The True Cost of Due Diligence: What investors underestimate when entering African financial services

What does it actually cost when due diligence gets it wrong?

The true cost of due diligence is not the professional or advisory fees. It is not even the additional months of specialist review. It is the cost of what happens when the process fails to look beyond the historical accounting, to model what the business will actually look like under the acquirer’s own reporting framework, in the currencies that matter, with a realistic assessment of integration costs and timelines, subject to the regulatory changes that are already in train, and dependent on the management team and governance structures that will need to deliver against the investment thesis.

In African financial services, that cost has been measured in billions of dollars of destroyed shareholder value over the past two decades. This matters now more than ever. Research by leading global consulting firms consistently finds that over 60% of executives cite poor due diligence as the primary reason for deal failure , and that over 40% of pre-merger diligence fails  to provide an adequate roadmap for value creation.

The SRS Acquiom 2026 survey confirms that nearly three-quarters of senior dealmakers expect the process to get harder, not easier, over the next two years . This is because rising interest rates, tighter financing conditions, and greater scrutiny on valuations have reduced the availability of cheap capital and increased the cost of debt.

At the same time, macroeconomic uncertainty has widened the gap between buyer and seller expectations, making it harder to agree on pricing. More complex due diligence requirements, including regulatory, ESG, and operational risks, have also lengthened transaction timelines and increased execution risk. For African financial services specifically, these challenges are magnified by currency volatility, regulatory fragmentation and integration complexity.

Africa’s financial services sector remains one of the world’s most compelling investment opportunities, but the gap between the opportunity and the outcome has been, for too many investors, a very expensive education.

The Deal Record

Leading academic and industry research consistently places M&A failure rates at 70–90%, with some studies finding over 80% of mergers unsuccessful in creating shareholder value1. Those are global averages. In African financial services, the conditions that drive failure are concentrated.

The pattern repeats with uncomfortable regularity. International groups have paid significant premiums for landmark African platforms, only to watch goodwill erode as macroeconomic shocks, asset quality deterioration, and integration complexity overwhelmed the original investment case. Proposed exits from underperforming subsidiaries have collapsed, trapping investors in positions they could neither improve nor leave.

And here is the part that should give every prospective investor pause: this pattern is not confined to those who paid a premium, some of the continent’s most experienced groups have acquired distressed institutions at prices generating day-one bargain purchase gains under IFRS 3—and still found that the cumulative cost of multi-country integration ate through the apparent value. Profit margins compressed. Share prices lagged domestic benchmarks. Integration milestones slipped by years.

In every instance, reputable advisers ran the numbers.

The Accounting Blind Spot

Most financial due diligence on targets does exactly what it is designed to do: it audits the historical numbers. The problem is that the historical numbers are often a poor guide to what the business will look like once it sits inside the acquirer’s reporting framework.

• IFRS 3 fair value adjustments: Acquired assets and liabilities must be restated at fair value on day one. Loan portfolios, property, and intangibles frequently require material write-downs that the pre-deal model did not anticipate. And where the accounting produces a bargain purchase gain, that is a point-in-time number — not a guarantee of economic value. The real economics only emerge over the following years.
• Goodwill impairment: Premiums paid over net asset fair value sit on the balance sheet as goodwill and must be tested annually for impairment. When the assumptions behind the acquisition price prove optimistic, as they frequently have, the impairment charges hit earnings for years. Research suggests roughly a third of goodwill represents overpayment globally. In markets with acute information asymmetry, the proportion is almost certainly higher.
• Currency translation: A target that looks attractively priced in naira, kwacha, or shillings can deliver negative returns once depreciation flows through the consolidation. In 2024 alone, the Nigerian naira lost over 50% of its value against the dollar , wiping out returns for foreign investors who had not hedged or modelled FX into base cases.  FX translation losses have been a recurring feature of virtually every cross-border African banking deal of the past decade. They belong in the base case, not in a sensitivity appendix.

The fix is conceptually simple but rarely executed: model the post-acquisition balance sheet under the acquirer’s own accounting policies from day one, with independent asset valuation and specifically IFRS 9 models, stress-tested fair values, goodwill downside scenarios, and FX built into the base case.

The Forecasting Trap

The second blind spot sits in the financial model itself. Due diligence projections typically take historical performance, add synergies, subtract a token integration cost, and declare the deal accretive. The synergies may well be real. But the cost of realising them is almost always underestimated — sometimes dramatically.

