Banking Law and Informal Finance Cultures in Spain

1. Introduction

“Informal finance cultures” is not a separate statutory category in Spanish banking law. It is a useful socio-legal concept describing financing that occurs outside conventional bank lending channels, including family or community loans, private lending, non-bank professional lenders, rotating or relationship-based financing, merchant credit and some technology-enabled forms of alternative finance.

Informal does not automatically mean illegal. A genuine private loan between individuals can be lawful. However, once lending becomes professional, consumer-facing, intermediary-based or otherwise regulated, Spanish and EU rules concerning consumer credit, mortgage credit, transparency, usury, anti-money-laundering controls and taxation may become applicable.

Spain therefore has a mixed system:

formal bank finance + regulated non-bank finance + lawful private finance + prohibited or abusive financial practices.

The legal challenge is determining where a particular arrangement falls within that structure.

2. Meaning of Informal Finance Culture

An informal finance culture exists where people rely on personal, community or non-traditional financial relationships rather than ordinary institutional banking.

Examples can include:

• loans between relatives;
• financial assistance between friends;
• private individual-to-individual loans;
• informal business financing;
• credit supplied through commercial relationships;
• community-based financial arrangements;
• professional non-bank lending;
• online alternative-finance models.

The legal treatment varies considerably.

A one-time interest-free loan from a parent to an adult child is fundamentally different from a business systematically lending money to consumers.

Spanish banking law therefore focuses on the economic substance and professional character of the activity, not merely the label chosen by the parties.

3. Informal Lending Is Not Automatically Banking

A fundamental distinction must be made between taking deposits from the public and making a private loan from one's own funds.

Banking activities are heavily regulated because credit institutions perform functions affecting depositors and financial stability.

By contrast, an individual who occasionally lends personal money does not automatically become a bank.

However, professional lending can trigger other regulatory regimes even where the lender is not technically a credit institution.

This distinction is important because Spanish financial law regulates several categories of non-bank professional lenders and intermediaries.

4. Consumer Credit and Informal Finance

Where informal or alternative financing is supplied commercially to consumers, Law 16/2011 on consumer credit agreements can become highly important.

The legislation regulates qualifying credit agreements between businesses and consumers and contains requirements concerning:

• pre-contractual information;
• contractual documentation;
• annual percentage rates;
• responsible lending;
• creditworthiness assessment;
• consumer rights; and
• withdrawal and repayment in qualifying situations.

The legislation specifically requires lenders to assess the consumer's creditworthiness before concluding a covered credit agreement.

Thus, calling a product “alternative finance” does not by itself remove consumer-credit obligations.

5. Family and Friends Loans

Family finance represents perhaps the clearest form of informal finance.

Suppose a person lends €20,000 to a relative to help establish a business.

The arrangement can constitute a genuine private loan rather than a banking service.

Nevertheless, several legal issues remain important:

Proof of the transaction: Written documentation can establish whether the money was genuinely a loan rather than a gift.

Repayment terms: The parties can identify the amount, maturity and repayment arrangements.

Interest: The agreement should make clear whether interest applies.

Tax characterisation: A genuine loan and a gift have different legal and tax characteristics.

Evidence: Documentation can become important if a later dispute arises.

The essential principle is that informality in the relationship does not eliminate ordinary contract and tax law.

6. Professional Non-Bank Lending

The position becomes significantly different when lending is conducted professionally.

Spanish legislation recognises that financial activity can occur outside conventional credit institutions.

For example, Spain's anti-money-laundering legislation covers persons professionally engaged in intermediation in loans or credit and certain persons professionally carrying out specified lending activities without being conventional credit institutions.

Therefore:

non-bank does not necessarily mean non-regulated.

A professional lender may simultaneously encounter consumer-credit, mortgage-credit, AML, data-protection and general contractual requirements.

7. Law 2/2009 and Non-Bank Mortgage Lending

Another important component of Spain's framework has historically been Law 2/2009, dealing with contracting with consumers for mortgage loans or credits and services concerning loan contracts supplied by businesses other than credit institutions.

This demonstrates that Spanish law has long recognised a market existing between traditional banking and purely personal lending.

