Check Rent Increase for Tenants in Italy

If you are a tenant in Italy and received a notice of rent increase, it is normal to feel unsure. This guide explains in practical terms how to verify whether the increase is legitimate: check the renewal clause in the contract and the ISTAT adjustment, request the documentation showing the calculation and verify any territorial agreements or applied indices. You will find concrete steps to calculate the increase, request the RLI form or evidence from the landlord, and understand when to consult a professional or the Court. The instructions are aimed at non-expert tenants and refer to current legislation in Italy. You will also find practical examples and tips on how to document communications.

What to check

When the landlord notifies an increase, first check the contract: many leases specify how the ISTAT update is applied or whether territorial agreements with attestation apply. Rental law is governed by Law 431/1998 and the Civil Code;^[1] keep proof of any written communication.

• Copy of the registered contract and the update clause^[2]
• Calculations or tables used to apply the ISTAT index
• Any territorial agreements or attached attestations

How to check the ISTAT calculation

The most common method is based on the contractual clause referring to a specific ISTAT index and a calculation formula. Ask the landlord for the reference table, the periodicity and the ISTAT value applied for the indicated period; if the contract refers to a territorial agreement, ask for the attestation. If needed, reproduce the calculation by comparing values published by ISTAT.

• Request the formula and the values used for the calculation
• Verify the reference dates and the indicated periodicity

When to dispute

If the landlord does not provide the documentation or the calculation appears incorrect, send a written request by registered mail or PEC and keep receipts. If you receive no answer, consider mediation or legal action at the competent Court; often the first step is a formal request for clarification to the lessor.

FAQ

How can I verify if the rent increase is legitimate?

Check the renewal clause in the contract, request the ISTAT calculation and the documentation; if there is no proof you can formally dispute it with the landlord.

Do I have to pay the increase before disputing it?

It is advisable to pay the agreed or undisputed portion to avoid arrears, separating the contested part and notifying your objection in writing.

Where can I find the RLI form to verify registration?

The RLI form and instructions are available on the Agenzia delle Entrate website; contract registration is the official evidence of the agreement.

How to

1. Request from the landlord a copy of the registered contract and the rent calculation
2. Reproduce the ISTAT calculation using published values and compare the figures
3. Send a formal written request (registered mail/PEC) if data are not provided
4. If necessary, consult a lawyer or the Court to dispute the increase

Key takeaways

• Always check the contractual clause before accepting an increase.
• Request written documents and precise calculations from the landlord.
• If you receive no response, send a formal request and consider legal assistance.

Help and resources

• RLI form (form) - Agenzia delle Entrate
• Registration instructions - Agenzia delle Entrate
• Law 431/1998 text - Normattiva

---

1. [1] Normattiva - Law 431/1998
2. [2] Agenzia delle Entrate - RLI form and instructions