Preparing your business for sale
What to do in the 6 to 12 months before listing your business, to maximise the price, shorten the sale, and minimise surprises in diligence.
Overview
The single biggest predictor of how quickly and cleanly your business sells is how well-prepared it is before you list. Buyers reward businesses that present themselves clearly: clean accounts, documented processes, transferable client relationships, transparent contracts. They discount or walk away from businesses that surface surprises in diligence.
What follows is a 6 to 12 month preparation checklist for UK owner-operators. Not all of it applies to every business, but most items pay back many times their cost in either price uplift or in deals that hold together when due diligence starts.
Twelve months out: clean the numbers
Run your management accounts monthly. Buyers want to see at least 24 months of consistent monthly figures, ideally exported from accounting software (Xero, QuickBooks, Sage) rather than reconstructed from bank statements. If you have not been doing this, start now and you will have a clean set by listing date.
Strip personal expenses from the P&L where possible. The remaining genuine addbacks (your above-market salary, vehicle costs, family on payroll) get documented for the buyer's diligence file. The cleaner the underlying numbers, the smaller the addback list, the more credible the valuation.
Nine months out: document the business
Write down what you do daily, weekly, monthly. Even a rough Google Doc-level operations manual is better than nothing. The goal is to show a buyer that the business has a documented operating system rather than everything in your head. This is the single biggest lever on owner-dependence risk, which is the single biggest discount factor on small business valuations.
If you have not already, get key suppliers and customers onto written agreements rather than verbal arrangements. Buyers will not pay for relationships that walk out the door when you do.
Six months out: tidy the legal and contractual position
Get your lease in front of your solicitor. Confirm assignment provisions, rent reviews, break clauses, and any landlord consents needed for change of ownership. Same for any other key contracts (supplier agreements, customer contracts, equipment finance, licensing).
Review your employment contracts. Check restrictive covenants on key staff, document any informal arrangements (unwritten bonuses, time off, flexible hours), and clean up any open HR matters. Most buyers will take staff on TUPE, but they want to know what they are inheriting.
Three months out: prepare the diligence pack
By now you should have a clear sense of when you want to list. Three months before, start assembling the diligence pack as a structured folder. Most of these are not pre-built; you assemble them as you go:
- Last three years of accounts plus 12-24 months of monthly management figures
- Fixed asset register with age, condition, book value, outstanding finance
- Customer list (anonymised) showing fees billed per customer over three years
- Supplier list with payment terms and any open issues
- All material contracts (employment, lease, supplier, customer, finance)
- IP register (trademarks, domains, code, brand assets)
- Insurance summary including any open claims
- Tax position including any open HMRC matters
- Compliance position (regulatory, certifications, audits)
Having this ready cuts your diligence period in half and signals professionalism.
One month out: brief the people who need to know
Decide who knows what and when. Common pattern: solicitor and accountant told early, key family told once heads of terms are agreed, senior staff told just before announcement, all staff told at announcement or just after. Premature disclosure damages trust internally and externally.
A few things commonly forgotten
- Your personal exit position: pension contributions, BADR eligibility, post-completion tax bill timing
- Domain and IP transfers, especially if you registered the domain in your personal name
- Subscription and software licences: which transfer with the business, which need new accounts
- Bank accounts and merchant terminals: timeline for transferring or closing
- Personal guarantees: identify any you have given on company debts; getting these released takes weeks
- Garden leave and post-employment restrictions you have personally: check before agreeing to consultancy work elsewhere post-sale
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Frequently asked questions
- How long does preparation actually take?
- Six months is realistic for a focused effort. Twelve months gives you room to demonstrate trend improvements in the accounts and to get the business genuinely less dependent on you. Sellers who skip preparation typically lose 6-12 months in diligence on the other end.
- Should I improve the business before selling, or sell as-is?
- Depends on time horizon and what improvement costs. Three to twelve months of small operational fixes (clean numbers, documented processes, key contracts) usually pay back several times their cost. Major investment (new equipment, brand refresh, expanding to new locations) rarely pays back if you sell within 18 months.
- What if I have to sell quickly?
- It is possible. Typical fast sales close in 3-4 months. You will likely accept a 10-20% discount on price for speed, and you should be ready for an extremely intense 4-6 week diligence period. Where possible, even a few weeks of preparation pay back.
- Do I need to do all of this if I am selling to a family member?
- Less of it, but more than you think. The diligence pack still helps for the bank loan (if the family member is borrowing), for the formal valuation that drives the share transfer price, and for the tax position (HMRC will scrutinise related-party deals). Skip the marketing prep; keep the operational and legal prep.
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Browse businesses for sale →Last reviewed 29 May 2026