Such businesses cannot escape consumer-protection requirements merely because they are not banks.

This distinction became especially important in Supreme Court litigation concerning the correct market benchmark for determining whether interest charged by a non-bank mortgage lender was usurious.

8. Usury and Informal Finance

One of the most important legal protections surrounding non-traditional credit is Spain's 1908 Usury Act, commonly associated with the historical Ley Azcárate.

The legislation can invalidate credit arrangements where the agreed interest satisfies the statutory test for usury.

Spanish Supreme Court jurisprudence has made clear that the appropriate comparison generally requires consideration of the normal interest applicable to the relevant type of credit operation rather than mechanically comparing every transaction with a single universal interest rate.

This principle is especially important for alternative and informal lending because these transactions can involve higher prices than ordinary secured bank loans.

But a high interest rate is not automatically usurious merely because it exceeds a conventional mortgage rate. The relevant market and circumstances must be identified.

9. Anti-Money-Laundering Regulation

Informal and alternative finance can also create AML concerns.

Spain's principal framework is Law 10/2010 on the prevention of money laundering and terrorist financing.

The legislation identifies a broad range of regulated persons and financial businesses and expressly reaches professional loan intermediaries and certain professional non-bank lending activities.

Where a person falls within the regulated categories, relevant obligations can include customer due diligence, record keeping, internal controls and reporting requirements established by the legislation.

The policy rationale is straightforward: financial transactions should not become invisible to financial-crime controls simply because they take place outside conventional banks.

10. Cash-Based Financial Culture

Informal finance has historically been associated with cash because cash transactions can occur without bank transfers.

However, modern Spanish regulation increasingly encourages traceability.

Cash transactions can be subject to statutory restrictions, especially where businesses or professionals participate.

Consequently, an informal loan cannot be assumed to fall outside legal scrutiny merely because payment takes place outside a bank account.

The legal character of the transaction remains relevant.

11. Digitalisation of Informal Finance

Technology has blurred the distinction between formal and informal finance.

Traditional informal finance might involve:

Person A → Person B

Modern alternative finance can involve:

Borrower → online platform → investors/lenders

Once a digital intermediary organises financing systematically, additional regulatory questions arise.

These may concern:

• whether regulated credit intermediation occurs;
• consumer protection;
• crowdfunding regulation;
• payment services;
• AML requirements;
• data protection;
• advertising;
• creditworthiness assessment.

Thus, technology can transform what looks socially like peer-to-peer lending into a legally regulated financial activity.

12. Financial Inclusion

Informal finance can arise partly because conventional bank credit is unavailable or inconvenient.

People may rely on family or alternative lenders because they:

• lack sufficient conventional collateral;
• have irregular income;
• operate very small businesses;
• need short-term liquidity;
• have limited credit history;
• prefer relationship-based financing.

From a banking-law perspective, this creates a balance.

Regulation should protect borrowers against abusive practices while recognising that excessively restrictive access to legitimate alternative credit can affect financial inclusion.

Spanish law therefore contains several overlapping forms of protection rather than simply prohibiting all non-bank lending.

Important Case Law

There is no Spanish judicial category formally called “Informal Finance Culture Cases.” The most relevant jurisprudence instead concerns non-bank lending, consumer credit, usury, revolving credit and contractual protection.

1. Supreme Court Judgment 628/2015, 25 November 2015

This is one of Spain's leading modern usury cases.

The dispute involved revolving consumer credit with an APR of approximately 24.6%.

The Supreme Court concluded that the credit was usurious under the 1908 Usury Act. It considered the stipulated interest notably higher than the normal interest for the relevant comparison and manifestly disproportionate to the circumstances.

The Court also rejected the proposition that generally high default risk in consumer lending could, by itself, justify exceptionally high interest.

Importance for informal finance

The case demonstrates that alternative or easily accessible consumer credit remains subject to substantive limits.

A lender cannot automatically justify extremely expensive credit simply because the borrower would have difficulty obtaining conventional bank finance.

2. Supreme Court Judgment 149/2020, 4 March 2020

This major judgment further developed the Supreme Court's jurisprudence concerning revolving credit.

The Court explained that the relevant comparison should use the average interest applicable to the specific category of credit transaction concerned.

