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Financial due diligence: the scrutiny the most regulated sector demands

The due diligence of a financial institution is the most complex in the Spanish market. To the standard legal and tax review are added the regulatory review — licences, sanction history, supervisory requirements, capital and liquidity ratios — and the analysis of the asset portfolio (loans, investments, derivatives) and contingent liabilities (litigation over distributed products, provisions for legal risks). A buyer that does not carry out rigorous due diligence may acquire a financial institution with pending regulatory requirements, hidden litigation over products distributed to retail clients, or asset portfolios with a credit quality different from that shown in the balance sheet.

Since 2010 · 16 years Tax agent AEAT

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Why BM Consulting

Specialised advice and personal service

At BMC we carry out due diligences on financial institutions for buyers acquiring banks, insurers, fund managers, or financial asset portfolios: full legal and regulatory review, analysis of pending and contingent litigation, tax review, and support in managing the regulatory approval process before the Bank of Spain, the CNMV, the DGS, or the ECB.

  • Acquiring a significant participation (≥10%) in a Spanish credit institution requires prior Bank of Spain (or ECB) authorisation — the process takes 3-6 months and must be initiated immediately after signing, making regulatory approval the critical path item in closing timelines.

  • Contingent liabilities from financial product litigation (floor rate clauses, IRPH, preference shares, swaps) are the most difficult due diligence chapter in Spanish bank acquisitions — existing provisions must be stress-tested against current Supreme Court case law standards.

  • The ALCO review is essential in any bank due diligence

    interest rate gap risk, deposit concentration, and investment portfolio liquidity can embed material risks not visible in published accounts — this was a recurring finding in 2022-2024 acquisitions.

  • In insurer due diligence, IBNR (incurred but not reported) provision adequacy and change-of-control portfolio lapse risk are the two contingencies that most frequently require purchase price adjustment or escrow mechanisms.

How we work

From first contact to case completion

  1. Regulatory due diligence

    We review the entity's licences and authorisations, its history of sanctions and incidents with supervisors, pending regulatory requirements, the position regarding capital and liquidity ratios, and the internal governance mechanisms required by regulation.

  2. Legal due diligence: contracts, litigation, and transactions

    We review the entity's material contracts (deposit, credit, securities, insurance, investment services), pending client litigation, the position of claims proceedings before the client ombudsman and the FOS, and agreements with critical third-party providers.

  3. Portfolio review and contingent liabilities

    We analyse the credit portfolio quality (non-performing loans, provisions, collateral), the securities and derivatives portfolio, and quantify the contingent liabilities arising from litigation over distributed products (preference shares, interest rate swaps, investment funds).

  4. Regulatory approval support

    We prepare the documentation for the prior authorisation request to the regulator (Bank of Spain, CNMV, DGS, or ECB depending on the entity), coordinate with the target entity's advisers, and manage the communication process with the supervisor during the review period.

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The problem

The due diligence of a financial institution is the most complex in the Spanish market. To the standard legal and tax review are added the regulatory review — licences, sanction history, supervisory requirements, capital and liquidity ratios — and the analysis of the asset portfolio (loans, investments, derivatives) and contingent liabilities (litigation over distributed products, provisions for legal risks). A buyer that does not carry out rigorous due diligence may acquire a financial institution with pending regulatory requirements, hidden litigation over products distributed to retail clients, or asset portfolios with a credit quality different from that shown in the balance sheet.

Our solution

At BMC we carry out due diligences on financial institutions for buyers acquiring banks, insurers, fund managers, or financial asset portfolios: full legal and regulatory review, analysis of pending and contingent litigation, tax review, and support in managing the regulatory approval process before the Bank of Spain, the CNMV, the DGS, or the ECB.

Process

How we do it

1

Regulatory due diligence

We review the entity's licences and authorisations, its history of sanctions and incidents with supervisors, pending regulatory requirements, the position regarding capital and liquidity ratios, and the internal governance mechanisms required by regulation.

2

Legal due diligence: contracts, litigation, and transactions

We review the entity's material contracts (deposit, credit, securities, insurance, investment services), pending client litigation, the position of claims proceedings before the client ombudsman and the FOS, and agreements with critical third-party providers.

3

Portfolio review and contingent liabilities

We analyse the credit portfolio quality (non-performing loans, provisions, collateral), the securities and derivatives portfolio, and quantify the contingent liabilities arising from litigation over distributed products (preference shares, interest rate swaps, investment funds).

