A stronger business sale starts before the listing goes live. Use this 90-day plan to organise financials, valuation, documents, contracts, staff information, confidentiality, buyer screening and handover.
Quick Answer: How do you prepare a business for sale in 90 days?
To prepare a business for sale in 90 days, focus on making the business easier to understand, verify and transfer. In the first month, clean up accounts, financial evidence, valuation assumptions and core records. In the second month, organise contracts, lease, staff, assets, stock, digital access, compliance and sector-specific documents. In the third month, prepare the listing, confidentiality process, buyer screening, data room, adviser support and handover plan.
You do not need to make the business perfect. You need to make it credible, evidence-backed and easier for a serious buyer to check.
Contents
Why 90 days can make a real difference
Many businesses fail to sell not because the business is bad, but because the sale is poorly prepared. A buyer who encounters confusion early in the process will not push through it — they will simply move on to the next listing. First impressions in a business sale are built on paperwork, not personality.
Buyers lose confidence when accounts are messy, profit is unclear or add-backs are unsupported. They pull back when stock value is vague, contracts are missing or lease details are unknown. They hesitate when staff information is incomplete, owner dependency looks high, or customer data is handled carelessly. And they walk away when the seller cannot explain the valuation, documents arrive slowly, or there is no clear picture of what happens after completion.
None of those problems require a perfect business to solve. They require an organised one.
A 90-day preparation period gives you enough time to address those problems systematically before any buyer asks. It also gives you time to think clearly about the transaction — what you want from it, what you are willing to accept, and what professional support you need — rather than making reactive decisions under pressure once enquiries arrive.
The plan below divides the 90 days into six two-week blocks. Each block has a clear focus and a clear output. Work through them in order. If your business is already well organised in some areas, those blocks will go faster. If you find problems during preparation, it is far better to discover them now than during due diligence.
Days 1–15: clean the numbers
Start with the financials. Everything else in the sale process depends on the buyer being able to understand and verify your numbers. If the financial picture is unclear at the outset, buyers will either walk away or use that uncertainty to drive the price down.
Begin by gathering at least the last three years of filed accounts, if they are available. For newer businesses, use whatever period you have. Alongside the filed accounts, prepare a set of current management accounts — ideally covering the last 12 months to the most recent month-end — so buyers can see how the business is trading right now, not just how it traded in the last filed year.
Next, review revenue on a month-by-month basis. Look for patterns: is revenue growing, flat or declining? Is it seasonal? Are there months where revenue spiked due to one-off events? Buyers will ask about these, and you need clean answers ready.
Do the same for profit. Review gross margins line by line. Check whether payroll costs are fully captured, and whether personal expenses have been run through the business. Separate costs that are genuinely operational from those that are personal, one-off or inflated. Check VAT returns if the business is VAT-registered, and ensure bank statements can be reconciled to the accounts at a high level.
Review debtors and creditors carefully. Are there outstanding invoices that are unlikely to be collected? Are there liabilities that do not appear in the headline numbers? Check whether there are HMRC payment arrangements, finance agreements or director loan accounts that will need to be disclosed.
Finally, speak to your accountant. They can help you understand what is presentable, what needs explaining, and what adjustments are legitimate. This conversation is worth having before you speak to any buyer.
Output by day 15
By the end of this phase, you should have a clear financial pack that shows revenue, gross profit, net profit, owner salary or drawings, add-backs, debtors, creditors, debt, tax and VAT position, and recent trading trend. A buyer will not rely on your word that the business is doing well. They will want evidence, and that evidence needs to be ready.
Days 16–30: understand value and add-backs
Once the numbers are clean, work on valuation. Many sellers price on emotion — on what they need personally, or on what a neighbour got for their business, or on a number they read online. That approach causes problems. Buyers pay based on maintainable profit and evidence, not on the seller's financial requirements.
Read a business valuation guide. Understand the difference between revenue multiples and profit multiples, and how each applies to your type of business. Calculate your maintainable profit — the ongoing, normalised profit that a new owner could reasonably expect to receive after taking over.
Prepare an add-back schedule. Add-backs are legitimate adjustments that convert your reported profit into a more accurate picture of the business's earning power. Common add-backs include the owner's salary above a market replacement cost, personal expenses run through the business, one-off legal costs, redundancy payments and non-recurring items. Each add-back must be evidenced and explained. Buyers will challenge every one of them.
Be honest about owner dependency. If the business relies entirely on you for sales, key relationships or operational decisions, a buyer will factor that risk into their offer. Consider how that dependency can be reduced — or at least explained — before listing.
