Very few e-commerce acquisitions are paid entirely in cash at completion — most deals involve some combination of upfront cash, deferred payments and an earn-out tied to future performance, and understanding how these structures work is essential before you accept, or reject, an offer based on headline valuation alone.
Why headline valuation rarely tells the whole story
Two offers with an identical headline enterprise value can differ enormously in what a seller actually receives, and when, depending on how much of the consideration is paid upfront in cash versus deferred or contingent on future performance. Sellers who focus purely on the headline number without scrutinising the structure behind it frequently find themselves disappointed with actual realised proceeds, particularly when an earn-out target isn't met.
How earn-outs typically work
An earn-out defers a portion of the purchase price, paying it out over an agreed future period (commonly one to three years) contingent on the business hitting specified financial targets, most often revenue or EBITDA thresholds. Buyers favour earn-outs because they bridge a valuation gap when the buyer is less confident in projected future performance than the seller, and because they retain founder incentive and involvement through a transition period that's often critical to the business retaining its value.
- Revenue-based earn-outs are more predictable but can incentivise unprofitable revenue growth if not carefully structured.
- EBITDA or profit-based earn-outs align more closely with genuine value creation but are more easily influenced by buyer decisions post-completion.
- Milestone-based earn-outs (a product launch, a specific customer contract) suit businesses with a clear near-term value driver.
- Most earn-outs are capped, with a defined maximum additional payment regardless of how far targets are exceeded.
The control problem at the heart of every earn-out
The single most important issue to negotiate in any earn-out is control — once the buyer owns the business, they typically control decisions about marketing spend, product range, pricing and staffing that directly affect whether earn-out targets are achieved, yet the seller bears the financial consequence of underperformance. Well-drafted earn-out clauses include specific operating covenants (a minimum marketing budget, restrictions on merging the business into a wider group, a requirement to maintain the acquired brand's product range) that protect the seller's ability to actually hit the agreed targets.
Deferred consideration versus true earn-outs
Deferred consideration — a fixed, unconditional payment due at a future date, typically used to manage the buyer's cash flow or to hold back a portion against warranty claims — is a materially lower-risk structure for a seller than a true earn-out, because it does not depend on future performance. Sellers with genuine leverage in a negotiation should generally prefer deferred consideration to a performance-contingent earn-out wherever the buyer's stated rationale is cash flow management rather than a genuine valuation gap.
Vendor loan notes and other UK-specific structures
UK deals sometimes use vendor loan notes, where part of the consideration is structured as a loan from seller to buyer, repayable over an agreed schedule, which can offer certain tax timing advantages and align interests similarly to deferred consideration. Share-for-share exchanges, more common in larger strategic acquisitions or where the buyer is itself a growing platform business, allow a seller to retain upside in the combined entity but introduce liquidity and valuation risk in the buyer's own shares that should be scrutinised as carefully as cash terms.
Negotiating the structure, not just the price
Approach a heads of terms negotiation with as much scrutiny applied to deal structure — the cash-to-deferred ratio, earn-out targets and protections, escrow terms, and warranty and indemnity caps — as to the headline valuation figure itself. Engaging experienced M&A legal advice before signing heads of terms, rather than only at the sale and purchase agreement stage, gives you meaningfully more leverage to shape these terms while competitive tension in the process still favours the seller.
Related Considerations for UK Retailers
None of the decisions above happen in a vacuum, and it's worth thinking about how understanding earn-Outs and deal structures in an e-Commerce sale fits alongside the other choices you're making as a UK online retailer. Our companion guide, Understanding Product Liability Insurance for UK E-Commerce Sellers, goes into this in more depth.
It's also worth getting comfortable with how buyers in your specific category actually value businesses, since multiples and preferred deal structures vary meaningfully between, say, a subscription-driven consumer brand and an Amazon-dependent private label seller. Generic valuation rules of thumb are a reasonable starting point, but category-specific benchmarks — from a broker, aggregator or accountant who works in your space — will usually be more accurate.
Due diligence, whenever it happens, has a habit of surfacing exactly the issues that were quietly deferred earlier — inconsistent bookkeeping, undocumented verbal agreements, unresolved compliance gaps. Addressing these proactively as part of Business Valuation & Metrics, rather than scrambling once a buyer's accountants start asking questions, both speeds up a future process and protects the price you're ultimately offered.
For related reading: For a closer look at this, see our guide to Exit Planning and Valuing an E-Commerce Business: Preparing for a Future Sale, Even If It's Years Away. For a closer look at this, see our guide to Understanding UK VAT, Import Duties and E-Commerce Tax Obligations.