• Integration costs: Technology migration, system harmonisation, rebranding, regulatory re-licensing, branch consolidation — routinely under costed at deal approval. The African deal record includes separation and integration bills running into the hundreds of millions.
• Cultural and organisational integration: Aligning corporate cultures, management practices, and local operating norms is often overlooked. Misalignment can lead to talent attrition, lower productivity, and delayed or unrealised synergies.
• Timelines: Models assume synergies in 12 to 18 months. Multi-jurisdiction African financial services integration takes three to five years, sometimes longer. Acquirers have described integration as “in progress” years after formal completion.
• Revenue synergies: Cross-selling assumptions are particularly fragile in markets where customer relationships are personal. When key people leave post-acquisition, and they often do, the distribution channel that underpinned the revenue case walks out with them.
• Holding company overheads: The cost of running a multi-country group including regional management, group compliance, consolidated reporting, and treasury, is routinely excluded from individual deal economics. These structural costs compound the challenge of realising value from acquisitions, particularly given that integration expenses alone can range from 70% to 160% of expected run-rate synergies, averaging roughly 120%, according to research by McKinsey & Company.

Better practice means bottom-up integration cost estimates benchmarked against comparable transactions, realistic synergy timelines, appropriately evaluate potential revenue synergies, and adequately account for holding company overheads.

The Other Risks That Get Discounted

Three further areas are consistently underweighted in African financial services due diligence:

Currency risk is the silent value destroyer. Some African markets have seen official and parallel exchange rates diverge by as much as 70%. Dividend repatriation depends on regulatory approval and FX availability, both of which can be unpredictable. Currency belongs in the base case model, not in a footnote.

Governance and human capital are decisive. Local regulatory relationships, market knowledge, and customer trust reside with individuals, not institutions. When they leave, and post-acquisition departures are common, the acquirer may be left running a business it does not fully understand in markets where relationships matter more than systems. Even experienced serial acquirers have found that absorbing multiple institutions across many countries simultaneously stretches management bandwidth beyond its limits.

Tax and AML compliance carry material, and often underestimated, consequences. Transfer pricing regulations across the continent are tightening. In 2024, Kenya, Nigeria, and South Africa all introduced enhanced transfer pricing enforcement mechanisms . Correspondent banking relationships are increasingly contingent on AML quality.

Finally, it is evident that the cost of tax opinions and audit fees have increased dramatically since pre-Covid due to a combination of demand and the relative risk premium for more complex and multi-jurisdictional transactions. 

The Bottom Line

The cost of better due diligence is measurable. The cost of inadequate due diligence has been measured, in billions.

Africa’s financial services markets remain among the world’s most attractive long-term opportunities but realizing that opportunity demands a due diligence approach built for the realities of transacting across the continent, not a developed market framework with an emerging-market overlay. It requires advisers who can model post-acquisition economics under the acquirer’s own IFRS reporting framework, stress-test loan books against fully calibrated ECL models, build FX exposure into the base case, and pressure-test integration costs and timelines against the actual experience of comparable transactions in these markets.

Critically, it requires advisers who can identify the real risks from the outset and have operated inside these markets, not just analysed them remotely. The risks that destroy value in African financial services transactions, the regulatory fragmentation, the governance dependencies, the currency dynamics and the integration complexity, are not risks that can be adequately assessed from a desk. They require on-the-ground knowledge, direct relationships with regulators and market participants, and the kind of judgment that only comes from having executed transactions across the continent’s diverse and demanding markets.

This is the space in which Africa Merchant Capital Advisory operates. As a specialist corporate finance advisory firm with a dedicated focus on Sub-Saharan Africa’s private markets, AMCA brings together multi-disciplinary expertise in M&A advisory, due diligence, and cross-border transaction execution with the deep market knowledge that comes from building a practice on the ground. Our team combines corporate finance, merchant banking, private equity, and our own investment experience with direct, first-hand understanding of the regulatory, operational, and commercial realities across the continent’s financial services landscape. Through our membership of CDI Global, we bring this local expertise to a network spanning more than 30 countries, connecting African opportunities with global capital and ensuring that the due diligence process is grounded in the market dynamics that determine whether a transaction creates or destroys value.

The investors who will succeed in African financial services are those who invest as much rigour in understanding the market as they do in modelling the deal.

About CDI

CDI Global’s international reach provides distinctive advantages for multinational clients. CDI Global has successfully partnered with and collaborated with clients around the world, in vertical sectors that span virtually every major industry.  Our executive team works collaboratively to meet your strategic goals and our success is built on the long-term relationships we develop, providing broader insight and opportunities for our clients. We are committed to conducting all of our business activities with confidentiality, respect and integrity.

By: Milko Škoro, Managing Director of AMC Advisory