Completion is not the end. After you sell your business, you must manage handover, tax, earn-outs, employment obligations, lease transfers, data, accounts closure and the personal transition that follows. This guide explains what to expect.
Quick Answer
Once a business sale completes, the buyer takes legal ownership and the proceeds transfer to you. But completion is not the end of the process — it is the beginning of a new phase that comes with its own obligations, deadlines and practical demands.
In the weeks and months after a sale, you will typically need to manage capital gains tax and any Business Asset Disposal Relief claim, fulfil a handover period, meet any earn-out conditions, complete the TUPE transfer of staff, ensure the lease has been properly assigned, hand over all digital accounts and data, close or wind down the business entity if it is no longer needed, and comply with any non-compete or non-solicitation restrictions in the sale agreement.
On a personal level, many sellers are surprised by how different life feels after completion. The adjustment to not running a business — even one you were ready to leave — is something worth planning for in advance.
Contents
What happens on completion day
Completion is the legal moment at which ownership of the business passes from the seller to the buyer. For a share sale, this is the moment the share transfer is executed and the buyer becomes the registered shareholder. For an asset sale, it is the moment the asset transfer documentation is exchanged and the agreed consideration is paid.
On completion day, the buyer's solicitor transfers the agreed funds — net of any retention or escrow amount — to the seller's solicitor's client account. Once receipt is confirmed, the seller's solicitor releases the signed completion documents: the sale agreement, transfer forms, directors' resignations where applicable, and any other completion deliverables that have been held in escrow pending funds.
Physical access to the business then transfers: keys, door codes, alarm codes, physical cash in the till, vehicles, and any other assets that have a physical presence. Digital access — system logins, website admin, social media credentials — transfers as agreed in the completion documentation. The handover of access credentials should not happen before funds are confirmed in the seller's solicitor's account.
From that moment, the buyer is in control. The seller no longer has authority to act on behalf of the business, sign documents in its name, or make commitments that bind it. If the seller has agreed to remain involved during a handover period, that involvement is defined by the terms of the post-completion arrangements, not by ownership.
Proceeds and payment
The sale proceeds will typically arrive first in your solicitor's client account, and are remitted to you after accounting for the solicitor's fees, any agreed retentions or escrow amounts, and any adjustments agreed in the completion accounts.
Completion accounts — a set of accounts prepared as at the completion date — are common in business sales. They allow the consideration to be adjusted to reflect the actual working capital, net assets or other financial metrics of the business at the precise moment of sale, rather than at the date of the original valuation. If the completion accounts show that the business was worth more or less than assumed in the agreed price, the consideration is adjusted accordingly. This process typically takes a few weeks after completion and can result in a further payment from buyer to seller or vice versa.
Any retention or escrow amount held back at completion — typically to secure the seller's warranty obligations for a defined period — will be released when the retention period expires, subject to any warranty claims made by the buyer in the meantime.
If the sale was structured as an asset sale, the proceeds are received by the business entity rather than directly by the individual seller. The seller must then consider how to extract those proceeds from the company — as salary, dividend, or through a formal dissolution — and the tax implications of each route are different. This is a time-sensitive decision that should be made with accountant input promptly after completion.
Tax after selling your business
Tax is one of the most important considerations in the weeks following completion, and prompt action is essential. The relevant timescales for HMRC notifications and Self Assessment filings are fixed, and missing them creates unnecessary complications.
For a sale by an individual — of a sole trader business, a partnership interest, or shares in a company — the gain is subject to Capital Gains Tax. The gain is calculated as the sale proceeds minus the base cost (typically the original price paid or the value at acquisition), minus allowable expenses of sale. If the annual CGT exempt amount has not been used elsewhere in the same tax year, it reduces the taxable gain.