4

Regulatory approval support

We prepare the documentation for the prior authorisation request to the regulator (Bank of Spain, CNMV, DGS, or ECB depending on the entity), coordinate with the target entity's advisers, and manage the communication process with the supervisor during the review period.

Financial due diligence: the most demanding in the Spanish market

The acquisition of a financial institution is the most complex M&A transaction in the Spanish market, and the due diligence that precedes it reflects that complexity. To the standard due diligence reviews — legal, tax, employment — sector-specific layers are added: the regulatory review of licences and compliance, analysis of capital and liquidity ratios, review of asset portfolio quality, and quantification of contingent liabilities arising from litigation over distributed financial products.

At BMC we carry out financial institution due diligences with the specialisation the sector requires. We know the banking, insurance, and securities regulatory framework, the criteria of the Bank of Spain, the CNMV, and the DGS in their supervisory processes, and the case law on the most frequent sector disputes.

Regulatory due diligence: the heart of the review

The licence and regulatory position of a financial institution are its most critical assets: without them, it cannot operate. We verify that licences are current and unconditional, that there are no ongoing sanction proceedings, that supervisory requirements are being met, and that capital and liquidity ratios comply with the regulatory minimums. Institutions with pending capital requirements or with significant sanction histories may be higher-risk acquisitions than the balance sheet suggests.

Contingent liabilities from litigation: the most difficult chapter

Litigation arising from the distribution of financial products to retail clients is one of the most difficult contingencies to quantify in a Spanish bank’s due diligence. Claims over floor rate clauses, IRPH, preference shares, swaps, and other products whose terms the Supreme Court has declared unfair extend over years and generate uncertainty that balance sheet provisions may not cover fully.

We analyse the status of pending litigation, the current case law on the most frequent types of claim, and estimate the probable contingent liability in different scenarios.

Regulatory approval process: managing it from the outset

Regulatory approval in a financial institution acquisition is not a formality: it is a process that can take months, requires extensive documentation about the buyer, and can condition or delay the closing of the transaction. We manage the process from the first informal interactions with the regulator through to the formal submission of the application and follow-up during the review period.

Tax due diligence on financial institutions: the specialist dimension

The tax due diligence of a financial institution adds specific layers that are not present in other sector acquisitions. Open tax periods under Article 66 of the General Tax Act (LGT) extend to the standard four years, but this extends to ten years where the institution has carry-forward losses or applied deductions — a material risk in financial groups that experienced losses during the 2008-2014 financial crisis and accumulated significant deferred tax assets (DTAs).

The acquirer must assess whether the target’s DTA position is recoverable. Spanish credit institutions have special DTA arrangements under which certain deferred tax assets are convertible into direct tax credits against future tax liabilities under Real Decreto-Ley 14/2013 and Law 27/2014, but the conversion triggers are subject to regulatory capital treatment requirements. DTAs that are not protected by this mechanism may not be recoverable if the business plan post-acquisition changes significantly.

Transfer pricing within the financial group — intra-group loans, management service fees, shared services, technology licences — must be reviewed for compliance with Article 18 LIS documentation requirements. The AEAT’s Large Taxpayers Delegation scrutinises transfer pricing in financial groups intensively, and undocumented or poorly documented intercompany transactions represent a significant contingent liability in a tax due diligence.

VAT on financial services is the most litigated area of taxation in the sector. The acquirer must review the target’s VAT recovery pro-rata calculations for the open periods, assess whether any ancillary services have been incorrectly classified as VAT-exempt, and evaluate whether there is exposure from back-office outsourcing arrangements where the AEAT has sought to tax the service rather than treat it as part of the exempt financial service supply. CJEU case law on the exemption boundary is the key analytical framework here.

AML compliance: a mandatory due diligence chapter

Anti-money laundering compliance must be treated as a separate due diligence chapter in any financial institution acquisition. The AML/CFT obligations for Spanish credit institutions, payment institutions, and investment services firms are governed by Law 10/2010 on the Prevention of Money Laundering and Terrorist Financing and the Reglamento RD 304/2014.

The SEPBLAC (Servicio Ejecutivo de la Comisión de Prevención del Blanqueo de Capitales e Infracciones Monetarias) supervises AML compliance and has imposed increasingly significant sanctions — both fines and, in serious cases, licence conditions — for deficient AML programmes. Acquiring an institution with AML deficiencies means inheriting the regulatory relationship with SEPBLAC and potentially the in-progress sanction proceedings.

