Italy's New Short-Term Rental Law: What the CIN Code Means for Airbnb Owners (2026)

Since 2024, Italy has required every short-term rental property to carry a National Identification Code (Codice Identificativo Nazionale, or CIN), which must be displayed on every listing and posted physically at the property. It replaced a patchwork of regional codes with a single national system — and if you own or are buying an Italian property for short-term rental, getting this registration right is now a legal requirement, not a formality.

What the CIN actually is

The CIN is issued through Italy's national tourism ministry portal and is tied to the specific property, not to the owner or the platform. It must appear on listings on Airbnb, Booking.com, and any other channel, and typically on external signage at the property itself. Enforcement includes fines for hosts who list without displaying a valid code, and platforms have progressively been required to remove non-compliant listings.

Why this replaced the old regional CIR system

Before the CIN, several Italian regions (Lombardy, Lazio, and others) ran their own regional identification codes, which created confusion for owners with properties in different parts of the country and made enforcement inconsistent. The national CIN was designed to standardise this — but the transition period has meant some owners are still holding legacy regional codes that need to be converted or re-registered. If you are buying a property that was previously rented short-term, confirm whether the CIN registration is current and linked correctly to the property, not just to a code that existed under the old regional system.

Cedolare secca — Italy's flat tax on rental income

Separately from the CIN registration, rental income in Italy can often be taxed under cedolare secca, a flat withholding tax regime historically around 21% on gross rental income for most owners with up to a handful of properties, rising for additional properties under recent reforms. This flat rate is frequently more favourable than being taxed under Italy's progressive personal income tax bands (IRPEF), which is the alternative regime and can run considerably higher for owners with other taxable income. Whether cedolare secca applies, and at what rate, depends on the number of properties, how they are let, and current thresholds — this is genuinely one to confirm with an Italian accountant (commercialista) rather than assume from a general guide.

IMU — the annual property tax non-residents often miss

IMU (Imposta Municipale Unica) is Italy's annual municipal property tax, and unlike many countries' primary-residence exemptions, second homes and investment properties are generally liable for it — rates vary by municipality and cadastral value, and it is easy for a foreign owner to underestimate this recurring cost when modelling annual returns.

Local rules stack on top of the national law

The CIN is a national floor, not a ceiling. Individual municipalities — Venice, Florence, and several others — have layered additional local restrictions on top, including caps in historic centres, minimum stay requirements, or condominium-level restrictions on short-term letting written into building bylaws. A CIN registration does not override a building's own rules, and this is a common and expensive surprise for buyers of apartments in older Italian palazzi.

What to check before buying

1. Ask the seller or agent for the property's current, valid CIN — not a legacy regional code

2. Check the specific municipality's local STR rules, not just the national baseline

3. Check the building's own condominium bylaws for short-term rental restrictions, especially in older apartment buildings

4. Confirm with a commercialista whether cedolare secca applies to your situation and at what rate

5. Budget for IMU as a recurring annual cost, not an occasional surprise

Terrivio's regulatory data for Italian markets tracks CIN requirements and known municipal restrictions alongside the financial model, so the compliance picture and the yield picture sit on the same page — though for anything specific to your ownership structure, a local commercialista and legal advisor should always have the final word.