Private Loan Agreement Spain (Préstamo entre Particulares)

A Private Loan Agreement Spain (Contrato de Préstamo entre Particulares) is a written contract governed by Articles 1740 to 1755 of the Código Civil español by which one private individual (prestamista or lender) transfers a sum of money or fungible goods to another private individual (prestatario or borrower), and the borrower undertakes to return an equivalent sum or quantity of the same goods at a defined future date, with or without interest (intereses). Article 1740 CC defines the contrato de préstamo or mutuo as the contract 'por el cual una de las partes entrega a la otra, o alguna cosa no fungible para que use de ella por cierto tiempo y se la devuelva, en cuyo caso se llama comodato, o dinero u otra cosa fungible, con condición de devolver otro tanto de la misma especie y calidad, en cuyo caso conserva simplemente el nombre de préstamo.' When money is the subject of the loan, the agreement is specifically a mutuo dinerario or préstamo de dinero.

Under Article 1755 of the Código Civil, a loan between private individuals is presumed to be gratuitous (without interest) unless the parties expressly agree otherwise in writing — 'No se deberán intereses sino cuando expresamente se hubiesen pactado.' This means that if the loan agreement does not explicitly state an interest rate, no interest is due regardless of the loan amount or duration. However, where interest is agreed, Article 1108 CC provides that the applicable rate is the pactado (agreed rate), or where no rate is specified but interest is stated to apply, the interés legal del dinero — the statutory interest rate published annually in the Ley de Presupuestos Generales del Estado — applies as the default.

Loans between private individuals in Spain have significant tax implications that many borrowers and lenders overlook. Under Article 15 of Real Decreto Legislativo 1/1993 (Texto Refundido de la Ley del Impuesto sobre Transmisiones Patrimoniales y Actos Jurídicos Documentados — TRLITPAJD), loans between individuals are subject to Impuesto sobre Transmisiones Patrimoniales (ITP) under the modality of Transmisiones Patrimoniales Onerosas (TPO), although they benefit from a mandatory exemption (exención) under Article 45.I.B.15 TRLITPAJD. Despite the exemption, the prestatario (borrower) must still file a declaration of the loan with the competent tax authority (Agencia Tributaria autonómica) using the Modelo 600 form within 30 working days of the loan agreement date, noting the exemption. Failure to file can result in administrative penalties under Ley 58/2003 General Tributaria, and the undeclared loan may be treated as a donation (donación) subject to the Impuesto sobre Sucesiones y Donaciones (ISD) — potentially at rates up to 34% under the autonomous community rules — if the AEAT concludes the funds were transferred without a genuine repayment obligation.

For loans on which interest is agreed and paid, the interest received by the lender is subject to IRPF (Impuesto sobre la Renta de las Personas Físicas) as rendimiento del capital mobiliario (income from movable capital) under Article 25.2 of Ley 35/2006 del IRPF. The borrower must withhold IRPF at the applicable retención a cuenta rate (currently 19%) on interest payments to the lender and report the withholding to the AEAT. The lender reports the net interest as income in their annual IRPF declaration (Declaración de la Renta — Modelo 100). Failure to apply correct tax withholding exposes both parties to regularisation and surcharges by the AEAT.

Under Spanish civil law, a simple private document (contrato privado) is sufficient to create a valid and binding loan agreement under Article 1278 CC — notarisation is not mandatory for a préstamo entre particulares. However, a loan formalised in an escritura pública before a Notario has significantly stronger evidentiary value in judicial proceedings under Articles 1216 and 1218 CC, and a notarised loan document with a mortgage guarantee can be registered in the Registro de la Propiedad and directly enforced through the expedited notarial enforcement procedure (vía de apremio) under the Ley de Enjuiciamiento Civil (LEC). Interest on loans between private individuals is subject to the usury prohibition under Ley de 23 de julio de 1908 de Represión de la Usura (Ley Azcárate) — loans at an interest rate 'notablemente superior al normal del dinero' or 'manifiestamente desproporcionado con las circunstancias del caso' may be declared null and void by the Juzgado de Primera Instancia.

A Private Loan Agreement Spain is needed whenever one private individual lends money to another — whether between family members, friends, or acquaintances — to create a formal record of the loan obligation, establish the repayment terms, and comply with the tax declaration requirements imposed by the Agencia Tributaria.

A written préstamo entre particulares is required when parents lend money to their adult children for the purchase of a first home (vivienda habitual) or to finance a business startup — without a formal loan agreement, the transfer of funds may be reclassified by the AEAT as a donation (donación) subject to the Impuesto sobre Sucesiones y Donaciones (ISD) at rates up to 34% in some autonomous communities. A properly documented loan with a genuine repayment obligation protects both parties from this reclassification.

The contract is needed when individuals within a family group agree to a succession advance (adelanto de herencia) structured as a loan rather than a gift — the loan framework preserves flexibility for future renegotiation and avoids the immediate ISD tax event of a donation, while the Modelo 600 filing documents the ITP exemption.

A private loan agreement is needed when one individual lends money to another to finance a specific purpose — home renovation, car purchase, medical expenses, or business working capital — and the parties want a clear legal document establishing the repayment schedule, interest provisions (if any), and consequences of default.

The contract is required when individuals acting as angel investors provide personal loans to startup companies (startups or emprendedores) as a bridge financing mechanism — the loan agreement may include convertible note provisions (préstamo convertible) allowing conversion into equity at a future funding round, which requires careful drafting under the Ley de Sociedades de Capital (RDL 1/2010) and securities law considerations.

