The honest answer is that the legal phase of a UK business sale takes weeks, while the deal itself takes months, because the elapsed time is set by whichever third party takes longest to say yes. On the sales we act on, documenting and completing a straightforward share sale once terms are agreed is usually six to eight weeks of work, and the gap between that and the nine or twelve months owners often report is almost always landlord consent, regulator approval, lender consent or company records that were never properly kept.
We want to be clear at the outset about which numbers in this article are law and which are experience. A small number of deadlines in a business sale are statutory and do not move: stamp duty is payable within 30 days of a stock transfer form being signed, a Stamp Duty Land Tax return is due within 14 days of the effective date of a property transaction, and certain Companies House filings are due within 14 days. Everything else, including every stage length in the indicative timetable below, is our own practice experience of acting for buyers and sellers of owner-managed businesses. We have deliberately not reproduced the “average time to sell a business” figures that circulate online, because we have never seen one of them traced to a source worth relying on.
Why no one can give you a completion date at the outset
A business sale is not one process. It is a commercial process (finding a buyer and agreeing a price), a legal process (investigating the business and documenting the deal), and a consents process (getting permission from everyone whose agreement the deal depends on). The first and third of those are not within your solicitor’s control, and the third is the one that most often decides when you complete.
This matters because it tells you where to spend your effort. Owners frequently ask us how to make the legal stage faster. Almost always, the better question is what can be started earlier: the lease consent application, the regulator’s change of ownership application, the lender’s change of control approval, and the tidying up of the company’s own records. Work done before a buyer is found costs you nothing in deal momentum. Work discovered after heads of terms are signed costs you weeks.
An indicative business sale timetable
The visual below separates the two kinds of timing in a sale. The upper block is the variable stages, where the duration depends on your business, your buyer and the people whose consent you need. The lower block is the fixed statutory deadlines, which are counted from a trigger date and apply whether or not the deal has been convenient.
Business sale timetable
Indicative only. The stage lengths in the upper block are drawn from our own experience of acting on owner-managed business sales. They are not an average, a benchmark or a published statistic, and your sale may sit outside every range shown. The deadlines in the lower block are statutory and do not move.
Variable stages · set by people, not by law
Fixed statutory deadlines · counted from a trigger date
Each of those statutory deadlines is sourced in the table further down this article. Note how few of them there are, and how late most of them bite. The parts of a sale that owners worry about are not the parts the law puts a clock on.
Stage by stage: what actually drives the elapsed time
1. Preparation and vendor due diligence
What drives the time here is the state of your paperwork, not the size of your business. The work is to assemble what a buyer will ask for and fix what is wrong before they see it: statutory registers that match reality, share certificates that exist, board minutes approving past share transfers, signed employment contracts for everyone on the payroll, a complete set of leases and licences, and clear title to intellectual property that in many SMEs sits in a founder’s personal name or a freelancer’s.
A company whose records have been kept properly can be ready in a few weeks. A company that has had several shareholder changes, a share buyback, an EMI option scheme and two changes of accountant, none of them fully documented, can take a few months, because each gap has to be reconstructed and sometimes formally ratified. This is the single highest-leverage part of the whole timetable and the part most owners skip. Our guide to vendor due diligence and preparing your business for sale sets out what to gather and in what order.
2. Marketing and finding a buyer
This is the stage with the widest variation and the least legal content. What drives it is how many credible buyers exist for your business and whether your price expectation sits inside the range they will fund. A business in a sector with active trade consolidators or a known buyer already circling can move from decision to offer in weeks. A niche business dependent on one owner’s relationships, in a sector with no natural acquirer, can sit on the market for a year or more without a single fundable offer.
Two things lengthen this stage in ways that are within your control: a valuation set by what you need rather than what the business earns, and the absence of a credible second-line management team, which narrows your buyer pool to those prepared to run the business themselves. If your buyer pool is genuinely thin, a sale to the existing management team or to an employee ownership trust may be faster than finding a trade buyer, and both are structures we act on regularly.