Review stock and assets. What is included in the asking price? What is included at valuation? Are there assets that are financed and will need to be cleared before completion? What is the current stock figure, and is it realistic?
Think about customer concentration. If one customer represents 30% or more of your revenue, a buyer will view that as a significant risk. Be prepared to address it honestly.
Output by day 30
By the end of this phase, you should be able to explain clearly how the asking price was calculated, what profit figure supports it, what assets are included, whether stock is included or separate, what risks may affect value, and what handover support is on offer. If you cannot explain these things confidently, a buyer certainly will not be able to make an informed decision — and they will either reduce their offer or walk away.
Days 31–45: organise legal, lease and contracts
Now turn your attention to the legal backbone of the business. This phase often uncovers the issues that cause sales to collapse — not because the business is broken, but because important documents are missing, unclear or contain transfer restrictions that nobody noticed.
Gather company documents: certificate of incorporation, memorandum and articles of association, shareholder agreements or partnership deeds if relevant. These are basic requirements for any due diligence process and should be readily available.
Review your customer contracts. Are they assignable to a new owner, or do they contain change-of-control clauses that require the customer's consent? Are any of them about to expire? Do they contain exclusivity arrangements or pricing commitments that a buyer needs to know about?
Do the same for supplier contracts. Check for minimum order commitments, notice periods and exclusivity provisions. Also review any finance agreements, hire purchase contracts or equipment leases, and note the remaining terms and whether they can be transferred.
The lease is often the most important single document in a business sale. If your business operates from leased premises, you need to understand the lease in detail before any buyer asks. Check the lease term remaining, rent level, service charge, business rates, break clauses and rent review dates. Most importantly, check whether the landlord's consent is required to assign the lease. If it is, start thinking now about how that process will work and how long it might take.
List all licences, permits and registrations the business holds — premises licences, food hygiene ratings, sector-specific regulatory approvals and so on. Consider whether any of these are personal to you rather than to the business, because personal licences typically cannot transfer.
Review insurance policies. Check that they are current and note what they cover. List any ongoing disputes, claims or complaints, including any employment tribunal proceedings. These must be disclosed.
Output by day 45
By the end of this phase, you should know what contracts exist, which are transferable, whether landlord consent is needed, what licences or approvals may affect the sale, what legal issues need to be disclosed, and which advisers need to be brought in. Discovering a lease problem or a non-assignable major contract after listing — when a buyer is already engaged — is one of the most damaging things that can happen to a sale.
Days 46–60: staff, assets, stock and systems
This phase is about making the business easier to hand over in practice — not just on paper.
Staff
Prepare a staff list showing each employee's role, salary, contracted hours, holiday entitlement, length of service and whether they are on a written contract. Gather those contracts. Check payroll records, pension contributions and holiday accrual to ensure they are up to date.
Think about TUPE — the Transfer of Undertakings (Protection of Employment) Regulations. In most business sales where staff are employed, TUPE applies and employees transfer automatically to the new owner on their existing terms. Take employment advice if you are unsure how this applies to your transaction.
Identify key staff members: people whose departure would significantly affect the business. A buyer will ask about them. Are they likely to stay after a sale? Do their employment contracts contain appropriate confidentiality or notice provisions?
Plan the timing of staff communication carefully. Telling staff too early can create uncertainty and resignations. Telling them too late can cause legal complications. This is an area where you should take professional advice.
Assets and stock
Prepare a detailed asset list: equipment, vehicles, fixtures, fittings, tools, machinery. For each, note its approximate age, condition and whether it is owned outright or subject to finance. Gather maintenance records and service histories where they exist.
Prepare a stock valuation. If stock fluctuates significantly, agree with your advisers how it will be treated at completion — typically either at cost or at a negotiated fixed figure. Identify any obsolete or slow-moving stock that should be written down or excluded from the valuation. Prepare a work-in-progress schedule if relevant to your business type.
Systems
List all software subscriptions, platforms and digital tools the business uses. Include the website and domain, email accounts, CRM, EPOS or booking systems, social media accounts, Google Business Profile, payment processor accounts and online marketplace accounts.
Think now about how access to these will transfer. Prepare a secure access-transfer plan, but do not share passwords or transfer access to any system before legal completion. Doing so prematurely is a common and avoidable mistake.
Output by day 60
By the end of this phase, you should have a practical handover map — a clear picture of who works in the business, what assets exist, what systems run it, and how those things transfer to a buyer. A business that is easy to understand is a business that is easier to sell.
