Fixed-Term vs Open-Ended Leases in Portugal: Which Should You Choose?

When drafting a rental contract in Portugal, one of the first decisions both parties must make is whether the lease will be fixed-term (prazo certo) or open-ended (duração indeterminada). This isn't just a formality — it fundamentally changes how long the lease lasts, how it can be renewed, and how either party can end it.

Portuguese law treats these two types of contracts very differently, and the choice has real consequences for both landlords and tenants. Here's a clear comparison to help you decide.

The Key Differences at a Glance#

Feature	Fixed-Term (Prazo Certo)	Open-Ended (Duração Indeterminada)
Duration	1–30 years (set by the parties)	No end date
Renewal	Statutory default applies unless a valid contrary clause, opposition, or exception changes it	Continuous until terminated
Landlord ends lease	By opposing renewal or using another applicable statutory route	Through the statutory routes in Arts. 1101–1104 or a separate breach-resolution route
Tenant ends lease	By opposing renewal or early termination	With notice
Minimum period	1 year for permanent housing	None
Tenant protection	Moderate	Strongest
Flexibility for landlord	More predictable	Less control over duration

Fixed-Term Leases (Prazo Certo)#

Duration Rules#

Under the NRAU:

• Minimum: 1 year for permanent residential leases (since Lei 13/2019)
• Maximum: 30 years
• Default: If a residential lease does not specify whether it is fixed-term or open-ended, Art. 1094.º n.º 3 treats it as fixed-term for 5 years
• Renewal: Unless a valid contrary clause or statutory exception applies, fixed-term leases renew automatically at the end of the term unless either party provides proper opposition notice

How Renewal Works#

Unless a valid contrary clause or statutory exception applies, Art. 1096.º of the Civil Code defaults renewal to successive periods equal to the initial term — or 3 years where the initial term is shorter. This is a supplementary rule, so the signed renewal wording must be checked before calculating dates.

Example: A 3-year lease renews for 3-year periods. A 1-year or 2-year lease also renews for 3-year periods by default — Art. 1096.º renews for the initial term, or 3 years when that term is shorter, unless the contract stipulates otherwise.

Landlord Opposition to Renewal#

To prevent renewal, the landlord must provide written notice before the term ends. For a complete breakdown of all notice periods (landlord and tenant), see our Notice Period Rules Guide.

Contract Duration	Landlord Notice Period
≥ 6 years	240 days
≥ 1 year and < 6 years	120 days
≥ 6 months and < 1 year	60 days
< 6 months	1/3 of the term

Tenant Opposition to Renewal#

Tenants can oppose renewal with the following notice periods:

Contract Duration	Tenant Notice Period
≥ 6 years	120 days
≥ 1 year and < 6 years	90 days
≥ 6 months and < 1 year	60 days
< 6 months	1/3 of the term

Tenant Early Termination#

Under Article 1098(3) of the Civil Code, after one-third of the initial term or current renewal has elapsed, the tenant can terminate early with the notice periods below. For the full legal rules, examples, and common mistakes, see our Tenant Early Termination Guide.

Contract Duration	Notice for Early Termination
≥ 1 year	120 days
< 1 year	60 days

Example: In a 3-year lease, the tenant can terminate after 1 year has passed, by giving 120 days' notice.

Open-Ended Leases (Duração Indeterminada)#

How They Work#

An open-ended lease has no fixed end date. It continues indefinitely until one of the parties takes action to end it. This type offers the strongest tenant protection but gives landlords the least flexibility.

Tenant Termination#

Under Article 1100 of the Civil Code, the tenant must first complete six months of effective duration. After that gate, the tenant can terminate with notice based on the lease's effective duration when the notice is sent:

Effective Duration at Communication	Notice Required
1 year or more	120 days
Less than 1 year	60 days

Article 1100 also provides a 30-day route after the landlord sends the five-year advance notice under Art. 1101(c). The termination takes effect at the end of a Gregorian calendar month, and insufficient notice is handled through the adapted Art. 1098(6) rule.

