Horizontal Acquisition is the purchase of a company that competes in the same market and at the same stage of the value chain as the buyer, such as one EMI buying another or one payment acquirer buying a rival. The buyer gains market share, customers, licences or capacity it would otherwise build or win one by one. Unlike a vertical deal, which buys a supplier or channel, most value comes from cost synergies: merged compliance teams, safeguarding arrangements, audits and processor contracts. Customer overlap, shared dependence on one safeguarding bank and ledger migration reduce the gain. Licensed targets need change-of-control clearance, and large deals may also need competition approval where combined national market share is high.
Horizontal vs vertical acquisition
The distinction is about where the target sits relative to the buyer. In a vertical acquisition, a payment gateway buys the acquirer it routes transactions to, moving up or down the chain. In a horizontal deal, buyer and target sell broadly the same service to the same type of customer. A conglomerate acquisition involves an unrelated business. A sequence of small horizontal deals in a fragmented market is a roll-up.
Why companies make horizontal acquisitions
Most of the value comes from cost synergies. Two payment institutions doing the same work each run compliance teams, safeguarding arrangements, banking partners, audits and processor contracts. After a merger, one of each can often serve both, and combined volume earns lower processing and scheme-related pricing.
A worked example: an EMI with 60,000 business customers and €9 million of annual operating cost buys a competitor with 25,000 customers and €5 million of cost. If merging compliance, technology and banking relationships removes €1.8 million of combined cost, and the buyer pays 6 times that saving for the synergy component, the synergies alone justify €10.8 million of the price. Revenue synergies, such as cross-selling FX to the target's customers, are usually discounted more heavily because they depend on customer behaviour.
Licence coverage is the other driver. Buying a competitor already authorised in another jurisdiction can be faster than a new application, which is why horizontal deals between EMIs and payment institutions are common.
What can go wrong
Horizontal deals concentrate the same risks. If both firms rely on the same safeguarding bank, the combined firm is more exposed to that bank withdrawing service. Customer overlap reduces the real gain: if 30% of the target's merchants already use the buyer, revenue does not simply add up. Migrating customers between two different ledgers and onboarding stacks is where integration budgets usually overrun.
Regulatory approval
A change of control in a licensed financial firm needs supervisory clearance. For EU credit institutions, anyone reaching a qualifying holding of 10% of capital or voting rights must notify the supervisor, with further notifications at 20%, 30% and 50%; the ECB has 60 working days to assess, extendable to 90. Large horizontal deals can also need competition clearance where the combined share of a national market is high. Signing-to-completion timelines in mergers and acquisitions of licensed firms should be built around these reviews.