Customer Due Diligence Before the Deal Closes and What Private Equity Firms Often Get Wrong in Singapore
The customer retention risk that spreadsheets cannot see
A private equity firm asked us to run customer diligence on a Singapore-based B2B services company they were acquiring. The target had impressive numbers on paper. Revenue had grown 22% year-over-year for three consecutive years. Customer concentration looked manageable, with the top five clients representing about 35% of revenue. Net revenue retention was reported at 108%. The deal team was comfortable.
We conducted in-depth interviews with 18 of the target's customers. What we found changed the deal structure. Seven of the 18 customers (and I should note this was a purposive sample, not random, so the proportion should be read cautiously) told us they were in active conversations with competitors. Three had already signed letters of intent with alternative providers. The "loyal" customer base that justified the acquisition multiple was, in reality, a customer base in the early stages of quietly leaving.
The target company's own data showed none of this. Churn had not started appearing in the financials because most contracts had 12-18 month terms. By the time the revenue impact showed up in the P&L, it would be 6-12 months post-close. The PE firm would have paid a premium for a business that was, to put it directly, already shrinking.
This is the problem with customer due diligence that relies exclusively on financial data. Financial metrics are lagging indicators. By the time dissatisfaction shows up as churn, the damage is done.
Why financial models miss what customers are actually thinking
I want to be careful here because I am not suggesting financial due diligence is unimportant (that would be absurd). What I am saying is that financial due diligence answers the question "what has happened?" and customer research answers the question "what is about to happen?" Both questions matter. Most PE firms only ask the first one.
The Monetary Authority of Singapore requires financial institutions to conduct due diligence on transactions, but the regulatory framework naturally focuses on financial and legal risk. Customer sentiment risk, the risk that the customer base you are buying is less loyal than the data suggests, sits outside the standard DD framework. It is not a regulatory gap exactly. It is an assumption gap. Deal teams assume that historical revenue patterns predict future revenue patterns, and in stable markets that assumption is often reasonable. In Singapore's competitive B2B services environment, it is frequently wrong.
Data from the Accounting and Corporate Regulatory Authority shows that Singapore processes thousands of M&A transactions annually. The question is how many of those transactions include meaningful customer-level diligence beyond reference calls that the target company arranges. In our experience (and I acknowledge this is observation, not data), the answer is surprisingly few.
In one financial services acquisition we researched, the target's NPS score was 72. Our IDIs revealed that 40% of those "promoters" had already begun evaluating alternatives. The NPS measured sentiment at a point in time. It did not measure intent, which is what actually determines future revenue.
The reference call problem in Singapore
Most PE firms do conduct some form of customer diligence. They ask the target for a list of reference customers and then call those customers. This approach has an obvious selection bias problem everywhere, but it is particularly unreliable in Singapore for a cultural reason that is worth explaining.
In Singapore's business culture, being asked to serve as a reference creates a social obligation. The customer has been chosen specifically, which implies trust and relationship. Criticising the company during a reference call feels like a betrayal of that relationship, particularly if the customer knows their name will be attached to their feedback. So reference calls in Singapore produce overwhelmingly positive results regardless of the customer's actual satisfaction level. The feedback is genuine in the sense that the person believes what they are saying in that moment, but it is filtered through social norms that suppress negativity.
This connects to patterns we have documented in our banking consumer research and more broadly in our work on how stated intentions diverge from actual behavior across categories. The mechanism is similar. Singaporeans are not being dishonest. They are navigating a communication culture where directness, particularly negative directness in a relationship context, feels inappropriate.
Independent customer research, where the interviewer is a neutral third party and confidentiality is guaranteed, produces dramatically different results. Customers who gave glowing references through the target's arranged calls told us, in private IDIs, that service quality had been declining, that their account manager had been replaced twice in the past year, and that they were (to use their words) "keeping options open."
What IDIs with customers actually reveal that due diligence reports miss
Over the past several years, we have conducted customer diligence programmes for PE firms, family offices, and corporate acquirers across multiple sectors. The findings cluster around four categories of risk that financial due diligence consistently misses. I am going to describe each one, with the caveat that these are patterns rather than universal rules.
CUSTOMER DUE DILIGENCE IDI FRAMEWORK
Concentration risk that looks different from the inside
Financial due diligence will flag customer concentration. If one customer represents 30% of revenue, that goes in the risk section of the investment memo. But concentration risk as seen from the customer's perspective is different from concentration risk as calculated from the target's financials. A customer who represents 15% of revenue might not seem concerning from a concentration standpoint, but if that customer tells you (in a confidential interview) that they chose this provider because the previous account manager was exceptional, and that account manager left six months ago, the retention risk on that 15% is much higher than the concentration analysis would suggest.