Landlord Termination#

This is where open-ended leases differ most from fixed-term contracts. The landlord cannot use the fixed-term opposition table to end an open-ended lease. Articles 1101–1104 provide separate statutory routes, including:

1. Housing need for the landlord or a first-degree descendant
2. Demolition or qualifying works that require the property to be vacant
3. At least five years' advance notice under Art. 1101(c)

Which Should You Choose?#

For Landlords#

If You…	Choose
Want predictable lease duration	Fixed-term
Plan to sell the property eventually	Fixed-term
Want maximum rental income stability	Open-ended (less turnover)
Have a long-term investment horizon	Either works
Might need the property back	Fixed-term (easier to recover)

For Tenants#

If You…	Choose
Want maximum stability and protection	Open-ended
Are new to Portugal and exploring	Fixed-term (1 year)
Have a permanent job and plan to stay	Open-ended
Are a student or temporary resident	Fixed-term
Want flexibility to move	Fixed-term (early termination after 1/3)

Tax Benefits of Longer Contracts#

Lei 56/2023 (Mais Habitação) sets reduced IRS rates under Art. 72.º for long-duration contracts let as the tenant's permanent home. They apply to contracts celebrated or renewed on or after 7 October 2023 (Art. 50.º n.º 7):

Effective Duration	IRS Rate
Under 5 years	25% (no reduction)
5 to 10 years	15% (−10 pp)
10 to 20 years	10% (−15 pp)
20 years or more, or duração habitacional definitiva (DHD)	5% (−20 pp)

These bands are not automatic. For contracts entered into from 1 January 2024, Article 72(23)'s rent-ceiling test can disapply them. From 1 September 2026, that test points to a replacement table that remains unresolved. Confirm the contract's eligibility with your accountant before relying on a reduced rate. In the 5-to-10-year band, renewal reductions also require a fact-specific check.

Can You Switch Between Types?#

Yes, but it requires mutual agreement:

• A fixed-term contract can be converted to open-ended if both parties agree (usually by removing the duration clause)
• An open-ended contract can be converted to fixed-term with a new agreement specifying the duration

This is typically done through a contract amendment (aditamento), which may require a separate communication to Finanças under the applicable rules. See our Finanças registration guide.

Common Misunderstandings#

"My 1-year lease ends automatically after 1 year"#

Incomplete. Unless a valid contrary clause or statutory exception applies, fixed-term leases follow the Art. 1096 renewal default unless a party makes a valid opposition. Read the signed renewal clause before calculating the end date.

"The landlord can end my lease whenever they want"#

Wrong. For fixed-term contracts, the landlord must respect the notice bands and the delayed first-renewal effect in Art. 1097(3), subject to its exception and the signed clause. Open-ended leases use separate termination routes.

"Open-ended means I have less security because there's no end date"#

Wrong. Open-ended leases provide the strongest tenant protection. The absence of an end date means the landlord has very limited options to end the tenancy.

"I can't leave a fixed-term lease early"#

Partially wrong. After one-third of the initial term or current renewal has elapsed, you can terminate with 120 days' notice (for a term ≥ 1 year) or 60 days (for a shorter term), under Article 1098(3) of the Civil Code.

Frequently Asked Questions#

Get the Right Lease Type for Your Situation#

Whether you choose fixed-term or open-ended, the contract should state the duration, notice periods, renewal mechanism, and the legal references that support them.

Want to understand how annual rent increases affect each lease type? See our guide on Annual Rent Increase Rules. Duration's tax dimension is Art. 72.º CIRS: the reductions above only start at 5 years. The separate Art. 45.º-C EBF regime can cap qualifying tax at no more than 10% and has no minimum term — it turns on the rent level and other conditions: the property must be let exclusively for residential purposes, the monthly rent must be no more than €2,300 (2026), and the income must be received on or before 31 December 2029. A more favourable valid Art. 72.º treatment prevails. If you're considering a very short arrangement, compare the short-term vs long-term lease differences. Landlords ending a fixed-term lease should also review the rules around opposing renewal.

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