Guarantors and ICO state guarantees for young buyers in Spain

The bank does not trust you enough. If you cannot cover the 20% down payment or your profile raises doubts, they give you two options: get someone in your family to put their wealth on the line, or let the state cover what the bank refuses to risk. Different tools. Different consequences.

Private guarantor: what it really means

A guarantor (avalista) pledges everything they own — and everything they will own — to cover your debt if you stop paying. In practice, it is almost always the parents. Banks request a guarantor when your debt-to-income ratio is tight, when you ask for more than 80% LTV, or when your job stability is uncertain.

What many people fail to grasp is the scope. As one community member explained: "When your parents guarantee your mortgage, they guarantee it with all their assets — present and future. If you don't pay, they are liable not just for what they own now, but for whatever they acquire later."

Key points about private guarantors:

• It is a personal, unlimited guarantee unless specifically negotiated otherwise. The guarantor is liable for the entire debt, not just a portion.
• The guarantor appears in CIRBE (Spain's central credit registry). This affects their future borrowing capacity. If your parents need a loan, the bank will see they are guaranteeing your mortgage.
• It does not improve the interest rate. The guarantee helps get the deal approved. The bank reduces its risk but does not pass that benefit on to you. As someone noted: "I don't recall a case where having a guarantor actually improved the conditions."
• It is hard to remove. Once signed, the bank has no obligation to release the guarantor. You will need to negotiate this after several years of payment, once your LTV has dropped. The bank is in no rush to let go.

ICO state guarantee: the public alternative

The ICO first-home guarantee (aval ICO para primera vivienda) is a government measure for young buyers under 35 and families with children. The state guarantees the portion exceeding 80% financing, up to 100% of the property price. The risk the bank refuses to take, the taxpayer absorbs.

How it works in practice:

The ICO guarantee covers the gap between the bank's standard maximum (80%) and what you need (up to 100%). As one user clarified: "The 20% guarantee only covers the amount exceeding 80%. If you need 85%, the guarantee covers just that 5%."

Main requirements (as of March 2026):

• Under 35 years old (or families with dependent children)
• First home (vivienda habitual)
• Must not own another property
• Income below a threshold (varies by programme round)

What users actually report:

Those who secured ICO-backed mortgages are generally satisfied. One user shared: "ICO guarantee, we asked for 100%, property value 250,000, 2 holders, variable at 1.75% first year plus Euribor +0.69 after that, add-ons: salary domiciliation."

But the bureaucracy pushes many away. One user reported: "I've spent weeks comparing ICO conditions at different banks. Most told me upfront they don't finance 100% with ICO because it's too much paperwork." Banks get paid the same for an ICO deal as a standard mortgage, but the work is greater. Their incentive to help you is low. Another found that Abanca gave the best deal: "I didn't want to go the ICO route, and Abanca was the only one that offered me a good rate."

Banks that work with ICO guarantees (2025-2026 data):

• BBVA: Active participant, especially for under-36 borrowers.
• CaixaBank: Accepts ICO operations, though timelines are slow.
• Abanca: Good conditions reported by users.
• Ibercaja: Participates but requires strong add-on products (vinculaciones).
• Some smaller banks refuse to work with ICO due to the administrative burden.

Private guarantor or ICO?

If you qualify for the ICO guarantee, it is almost always the better choice: the state backs the loan without putting your family's assets at risk. A private guarantor should be a last resort, because it commits another person's entire patrimony with no clear limit.

That said, ICO spots fill up, the programme is not always open, and not all banks participate. If ICO is not available, a private guarantor can unlock the deal — but make sure everyone involved fully understands what they are signing.