Annual Rent Increase for Tenants in Spain

Annual rent updates (caps and indexes) 3 min read · published September 11, 2025

If you are a tenant in Spain and are worried about an annual rent increase, this guide explains in clear language when a landlord can apply an update, what legal limits exist and which indices are used (for example, the CPI). We also point out the deadlines to receive the notification, how to review the contract and what steps to take if you believe the increase is abusive. The information focuses on tenants' rights, procedures to challenge an update and remedies before the civil courts. It includes practical tips to gather evidence, prepare a response and, if appropriate, take the matter to court.

What regulates rent updates?

Rent updates are mainly governed by the Ley de Arrendamientos Urbanos (LAU) and by what is agreed in the lease contract. Contracts may include an update clause that refers to an index (for example, the Consumer Price Index). When the law or the contract sets a procedure or limit, the landlord must comply before applying any increase.[1]

Contractual agreements can only modify what the LAU allows within certain limits.

How is the update calculated?

The most common method is applying a percentage linked to the CPI or other official indices that the contract mentions. If the contract does not set an index, one must follow the agreement and the applicable rules. The update can be annual and the calculation should be proportional to the months affected according to the clause.

Procedure and deadlines

Before applying the increase, the landlord must notify the tenant in writing of the amount and the effective period. Check your contract to see specific deadlines and the accepted form of notification.

  • Notification deadline: check the contract to know how many days of notice the clause requires.
  • Form of notification: it is common to use a written, provable method (burofax, certified letter or registered mail) that leaves a record.
  • Useful documents: keep receipts, the lease contract and communications related to the update.
Respond in writing to the notification if you detect calculation errors.

How to challenge a rent increase

If you consider the update incorrect or abusive, you can first complain to the landlord and, if there is no agreement, challenge it in court. Gather all documentation and meet procedural deadlines so you do not lose rights.

  • Gather evidence: contracts, receipts and communications that show what was agreed and payments made.
  • Send a written response to the landlord explaining the discrepancy and proposing a solution.
  • If there is no agreement, go to the Juzgado de Primera Instancia to file a claim and request the appropriate judicial protection.
Keep copies of everything you send and receive for the procedure.

Frequently Asked Questions

Can the landlord raise the rent without notifying me?
Generally no; the update must respect what is agreed in the contract and must be notified in writing with the notice period established therein.
Which index can be used to calculate the increase?
It can be the CPI or another index agreed in the contract; if not agreed, one must follow the LAU and applicable case law.
What deadline do I have to challenge an increase?
It depends on the act and the procedure; act as soon as possible, because procedural deadlines can be short and vary depending on the chosen route.

How to challenge a rent increase

  1. Check deadlines: identify the deadlines for response or claim depending on the case.
  2. Gather documentation: collect the contract, receipts, communications and the calculation of the increase.
  3. File a claim or complaint: if there is no agreement, file the action with the competent Court.

Key points

  • Check and respect deadlines to respond or file claims.
  • Keep all documents and receipts organized for the dispute.
  • Seek advice if you have doubts about the calculation or the notification.

Help and resources


  1. [1] BOE - Ley de Arrendamientos Urbanos (texto consolidado)
  2. [2] Ministry of Justice - Information on civil procedures
Bob Jones
Bob Jones

Editor & Researcher, Tenant Rights Spain

Bob writes and reviews tenant law content for various regions. They’re passionate about housing justice and simplifying legal protections for tenants everywhere.