Portugal’s rental market has changed a lot over the past decade, and 2026 marks another year of adjustments. Whether you’re a student arriving for an Erasmus, a young professional moving to Lisbon or Porto, or simply renting a room from a private landlord, knowing what the law actually says protects you from the most common rental disputes — illegal rent hikes, missing deposits, surprise evictions and unregistered contracts.
This guide explains the key rules under Portugal’s Novo Regime do Arrendamento Urbano (NRAU) as they apply in 2026, in plain English, from the perspective of a tenant. It is not legal advice — for specific situations, consult a lawyer or a tenants’ association like Associação dos Inquilinos Lisbonenses.
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The legal framework: NRAU in 2026
Residential tenancies in Portugal are governed by the Novo Regime do Arrendamento Urbano (NRAU), originally established by Law 6/2006 and amended several times — most significantly by Law 31/2012, Laws 12/2019 and 13/2019, and the more recent Mais Habitação package and its subsequent partial reversals. The NRAU is complemented by the Portuguese Civil Code, which sets the foundational rules on lease contracts.
The framework is designed to balance landlord and tenant rights, with strong statutory protections for tenants — particularly around eviction, rent increases and contract termination.
What a valid residential lease must contain
Under the NRAU, all long-term residential lease agreements (the contrato de arrendamento) must be in writing. Verbal agreements are legally invalid. A valid contract must include:
- Identification of the parties: full name and NIF (Portuguese tax number) of both landlord and tenant.
- Property details: full address and unique tax registration number (artigo matricial).
- Purpose of the lease: typically permanent residence (habitação permanente); for students or temporary workers, it may be a temporary housing lease.
- Term: start and end dates, plus renewal terms.
- Rent amount and payment method and date.
- Deposit (caução) amount.
- Responsibility for utilities (electricity, water, gas, internet, condominium fees).
- Conditions for termination by either party.
Uniplaces insight: If a landlord refuses to put the agreement in writing, asks you to sign a verbal “”informal”” rental, or won’t share their NIF, treat it as a red flag. An unwritten lease leaves you with almost no legal protection — and means none of the tenant protections in this article apply to you.
Minimum lease duration and renewal
For residential permanent housing leases, the minimum duration is one year (Article 1095 of the Civil Code). Most contracts are signed for one year with automatic renewal, unless a different period is set by mutual agreement.
If the contract is for a fixed period (contrato de duração limitada), and neither party gives notice in time, it renews automatically. Short-term student leases (for example, six months) are possible but must be clearly stated as such in the contract; otherwise the longer renewal rules can apply.
Lease registration with Finanças (and the new tenant route)
Every long-term residential lease in Portugal must be registered with the tax authority (Finanças). This is the landlord’s obligation, and registration creates the legal record of the lease — without it, the landlord is also not declaring the rental income.
What changed in 2025: the Portaria n.º 106/2025/1 introduced a major shift. If the landlord fails to register the contract within the legal window (until the last day of the month following the start of the lease), the tenant can now register it themselves via the Portal das Finanças. This is a significant protection — registration is what unlocks tenant rights such as the IRS housing tax credit, visa documentation and access to social rental subsidies like Porta 65.
Uniplaces insight: If your landlord refuses to register the contract or keeps “”forgetting””, remember that you have the right to do it yourself from the day after their legal window closes. A registered contract is your evidence in any dispute and is often required for visa renewals (AIMA) and tax deductions.
Deposits (caução) and upfront payments
Portuguese law does not set a hard legal cap on the deposit, but market practice is one to two months’ rent. The deposit must be returned within around 30 days of the tenant moving out, provided there is no damage to the property or unpaid rent.
For students or tenants without a stable Portuguese income, two practices are very common:
- Fiador (guarantor): a person, usually with permanent income and Portuguese tax residency, who agrees to cover the rent if the tenant cannot. Many students rely on a parent or guardian.
- Adiantamento: several months’ rent paid in advance, often used when the tenant has no credit history in Portugal or no fiador.
When paying the deposit, always specify in writing that the payment is the caução, and keep a transfer record. Never pay in cash without a receipt.
Annual rent increases: the 2026 INE coefficient
Landlords cannot raise the rent on an ongoing contract whenever or by however much they like. Annual rent updates are governed by Article 1077 of the Civil Code and are capped by the coefficient published each year by INE (Instituto Nacional de EstatÃstica), based on the previous year’s CPI excluding housing.
For 2026, the official rent update coefficient is 2.24% (Aviso n.º 23174/2025/2). This means an existing contract’s rent can be increased by a maximum of 2.24% in 2026, and only once in twelve months. The landlord must give at least 30 days’ written notice before any increase takes effect.
This cap applies to existing contracts. The temporary cap on new contracts introduced under the Mais Habitação package has been partially reversed, so the rent on new contracts is freely set by market price — but once you’ve signed, the INE coefficient governs how it can rise.
Uniplaces insight: If your landlord tries to raise your rent above the INE coefficient mid-contract, or more than once a year, that’s not legal. Keep all communication in writing (carta registada for anything important) and contact a tenants’ association or lawyer before agreeing to anything.