Business Asset Disposal Relief (BADR, formerly Entrepreneurs' Relief) is a relief that reduces the CGT rate on qualifying gains to a lower rate than standard CGT. As of disposals on or after 6 April 2026, the rate under BADR is 18%. For disposals between 6 April 2025 and 5 April 2026 it was 14%, and for disposals before 6 April 2025 it was 10%. Eligibility requires that the seller has owned the business or shares for at least two years immediately before the disposal, and that various other qualifying conditions are met. The lifetime limit on gains eligible for BADR has changed in recent years — the current limit should be confirmed with a tax adviser and checked against current GOV.UK guidance.
For sales structured as asset sales from a company, the gain arises at the company level, subject to Corporation Tax. The seller then faces the additional question of how to extract the proceeds from the company, with further tax considerations attached.
Earn-out consideration — deferred payments contingent on future performance — creates additional complexity. Depending on how the earn-out is structured, HMRC may seek to tax it as employment income rather than as a capital gain, particularly where the seller remains employed in the business during the earn-out period. This is a significant issue that should be addressed in the sale agreement and reviewed with a tax adviser.
Do not delay engaging a tax adviser after completion. Post-sale tax planning can be time-sensitive, and the choices available — including elections, claims for relief, and decisions about proceeds extraction — may close if not acted on promptly.
Earn-outs and deferred consideration
If the sale price includes an earn-out element — consideration paid after completion, contingent on the business meeting defined financial targets — the transaction is not fully settled at completion. The earn-out period may extend for one, two or three years, during which the seller's entitlement to the deferred consideration depends on the business's performance.
Common earn-out structures include a percentage of annual revenue over a defined period, EBITDA targets, customer retention thresholds, gross profit floors, or milestones tied to specific contract renewals or new business wins. The exact mechanism, measurement approach, and payment schedule should all be set out in detail in the sale agreement.
During the earn-out period, the seller may be required to remain involved in the business in some capacity — to help achieve the targets, to provide continuity, or to give the buyer reasonable confidence that the earn-out metrics are not being artificially suppressed. The seller's role, remuneration, and rights during the earn-out period should be clearly defined in the documentation.
Earn-outs carry the risk of dispute. If the buyer manages the business in a way that reduces performance below what the earn-out targets assume — whether through changed strategy, withdrawal of resources, or accounting adjustments — the seller's deferred consideration may be lower than expected. The sale agreement should contain earn-out protections: obligations on the buyer to operate the business in a way that gives the earn-out a fair chance, restrictions on accounting changes that might depress the metrics, and a defined dispute resolution mechanism if the parties cannot agree on the earn-out calculation.
After completion, keep detailed records of everything relevant to the earn-out. If a dispute arises, documentation of the business's actual performance, the decisions that affected it, and the parties' communications during the earn-out period will be central to resolving it.
Handover period
Most business sales include a defined handover period during which the seller remains available to support the transition. This is not a courtesy — it is typically a contractual obligation set out in the sale agreement, and it may have been a meaningful part of the buyer's reason for proceeding with the deal.
The length and nature of the handover varies considerably. For a small, simple business with an experienced buyer, two to four weeks may be sufficient. For a complex business with significant customer relationships, staff dependencies, or specialist technical knowledge concentrated in the owner, three to six months of meaningful involvement may be needed. Where the seller is also subject to an earn-out, the involvement may be longer still.
During the handover, the seller should introduce the buyer to key customers, suppliers and contacts — not just by email, but in person where relationships warrant it. Staff who are used to working with the seller need to understand that the buyer has their full authority and confidence. Processes that were held in the seller's head need to be documented. Institutional knowledge — the reasoning behind pricing decisions, the history of key relationships, the quirks of specific accounts — needs to be shared in a usable form.
The handover should be taken seriously as a professional obligation. A buyer who has paid a significant sum for a business depends on the seller to make the transition work. A poor handover can damage customer relationships, destabilise staff, trigger operational problems, and — where an earn-out is involved — directly affect the seller's financial return.
