Supreme Court Cancels Reverse Mortgage Interest and Orders Bank Refunds

According to a July 2, 2026 ruling by the Civil Chamber of the Spanish Supreme Court, Kutxabank has been ordered to return all remuneratory interest collected under a reverse mortgage contract signed in 2010. The landmark decision converts the disputed loan from a 6.5% interest rate to a 0% rate, handing a complete legal victory to the heirs of the deceased borrowers after a seven-year litigation battle.

Supreme Court Rules on Reverse Mortgage Transparency

The case centers on a reverse mortgage agreement signed in 2010 by an elderly couple with Kutxabank, according to reporting by El Mundo. Under the original terms, the couple received an initial disbursement of 47,611.53 € to cancel a prior conventional mortgage, 19,000 € in cash for personal expenses, 1.667,84 € for notary fees, and a monthly pension of 180 euros until their deaths. The contract fixed an annual interest rate of 6,5% specifying that the borrowers would not pay while alive, but that their heirs would face the accumulated debt upon their passing.

Although the contract stated that interest would be calculated simply, the bank applied compound interest through its fine print, causing the debt to grow exponentially each month. As the principal expanded, the 6.5% rate applied to a progressively larger base. According to the Supreme Court ruling penned by magistrate José Luis Seoane Spiegelberg, “Procede decretar la nulidad de la cláusula tercera del contrato que carece de transparencia en cuanto a la forma de cálculo de los intereses,” as reported by El Mundo.

Seven-Year Legal Battle and Lower Court Rulings

The contract concluded in 2019 when the last surviving spouse died, prompting the children to challenge the loan terms in court. The litigation moved through several judicial stages in Spain before reaching the Supreme Court via an appeal led by lawyer Arantxa Jaén Pedrero, as detailed by Capital.es. The initial action at a Court of First Instance in Valladolid yielded mixed results, declaring only default interest clauses null because the bank agreed to withdraw them during trial, while otherwise ruling in favor of Kutxabank.

The family appealed to the Provincial Audiencia of Valladolid, which ruled that charging interest on interest constituted an abusive and opaque practice. However, that court offered only a partial victory by decreeing that the family still had to pay simple interest rather than compound interest. Seeking a complete cancellation of the charges, the heirs took the case to the Supreme Court, which applied European Union jurisprudence regarding abusive clauses.

Application of EU Consumer Protection Doctrine

The Supreme Court invoked the doctrine of the Court of Justice of the European Union, which prohibits the judicial modification or partial integration of clauses declared abusive. Under this standard, because the interest clause failed transparency tests, it could not be rewritten to enforce simple interest; it had to be annulled entirely.

As a result of the ruling, Kutxabank must refund all improperly collected interest accrued over the nine years the contract remained active and throughout the subsequent years of litigation. According to expert calculations cited by El Mundo, the initial financial prejudice at the start of the legal process amounted to roughly 30,000 euros, while total reimbursements for remuneratory and legal interest ordered by the court approach 80,000 euros, as noted by Capital.es. Additionally, the bank was condemned to pay first-instance legal costs and return legal interest calculated from the exact date of each payment, while eliminating any delay penalties the lender had planned to impose on the heirs.