Buying mortgage debt in Spain: how it works and the risks
Buying mortgage debt in Spain: what you acquire when you take over an unpaid loan at a discount, how the collateral is valued, how enforcement works and the risks you assume.
What discounted mortgage debt is
A mortgage loan is a credit backed by a property. If the borrower stops paying, the bank has the right to enforce the mortgage: to ask the court to sell the property at auction to collect the debt. That process can take a long time and the bank often prefers to sell the debt before reaching the end of the proceedings.
When the bank sells that unpaid mortgage loan to a third party, it does so at a discount: the buyer pays less than the face value of the debt. In return, they are subrogated to all the creditor's rights, including the right to enforce the mortgage. That is buying discounted mortgage debt.
Why the bank sells rather than enforces
Mortgage enforcement is a lengthy process. From when the bank starts the judicial proceedings to when the auction takes place and the bank gets paid can take one to several years. During that time, the unpaid loan consumes regulatory capital and generates provisions. Selling the debt at a discount gives immediate liquidity and cleans the balance sheet.
- Reduces bad-debt provisions, which impact the income statement.
- Frees up regulatory capital (Basel III requires capital against risk assets).
- Externalises management and judicial risk to a specialised investor.
- Converts a problem asset into liquidity in a much shorter timeframe.
How the collateral is valued
The mortgage collateral is the central element of the analysis. Its value determines the cushion between what you pay for the debt and what you can recover. To value it correctly several factors must be considered.
- Official appraisal: the value stated in the mortgage deed. It may be out of date relative to the current market.
- Current market value: the price at which similar properties actually sell in the area. The most useful reference.
- Cadastral reference value: an administrative reference from the Ministry of Finance, used to calculate some taxes.
- State of the property: renovated, in poor condition or under construction significantly changes the real value.
- Prior charges: if there is a senior mortgage predating yours, that debt ranks ahead of you for collection.
How mortgage enforcement works
If the borrower does not pay, the creditor (now you, as the buyer of the debt) can start mortgage enforcement proceedings. The process is governed by the Civil Procedure Act and the Mortgage Act. In broad terms, the creditor files the enforcement claim, the court demands payment from the borrower, requests the title and charges certificate from the Land Registry and, if there is no payment, calls the auction on the BOE Portal. The property does not need to be attached: the mortgage itself already binds it to the debt.
As the buyer of the debt, mortgage enforcement is your tool, not your goal: it is the route left if there is no settlement, and it usually ends in a judicial auction.
- Discounted purchaseYou pay less than the face value of the debt and are subrogated to all the creditor's rights, including the right to enforce the mortgage.
- Enforcement claimIf the borrower neither pays nor negotiates, as the creditor you file the mortgage enforcement claim.
- Demand and chargesThe court demands payment from the borrower and requests the title and charges certificate from the Land Registry.
- Auction on the BOEIf there is no payment, the court calls the auction on the BOE Portal, where as the enforcing creditor you may bid without lodging a deposit.
- Award and possessionIf you are awarded the property, it may still be occupied by the borrower or third parties and you will need to pursue eviction.
What happens if nobody bids depends on the date of the claim. In proceedings started before 3 April 2025, the creditor may request the award within twenty days for a percentage of the auction value (50 per cent, or 70 for a primary residence, with the nuances of the former article 671 LEC). In proceedings started afterwards, Organic Act 1/2025 removed that safety net: with no bids the creditor cannot request the award (article 647.2) and, at the debtor's request, the attachment is lifted (article 671).
That is the new risk for whoever buys the debt: if you reach the auction without bidding and nobody else bids, you lose control of the proceedings and the value of the credit suffers. As the enforcing creditor you may bid without lodging a deposit (article 647.2), so the prudent move is to enter your own covering bid during the auction. If you are awarded the property, it may still be occupied by the borrower or third parties and you will need to pursue eviction.