We have seen this repeatedly in financial services research. The relationship between a B2B customer and their service provider in Singapore is often dependent on a specific person rather than the company's platform or brand. When that person leaves, the relationship becomes fragile in ways that contractual terms do not capture. Our insurance trust research found similar dynamics in consumer contexts, where trust attaches to the advisor rather than the institution.
Service quality trends that churn data arrives too late to capture
The second pattern is service quality deterioration that has not turned into churn. In several diligence programmes, customers told us that service quality had declined noticeably over the past 6-12 months. When we investigated, the cause was usually the same. The target company, knowing it was preparing for a sale, had been optimising margins by reducing headcount or replacing experienced staff with junior employees. The financials looked better for the sale process, but the customer experience was degrading.
This is a problem that only customer research can detect because the financial impact is delayed. Singapore's economic data shows that services sectors are growing, which means customers have increasing alternatives. A deteriorating service experience in a growing market is a retention time bomb.
Competitive vulnerability the target will not disclose
Target companies have no incentive to tell acquirers about competitive threats during a sale process. Customers, in confidential interviews, will tell you exactly which competitors are approaching them, what the competing offers look like, and how seriously they are considering switching. In one technology services deal we researched, customers told us about a new market entrant (a well-funded regional player that had not appeared in any of the competitive analysis the target provided) that was offering comparable services at 30% lower pricing. Three of the target's top ten customers had received proposals from this competitor. None of this appeared in the sell-side materials.
Understanding competitive dynamics from the customer's perspective is different from the traditional market mapping that appears in most investment research. Market maps show who the competitors are. Customer interviews reveal who the competitors are that matter, which is not always the same thing.
Willingness to pay that is lower than contract terms suggest
The fourth pattern relates to pricing power. Contract terms show what customers are currently paying. IDIs reveal what customers think they should be paying and what they would pay if alternatives were available. In markets where the target has benefited from limited competition (which is common in Singapore's smaller, specialised B2B segments), customers may be paying prices they consider unfair, and they will switch to a fair-priced alternative as soon as one appears. This is pricing risk that contract analysis cannot detect.
For PE firms planning post-acquisition price increases as part of their value creation thesis, this finding is particularly relevant. If customers already feel overcharged, price increases will accelerate churn rather than improve margins. This connects to broader pricing sensitivity patterns we see in well-scoped research programmes across sectors.
How to structure customer diligence that actually protects the deal
Based on our experience running these programmes (and I want to be transparent that our experience is concentrated in Singapore and the region, not globally), here is what works.
Recruit independently, not through the target
This is the single most important methodological decision. If the target selects which customers you speak to, you will get a curated sample. We work from the target's customer list (which the deal team can access through the data room) and recruit directly, explaining that we are an independent research firm conducting market research. We do not mention the acquisition. This approach produces materially more honest feedback than target-arranged reference calls. Enterprise Singapore's market research frameworks support the value of independent research in commercial decision-making.
Use indirect probes for switching intent
Asking "are you planning to leave this provider?" is about as effective as asking someone if they are planning to cheat on their partner. The answer will almost always be no, even when it is yes. Instead, we probe indirectly. "If a new provider entered the market offering similar services, how would you evaluate them?" and "what would need to change about your current arrangement for you to consider alternatives?" produce far more revealing answers. These are techniques we have refined through years of cultural moderation work in Singapore.
Quantify the risk in terms the deal team can use
Research findings need to translate into financial impact to influence deal terms. We map each interviewed customer's retention risk (low, medium, high) against their revenue contribution and then model scenarios. What happens to the target's revenue if all high-risk customers churn within 24 months? What about a more conservative scenario where half of them leave? These scenarios give the deal team something they can work with in valuation discussions and earnout structuring.
The research design process for customer diligence needs to be fast (deal timelines are compressed) but methodologically sound. We typically complete a 15-20 customer IDI programme in three to four weeks, which fits within most DD timelines.
What PE firms should consider about customer due diligence in Singapore
How many customer interviews are needed for meaningful due diligence
How long does customer due diligence research take
Will customers know that their provider is being acquired
What happens if customer diligence reveals significant retention risk
Can customer due diligence be done for consumer businesses as well as B2B
Customer due diligence through independent IDIs is not a replacement for financial DD. It is a complement that answers questions financial analysis cannot. In Singapore's relationship-driven business culture, where dissatisfied customers maintain politeness until the day they leave, the gap between what the data shows and what customers are actually thinking is wider than most deal teams assume. The PE firms that are getting this right are the ones that treat customer research as a standard part of the diligence process, not an optional extra when time permits.
Finding out what the target's customers actually think before you close
Reference calls arranged by the target produce polished feedback. Independent customer IDIs reveal the retention risks, competitive threats, and service quality trends that determine whether your acquisition thesis holds. We design and run customer diligence programmes that fit within deal timelines.
Request a quote →