Days 61–75: confidentiality, data room and listing
Now prepare to go to market. This phase is about deciding what information buyers receive, when they receive it, and how it is managed.
Confidentiality
Many sellers go to market without a confidentiality plan and end up sharing sensitive information with people who were never serious buyers — or, worse, with competitors who enquired under a false identity.
Decide what information can be publicly disclosed in a listing (general business description, revenue range, broad location, reason for sale) and what must remain confidential (accounts, customer details, supplier names, staff list, lease terms). Prepare an anonymised business summary that presents the opportunity compellingly without identifying the business. Prepare a non-disclosure agreement process so that detailed information is only shared with buyers who have signed an NDA and provided basic identification.
Decide in advance at what stage you will share full accounts, staff information, customer details and supplier information. These are typically shared in stages as a buyer progresses through screening, offer and due diligence — not all at once on first enquiry.
Data room
Create a simple, organised data room. This does not need to be a sophisticated platform — a clearly structured set of folders, whether on a secure cloud drive or a professional data room tool, will work well. Upload documents as you prepare them, separate sensitive files and set access permissions so that only appropriate parties can view appropriate materials.
Prepare redacted versions of key documents for early-stage disclosure, with full versions available post-offer. Keep a log of what has been shared, with whom, and when. This protects you legally and helps you manage the process cleanly.
Listing
Write a clear, honest listing. Use a broad location if confidentiality matters. State clearly what is included in the sale — stock, assets, goodwill, intellectual property. Include a realistic financial summary: turnover, adjusted profit and the basis of the asking price.
Explain the reason for sale professionally and honestly. Buyers are suspicious of sellers who refuse to give a reason, and equally suspicious of reasons that sound rehearsed. State what growth opportunities exist — but do so honestly, not as a way of inflating the asking price. Avoid exaggerated claims. A buyer who feels misled in the listing will become a difficult negotiating partner.
Include information about handover support. What are you willing to offer — a period of training, introductions to key customers, continued availability for questions? This reassures buyers who are concerned about the transition.
Output by day 75
By the end of this phase, you should be ready to publish your listing or discuss with a broker or adviser. All core documents should be organised and accessible.
Days 76–90: buyer screening and handover readiness
The final phase prepares you for actual buyer conversations. This is where many unprepared sellers make avoidable mistakes — sharing too much information too soon, failing to verify buyers, or agreeing terms before understanding the implications.
Buyer screening
Prepare a set of initial questions for enquiring buyers. At a minimum, you want to understand why they are interested, what their background is, whether they have relevant experience, and whether they have access to funding. This does not need to be a formal questionnaire at first enquiry — but it should become one before you share financial information.
Decide your proof-of-funds requirements. At what stage will you ask a buyer to evidence that they can fund the transaction? Most sellers reasonably require this before entering exclusivity or allowing full due diligence access.
Prepare your NDA template and response templates for common buyer enquiries. Prepare staged disclosure rules — a clear internal rule about what gets shared at each stage of buyer engagement. This prevents the common situation where a seller shares everything with the first interested buyer and then discovers they were not serious.
Think through your walk-away price and terms before you receive any offers. Knowing in advance what you will and will not accept means you are negotiating from a clear position rather than making emotional decisions in the moment.
Handover
Prepare a handover plan. This should include how you will introduce the buyer to key customers, suppliers and staff, and in what order. Think about what the buyer's first week will look like and what they will need from you to get started smoothly.
Prepare a systems transfer checklist that covers every account, login and platform that needs to change hands at or after completion. Prepare a post-completion support offer — how long are you willing to remain available, in what capacity, and at what cost if any?
List emergency contacts: key staff, main suppliers, accountant, solicitor, bank contact, HMRC reference numbers.
Output by day 90
By the end of this phase, you should be ready for serious buyer conversations. You have clean financials, an evidenced valuation, organised documents, a confidentiality plan, a staged disclosure process and a handover plan. You are not hoping a buyer will trust you. You are showing them that trust is warranted.
What not to do in the 90 days
Preparation means more than organising paperwork. It also means avoiding the mistakes that derail sales.
Do not inflate profit figures or invent add-backs. Buyers verify, accountants verify, and solicitors will find inconsistencies during due diligence. A sale that collapses at due diligence is worse than a lower price from the start.
Do not hide debts, tax arrears or HMRC payment arrangements. These will be discovered. Disclosing them honestly upfront, with a clear explanation, is far less damaging than a buyer finding them unexpectedly and losing confidence in everything else you have told them.
