Growth Through Acquisition: What Owners Should Watch in Small Deals

Why acquisitions are becoming interesting for small businesses

According to the succession monitor of KfW, Germany’s state-owned development bank, around 545,000 owners of German small and mid-sized companies want to hand over their business by the end of 2029, and 569,000 plan to close without a successor. For a growing business in the same or a neighboring industry, this creates an opportunity: instead of building customers, employees, and locations one by one, it takes over a business that already has all of this.

The opportunity is tempting, and that is exactly why it deserves sobriety. This analysis answers one question: Under what conditions does a small acquisition bring real growth, and what must an owner watch beforehand? To answer it, we first clarify the terms, present a mental model that explains typical mistakes, review what studies show about acquisitions among small and mid-sized firms, and finally derive checkpoints.

Terms: acquisition, purchase price, integration

• Acquisition: The purchase of a company or part of it. In a share deal, the buyer takes over the company with all rights and obligations; in an asset deal, only selected parts such as machines, customer contracts, or the brand.
• Synergy: The additional value created because two businesses achieve more together than separately, for example through joint purchasing, cross-selling to the new customers, or better capacity utilization.
• Purchase price and earnings value: The price is what is paid. The earnings value is what the business can be expected to generate in future profits. For small businesses, the price is often expressed as a multiple of adjusted profit.
• Integration: Everything that happens after the purchase so that two businesses become one or work together sensibly: processes, systems, leadership, culture, and customer communication.
• Pre-purchase review (due diligence): The thorough examination of the target company’s figures, contracts, customers, employees, and risks.

For vetting business partners, there is a simple tiered logic in the guide due diligence on business partners. An acquisition calls for the most thorough tier, and it goes far beyond public sources.

The mental model: the hubris hypothesis

In 1986, the financial economist Richard Roll put forward an uncomfortable thesis, the hubris hypothesis. It states that many acquisitions take place not because the buyer recognizes real added value, but because they overestimate their own ability to run the target company better. Those who badly want to buy inflate the synergies, play down the risks, and therefore pay too much.

Related to this is the winner’s curse, known from auctions: when several bidders compete for an object of uncertain value, the winner is typically the one who overestimated its value the most. Winning the bidding process is therefore a warning sign in itself. The logic transfers to small acquisitions, even if there is rarely a formal auction. Often a second interested party, or your own wish to finally make the leap, is enough.

1. Enthusiasm

   A suitable business is available. Customers, location, and services seem to complement yours perfectly.

2. Optimistic calculation

   Additional revenue and savings are estimated without justifying them individually.

3. Price above value

   The price paid assumes that all synergies materialize, and quickly.

4. Disillusionment

   Customers follow the seller, key staff leave, integration takes longer. The purchase price has been paid regardless.

What studies show about acquisitions of small companies

Most acquisition studies concern listed corporations and measure success by the share price. They say little about small businesses. One of the rare exceptions comes from Arvanitis and Stucki (2015). They analyzed all mergers and acquisitions registered in Switzerland between 2006 and 2008. After cleaning, 1,398 companies remained, of which 405 took part in a detailed survey. 60 percent of the firms involved had fewer than 100 employees. They were compared with a control group of companies without an acquisition.

The result is cautiously positive: for three of five indicators examined, acquirers showed significantly better development in 2008 to 2010 than comparable companies without an acquisition. For acquisitions of outside firms, growth was the main motive; for mergers within a group, efficiency. The authors explain why small companies might fare differently from corporations. In their favor, ownership and management are usually in the same hands, so the conflict of interest between managers and owners is smaller. Against them, they often lack resources to search for suitable targets, experience with acquisitions, and openness to a different business culture.

An earlier analysis of the same data by Arvanitis and Stucki (2014) reached a finding that is particularly important for owners: whether an acquisition succeeded depended mainly on features of the acquisition itself, not on market conditions, competition, or the size of the buyer. Bauer, King, Covin, and colleagues (2026) show, using small and mid-sized acquirers from the Nordic countries, German-speaking Europe, and China, that there are different paths to successful integration. Entrepreneurially oriented buyers gave the managers of the acquired business more decision-making freedom, while market-oriented buyers standardized processes more strongly.

The limits: the Swiss results are based on buyers’ self-assessments and a response rate of 29 percent. Companies with failed acquisitions may have responded less often. The findings therefore do not argue against acquisitions, but they do not guarantee success either.

Two readings: shortcut or detour?

Both readings describe real cases. The studies suggest that the difference lies less in the market than in the approach. I therefore do not consider the question “acquisition, yes or no?” decisive, but rather whether an owner examines the acquisition with the same discipline as a large investment in their own business. An acquisition is growth paid in advance: the price is due immediately, the benefit only after successful integration. What this means for liquidity is described in growth costs liquidity.

Whoever buys a business mainly buys the relationships of its people, and those are not in any purchase agreement.

The most important question: what remains when the seller leaves?

In small businesses, customer relationships are often personally tied to the owner. The essay succession and sales describes this from the seller’s perspective. For the buyer, it is the central question of value. A worked example with freely chosen numbers shows how strongly it affects the price: a business earns an adjusted profit of 150,000 euros a year, and the purchase price is four times that, or 600,000 euros. Because part of the costs is fixed, profit falls more sharply than revenue when customers leave.

At 30 percent customer loss, it takes almost seven years instead of four to earn back the price, without interest. That is why the review includes questions that are not in any balance sheet: which customers does only the owner know? Who are the contacts on the customer side, and how old are they? Are there written contracts or only habit? And which employees carry the knowledge without which the business does not work?

• Customer base ranked by revenue, with the share of the ten largest customers and contract status
• For the most important customers: who looks after them today, and who could do so in future?
• Key employees named, with age, notice periods, and willingness to stay
• Transition period agreed with the seller, during which they personally hand over customers
• Purchase price justified by today’s profit, not by hoped-for synergies
• Financing planned so that your own business remains liquid even if things go less well
• Review of contracts, liability, and taxes by professionals

How many customers a business can lose through the retirement of their owners, and why this also applies to buyers, is discussed in demographic change in the customer base. An acquired customer base can itself be aging.

After the purchase: the first hundred days

If features of the acquisition itself determine success, integration is part of it. For small acquisitions, a simple plan in place before signing is enough.

Whether more alignment or more freedom for the acquired business is right depends, according to Bauer, King, Covin, and colleagues (2026), on your own orientation. Both paths can work as long as they are chosen deliberately and pursued consistently. If you use an acquisition as a step into a new region, you will find additional checkpoints in the guide expanding into a new region.

Conclusion: when an acquisition brings growth

To the guiding question: a small acquisition brings real growth when the price is based on today’s profit, customers and key staff are highly likely to stay, and the buyer has planned the integration before signing. The Swiss data show that acquisitions among small and mid-sized firms can improve acquirers’ performance, and that success depends mainly on the approach. The hubris hypothesis is a reminder of where the greatest danger lies: with the buyer who wants to buy too badly.

1. Write down which goal an acquisition should serve and whether it could also be reached organically.
2. Set a price ceiling based on today’s profit before you examine a target.
3. For every target, assess customer loyalty and key staff first, then the figures.
4. Bring in tax advice, legal advice, and your bank early.

Whether growth through acquisition fits your strategy at all also depends on whether a business is meant to become merely larger or also more scalable. The difference is described in the guide scaling or just growing. A good acquisition is rarely the one you absolutely wanted, but the one where you were prepared to say no.