Key AML due diligence questions include: whether the institution’s customer due diligence (CDD) policies meet the risk-based approach requirements; whether enhanced due diligence (EDD) has been applied to Politically Exposed Persons (PEPs) and high-risk jurisdictions; whether the Suspicious Activity Reporting (SAR) programme is operational and the internal reporting chain documented; and whether any SAR filing decisions have been reviewed by the compliance function and signed off by the senior responsible officer.

For fund managers and investment services firms, additional MiFID II conduct requirements layer on top of the AML obligations. The due diligence must assess whether client categorisation, suitability assessment records, and product governance documentation meet current CNMV standards.

Credit portfolio review: quality of earnings and provisioning adequacy

For bank acquisitions, the credit portfolio review is the most time-intensive component of the due diligence. The objectives are to assess whether the Bank of Spain provisioning circulars have been correctly applied, whether non-performing loan (NPL) coverage ratios are adequate, and whether the collateral valuations supporting secured exposures are current and realistic.

The Spanish NPL framework is governed by Bank of Spain Circular 4/2017 (accounting standards for credit institutions), which establishes criteria for staging loans between Stage 1, Stage 2, and Stage 3 under IFRS 9, and for calculating expected credit loss provisions. Acquisitions of bank loan portfolios (rather than the entire institution) typically involve a price negotiation based on the actual versus expected loss calculations, which requires specialist credit assessment skills.

A buyer that relies solely on the target’s published provision levels without commissioning an independent portfolio review sample is taking material risk. Standard practice is to sample 70-80% of the portfolio by value, focusing on Stage 2 and Stage 3 loans, and to commission external property valuations on a subset of the real estate collateral. The findings feed directly into the purchase price adjustment mechanism in the SPA — a well-designed earnout or price adjustment clause is worth significantly more than the due diligence cost if provisioning deficiencies are found.

Derivatives and securities portfolio: mark-to-market and accounting risk

Financial institutions with significant derivatives portfolios introduce valuation complexity into the due diligence. OTC derivatives are carried at fair value on the balance sheet, and the valuation models used must be reviewed for reasonableness — particularly for illiquid or complex instruments where the model assumptions are material.

The credit valuation adjustment (CVA) and debit valuation adjustment (DVA) applied to OTC derivative portfolios can be significant and may have changed materially since the balance sheet date. An acquirer that does not review the CVA/DVA calculations as part of due diligence may find that the derivatives portfolio fair value is different from the published figures, with a direct impact on net asset value.

For securities portfolios classified at amortised cost (held-to-maturity or business model 2 under IFRS 9), the due diligence must assess whether any reclassification events have occurred that could trigger IFRS 9 penalties, and whether the duration risk embedded in the portfolio is consistent with the ALCO framework.

Insurer due diligence: technical provisions and reinsurance

Insurer acquisitions have a specific due diligence dimension that does not arise in other financial sector transactions: the adequacy of technical provisions. Technical provisions — premium reserves, claim reserves, and IBNR — are the most material item on an insurer’s balance sheet and their calculation involves actuarial assumptions that must be independently validated.

Under Solvency II (Directive 2009/138/EC, implemented in Spain by Law 20/2015 on Insurance Organisation), technical provisions must represent the best estimate of the insurer’s obligations plus a risk margin. Actuarial review of the best estimate — including the claims development factors, discount rates, and the tail assumptions for long-tail lines of business — is an essential part of insurer due diligence.

Reinsurance arrangements are the second major due diligence focus. Intra-group reinsurance (captive arrangements) must be reviewed for arm’s length pricing and transfer pricing compliance. External reinsurance must be reviewed for credit risk of the reinsurer and for the enforceability of the recoveries — including whether any excluded or disputed claims could reduce the recoveries below the balance sheet carrying value.

The change-of-control provisions in reinsurance treaties must be reviewed carefully: some treaties include notification and consent requirements that, if not met, could trigger early termination, leaving the acquired entity without its expected reinsurance protection post-closing.

