Buying non-performing loans in Spain means acquiring an NPL (non-performing loan): a mortgage loan whose borrower has stopped paying, usually for more than 90 days. Buying that debt is not buying a home: you are buying the claim itself, with the mortgage as security. The buyer steps into the bank's shoes as creditor, not into the owner's, and also inherits something very few industry guides explain clearly: a legal right that the debtor keeps and that can unwind the deal months after it has closed.
What a non-performing loan (NPL) is and what exactly you buy
An NPL (non-performing loan, also called a defaulted or bad loan) is a mortgage loan whose borrower has stopped making payments, typically for more than 90 days, and which the bank has classified as doubtful on its balance sheet. Buying an NPL means buying that loan, not the property: you acquire the bank's legal position as creditor, with the mortgage recorded at the Land Registry (Registro de la Propiedad) as security for repayment.
In practice this gives you three rights: to claim the debt from the borrower, to continue the mortgage foreclosure if it has already started, or to negotiate directly with the borrower a dación en pago (a deed in lieu of foreclosure, where the property is handed over to settle the debt), a write-down or a payment deferral (SMorán Abogados). The property still belongs to the debtor until a court transfers it, through an auction or a court award. That is why the status of the court file at the time of purchase shapes everything: the more advanced it is (close to auction, with the valuation done and the encumbrances known), the more predictable the timeline; the earlier the stage, the more uncertainty you buy along with the discount.
The most expensive mistake: confusing the loan with the bricks
Buying defaulted mortgage debt is not buying a cheap flat. It is the most common misconception and the one that has cost poorly informed investors the most money, partly because much of the content circulating about this market is written by people who sell access to it. When you buy an NPL you acquire a credit right, and you have to enforce it (by negotiating with the debtor or following the judicial mortgage foreclosure procedure) before there is any chance of becoming the owner. In between lie months, sometimes years, of legal process with an uncertain outcome, and the original owner still has legal tools to derail the outcome you had planned.
Where the discount comes from, and why the percentage varies so much by source
Banks sell portfolios of defaulted mortgage debt at significant discounts to the face value of the debt. Precision matters here, because the figures quoted in the industry vary widely depending on who publishes them: platforms aimed at retail investors cite discounts of 40% to 70% on the value of the underlying property (InversionNPL; subastanomics), while more general sources speak of a 20% to 60% range (Analitica.com). None of these figures comes from independent market statistics; they come from those who sell access to these deals, so treat them as a rough range, not a hard number. What every source agrees on is the reason: the discount is not a gift, it is the price of taking on a risk and an uncertainty the bank prefers not to carry. Selling frees up regulatory capital, ends the need to provision for the loan as a bad debt and shifts the cost and time of recovery to whoever buys the portfolio.
Who sells this debt in Spain and how investors get access
Defaulted mortgage debt is usually sold in portfolios of dozens or hundreds of loans, managed by specialist servicers, the companies that manage and recover loans and repossessed properties on behalf of banks and funds (Haya Real Estate, Altamira, Solvia and Aliseda held much of the Spanish market after the sector consolidated, and since December 2024 Solvia has also brought Haya Real Estate and Aktua under a single brand, according to Brains RE News). The buyers are mostly institutional funds, not private individuals directly.
Access for private investors exists, but it is indirect: through specialist platforms that pool retail capital to buy portfolios or individual loans (the Spanish market includes players such as Indemo, Housebox Capital, Equus Capital, InversionNPL and Inmubi, the latter with more than 13,000 assets analysed in its database since 2019, by its own count), or by buying an individual loan that has already reached a judicial auction, where any third party can take part without going through the institutional portfolio market. The entry ticket these platforms quote usually starts at around €30,000 to €50,000 per individual deal, although that is a market figure, not a legal minimum. That second route, the auction, runs through the BOE Auction Portal (the online auction site of the Boletín Oficial del Estado, Spain's official state gazette), which we explain step by step in a separate guide.
The right almost no guide mentions: redemption of a litigious claim
Here is a real, verifiable legal point that rarely appears in commercial content about NPLs, and that every buyer should know before closing a deal. Article 1535 of the Spanish Civil Code (Código Civil) gives the debtor of a litigious claim, meaning a debt already being contested in court, the right to extinguish it by paying the buyer the price the buyer paid for it, plus legal costs and interest on that price from the date it was paid. Spanish lawyers call this the retracto de crédito litigioso. A claim counts as litigious once the debtor has answered the lawsuit relating to it, and the debtor has nine days from when the new creditor demands payment to exercise this right.
In practice, this means that if you buy an individual NPL that is already in litigation and the debtor decides to use this mechanism, they can take the loan off your hands by paying only what you paid for it, not the face value of the debt: your margin disappears at a stroke. There is a nuance that reduces this risk for buyers of large portfolios: Spain's Supreme Court has held that when multiple loans are sold under a single contract, with the whole portfolio and a single price as its object, article 1535 does not apply and the right of redemption cannot be exercised. The risk is therefore higher when you buy an individual loan than when you buy into a diversified portfolio through a platform.
The specific risks you take on when buying this debt
- Court risk: mortgage foreclosure in Spain can take 12 to 24 months in standard cases, and longer in overloaded courts or where procedural issues arise.