Staff and TUPE after the sale
Where the business employed staff, the Transfer of Undertakings (Protection of Employment) Regulations 2006 (TUPE) will normally have applied, transferring employees to the buyer automatically on their existing terms and conditions.
After completion, the seller should confirm with the buyer that all affected employees have transferred correctly and that payroll has moved to the buyer's payroll system. P45s or the relevant payroll documentation should be provided. Pension obligations must have been communicated to transferring employees, and contributions should transfer to the buyer's pension arrangements.
The seller must not have dismissed any employees because of the transfer — that is automatically unfair dismissal. If any employees chose not to transfer, or if there were legitimate redundancy processes agreed as part of the sale negotiation, these must have been handled correctly before or at completion with proper employment advice.
Where any employees remained with the seller — for example, in a partial sale where only some staff transferred — the position of those staff under the relevant agreements and under TUPE should be clearly established. If the seller intends to retain staff under a different structure, or has agreed to make employees redundant rather than transfer them, the employment law implications must be addressed with advice.
Lease, premises and utilities
The formal assignment of any commercial lease to the buyer should be confirmed in writing after completion. This typically involves a licence to assign executed by both the seller, the buyer, and the landlord, formally recording that the lease has transferred and releasing — or not releasing — the seller from ongoing obligations.
Sellers sometimes assume that the lease automatically ceases to be their concern once the business has sold. This is not always the case. Many commercial leases include an Authorised Guarantee Agreement (AGA), under which the outgoing tenant guarantees the incoming tenant's performance of the lease obligations for the duration of the lease or until the next assignment. If you signed an AGA as part of the assignment, you remain contingently liable for the lease until those conditions expire. Understanding exactly what you have guaranteed, and for how long, is important.
If a personal guarantee on the lease was given before the sale, check whether it was released as part of the completion. Landlords are not always willing to release personal guarantees on assignment, and the seller may remain exposed unless the guarantee is expressly terminated.
All utilities, business rates and insurance must transfer to the buyer. Final meter readings should be taken and notified to suppliers. Any direct debits from the seller's accounts for business premises must be cancelled once confirmed that transfer has taken place. If the business operated from premises that are no longer needed after completion, a formal notice of end of occupation should be given.
Data, systems and digital accounts
The transfer of data, digital access and systems is a practical obligation that many sellers underestimate, and one with legal dimensions under UK data protection law.
Every system and account associated with the business should be formally handed over. This includes the website and domain name — which should be transferred to the buyer's registrar or hosting account, not simply have the password shared. Email accounts, customer-facing communications, CRM systems, accounting software, EPOS systems, booking platforms, social media accounts, cloud storage, and any proprietary software licences all need to be formally transferred.
The ICO's guidance on data sharing during mergers and acquisitions is clear that personal data transferred as part of a business sale must be handled lawfully, purposefully, and with appropriate documentation. Customer data, staff data, supplier contact information and any other personal data that transfers to the buyer must be transferred on a lawful basis and in accordance with the terms agreed in the data protection provisions of the sale agreement.
Once transfer is complete, the seller must not retain personal data they are no longer entitled to hold. Customer databases, employee records and any other personal data that has moved to the buyer should be deleted from the seller's systems in accordance with the agreed data deletion plan. This is a legal obligation, not an optional courtesy.
Closing your business accounts
In a share sale, the company continues — it is now owned by the buyer, who is responsible for its ongoing operation and filings. The seller has no further company responsibilities unless they remain as a director during a handover period.
In an asset sale, the selling company remains with the seller after completion, but it may no longer be trading. The seller must notify HMRC of the cessation of trading and file a final Corporation Tax return for the period up to cessation. If the company is VAT-registered, a VAT deregistration application must be submitted unless the TOGC treatment means a new registration is needed — in which case the VAT number may transfer. Final payroll runs must be completed and payroll HMRC obligations closed. Director's loan accounts, if any, must be resolved before the company is dissolved.
