Spanish tax agency auctions (AEAT): how to buy property in 2026

When someone owes money to Hacienda (the Spanish tax authority) and doesn't pay, the Agencia Tributaria (the Spanish tax agency) can seize their assets and sell them at auction to collect the debt. The process is similar to that of court auctions, but with some important differences. And it has an advantage very few people know about: competition is usually considerably lower than at auctions called by the courts.

How the tax agency's auction process works

When the AEAT (Agencia Estatal de Administración Tributaria, the tax agency) seizes a property, it values it and calls a public online auction through the same portal as court auctions: subastas.boe.es. The general conditions are similar, but there are relevant differences:

• The auction value is 100% of the valuation, minus the prior charges that survive; at the second auction 80% applies, and at the third and subsequent ones, 60%. The minimum bid is generally 10% of the auction value, and if the best offer reaches 50% of the auction value the Mesa (the auction board) awards the property; below that, it decides whether the offer is sufficient.
• The deadline for paying after the award is usually 15 working days, shorter than at court auctions. Your financing has to be even more finely tuned.
• The prior deposit is still 5% of the auction value.
• The enforcing body is the relevant Delegación of the AEAT (its regional office), not a court. The post-award formalities are handled with them.

Why there's less competition at tax agency auctions

Most private investors only know about auctions called by the courts. Tax agency auctions, although they're on the same portal and just as accessible, have less media visibility and fewer investors watching them systematically. That means there are often fewer bidders and a better chance of winning at a price close to the starting price.

How to identify them on the BOE portal

In the subastas.boe.es search engine, you can filter by "órgano gestor" (managing body). Tax agency auctions appear under the name "Agencia Estatal de Administración Tributaria" or that of the relevant regional Delegación. You can also filter by auction type "Administrativa" (administrative) to separate these from court auctions.

What assets the tax agency auctions

Everything: flats, houses, commercial premises, building plots, shareholdings in companies, cars, machinery. In the property segment, it's common to find assets belonging to owners who have had serious tax problems (businesspeople, bankrupt self-employed people, tax fraud established by a court ruling). Sometimes they're assets in excellent condition that the owner looked after well until the debts overwhelmed them.

The distinctive risk: occupancy status

As with court auctions, the property may be occupied. But at tax agency auctions, the AEAT usually has less information about the real condition of the property than a court would. The edicto (the auction notice) may be more succinct. Before bidding, request the nota simple (the Land Registry extract) and, if you can, visit the area to check how it looks from the outside.

Frequently asked questions about tax agency auctions

How do I identify an Agencia Tributaria auction on the BOE?
In the subastas.boe.es search engine, filter by auction type "Administrativa" and by managing body "Agencia Estatal de Administración Tributaria" (or the relevant regional Delegación). That way you separate the AEAT's auctions from those called by the courts.

How long do I have to pay if I win the property?
The usual deadline after the award is 15 working days, shorter than at court auctions. You need pre-approved financing or your own capital available before you bid; there's no room to start looking for a mortgage afterwards.

Can a tax agency auction be stopped?
The debtor can halt the auction by paying off the debt (principal, surcharges and interest) or by reaching a deferral or instalment agreement with the AEAT before the award. Once the asset has been awarded, stopping it is much harder. If it's your own home that's affected, consult a tax adviser as soon as possible.

How do they differ from court auctions?
The process and the portal (BOE) are the same, but the enforcing body is the AEAT rather than a court, the payment deadline is usually shorter and the information in the notice may be more succinct. In return, they usually have fewer bidders.

Related resources: Learn to find your way around the BOE auction portal, where these auctions are published, and compare them with Social Security (TGSS) auctions. To see assets at auction right now, filtered by AI Score, go to RadarPro's auction search.