Rent increases: how much your landlord can actually raise

An increase is only valid if the contract provides for it

Rent is reviewed when the contract says it is reviewed. If yours contains no review clause, the price stands for the whole term: your landlord cannot raise it mid-tenancy, however much the market has moved.

And where a clause does exist, the review is annual and communicated in writing. A verbal increase, a retroactive one, or one applied with no notice is not enforceable.

Spain: the reference index and stressed-market areas

For years rents were updated with CPI inflation. The housing act changed that: updates became capped, and CPI was replaced by a rental-specific reference index published by the national statistics office, so that housing costs no longer track general inflation.

On top of that, autonomous communities can declare stressed residential market areas. Inside them, extra limits apply both to the annual review and to the price of new contracts, and the landlord must tell you whether the property sits in one. The actual percentages are set each year, so check your region’s published figures before you accept anything.

The Netherlands: points, the regulated sector and huurverhoging

For a large share of homes the maximum price is not set by the landlord but by the woningwaarderingsstelsel, a points system scoring floor area, insulation, facilities and energy label. If the property falls in the regulated band there is a legal maximum rent and a maximum annual increase set by government.

The Wet betaalbare huur, in force since 2024, extended that regulation to the mid-market middenhuur band, so many homes that used to be free-market now have a cap. If you believe you are paying above what the points allow, the Huurcommissie can review it and order a reduction.

How to check whether the increase is correct

• Reread the review clause: which index applies, and on what date.
• Confirm it was communicated in writing and with enough notice.
• Recalculate the amount yourself. Arithmetic errors are more common than you would expect.
• In Spain, check whether your municipality is designated a stressed area.
• In The Netherlands, run the points calculation for your home before accepting.
• Keep the message or letter. It is the evidence of what you were told, and when.

If the increase is excessive

Reply in writing saying you do not accept it and why: there is no clause, the wrong index was applied, or it exceeds the legal cap. While it is being resolved, keep paying the rent you believe is correct and keep a record of every payment. Withholding rent puts you in breach instead.

In Spain you can go to the consumer office or your region’s housing service. In The Netherlands the Huurcommissie is the natural route, and it has strict deadlines for challenging a huurverhoging: do not let them pass.