What the landlord must do (and cannot do)
The landlord’s main legal obligations include:
- Delivering the property in a habitable condition.
- Carrying out structural repairs and maintaining major systems (plumbing, electricity).
- Issuing electronic rent receipts (recibo de renda eletrónico) via Finanças for each payment.
- Respecting the tenant’s right to peaceful enjoyment of the property — they cannot enter without permission or reasonable notice.
What landlords cannot do:
- Raise the rent more than once a year, or above the INE coefficient on existing contracts.
- Evict the tenant without legal grounds and formal written notice.
- Change the locks, cut electricity or water, or remove belongings to force a tenant out — these are illegal evictions and can lead to court action against the landlord.
- Enter the property without permission or reasonable notice.
- Withhold the deposit without justification.
How termination works
Termination by the tenant
Tenants can usually terminate the contract after the first third of the agreed duration has passed, with proper notice. For one-year contracts, this typically means a minimum notice period of around 60 to 120 days depending on the term, with written notice (often by registered letter, carta registada com aviso de receção). Open-ended contracts (contrato por duração indeterminada) generally require 120 days’ notice, but exact terms vary.
Termination by the landlord
The landlord can only terminate the contract for reasons specifically defined by law, including:
- Non-payment of rent (typically three or more months in arrears).
- Need of the property for the landlord’s own use or for a close family member, with the notice period the law requires.
- Major renovations that require the property to be vacated.
- Repeated breach of the contract by the tenant (illegal subletting, serious damage, etc.).
Evictions: only via legal process
Formal eviction in Portugal is a court-supervised legal process with strong safeguards for the tenant. The main routes are:
- Standard court proceedings.
- The Balcão Nacional do Arrendamento (BNA) — a special, faster eviction procedure for clear-cut cases like non-payment. If the tenant wants to oppose it, they may need to deposit the disputed rent (up to a maximum of six months’ worth) with the court.
In either case, the eviction must go through the legal system. A landlord who tries to remove a tenant by physical means, changing locks or cutting services is committing an illegal act and can face civil and criminal consequences.
Uniplaces insight: Vulnerable tenants — including those aged 65 or older, those with severe disabilities, and tenants under specific older protected contracts — benefit from additional safeguards in many eviction scenarios. If you fall into one of these categories, get specific legal advice before agreeing to vacate.
Practical tips for students and international tenants
- Get your NIF first. A Portuguese tax number is required to sign a lease and for most other admin. EU nationals can request one easily; non-EU residents may need a fiscal representative.
- Always demand a written, registered contract. Verbal agreements offer almost no protection. Verify the lease has been registered with Finanças — and if not, register it yourself once the landlord’s window closes.
- Pay by bank transfer, not cash. Reference each payment as renda or caução, and keep the transfer records.
- Insist on electronic rent receipts. The landlord must issue them via Finanças; if they refuse, the rental income isn’t being declared — a serious red flag.
- Document the property’s condition with dated photos and videos when you move in. Repeat at move-out to protect your deposit.
- Keep written records. All communication that matters legally should be in writing — ideally by carta registada com aviso de receção.
- Use IRS housing deductions. A properly registered contract entitles you to deduct rent on your IRS income tax return — up to €700 in 2025, €750 in 2026 and €800 in 2027.
Frequently asked questions
How much can the landlord raise my rent in 2026?
For existing contracts, the maximum legal rent increase in 2026 is 2.24%, set by the INE coefficient (Aviso n.º 23174/2025/2). The increase can only happen once per twelve months and requires at least 30 days’ written notice.
Do I need a fiador (guarantor) as a student?
Not legally, but in practice many landlords require one. A fiador needs permanent income and Portuguese tax residency. If you don’t have one, alternatives include paying several months’ rent in advance, putting down a larger deposit, or choosing platforms that don’t require a fiador.
What if the landlord doesn’t register my contract with Finanças?
Since the Portaria n.º 106/2025/1, tenants can register the lease themselves on the Portal das Finanças, from the day after the landlord’s legal registration window closes. Without registration, you can’t deduct rent on your IRS return, claim Porta 65 housing subsidies, or use the contract for AIMA visa procedures.
Can my landlord evict me without going to court?
No. All evictions must go through either the courts or the special National Lease Office (Balcão Nacional do Arrendamento) procedure. A landlord who changes the locks, cuts utilities or removes your belongings is committing an illegal eviction and can face legal consequences.
Is the minimum lease really one year?
For permanent residential housing, yes — the minimum legal duration is one year. Shorter contracts (six months for students, for example) are possible but must be explicitly stated as contrato de duração limitada; otherwise the renewal rules of a standard one-year lease may apply.
How long does the landlord have to return my deposit?
Typically within 30 days of move-out, provided there is no damage or unpaid rent. If the landlord delays without valid reason, you can pursue the deposit through the courts or via an arbitration centre (Centro de Arbitragem de Conflitos de Consumo).
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