If you are renting in Spain and approaching the end of your tenancy, one issue matters more than almost any other: your deposit.

Tenants often hear conflicting advice online, particularly around the idea that landlords have “31 days to provide receipts” and that if they miss that deadline, they lose the right to charge anything. That version is not legally precise, but there is a strong and lawful position tenants can rely on.

This article explains what Spanish law actually requires, what landlords must do within the legal timeframe, how evidence and receipts work in practice, and how to calculate and claim interest if your deposit is returned late.

Residential tenancies in Spain are governed by the Ley de Arrendamientos Urbanos (LAU). Deposit rules are set out in Article 36.

The law states:

  • The landlord must return the deposit within one month of the tenant returning the keys.
  • If the deposit is not returned within that month, the amount automatically accrues legal interest.

This obligation applies nationwide.

Official source:

https://www.boe.es/buscar/act.php?id=BOE-A-1994-26003

The tenant does not need to request interest in advance. It arises automatically once the one-month period expires.

What the Landlord Must Do Within One Month

Within one month of the keys being returned, the landlord must either:

  1. Return the full deposit, or
  2. Return the deposit minus justified deductions, with a clear explanation

If the landlord intends to make deductions, they must be able to justify them properly.

This leads to an important point.

Receipts, Evidence, and the Burden of Proof

Spanish tenancy law places the burden of proof entirely on the landlord.

That means:

  • The landlord must prove that damage exists
  • The landlord must prove it goes beyond normal wear and tear
  • The landlord must prove the cost is reasonable and necessary

In practice, this requires:

  • An itemised explanation of each deduction
  • Supporting evidence such as invoices, receipts, or professional quotes
  • Photos or inventories showing the condition at check-in and check-out

While the LAU does not explicitly say “receipts must be provided within 30 days”, courts consistently reject deductions that are vague, unsupported, or produced late without evidence.

Practical, legally sound advice

Tenants are not required to chase receipts immediately.

If the landlord:

  • Does not return the deposit within one month, and
  • Does not provide a clear, evidenced breakdown of deductions,

then:

  • The landlord is already in breach of Article 36
  • Interest starts accruing automatically
  • Any later attempt to justify deductions will be heavily scrutinised

Courts routinely side with tenants where deductions are poorly documented or reconstructed after the deadline.

This is why, in practice, waiting out the legal period often strengthens the tenant’s position, even though there is no automatic forfeiture rule in the statute.

Normal Wear and Tear vs Chargeable Damage

A landlord may only deduct for damage beyond normal use.

Generally accepted examples of normal wear and tear include:

  • Faded paint
  • Minor scuffs or marks on walls
  • Worn fixtures or fittings due to age
  • Standard end-of-tenancy cleaning

Examples that may justify deductions include:

  • Broken furniture
  • Holes in walls beyond standard fixings
  • Serious staining or neglect
  • Damage caused by misuse

The key test is reasonableness and proportionality.

Once the one-month deadline passes, interest accrues automatically.

Which interest rate applies?

The applicable rate is the statutory legal interest rate of money (interés legal del dinero), set annually by the Spanish government.

For reference:

  • 2023: 3.25 percent
  • 2024: 3.25 percent
  • 2025: 3.25 percent (unless updated)

Current rates are published here:

https://www.boe.es

How to calculate the interest

The formula is:

Deposit amount × legal interest rate ÷ 365 × number of days overdue

Example

  • Deposit: €1,500
  • Legal interest: 3.25 percent
  • Delay: 90 days

Calculation:

€1,500 × 0.0325 ÷ 365 × 90 = approximately €12.02

The longer the delay, the higher the interest. Courts award this routinely when requested.

Catalonia-Specific Protection: INCASÒL

If your rental was in Catalonia, there is an additional and very important protection.

By law, landlords must register and lodge the deposit with INCASÒL, the Catalan deposit authority.

Tenants can check this online.

If the deposit was not lodged:

  • The landlord is in administrative breach
  • Fines may apply
  • The tenant gains significant leverage in negotiations

In many cases, simply pointing out that the deposit was not registered results in a rapid full refund.

INCASÒL deposit check:

https://incasol.gencat.cat/ca/2-serveis_i_tramits/Fiances-de-lloguers/informacio/diposit-de-fiances/

Failure to lodge the deposit does not automatically void the tenancy, but it is illegal and taken seriously by the authorities.

What to Do If the Deposit Is Not Returned

A sensible escalation path is:

  1. Wait until the one-month deadline has passed
  2. Request the full deposit plus accrued interest, or a fully itemised, evidenced deduction list
  3. If ignored, send a formal written demand
  4. If necessary, file a juicio verbal (small civil claim)

Deposit disputes are low-cost, relatively fast, and generally tenant-friendly.

Final Takeaway

Spanish tenancy law offers strong protection to tenants who understand the process.

  • Landlords have one month to return the deposit
  • Interest accrues automatically after that period
  • Deductions must be justified, reasonable, and proven
  • Late or unsupported claims are weak
  • In Catalonia, failure to register the deposit with INCASÒL is illegal

You do not need to argue early. You do not need to chase receipts on day one.

Knowing the deadline, understanding how interest works, and acting calmly but firmly once the legal clock has run is often the most effective approach.

For more advice about housing, or living in Barcelona – join our WhatsApp community Barcelona English Speakers.