3. Heads of terms
Heads of terms should be quick, and when they are not, it is usually because the parties are using them to avoid a difficult conversation rather than to have it. What drives the time is how much detail the parties are willing to pin down: price mechanism, what happens to the owner’s property if the business occupies a building they own personally, how any deferred element is calculated and secured, and the length of any exclusivity period.
A week or two spent properly on heads of terms for a business sale reliably saves more than that later, because every point left vague at this stage reappears as a negotiation in the share purchase agreement, when there is more pressure and less goodwill. Heads of terms are generally not intended to be legally binding on the commercial terms, but the exclusivity, confidentiality and costs provisions usually are, so the document does need to be read properly rather than signed as a formality.
4. Buyer due diligence
What drives this stage is almost entirely the quality of the seller’s answers, not the length of the buyer’s questionnaire. A well-prepared seller returns a complete response in one pass and the follow-up questions are narrow. An unprepared seller triggers a cycle of partial answers, chasing emails and new questions arising from the gaps, and each cycle costs a week or more of calendar time regardless of how fast anyone works.
Specific items we see cause delay repeatedly: missing or unsigned contracts with key customers, a lease the seller cannot locate, no written assignment of copyright in software or designs built by contractors, personal guarantees nobody remembers giving, and dividend history that the company’s own accounts do not support. Our guide to legal due diligence when buying a business covers what a buyer’s team is looking for and why.
5. Documentation and negotiation
Drafting a share purchase agreement or asset purchase agreement is not what takes the time. What takes the time is the risk allocation it records: the scope of the warranties, the caps and time limits on the seller’s liability, what goes into the disclosure letter, the tax covenant, and the restrictive covenants the seller will accept. These are commercial negotiations conducted through lawyers, and their length is set by how far apart the parties are on risk, not by typing speed.
Two structural choices reliably extend this stage. The first is a deferred or earn-out element, which requires the parties to agree in advance how performance will be measured, who controls the business while it is being measured, and what happens if the buyer changes the business in a way that affects the result. The second is a completion accounts price mechanism rather than a locked box, which moves part of the price negotiation to after completion and adds a further round of accountant-led argument. Neither is wrong, but both cost time and should be chosen deliberately.
Whether the deal is structured as a share sale or an asset sale also matters to the timetable, and not in the direction most people expect. We come back to that below.
6. Conditions and third party consents
This is where business sales actually slip, and it is the stage least often given its own line in a timetable. What drives it is other organisations’ internal processes, over which neither party has any influence and for which, in most cases, no deadline exists at all. We deal with each of the common ones in the next section, because they deserve more than a bullet point.
7. Completion
Completion itself is a single day and, done properly, a quiet one. Documents are signed or released from escrow, funds move, the stock transfer form is dated, board minutes are passed and the registers are written up. What makes completion late is almost never completion: it is a condition that was not satisfied, funds that did not clear in time, or a signature nobody chased.
One practical point worth planning for. On a share sale, the buyer cannot be entered in the register of members as a matter of settled practice until the stock transfer form has been stamped, and stamping requires the duty to have been paid. That does not hold up completion, but it does mean the paperwork trail runs on for weeks afterwards, and it is a reason not to schedule a completion for the day before a key filing deadline.
8. Post-completion
Post-completion is where most of the genuinely fixed deadlines sit. Stamp duty on a share sale must reach HMRC, with the stock transfer documents, no later than 30 days after the form has been dated and signed. Where an asset sale includes land or a lease, an SDLT return must be filed and the tax paid within 14 days of the effective date of the transaction. Changes to directors and to people with significant control must be notified to Companies House within 14 days, and a share allotment within a month. A confirmation statement can be filed up to 14 days after the end of the review period.
None of this is difficult, but all of it is dated, and penalties for late stamping and late filings are avoidable costs that sour an otherwise clean deal. Allow two to six weeks of someone’s attention after completion rather than treating the day funds move as the end.
The real bottlenecks, and why the legal phase is rarely one of them
If a sale we are acting on is going to be late, it will usually be late for one of the five reasons below. None of them is solved by pushing the solicitors harder, and all of them can be started earlier than they usually are.