FAQ

Frequently asked questions

The requirements depend on the type of entity: acquiring a significant participation (from 10% upwards) in a credit institution requires prior authorisation from the Bank of Spain (or the ECB for significant institutions); acquiring an investment services firm requires non-objection from the CNMV; and acquiring an insurer requires authorisation from the Directorate General of Insurance. In all cases, the process involves submitting information about the acquirer (solvency, reputation, business plan) and may take three to six months.
Quantifying contingent liabilities from litigation — over preference shares, floor rate clauses, IRPH, swaps distributed to retail clients — requires analysing the number of affected contracts, the probable success rate of claims based on current case law, the average amount per claim, and the procedural status of ongoing litigation. Financial institutions must provision for the most probable litigation, but the buyer must verify whether existing provisions are sufficient under current judicial standards.
A financial institution's data room should include: corporate and company law documentation, regulatory licences and authorisations, financial statements and annual reports for the last five years, internal and external audit reports, supervisory reports (inspection minutes, requirements), credit portfolio samples, material client and supplier contracts, documentation of principal litigation, regulatory compliance policy and compliance programme documentation (AML, MiFID), and documentation of capital instruments and wholesale financing transactions.
In an insurer, the most frequent contingencies are: insufficient technical provisions for claims in progress and IBNR (incurred but not reported), risks of reclassifying certain life insurance contracts as deposits (with accounting consequences), litigation over claims rejections, tax contingencies in the taxation of technical provisions and life insurance, and risks of client portfolio cancellation in the event of a change of control.
Regulatory approval timelines depend on the type of entity and the complexity of the acquirer's structure. For a significant participation in a credit institution supervised by the Bank of Spain, the standard process takes three to six months from the submission of a complete application. ECB-supervised significant institutions may take longer. For CNMV-supervised investment services firms, the non-objection process typically takes two to three months. Regulatory approval is a condition precedent to closing in virtually all financial institution acquisitions, so the process must be initiated as early as possible — typically immediately after signing the acquisition agreement.
The Asset and Liability Committee (ALCO) review analyses how the bank manages the interest rate and liquidity risks in its balance sheet: the repricing gaps between assets and liabilities, the sensitivity of the net interest margin to rate changes, the concentration of deposits by maturity and counterparty, and the composition and liquidity of the investment portfolio. In the 2022-2024 interest rate rising cycle, Spanish banks with large fixed-rate mortgage portfolios faced significant ALCO risk that was not always visible in published accounts. A buyer that does not review ALCO data as part of due diligence may acquire an institution with material interest rate risk embedded in the balance sheet.

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Frequently asked questions

Questions about Due Diligence for Financial Services Entities

The requirements depend on the type of entity: acquiring a significant participation (from 10% upwards) in a credit institution requires prior authorisation from the Bank of Spain (or the ECB for significant institutions); acquiring an investment services firm requires non-objection from the CNMV; and acquiring an insurer requires authorisation from the Directorate General of Insurance. In all cases, the process involves submitting information about the acquirer (solvency, reputation, business plan) and may take three to six months.
Quantifying contingent liabilities from litigation — over preference shares, floor rate clauses, IRPH, swaps distributed to retail clients — requires analysing the number of affected contracts, the probable success rate of claims based on current case law, the average amount per claim, and the procedural status of ongoing litigation. Financial institutions must provision for the most probable litigation, but the buyer must verify whether existing provisions are sufficient under current judicial standards.
A financial institution's data room should include: corporate and company law documentation, regulatory licences and authorisations, financial statements and annual reports for the last five years, internal and external audit reports, supervisory reports (inspection minutes, requirements), credit portfolio samples, material client and supplier contracts, documentation of principal litigation, regulatory compliance policy and compliance programme documentation (AML, MiFID), and documentation of capital instruments and wholesale financing transactions.
In an insurer, the most frequent contingencies are: insufficient technical provisions for claims in progress and IBNR (incurred but not reported), risks of reclassifying certain life insurance contracts as deposits (with accounting consequences), litigation over claims rejections, tax contingencies in the taxation of technical provisions and life insurance, and risks of client portfolio cancellation in the event of a change of control.
Regulatory approval timelines depend on the type of entity and the complexity of the acquirer's structure. For a significant participation in a credit institution supervised by the Bank of Spain, the standard process takes three to six months from the submission of a complete application. ECB-supervised significant institutions may take longer. For CNMV-supervised investment services firms, the non-objection process typically takes two to three months. Regulatory approval is a condition precedent to closing in virtually all financial institution acquisitions, so the process must be initiated as early as possible — typically immediately after signing the acquisition agreement.
The Asset and Liability Committee (ALCO) review analyses how the bank manages the interest rate and liquidity risks in its balance sheet: the repricing gaps between assets and liabilities, the sensitivity of the net interest margin to rate changes, the concentration of deposits by maturity and counterparty, and the composition and liquidity of the investment portfolio. In the 2022-2024 interest rate rising cycle, Spanish banks with large fixed-rate mortgage portfolios faced significant ALCO risk that was not always visible in published accounts. A buyer that does not review ALCO data as part of due diligence may acquire an institution with material interest rate risk embedded in the balance sheet.
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