Companies House dissolution can only proceed once all remaining obligations are addressed. A company cannot simply be abandoned. The formal dissolution process, known as striking off, requires an application and confirmation that the company has no outstanding liabilities. An accountant should manage this process.
Bank accounts associated with the business should be closed once all transactions related to the sale have cleared — including completion account adjustments, VAT reclaims, final payroll runs, and any payments due to or from HMRC.
Non-compete and restrictions
The sale agreement will almost certainly contain restrictive covenants that limit what the seller can do after completion. These restrictions are legally binding and, where drafted properly, are enforceable by injunction and claim for damages.
A non-compete clause prevents the seller from operating a business that competes with the sold business within a defined geographic area for a defined period. The scope and duration of non-competes are subject to reasonableness — a court will not enforce a restriction that is unreasonably wide — but a properly drafted restriction of one to three years covering the business's operating territory is typically enforceable.
A non-solicitation of customers clause prevents the seller from approaching former customers of the business during the restriction period. This is particularly important where the seller's personal relationships with customers are the primary reason those customers might follow them to a new venture.
A non-solicitation of staff clause prevents the seller from recruiting former employees during the restriction period. This protects the buyer from the seller deliberately draining the team they just acquired.
A confidentiality restriction prevents the seller from using or disclosing confidential business information — customer lists, pricing data, operational processes — after the sale.
Before taking any steps to start a new business, take a new role, approach former customers or recruit former staff, read your restrictions carefully and take legal advice on whether what you intend to do would breach them. The consequences of a breach — injunctions that can stop the activity immediately and financial claims for damages — are serious.
Life after selling your business
Selling a business is a significant life event, and the personal adjustment that follows is something that many sellers are not fully prepared for.
The relief of completing is real — the process is demanding, and most sellers feel genuine satisfaction when it is over. But the relief often fades faster than expected, replaced by a sense of disorientation about what comes next. Running a business, even a stressful one, provides structure, purpose, identity and social connection. When those things disappear simultaneously at completion, the gap can be surprising.
Common experiences in the months after selling include: an initial period of rest and satisfaction, followed by a growing sense of purposelessness; difficulty adjusting to not being needed, not making decisions, and not being the person responsible for something; uncertainty about identity outside of the business — particularly for sellers who have run their business for many years; and practical questions about how to manage time, finances and relationships that were previously structured around the business.
Sellers who have planned what comes next — whether that is a retirement with specific activities and interests, a new venture they have already thought through, family time they have consciously prioritised, or a role that uses their expertise in a different way — tend to adjust more positively than those who expected the relief of selling to be sufficient on its own.
If restrictions prevent you from returning to your sector for a defined period, factoring that into your planning for the post-sale period is important. The period of a non-compete is not dead time — it is time that can be used for learning, travel, projects outside the restricted scope, or building the foundations of what comes next.
A financial adviser can help you think through how the proceeds are invested, what income you will need, and how to structure the transition from earned income to investment or other income streams. This planning is not just about money — it is about sustainability of lifestyle and purpose over the longer term.
Post-sale checklist
Proceeds received and completion statement reviewed carefully.
Tax adviser engaged for post-sale CGT planning, BADR claim and income structuring.
Earn-out terms reviewed in full and tracking process established.
Handover plan committed to and introductions begun.
Staff TUPE transfer confirmed and payroll handed over to buyer.
Pension obligations communicated and transfers confirmed.
Lease assignment confirmed in writing — licence to assign executed.
Personal guarantee position on the lease confirmed — release obtained if negotiated.
Utility, rates and insurance accounts transferred or closed.
All digital accounts and systems transferred to buyer.
Personal data deleted or transferred in accordance with GDPR obligations.
Business entity wound down or dissolution process started, with accountant support.
Non-compete, non-solicitation and confidentiality restrictions read and understood.
Personal plans for the period ahead prepared.
FAQs
When do I receive the sale proceeds?