- Redemption risk: if you buy an individual loan that is already litigious, the debtor can extinguish the debt by paying you only what you paid for it (article 1535 of the Civil Code), wiping out your margin.
- Partial recovery risk: the debtor may pay, negotiate a write-down, or the property may be worth less than estimated by the time it reaches auction.
- Hidden encumbrance risk: later registered charges, other creditors, or occupancy situations that only come to light well into the process.
- Total illiquidity risk: your capital is tied up for the whole process, with no option of a partial sale and no guaranteed early exit.
What all this looks like in numbers: a hypothetical example
The figures below are a hypothetical example built to explain the mechanics, not a documented real case. Do not treat them as a benchmark for expected returns: our article on returns and risks explains why the figures published by the industry are not representative of an average outcome.
| Item | Illustrative amount |
|---|---|
| Face value of the mortgage debt | €120,000 |
| Purchase price of the debt (~55% discount) | €54,000 |
| Estimated legal and court costs (procurador or court representative, valuation, registry) | €6,000 |
| Refurbishment cost after the court award (estimated) | €15,000 |
| Total investment | €75,000 |
| Market value of the property after refurbishment (estimated) | €110,000 |
| Illustrative gross margin | €35,000 |
Hypothetical example. It does not include taxes, the real duration of the court process (which can exceed a year) or the equally real scenario in which the debtor pays, negotiates, exercises the article 1535 redemption right if the loan is litigious and was sold individually, or the process drags on and shrinks or wipes out the margin.
What to check before buying your first loan
Buying defaulted mortgage debt means buying a right, not bricks: the discount to face value compensates for real court and recovery risk, it is not a property bargain in disguise, and that right coexists with another one held by the debtor that few guides mention, the redemption right under article 1535 of the Civil Code. If the process moves on to auction, the next thing you need to understand is how a cesión de remate (assignment of the auction bid to a third party) works and, after that, what returns and risks this market really offers before you commit capital.
Average return (IRR) on buying defaulted mortgage debt
As of this guide, there are no independent statistics (from the Bank of Spain or the CNMV, Spain's securities regulator) on the average return private investors earn from buying NPLs in Spain. Published figures almost always come from the platforms that sell access to these deals or from individuals sharing their own experience, so read them with that caveat in mind.
An important technical point the industry itself makes: the right metric for comparing deals of different lengths is IRR (the annualised return), not simple ROI, because an NPL with a 40% ROI over 12 months is not comparable with another with the same ROI over 36 months (Inmubi, NPL Spain guide 2026). With that caution in mind, some platforms have published annualised IRR estimates close to 69% for specific buy-and-sell cases, but that is a theoretical estimate for one specific deal, not a market average, and should not be taken as an expected return.
The full breakdown of these figures, with the sources that are actually published and attributed, and the documented legal risks that can reduce or eliminate the margin (starting with the article 1535 redemption right explained above), is in our article on the returns and legal risks of investing in NPLs in Spain.
Frequently asked questions
What does NPL mean in real estate?
NPL stands for non-performing loan, a defaulted or bad loan. It is the technical term for what the retail market simply calls defaulted mortgage debt: a loan secured on a property whose borrower has stopped paying, usually for more than 90 days.
Can a private individual buy defaulted mortgage debt in Spain?
Yes, although it is neither the norm nor the most accessible option. The institutional NPL portfolio market is dominated by funds and servicers. Private investors mostly get access through specialist investment platforms or by taking part directly in judicial auctions of individual loans.
What happens if the debtor starts paying after you buy the debt?
The new holder of the loan receives the payments under the terms of the original loan or the renegotiated ones. It is one of the possible exit scenarios, alongside foreclosure, negotiating a dación en pago (deed in lieu) or the debtor exercising the article 1535 redemption right if the loan is litigious.
Can the debtor settle the debt by paying less than they originally owed?
Yes, in one specific case: if the loan is litigious and was sold individually (not within a portfolio sold as a single object), article 1535 of the Civil Code allows the debtor to extinguish the debt by paying the buyer what the buyer paid for it, not the original face value. It is a real risk you need to know about before buying an individual loan.
Can you lose all the money invested in defaulted mortgage debt?
Yes, it is a real risk, especially if the property securing the loan loses value, unexpected encumbrances appear, or the court process drags on until the deal stops making economic sense. It is not a capital-guaranteed investment.
At Reental we turn this kind of opportunity into accessible investment, without the operational friction of handling a lawsuit or a foreclosure yourself: explore Reental's active projects.
Legal notice
This content is for information only and does not constitute individual financial, legal or tax advice. Buying defaulted mortgage debt involves significant risks, including the possible total loss of capital. Consult a lawyer specialising in mortgage law before investing. Reental does not market NPLs as its own product.
Data and sources: SMorán Abogados, Gloval, Brains RE News, Analitica.com, InversionNPL, subastanomics.com, KPMG/ECB (ECB guidance to banks on non-performing loans), Comillas University academic repository and Almacén de Derecho (article 1535 of the Civil Code, redemption of litigious claims), Inmubi (NPL Spain guide 2026, IRR vs ROI).