Landlord consent to assign or to change control
If the business trades from leased premises, an asset sale will almost certainly need the landlord’s consent to assign the lease, and many leases also require consent or at least notification on a change of control of the tenant company. Section 1 of the Landlord and Tenant Act 1988 helps, but only to a point. Where consent is not to be unreasonably withheld, the landlord owes the tenant a duty, “within a reasonable time”, to give consent except where it is reasonable not to, and to serve written notice of the decision specifying any conditions or the reasons for refusal. The burden of showing that consent was given within a reasonable time falls on the landlord.
What the Act does not do is define a reasonable time, and in practice the clock does not start until a complete written application has been served. Institutional landlords and managing agents will typically want references, accounts for the proposed assignee, an undertaking for their costs and often an authorised guarantee agreement. Assembling that package is the part sellers control; waiting for the landlord’s surveyor and solicitor to work through it is the part nobody controls. Our advice is to open the conversation with the landlord before heads of terms are signed, not after, and to get the commercial property and corporate workstreams running in parallel.
Regulator approval of a new owner
In regulated sectors the regulator, not the parties, decides when the deal can complete, and in several of them registration is personal to the provider and cannot simply be handed over.
Under section 10 of the Health and Social Care Act 2008, any person who carries on a regulated activity without being registered commits an offence. That is why an asset sale of a care home, a dental practice or another CQC-regulated service cannot complete until the buyer holds its own registration for the activity at that location. The buyer applies as a new provider rather than inheriting the seller’s registration, and the application involves a fit and proper person assessment of the nominated individual and registered manager. CQC publishes its own guidance on how long it takes to assess applications, and that guidance changes, so check its current position at the time of your sale rather than relying on a figure quoted in an article. Plan on months rather than weeks, and build the condition into the timetable accordingly.
For pharmacies, the General Pharmaceutical Council requires notification of a change of ownership within 28 days of the change, and states plainly that if the notification form is not received in that window the pharmacy will be removed from the register, with a restoration application and fee needed to get it back. The form is to be submitted only after the change is complete, and the new owner has to show how it will meet the standards for registered pharmacies from the first day it opens. Separately, continuity of NHS dispensing income depends on the NHS pharmaceutical list arrangements, which run on their own track and their own timetable.
For GP practices, a GMS contract is not an asset you sell. The regulations treat a change in the contractor as a partnership change, not an assignment: where a partnership is to be dissolved and the contract is to continue with the remaining partners, written notice is required and the change cannot take effect until at least 28 days after that notice is given, and an individual practitioner intending to practise in partnership must give 28 days’ notice naming the proposed partners. Dental practices carry both a CQC registration point and, where there is NHS work, a separate contract question with the commissioner. Veterinary practices have their own premises registration and practice standards position with the RCVS.
The common thread is that none of these processes can be accelerated by the deal team, and all of them can be started as soon as a buyer is identified rather than once the share purchase agreement is agreed.
Lender consent and funding
Two lenders can hold a deal up. The seller’s existing lender needs to release its security and provide a redemption figure, which on a debenture with an unlimited intercompany guarantee can take longer to untangle than anyone expects. The buyer’s lender, meanwhile, will run its own credit process, its own valuation and often its own legal review, and will frequently impose conditions that feed back into the share purchase agreement. Where the buyer is using asset-based or acquisition finance, the lender’s timetable effectively becomes the deal’s timetable, and a buyer who has not got a credit-approved offer before heads of terms are signed is not yet in a position to commit to a completion date.
Change of control consents in the contracts you already have
Change of control clauses are easy to overlook because they sit in contracts the business signed years ago and has not read since. Customer framework agreements, supplier agreements, franchise and distribution agreements, software and data licences, equipment leases, grant funding agreements and insurance policies all commonly contain them, and the consequences range from a notification obligation to an immediate right to terminate.
Buyers will find these in diligence. If a material customer has a termination right, the buyer will want that customer’s consent as a condition of completion, and you are then waiting on a procurement team with no interest in your timetable. Reviewing your own commercial contracts for change of control provisions before you go to market tells you which conversations you will need to have and lets you have them on your own schedule. It is worth noting that this risk cuts the other way too: a share sale leaves contracts in place but may trigger change of control clauses, while an asset sale needs each contract novated or assigned and so needs consent far more often.
