareholder or partnership agreements.Where relevant, these documents govern the ownership structure and any rights affecting the sale.
Disputes and claims.Buyers will ask whether there are any ongoing or threatened legal claims, employment tribunal proceedings, customer disputes, or regulatory investigations.
Staff documents
Staff-related due diligence is particularly relevant where TUPE applies — which it does in most business sales involving employees.
Employment contracts.Buyers want to see written employment contracts for all staff, confirming terms, pay, hours, notice periods and any restrictive covenants.
Payroll summary.A summary of current salaries, contracted hours, job titles and start dates for each employee.
Holiday pay records.Accrued but untaken holiday is a liability that transfers under TUPE. Buyers want to understand what is owed.
Pension records.Workplace pension enrolment status, contribution rates and any outstanding pension contributions.
Staff list with roles and start dates.A clear staff list that allows the buyer to assess the team structure and the length of service distribution.
Key personnel information.Buyers want to understand which staff members are critical to the business operations and what their likelihood of remaining after the sale is.
Customer and supplier documents
The full customer and supplier information typically comes later in the process — after NDA and, in many cases, not until due diligence is formally underway.
At the early stages, buyers will typically accept anonymised summaries: the top ten customers by revenue (by type or anonymised code rather than name), the proportion of revenue represented by the top three customers, average customer tenure, and the general nature of customer relationships.
At due diligence stage, buyers may request: the customer database or CRM data (subject to data protection); specific customer contract documents for major accounts; a list of lapsed or at-risk customers; and information about any planned customer changes.
For suppliers, buyers typically want a list of key suppliers, the nature of the relationships, credit terms in place, and copies of major supply agreements. They are particularly interested in whether any critical supplier relationships are personal to the current owner, and whether supplier credit will continue on the same terms after a change of ownership.
Assets and stock
Asset list.A list of significant business assets — equipment, vehicles, fixtures, fittings, tools, machinery — with approximate ages and conditions, and a note of whether each is owned outright or subject to finance.
Maintenance and service records.For equipment, vehicles and machinery, maintenance histories can support the claimed condition and provide evidence that assets have been properly maintained.
Stock valuation.The value of current stock, the basis of the valuation, and any identification of obsolete or slow-moving stock that should be written down or excluded.
Work in progress schedule.For businesses with ongoing jobs or projects, a WIP schedule showing the stage, expected revenue and cost of current projects.
Systems and handover documents
At due diligence and completion, buyers typically need:
Systems list.A list of all software, platforms and digital tools used in the business — including the website and domain, email accounts, CRM system, EPOS or booking platform, payment processor, social media accounts and Google Business Profile.
Access transfer plan.A plan for how digital access will be securely transferred at completion. Passwords and access credentials should not be transferred before legal completion.
Process documentation.Any operational manuals, process notes, training materials or written procedures that help a new owner understand how the business runs.
Handover plan.Who will introduce the buyer to customers, when staff will be told, what training will be provided, and how long the seller will remain available.
When to share what
Not all of these documents should be provided at the same time or to the same level of buyer. The general principle is staged disclosure:
Early stage (listing and first enquiry): financial summary only — no accounts, no contracts, no staff or customer names.
After NDA: management accounts, add-back schedule, financial summary, asset and stock summary, high-level lease and contracts overview.
After offer and heads of terms: full filed accounts, full lease, key customer and supplier contracts, staff summary, tax records, HMRC position.
Full due diligence access: complete document pack as listed above, with adviser oversight on both sides.
Document checklist
Last three years of filed accounts (or available period).
Current management accounts.
Revenue and profit breakdown.
Add-back schedule with supporting evidence.
Debtor and creditor reports.
VAT returns (last two to three years).
PAYE and payroll records.
HMRC correspondence and any arrears schedule.
Companies House documents.
Full lease including schedules.
Key customer contracts.
Key supplier contracts.
Finance and hire purchase agreements.
Insurance policies.
Licences and permits.
Employment contracts for all staff.
Staff list with pay, hours and start dates.
Holiday pay and pension records.
Asset list with finance status.
Stock valuation.
Systems list and access plan.
Handover notes and plan.
FAQs
Do I need all these documents before listing?
You do not need to have them all polished and ready to share on day one of listing. But you should have gathered and organised them before you receive a serious buyer enquiry. Being able to provide documents promptly when asked is a significant competitive advantage.
Should I share sensitive documents early in the process?
No. Use staged disclosure. Financial summaries can be shared after initial screening. Full accounts, contracts, staff records and customer data should be reserved for screened, identified buyers at the appropriate stage, usually after an NDA and in some cases not until after an offer in principle.
What if I cannot find a document a buyer asks for?
Be honest about it and work to retrieve or reconstruct it. A missing contract can sometimes be reconstructed from correspondence or from the counterparty. A missing employment contract may need to be replaced with a new one. A missing lease can be obtained from the Land Registry. The key is to be transparent about the gap and to address it as quickly as possible.
Will buyers always ask for everything on this list?
The level of due diligence varies by transaction size and buyer type. A first-time buyer purchasing a small business with a cash buyer will typically request less than an experienced acquirer or a buyer using acquisition finance whose lender requires a full due diligence pack. Use this list as a comprehensive guide, but expect the specific requests in any given sale to be a subset of it.
Key takeaways
Buyers need documents to verify the business before completing. The core categories are financial records, tax records, legal and company documents, staff records, customer and supplier information, assets and stock, and systems and handover materials. Having these organised before listing allows the seller to respond to due diligence requests promptly, maintain buyer confidence and reduce unnecessary delays. Share documents in stages — not all at once and not before the buyer has been screened and the appropriate confidentiality agreements are in place.
Related resources
Important disclaimer
Buy a Business Ltd is a marketplace, not a broker, corporate finance adviser, M&A adviser, law firm, accountant, tax adviser, lender, valuation firm or investment adviser. Information, guides, checklists and examples on this site are for general guidance only and do not constitute legal, tax, financial, investment, lending, valuation, employment, data protection, brokerage, corporate finance, M&A or regulated advice.
Buying or selling a business involves risk. You should seek independent professional advice before buying, selling, valuing or financing a business.
Sources and useful references
Companies House: Get information about a company
GOV.UK: Business transfers, takeovers and TUPE
ICO: Due diligence when sharing data following mergers and acquisitions