Do not ignore lease problems. If there is a short lease, a pending rent review, a difficult landlord, or a restriction on assignment, these need to be dealt with before the listing goes live — not after a buyer has spent weeks doing due diligence.
Do not tell staff about the sale without a clear plan and, where relevant, legal advice. A premature disclosure can trigger resignations, TUPE complications or a loss of buyer confidence if key staff leave before completion.
Do not share customer data, supplier names or detailed operational information until a buyer has signed an NDA and demonstrated genuine interest. Data protection obligations apply during a business sale just as they do at any other time.
Do not copy another business's listing. Buyers search multiple platforms and will notice. Write your own description honestly.
Do not accept the first offer without checking the buyer's credentials, funding and intentions. Speed of offer does not equal quality of buyer.
Do not give exclusivity to an unverified buyer. Exclusivity locks you out of other conversations. It should only be granted once a buyer has demonstrated they are serious, funded and credible.
Do not avoid professional advice to save money. A solicitor, accountant and potentially a business broker will more than recover their costs by helping you avoid the mistakes that collapse sales.
90-day preparation checklist
Financial
Last three years of accounts gathered.
Current management accounts prepared.
VAT and tax position checked.
Add-backs identified and evidenced.
Valuation basis prepared and explainable.
Debtors and creditors reviewed.
Stock and WIP reviewed and valued.
Legal and contracts
Lease reviewed: term, rent, assignment requirements.
Customer contracts gathered and assignability checked.
Supplier contracts gathered and reviewed.
Licences, permits and registrations listed.
Insurance policies gathered and reviewed.
Disputes and claims identified and logged.
Staff and operations
Staff list and employment contracts prepared.
Payroll, pension and holiday records checked.
TUPE implications considered with appropriate advice.
Asset list prepared with finance status noted.
Systems list prepared with access-transfer plan.
Handover plan drafted.
Sale process
Listing drafted with honest financial summary.
Confidentiality plan prepared.
NDA process ready.
Data room created and documents uploaded.
Buyer screening questions and staged disclosure rules ready.
Professional adviser support identified and engaged.
FAQs
Can I prepare a business for sale in less than 90 days?
Yes, if your records are already organised and your business is straightforward. But 90 days gives most sellers enough time to clean financial records, organise documents, identify and address problems, and build the evidence base that serious buyers need. Rushing preparation is one of the most common reasons business sales collapse at due diligence.
Should I get a valuation before preparing documents?
You can get an early indicative estimate. But a credible valuation depends on clean financial evidence. It is better to prepare your accounts and add-back schedule first, then work on valuation — rather than putting an asking price on the business and then scrambling to support it.
Should I tell staff during the 90 days?
In most cases, no — not without advice and a plan. Staff communication depends on the nature of the transaction, the number of employees, and your legal obligations. Tell staff too early and you risk losing key people before the sale completes. Get employment advice before making any disclosure.
Should I create a data room before listing?
Yes — internally. You should have all your documents organised and accessible before any buyer asks. But only give buyers access to the data room at the appropriate stage, after screening and NDA. Do not make documents publicly available.
What is the most important preparation step?
Clean financials. Everything else in the sale — valuation, buyer confidence, due diligence, heads of terms — depends on buyers being able to understand and verify your profit. If they cannot verify it, they cannot price it, and the sale stalls.
Key takeaways
A prepared business is materially easier to sell than an unprepared one. The first 30 days should focus entirely on accounts, financial evidence and valuation. The second 30 days should focus on contracts, lease, staff, assets and systems. The final 30 days should focus on listing preparation, confidentiality, buyer screening and handover planning.
Buyers make decisions based on evidence, not on trust. The purpose of preparation is not to make the business look perfect — it is to make it honest, organised and transferable. A business that a buyer can understand, verify and step into is a business that sells.
Professional advice should start before heads of terms, not after. Engaging a solicitor, accountant and possibly a business broker early in the process will cost less than managing the consequences of avoidable mistakes later.
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, templates, 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.
Tax, VAT, Companies House, data protection and business-sale rules can change and depend on your circumstances. You should seek independent professional advice before buying, selling, valuing, financing, negotiating or completing a business purchase.
Sources and useful references
Companies House: Get information about a company
GOV.UK: Business transfers, takeovers and TUPE
GOV.UK: VAT registration and deregistration threshold changes
HMRC/GOV.UK: Transfer a business as a going concern and VAT Notice 700/9
ICO: Due diligence when sharing data following mergers and acquisitions