The contractual APR was approximately 26.82%, while the relevant average was slightly above 20%. The Court nevertheless regarded the difference as sufficiently significant in the circumstances to support a finding of usury.

Importance

The judgment refined the benchmark for analysing high-cost alternative consumer credit.

It confirmed that courts should not simply compare revolving credit with all consumer loans indiscriminately.

3. Supreme Court Judgment 643/2022, 4 October 2022

The Supreme Court revisited the revolving-credit jurisprudence.

It reiterated that the correct “normal interest” benchmark is generally the average rate applicable to the category corresponding to the transaction being examined.

Where official statistics provide a more specific category, that category should ordinarily provide the comparison rather than a broader category.

Importance for informal finance

This judgment demonstrates why the legality of alternative credit cannot be assessed merely by saying:

“The interest is much higher than a normal bank mortgage.”

Different credit products carry different market characteristics.

The correct legal comparison matters.

4. Supreme Court Judgment 257/2023, 15 February 2023

This decision is particularly important because it directly concerned a lender that was not a credit institution.

The case involved two mortgage loans granted in 2009 by a non-bank lender. The loans had fixed ordinary interest of 14%, with APRs of approximately 14.93%.

The Supreme Court considered how the usury test should operate where the lender belongs to the non-bank mortgage lending market.

It used official information relating to the relevant market under Law 2/2009 rather than automatically comparing the transaction with conventional bank mortgage rates.

Importance

This is one of the strongest authorities for understanding informal and alternative finance in Spain.

It establishes that:

non-bank finance has to be assessed within its legally relevant market context.

It also demonstrates that a non-bank lender is not automatically engaging in usury simply because its rates exceed those available from mainstream banks.

5. Supreme Court Judgment 258/2023, 15 February 2023

On the same date, the Supreme Court issued another important judgment concerning revolving credit.

The Court clarified its earlier jurisprudence and developed a more concrete approach to determining when revolving-credit interest is “notably” above the relevant market rate.

For revolving contracts within the framework addressed by the judgment, the Court used a difference of approximately six percentage points above the relevant average rate as the operative jurisprudential reference.

Later Supreme Court decisions have continued applying this approach.

Importance

The case increases predictability when courts assess high-cost revolving finance.

That is important for alternative finance because legal analysis should depend on established market benchmarks rather than a purely subjective view that an interest rate “looks high.”

6. Banco Español de Crédito SA v Joaquín Calderón Camino — C-618/10

This CJEU judgment originated in Spain and concerned consumer credit and unfair contractual terms.

The Court strengthened the responsibility of national courts to provide effective protection against unfair terms under EU consumer legislation.

Importance for informal finance

Where a professional alternative lender contracts with consumers, the fact that the credit exists outside traditional branch banking does not eliminate EU consumer protections.

Standard-form lending agreements remain capable of judicial review.

The judgment therefore establishes a broader principle:

alternative delivery channels do not eliminate mandatory consumer rights.

7. Mohamed Aziz v Caixa d'Estalvis de Catalunya — C-415/11

Although this famous case concerned mortgage lending by a financial institution rather than informal finance, its principles are highly relevant to secured alternative lending.

The CJEU examined whether Spanish mortgage-enforcement procedures provided effective protection against unfair contractual terms.

The judgment reinforced the requirement that consumers must have effective means of challenging unfair terms.

Informal-finance significance

Private or alternative secured finance cannot simply rely on strong contractual enforcement provisions while ignoring mandatory consumer protections where those protections apply.

13. What These Cases Establish

Taken together, the cases establish several important principles.

Principle 1 — Non-bank lending can be lawful

Spanish law does not treat every loan outside the banking system as illegal.

Principle 2 — The appropriate market matters

The interest charged by a non-bank lender should not automatically be compared with an economically different bank product.

Principle 3 — Usury remains an important limitation

The 1908 Usury Act continues to play an important role in modern consumer-credit litigation.

Principle 4 — Consumer law can follow the activity

A professional lender cannot necessarily avoid consumer protections simply because it is not legally classified as a bank.

Principle 5 — Informality does not eliminate contractual law

Private loans still create enforceable legal relationships.