Incomplete company records
This is the one that most reliably surprises owners, because the business is trading perfectly well and the problem is invisible until a buyer’s solicitor looks for it. Missing stock transfer forms for historic share transfers, unstamped transfers, options granted without board approval, a register of members that was never written up, a shareholders’ agreement nobody can find, directors who resigned years ago and are still on the register.
Each of these has to be put right before a buyer will accept title to the shares, and some require historic stamping, ratifying resolutions or statutory declarations. Fixing a title chain mid-deal is slow and uncomfortable. Fixing it before you market the business is routine. If you are not sure whether your shareholders’ agreement and statutory registers reflect what the shareholders actually believe, that is the first thing to check.
Employees: the timing rules that do bind
On a share sale, the employing company does not change, so TUPE is not triggered and there is no transfer-related consultation obligation, though a buyer will still want the employment position properly documented. On an asset sale of a business or part of a business, TUPE almost always applies, and two statutory periods become relevant to the timetable.
First, under regulation 11 of the Transfer of Undertakings (Protection of Employment) Regulations 2006, the seller must give the buyer employee liability information “not less than 28 days before the relevant transfer or, if special circumstances make this not reasonably practicable, as soon as reasonably practicable thereafter”. That is a hard date counted back from completion, and it means the employee data has to be assembled well before the parties are ready to sign.
Second, if either party proposes redundancies in connection with the transfer at a scale that triggers collective consultation, section 188 of the Trade Union and Labour Relations (Consolidation) Act 1992 requires consultation to begin at least 45 days before the first dismissal takes effect where 100 or more dismissals are proposed, and at least 30 days in any other case. These periods were not changed by the Employment Rights Act 2025, although that Act does replace the fixed 20-employee threshold with a “threshold number” to be set by regulations, which may not be lower than 20. If restructuring is part of the buyer’s plan, those consultation periods have to be designed into the timetable rather than discovered at the end of it. Our guide to TUPE when buying or selling a business deals with the mechanics, and our employment team advises both buyers and sellers on how to sequence it.
Does a share sale or an asset sale complete faster?
In our experience a share sale is usually the faster route for an established trading company, which is the opposite of what the structure’s apparent complexity suggests. The reason is consents. On a share sale the company keeps its own contracts, leases, licences, employees and registrations, so unless a change of control clause or a regulatory rule says otherwise, nothing needs to be transferred and nobody’s permission is needed. The documentation is heavier, because the buyer inherits the company’s history and will want warranties and a tax covenant to match, but the heavy work is between the two sets of solicitors and is therefore controllable.
An asset sale has lighter documentation on its face but transfers each asset individually. Every lease needs the landlord’s consent, every material contract needs assignment or novation, employees transfer under TUPE with its 28-day information obligation, and in a regulated sector the buyer needs its own registration before it can trade. Any one of those can be the long pole. This is also why sellers of regulated businesses often find a share sale is the only structure that gets a deal done inside a sensible timeframe, and it is one of the reasons the structure question deserves proper thought at heads of terms stage rather than being treated as a tax point alone. You can read the full comparison in our article on share sale versus asset sale.
The statutory deadlines, with their sources
These are the fixed points. Everything else in this article is judgement or experience.
