Obligations Required in a Residential Lease Agreement in Portugal

Residential lease agreements in Portugal are primarily governed by the New Urban Lease Regime (NRAU, Law No. 6/2006), which came into force on 27 June 2006, as substantially amended by the Mais Habitação package (Law No. 56/2023), effective 7 October 2023. The fundamental requirement is that all urban leases must be in writing. This is not a recommendation — it is a mandatory statutory rule.

1. Written Form is Mandatory (Art. 1069 CC)

Article 1069 of the Civil Code establishes unambiguously: all urban lease agreements must be concluded in writing. An oral agreement — however long-standing and clearly understood by both parties — does not constitute a valid lease in Portugal.

Consequences for landlords who provide no written lease:

• The landlord loses the ability to enforce the agreement in court.
• Specific penalties apply under Portuguese law for failure to provide written form.
• The landlord's failure to register may be bypassed by the tenant using the CLS system (Portaria 190/2025).

Law 13/2019 — Tenant Protection for Oral Leases: Under Law No. 13/2019, a tenant who has occupied a property for 6 months or more can prove the existence of a lease even without a written contract (e.g., through rent payment records, utility registrations, or witness testimony), provided the lack of a written contract is not the tenant's fault. Once proved, the landlord becomes bound to the statutory terms of the NRAU. Furthermore, since August 2025 (Portaria 190/2025), tenants can register the lease with the Tax Authority via the CLS (Comunicação do Locatário) system if the landlord fails to do so.

2. Security Deposit and Advance Rent Limits (Art. 1076 CC)

Art. 1076 of the Civil Code (as amended by Law 24-D/2022 and maintained under Law 56/2023) establishes specific caps on the financial obligations required at the start of a residential tenancy:

• Security Deposit (Caução): Maximum 2 months' rent.
• Advance Rent (Antecipação de Rendas): Maximum 2 months' rent, provided there is a written agreement.
• Combined, the maximum upfront financial requirement (excluding the first month's rent) is 4 months' rent (2 months deposit + 2 months advance rent).

Any requirement exceeding these limits is unlawful and exposes the landlord to regulatory penalties.

3. Tax Registration: Modelo 2 and Stamp Duty

All residential leases must be registered with the Tax Authority:

• Modelo 2 Declaration must be filed by the landlord by the end of the calendar month following the start (início) of the lease.
• Stamp Duty (Imposto do Selo): 10% of the monthly rent value is due by the end of the month following the start date of the lease, after the Tax Authority issues the payment note (Art. 60-A & 40 of the Stamp Duty Code).
• IRS Rates and Tax Benefits: Rental income is subject to a standard 25% flat rate (Law 56/2023). However, under the Construir Portugal programme, a reduced 10% IRS rate applies to residential leases with 'moderate rents' (capped at €2,300/month for 2026) for contracts with a minimum duration of 3 years.

4. Minimum Lease Duration

Under Art. 1094 and 1097 of the Civil Code, residential leases have a mandatory minimum duration of 1 year. Furthermore, under Art. 1097(3), a landlord's opposition to the first renewal only takes effect 3 years after the contract's commencement, effectively guaranteeing the tenant a 3-year minimum stay unless specific statutory exceptions (e.g., personal use) apply.

Back to Portugal Landlord-Tenant Laws OverviewPreview unavailable.