Closing Business Deals UK: M&A Legal Steps Guide

Overview

Closing a business transaction is the final phase of an M&A process, where ownership of shares or assets legally passes from seller to buyer. In practical terms, it's the point at which months of negotiation, investigation and drafting come together into a completed deal.

The process isn't one single event. It's a sequence of overlapping workstreams that typically include investigating the target business, negotiating and signing the main transaction documents, obtaining any approvals needed from regulators, and then executing the closing itself. The exact steps depend heavily on whether the deal is structured as a share purchase or an asset purchase, the size of the businesses involved, the sectors they operate in, and whether any cross-border elements are in play.

A small owner-managed business changing hands looks very different from a regulated financial services acquisition. The underlying legal logic, though, stays broadly the same: identify the risks, document the terms clearly, satisfy any legal prerequisites, and transfer the asset or shares in line with the agreement.

Key steps

1. Carry out due diligence. The buyer (and sometimes the seller) investigates the target business in detail. This covers financial accounts, material contracts, employment arrangements, intellectual property, property interests, litigation history, tax position, and regulatory compliance. The aim is to flag anything that might affect value or create risk. Specialist input from accountants, tax advisers or environmental consultants is often needed alongside legal review.
2. Negotiate and sign the main transaction documents. The core document is usually a share purchase agreement or asset purchase agreement. It sets out price, payment structure, conditions to completion, warranties, indemnities, restrictive covenants and any earn-out mechanics. Ancillary documents such as disclosure letters, tax deeds, service agreements and transitional services arrangements typically sit alongside it, and each needs careful attention.
3. Obtain regulatory and third-party consents. Depending on the size and sector of the deal, clearance may be needed from the Competition and Markets Authority, the Financial Conduct Authority, or sector-specific regulators. The National Security and Investment Act regime may also apply where the target operates in sensitive sectors. Third-party consents under key contracts, property leases or lending arrangements often have to be chased down in parallel.
4. Satisfy conditions precedent. Many deals are signed on one day and completed on a later date, with closing conditional on specified events. These might include regulatory clearance, shareholder approval, release of security over assets, or delivery of particular documents. Both sides typically work through a conditions checklist and communicate regularly about progress before a completion date is locked in.
5. Complete the transaction. On completion, signed documents are exchanged or released from escrow, funds are transferred, share certificates or asset transfers are executed, and statutory books and filings are updated. For share deals this means updating the register of members and filing confirmation statements at Companies House where relevant. For asset deals it can involve multiple separate transfers covering property, contracts, employees under TUPE, and intellectual property.

Common questions