Principle 6 — Professionalisation increases regulation

A recurring commercial lending operation is legally very different from an isolated loan between relatives.

14. Informal Lending Versus Regulated Banking

The basic distinction can be presented as follows:

The distinction is nevertheless functional rather than absolute. A supposedly “informal” business can become subject to extensive regulation when it operates professionally.

15. Social and Cultural Dimension

Informal finance cannot be understood entirely through legal doctrine.

Trust is often central to these arrangements.

A conventional bank usually evaluates a borrower through formal indicators such as income, debt, collateral and credit history.

Informal finance may instead depend heavily on:

personal relationship + reputation + family connection + reciprocal obligation + community trust.

These social mechanisms can reduce some information problems but create different risks.

For example, borrowers may enter arrangements without detailed documentation because they trust the lender. If disagreement subsequently occurs, proving the original terms can become difficult.

16. Risks Associated with Informal Finance

The principal legal and economic risks include:

Documentation risk: Parties may disagree about whether money constituted a loan or gift.

Pricing risk: High-cost professional lending can trigger usury disputes.

Consumer-protection risk: A professional lender may fail to comply with mandatory disclosure requirements.

AML risk: Professional financial activity may trigger statutory AML obligations.

Tax risk: Incorrect characterisation of transfers can create taxation issues.

Enforcement risk: Poorly drafted security or repayment terms may be difficult to enforce.

Fraud risk: Borrowers dealing outside established institutions may have fewer practical safeguards.

17. Informal Finance and Banks

Formal and informal finance are not necessarily complete substitutes.

A borrower might simultaneously use:

• a bank mortgage;
• family financing;
• supplier credit;
• shareholder loans; and
• alternative finance.

Consequently, banking lawyers may need to determine how these obligations interact.

For example, a bank evaluating a borrower's creditworthiness may need accurate information about existing private debts because those liabilities can affect repayment capacity.

Law 16/2011 itself emphasises creditworthiness assessment before qualifying consumer credit is granted.

18. Regulation Without Eliminating Alternative Finance

Spanish financial regulation does not simply attempt to force every financial transaction into a conventional bank.

Instead, the legal framework differentiates between activities.

An isolated private loan can remain fundamentally contractual.

Professional consumer lending attracts additional consumer protection.

Professional non-bank financial activity can attract AML obligations.

Mortgage and property-related financing can trigger specialised legislation.

Excessively priced lending can be tested under the Usury Act.

This produces a graduated regulatory structure.

19. Practical Example

Suppose three people provide financing to the same Spanish consumer.

Person A is the borrower's parent and makes a one-time interest-free €5,000 loan.

Company B operates a professional consumer-lending business and provides €5,000 at interest.

Bank C is an authorised credit institution and provides €5,000 through a conventional consumer loan.

Although all three transactions involve lending €5,000, their regulatory treatment can differ substantially.

Person A's arrangement may principally involve ordinary private-law and tax questions.

Company B may be subject to consumer-credit and other professional-lending requirements.

Bank C additionally operates within the full prudential banking framework.

The economic function—providing credit—is similar.

The institutional and legal context is different.

20. Conclusion

Informal finance cultures in Spain occupy the space between purely personal financial relationships and conventional institutional banking.

Spanish law does not establish a single “informal finance law.” Instead, several legal regimes interact depending upon the nature of the activity. These include private contract law, the 1908 Usury Act, Law 2/2009, Law 16/2011 on consumer credit, Law 10/2010 on anti-money laundering, mortgage-credit legislation and EU consumer-protection rules. Professional loan intermediaries and specified professional non-bank lenders are expressly included within Spain's AML framework.

The most useful case-law line includes Supreme Court Judgments 628/2015, 149/2020, 643/2022, 257/2023 and 258/2023, together with the CJEU's Banco Español de Crédito (C-618/10) and Aziz (C-415/11) jurisprudence. In particular, STS 257/2023 confirms the importance of distinguishing the non-bank lending market from conventional bank lending when applying the Spanish usury test.

The central principle is therefore:

Informal finance is not inherently unlawful, but increasing professionalisation, commercialisation and consumer exposure generally brings the activity progressively closer to Spain's regulated financial-law framework.