A fund buys from a bank a mortgage loan with 110,000 euros of outstanding principal, secured on a flat in a Spanish city with a market value of 130,000 euros. The purchase price is 65,000: a 41% discount on the nominal and 50% on market value. The borrower keeps not paying. The fund starts enforcement. After the court process, the auction ends with an award at 70,000 euros. The fund recovers 70,000 having invested 65,000. The return is modest in this scenario, before legal costs. In other scenarios the outcome can be better or worse.
| Item | Amount | What it represents |
|---|---|---|
| Outstanding loan principal | 110,000 euros | The face value of the debt the bank sells |
| Market value of the flat | 130,000 euros | The collateral backing the loan |
| Purchase price of the debt | 65,000 euros | A 41% discount on the nominal and 50% on market value |
| Auction award | 70,000 euros | What the fund recovers, before legal costs |
What happens if the borrower pays
When you buy mortgage debt you do not necessarily want to enforce: you want to collect. If the borrower is willing to negotiate, you can reach an agreement: a haircut (you forgive part of the debt in exchange for the borrower paying the rest), a refinancing (you give them more time or change the terms) or simply payment of what is owed.
For the borrower, negotiating with the new creditor can be a better outcome than enforcement, which leaves a negative record and may result in a residual debt if the auction price does not cover the total. For the investor, a friendly resolution is faster and avoids court costs.
Main risks
- Court timelines: mortgage enforcement can drag on for several years; it depends on the court and on the borrower's opposition.
- Property occupancy: if the occupant must be evicted, months and costs are added.
- Prior charges: a senior mortgage you did not detect can wipe out your margin.
- State of the asset: the property may have been damaged or deteriorated, reducing its real value.
- Borrower negotiation: if the borrower neither pays nor negotiates, the judicial route is unavoidable.
Three legal risks that get overlooked
- Litigious credit redemption: if you buy the credit once litigation has started, the debtor can extinguish it by paying you what you paid, plus costs and interest (article 1535 of the Spanish Civil Code). Your discount becomes theirs. Whether it applies to bulk portfolio purchases is debated in the courts.
- Opposition on unfair terms: a consumer debtor can oppose enforcement alleging unfair terms (early maturity, default interest, costs), and the court reviews them even of its own motion. It can suspend enforcement, reduce the amount claimed or make it unviable.
- Personal insolvency: an individual can also enter insolvency proceedings. If the debtor files, enforcement may be stayed and the debt may be affected by the discharge of unpaid liabilities. Ask a lawyer how far this reaches for a mortgage-backed credit.
In the InvertirDeuda catalogue you see mortgage debt assets with the data provided by the fund: the collateral, the stage of proceedings, known charges and the debt against the reference value. What is missing shows as no data. You and your adviser assess whether the deal makes sense.
Tell me about new assets in my province
New assets enter the catalogue every week: mortgage-backed debt, judicial auctions and foreclosure assignments. We send you the ones in your province, with the judicial stage explained, no account needed.
Frequently asked questions
- What happens if the borrower does not pay the mortgage debt I bought?
- You can start mortgage enforcement proceedings to collect against the property used as collateral, within the timelines and procedure set by the Civil Procedure Act and the Mortgage Act.
- What is the difference between buying a mortgage and buying a property?
- Buying the mortgage (the debt) gives you the right to collect and, if you cannot collect, to enforce. You do not own the property from the outset. Buying the property (at auction or directly) gives you ownership immediately, subject to registration formalities and possible occupants.
- Does the mortgage collateral always cover the full debt?
- Not necessarily. If the property value has fallen since the mortgage was granted, the auction may not cover the total debt. In that case a residual balance may remain, although Spanish legislation has introduced liability limits in certain circumstances.
- What is dación en pago and how does it affect the investor?
- Dación en pago is an agreement by which the borrower hands over the property to the creditor in exchange for cancelling the debt. If the borrower proposes this, the investor who bought the debt can accept: they receive the property and the debt is cancelled, avoiding court proceedings.
- Do I need to be a company to buy mortgage debt?
- It is not mandatory, but many sizeable deals are structured through a company for tax and liability reasons. For smaller or medium amounts, a private individual can buy directly. Consult a tax adviser before structuring the deal.