| Deadline | What it applies to | Source |
|---|---|---|
| 30 days from the stock transfer form being dated and signed | Paying stamp duty and getting the stock transfer documents to HMRC on a share sale. If the deadline falls on a weekend or bank holiday, payment must reach HMRC by the end of the preceding working day. | HMRC, Pay Stamp Duty on shares |
| 14 days from the effective date | Filing the SDLT return and paying the tax where an asset sale includes land or a lease in England or Northern Ireland. Wales and Scotland have their own taxes and their own time limits. | HMRC, Stamp Duty Land Tax online and paper returns |
| 14 days | Notifying Companies House of changes to directors or to people with significant control, and of a change to where the company keeps its records. | GOV.UK, Running a limited company: company changes you must report |
| Within one month | Notifying Companies House of an allotment of new shares. | GOV.UK, Running a limited company: company changes you must report |
| Up to 14 days after the review period ends | Filing the confirmation statement. | GOV.UK, Filing your company’s confirmation statement |
| Not less than 28 days before the transfer | The seller providing employee liability information to the buyer on a TUPE transfer, unless special circumstances make that not reasonably practicable. | TUPE 2006, regulation 11(6) |
| At least 45 days (100 or more dismissals) or 30 days (any other case) before the first dismissal takes effect | Beginning collective redundancy consultation with appropriate representatives. | Trade Union and Labour Relations (Consolidation) Act 1992, section 188(1A) |
| Up to 30 working days | The initial review period once a mandatory notification under the National Security and Investment Act 2021 is accepted. Completing a notifiable acquisition without clearance makes it void. | GOV.UK, NSI Act guidance on acquisitions |
| Within 28 days of the change | Notifying the GPhC of a change of pharmacy ownership. Late notification results in removal from the register. | General Pharmaceutical Council, Change of ownership |
| At least 28 days’ notice | Certain changes to a GMS contractor partnership, including continuing the contract with remaining partners on dissolution, and an individual practitioner moving to partnership. | NHS (General Medical Services Contracts) Regulations 2015, Schedule 3, Part 8 |
| A reasonable time, not defined | A landlord giving or refusing consent to assign and serving written notice of the decision with conditions or reasons, where consent is not to be unreasonably withheld. | Landlord and Tenant Act 1988, section 1(3) and 1(6) |
What actually shortens a business sale
Nothing on this list is glamorous, and all of it works.
- Get the statutory books, share history, contracts and leases in order before you go to market, not after an offer. This is the biggest single lever you have.
- Identify every consent the deal will need at the outset, write them down with the name of the person who has to say yes, and start the longest one first.
- Open the landlord conversation early. A complete written application, with accounts and references for the proposed assignee, is the thing that starts the landlord’s clock.
- In a regulated sector, begin the buyer’s registration or notification process as soon as the buyer is identified, and build it into the conditions rather than hoping it lands in time.
- Ask the buyer for evidence of credit-approved funding before signing exclusivity. An unfunded buyer with an exclusivity period is the most expensive kind of delay.
- Spend the extra week on heads of terms. Every vague point there becomes a negotiation later.
- Choose the price mechanism deliberately. A locked box completes cleanly; completion accounts and earn-outs extend the engagement, sometimes for years.
- Keep trading well. Nothing kills a timetable faster than a buyer renegotiating because the numbers moved during diligence.
Tax treatment is a separate question from timing, but it is worth getting advice on both at the same time, because the structure that completes fastest is not always the one that is most efficient. Business Asset Disposal Relief and the reliefs available on a sale to an employee ownership trust both have conditions that need to be satisfied before completion, not afterwards, and your accountant or tax adviser should confirm your own position on rates and eligibility as at the date you sell.
What this means for you
If you want a date, the honest answer is that you can only commit to one once you know which consents your deal needs and who is responsible for giving them. Until then, any completion date is a guess, and the published averages you will find elsewhere are not a substitute for working out your own critical path. The practical move is to spend the next few weeks making your business ready rather than worrying about the legal phase, because the legal phase is the part that behaves predictably.
We act for both buyers and sellers of owner-managed businesses, which means we can tell you honestly where the other side’s timetable is likely to be the constraint rather than yours. If you are thinking about selling, our broader legal guide to selling a business in the UK covers the whole process, and our selling a business and buying a business pages explain how we work on each side.
If you would like to map out a realistic timetable for your own sale, including which consents will sit on the critical path, speak to our corporate team. Call us on +44 207 566 1188 or email info@gurvelegal.com and we will give you a straight assessment of what your deal is likely to take and what you can start now.
This article sets out the general legal position as at 6 October 2026 and is not advice on any particular transaction. Tax points should be confirmed with your accountant or tax adviser.