The main consideration is normally transferred on completion day, once your solicitor has confirmed funds are received and completion documents are exchanged. Any retention, escrow amount, or deferred consideration is paid later according to the terms of the sale agreement. Completion account adjustments, where applicable, are typically settled within a few weeks of completion.
Do I have to pay tax immediately after selling my business?
Not on the day, but you must notify HMRC and include the gain on your Self Assessment tax return for the tax year in which the disposal occurred. The payment deadline for CGT is typically 31 January following the end of the tax year, though for residential property gains a 60-day reporting and payment requirement applies. For business sales, speak to a tax adviser promptly after completion to understand your specific obligations and timescales.
What is Business Asset Disposal Relief and how do I claim it?
Business Asset Disposal Relief (BADR) is a UK Capital Gains Tax relief that applies a reduced rate to qualifying gains from selling a business. As of 6 April 2026, the BADR rate is 18%. To qualify, you must have owned the business or shares for at least two years immediately before disposal, and other qualifying conditions must be met. BADR is claimed via your Self Assessment return. A tax adviser can confirm eligibility and make the claim correctly.
Can I start a new business after selling?
Yes, but you must first check your non-compete and non-solicitation restrictions carefully. If your agreement prohibits competing in the same sector or territory for a defined period, starting a competing business before the restriction expires could expose you to an injunction and financial claim from the buyer. Take legal advice before acting.
Do I have to stay on after completion?
Only if your sale agreement includes a requirement for a handover period, employment arrangement, or consultancy role. If the agreement requires you to remain available for a defined period or to fulfil earn-out conditions, those obligations are binding. If no post-completion involvement was agreed, you are not obliged to remain beyond what was contractually committed.
What happens if the buyer disputes the earn-out?
If the earn-out calculation is disputed, the resolution mechanism set out in the sale agreement applies. This typically involves one or both parties appointing an independent expert — usually an accountant — to determine the correct calculation, with the expert's decision being binding on both parties. If the dispute is about something other than the calculation (such as the buyer's management of the business during the earn-out period), the matter may require solicitor involvement and, if not resolved, litigation.
What happens to my pension after I sell?
Pension arrangements are personal to you and do not transfer with the business. If the business contributed to your pension as an employee, those contributions stop at the point you leave. Your existing pension pot remains yours. Speak to a financial adviser about how to manage your pension in the context of your post-sale income and financial plans.
Key takeaways
Completion marks the beginning of a post-sale phase that carries its own obligations and demands. Tax planning must begin promptly — capital gains tax, Business Asset Disposal Relief eligibility, and proceeds extraction all require timely action with professional advice. Earn-outs, if applicable, may extend the seller's involvement and financial interest in the business for months or years. The handover period is a contractual and professional obligation, not an optional courtesy. Staff, lease, data and accounts all need careful management after completion. Non-compete and non-solicitation restrictions are legally binding and must be read and respected. And the personal transition after selling a business is something worth planning for in advance — completion is a significant life event, and what comes next deserves as much thought as the sale itself.
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, employment adviser, property adviser 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, property, data protection, brokerage, corporate finance, M&A or regulated advice.
Buying, selling, financing, structuring or transferring a business can have legal, tax, employment, property, data protection and commercial consequences. You should seek independent professional advice before making an offer, listing a business, signing documents, forming a company, taking over a lease, sharing sensitive data or completing a business purchase.
Sources and useful references
GOV.UK: Get information about a company
GOV.UK: Selling your business — your responsibilities
GOV.UK: Running a limited company — directors' responsibilities
GOV.UK: Corporation Tax trading and non-trading
GOV.UK: Renting a business property — tenant responsibilities
GOV.UK: Business transfers, takeovers and TUPE
GOV.UK: Business Asset Disposal Relief
GOV.UK/HMRC: VAT registration threshold changes
ICO: Due diligence when sharing data following mergers and acquisitions