A written loan agreement between private individuals is needed when a borrower needs documentary evidence of the source of funds for a property purchase — the Notario, the mortgage lender, or the Agencia Tributaria may require evidence that funds transferred from a family member are a genuine loan (with a documented repayment obligation) rather than a gift, to avoid ISD assessment.

The agreement is also needed when one individual lends money to another and the parties want to preserve the lender's right to claim interest on the loan — without a written agreement specifying an interest rate under Article 1755 CC, no interest is legally payable regardless of the parties' intentions or oral agreements.

Under the Ley Cambiaria y del Cheque (Ley 19/1985), promissory notes and bills of exchange are governed in Spain. The Banco de España supervises banking under Ley 10/2014. The Comisión Nacional del Mercado de Valores (CNMV) regulates securities markets. The AEAT administers IVA (Ley 37/1992) and IRPF (Ley 35/2006). The Ley 3/2004 governs late payment in commercial transactions with statutory interest.

A valid Private Loan Agreement Spain under Código Civil Articles 1740–1755 must contain the following essential elements to be legally enforceable, to comply with the ITP-AJD Modelo 600 tax declaration requirement, and to protect the lender's right to repayment.

Identification of Parties: Full legal name, DNI/NIE/passport number, fiscal domicile (domicilio fiscal), and contact details of both the prestamista (lender) and the prestatario (borrower). For the tax declaration (Modelo 600), the NIF of both parties is required. If either party is married under the régimen de gananciales (community of property), their spouse's consent may be required for loans that could affect community assets.

Loan Amount: The agreed principal amount (principal or capital del préstamo) stated in euros, expressed in both figures and words (en cifras y en letras). For evidentiary clarity, the agreement should confirm the method of disbursement — bank transfer (transferencia bancaria from account IBAN XXXX to account IBAN XXXX), cash payment, or certified cheque — and the disbursement date.

Loan Purpose: An optional but advisable statement of the purpose for which the loan is made — e.g., 'para la adquisición de vivienda' or 'para la financiación de gastos de negocio'. The stated purpose helps evidence the genuine loan nature of the transfer for ITP-AJD and ISD purposes before the Agencia Tributaria.

Repayment Terms: The agreed repayment schedule — whether a single lump-sum repayment (pago único) on a defined maturity date, periodic instalments (cuotas periódicas) on defined dates, or a flexible repayment arrangement (disposición libre) with a defined final repayment deadline. The schedule should specify the amount and date of each instalment, the payment method (bank transfer), and the bank account details. The total amount repayable and any prepayment provisions should also be stated.

Interest Rate: Whether the loan is gratuitous (sin interés) — relying on the Article 1755 CC presumption of no interest — or interest-bearing (con interés). If interest is agreed, the annual interest rate (tipo de interés anual) must be explicitly stated in writing. Where interest is charged, the lender must declare the interest as rendimiento del capital mobiliario in their IRPF return, and the borrower must withhold IRPF retención a cuenta at 19% on each interest payment and report it to the AEAT. The agreed rate must not be 'notablemente superior al normal del dinero' under Ley de Represión de la Usura — courts have struck down rates exceeding double the statutory interest rate (interés legal del dinero) as usurious.

Default Interest: The default interest rate (interés de demora) applicable from the date a repayment instalment falls overdue until actual payment, expressed as an annual percentage. Default interest under Article 1108 CC defaults to the interés legal del dinero if not otherwise agreed — Spanish courts have enforced agreed default rates up to approximately 2–3 times the statutory rate without characterising them as punitive.

Consequences of Default: The events constituting default (e.g., failure to pay any instalment within a defined grace period), the acceleration clause (cláusula de vencimiento anticipado) entitling the lender to demand immediate repayment of the entire outstanding balance upon default, and any agreed contractual penalty (pena convencional) under Article 1152 CC.

Security: Whether the loan is unsecured (préstamo sin garantía) or secured — by personal guarantee (fianza or aval personal), pledge (prenda), or mortgage (hipoteca). If a mortgage is granted, the mortgage must be constituted in an escritura pública and registered in the Registro de la Propiedad to be effective against third parties under the Ley Hipotecaria.

Tax Declaration: An acknowledgement by both parties of their obligation to file the Modelo 600 form with the competent Agencia Tributaria autonómica within 30 working days of the loan agreement date, claiming the mandatory ITP exemption under Article 45.I.B.15 of Real Decreto Legislativo 1/1993, and their respective obligations regarding IRPF withholding on interest payments.

Governing Law and Jurisdiction: Spanish law (specifically the Código Civil) governs the agreement. Disputes are submitted to the Juzgado de Primera Instancia of the lender's or borrower's domicile (at the lender's option for collection proceedings under Article 50 Ley de Enjuiciamiento Civil). The parties may agree to prior mediation under Ley 5/2012 de mediación en asuntos civiles y mercantiles.

Forms-legal.com provides this Private Loan Agreement Spain template as a practical starting point for inter-personal loan arrangements. For large loan amounts, loans with property security (hipoteca), or loans between family members involving estate planning considerations, the agreement should be reviewed by a qualified abogado and a gestor fiscal to confirm correct ITP, ISD, and IRPF treatment before signing.

Under the Ley Cambiaria y del Cheque (Ley 19/1985), promissory notes and bills of exchange are governed in Spain. The Banco de España supervises banking under Ley 10/2014. The Comisión Nacional del Mercado de Valores (CNMV) regulates securities markets. The AEAT administers IVA (Ley 37/1992) and IRPF (Ley 35/2006). The Ley 3/2004 governs late payment in commercial transactions with statutory interest.