Rent Adjustment for Tenants in Poland

Rent – increases, CPI indexation, reductions 3 min read · published September 11, 2025
As a tenant in Poland you may encounter rent adjustment — a process that allows the landlord to raise rates under certain conditions. This practical guide explains how often and on what basis indexation or increases can occur, what rights you have and what steps to take if you believe an increase is unjustified. You will learn which lease clauses matter, when the landlord must notify you and what evidence to gather before a potential dispute. The information is based on Polish laws and court practice, so it is useful for real tenancy matters. At the end you will find a checklist, a template letter to the landlord and tips on where to seek help from offices and courts.

How rent adjustment works

Rent adjustment is a mechanism for increasing the rent in response to inflation or other contractual conditions. In practice this may mean automatic indexation according to the CPI, agreed percentage increases or negotiations between the parties. It is important to check the lease terms: they often specify the frequency and the calculation method for increases.

Check the lease provisions on indexation and notification deadlines carefully.

Main factors influencing adjustment frequency

  • Indexation according to the CPI or other economic indicator.
  • Provisions in the lease agreement, including duration and change mechanisms.
  • Billing periods and notification deadlines required by the contract or market practice.
  • Market conditions and local rate negotiations.

When the landlord can raise rent

The landlord can raise rent if the lease allows it or after an individual agreement with the tenant. For fixed-term leases, changes are limited by the contract. For indefinite leases there are often shorter notice periods and specific adjustment rules. In disputes, check the legal basis in applicable acts and case law.[1]

Always respond to written notice of a rent increase within the deadline.

CPI indexation and the lease

If the lease refers to CPI as the basis for indexation, the mechanism usually describes the percentage conversion. If the lease does not include such a clause, an increase should result from mutual agreement or a court decision in a tenant-landlord dispute.[2]

What you can do as a tenant

If you receive a notice of increase, act quickly: check the lease, calculate the proposed change and collect documents proving current rent and payment dates. If you believe the increase is unjustified, start with negotiations in writing, and if that fails — consider legal help or court action.

Documentation (bills, correspondence, photos) increases the chance of a favorable outcome.

Frequently asked questions

How often can the landlord adjust rent?
It depends on the lease and agreements between parties; annual CPI indexations or agreed percentage changes are common.
Does the landlord have to notify the tenant in writing?
Yes, written notification is recommended and should state the legal or contractual basis for the increase.
What to do if I consider the increase unjustified?
Attempt negotiation, submit a written complaint, gather evidence and if necessary bring the case to the district court (civil division).

How to — step by step

  1. Check the lease and notice or indexation deadlines stated in the documents.
  2. Send the landlord a letter asking for clarification of the basis for the increase and propose mediation.
  3. Collect evidence: bills, payment confirmations, correspondence and photos of the property condition.
  4. If negotiations fail, consider filing a claim in the district court (civil division) or seeking legal assistance.

Key takeaways

  • Check your lease: its clauses determine how often rent can be adjusted.
  • Act promptly and in writing when you receive a notice of increase.
  • Gather evidence and use court or legal help if negotiations fail.

Help and Support / Resources

  1. [1] ISAP: Act on the Protection of Tenants' Rights
  2. [2] ISAP: Civil Code (lease provisions)

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Bob Jones
Bob Jones

Editor & Researcher, Tenant Rights Poland

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

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