In Portugal, the permanent contract (contrato sem termo) is the default way to employ someone. A fixed-term contract (contrato a termo) is the exception: it needs a legitimate temporary reason, a written agreement and a fixed maximum duration. If you get any of those wrong, the law treats the employee as permanent. This guide shows how the two contracts differ, when each makes sense for a foreign employer, and where companies slip into a permanent hire by accident.
TL;DR
- A permanent contract is open-ended and gives the strongest protection against dismissal. A fixed-term contract must be justified by a temporary need such as covering an absence, seasonal work or a temporary increase in activity.
- Fixed-term contracts can run for up to two years and be renewed up to twice. Uncertain-term contracts can last up to four years.
- A fixed-term contract that breaks the legal or formal requirements is converted into a permanent one by operation of law.
- When a fixed-term contract simply expires, the employee is generally owed compensation of 18 days of base pay per complete year of service.
- If you have no Portuguese entity, an Employer of Record can issue either contract type compliantly on your behalf.
Table of Contents
- The core difference in one view
- When you can use a fixed-term contract
- Duration limits and renewals
- What happens when the rules are broken
- Probation, security and dismissal
- How each contract ends, and what it costs
- Which contract should you choose?
- Our perspective
- Hiring without a Portuguese entity
- Mistakes to avoid
- FAQ
- Sources
The core difference in one view
The Portugal Brief puts the distinction plainly: a fixed-term contract is a temporary, justified arrangement with a defined end date, while a permanent contract is the default, indefinite agreement with higher stability and protection against dismissal. The same source stresses that rights, notice periods and severance all flow from the type of contract signed, so the choice is never only administrative.
Portugal’s Constitutional Court has described permanent employment as the form that best guarantees job security. That is the legal philosophy behind everything below: the law lets you use temporary contracts, but only inside a tight frame.
| Point | Permanent (sem termo) | Fixed-term (a termo certo) |
|---|---|---|
| Default or exception | Default | Exception, needs a justification |
| End date | None | Stated in the contract |
| Maximum duration | Not applicable | Up to 2 years, renewable up to twice |
| Form | No special form required for validity | Must be in writing, with the reason for the term |
| Ending | Needs a lawful ground, or agreement | Expires at term, usually with compensation |
| Risk if mishandled | Low | Conversion to permanent |
When you can use a fixed-term contract
According to the official gov.pt guide to working in Portugal, fixed-term contracts are used for temporary situations: replacing absent workers, seasonal work, or an exceptional increase in activity. The key word is temporary. The need must be real and must be explained in the contract itself.
Typical legitimate cases for an international company:
- Covering leave. A team member in Lisbon is on extended parental or sick leave and you need someone in the seat until they return.
- A defined project. A product launch, a migration or a market test with a clear scope and end.
- A seasonal peak. A support or sales team that grows for a few months each year.
What does not qualify is a permanent role you would simply prefer to keep flexible. Commentators note that using fixed-term contracts to cover permanent needs leads to automatic conversion into a permanent contract.
What the written contract must contain
The employer has to provide the parties’ identification, the worker’s functions and remuneration, the start date and the foreseeable duration of a fixed-term contract, as the gov.pt guide sets out. A practitioner overview adds that while most labour contracts need no specific form to be valid, fixed-term and uncertain-term contracts must be in writing.
The most common drafting failure is the justification. Under Article 141 of the Labour Code, leaving out the required justification for the term is a grave infraction. A vague line such as “temporary business needs” is the sort of wording that gets challenged. Name the absent employee, the project or the seasonal peak, and tie it to dates.
Duration limits and renewals
The rules on length are where foreign employers most often go wrong, because they count one contract at a time while the law counts the whole history.
- Fixed-term (termo certo): up to two years, and renewable up to twice, provided the renewal does not exceed one year and the original temporary need still exists, per gov.pt.
- Uncertain-term (termo incerto): used when the end depends on an event, such as a colleague’s return. It can last up to four years, according to the same guide.
According to a practical guide by Portuguese professionals, the two-year limit also takes into account earlier fixed-term or temporary-work contracts for the same job, and service contracts for the same purpose, with the same employer or related companies. So you cannot reset the clock by switching the paper form, by using a temp agency for the same seat, or by moving the person to a sister company.
A worked example
Suppose you hire a customer success specialist on a 12-month fixed-term contract to cover a maternity leave. The leave extends, so you renew for another year. A third renewal would be a problem: you have already used the two-year allowance and, in any case, the renewals are capped. If you need the person beyond that point, the lawful route is a permanent contract, not a creative workaround.
Keep a simple log for every role: start date, each renewal, the stated reason, and any earlier contract the same person had with your group. That log is your best protection in a dispute.
What happens when the rules are broken
The sanction is blunt. If a fixed-term contract fails the substantive or formal requirements, it is converted into a permanent contract by operation of law (Article 147 of the Labour Code). No court order is needed for the conversion to apply.
In practice this means:
- A missing written agreement or missing justification can make the employee permanent from the start.
- Exceeding the two-year or renewal limits turns the relationship into a permanent one.
- Ending the “fixed-term” relationship afterwards is then treated as a dismissal of a permanent employee, with all the protections that follow.
We cover this trap in more depth in our article on how to avoid accidental permanent hires under the two-year contract cap.
Probation, security and dismissal
Both contract types usually start with a probation period, and it matters. The Portugal Brief notes that once probation ends, terminating an employee becomes significantly harder, which is why you should treat that window as a real evaluation phase and not a formality. Probation lengths differ by contract type and duration, so confirm the current figures in the Labour Code or with your payroll and legal adviser before you draft.
After probation, a permanent employee can only be dismissed on lawful grounds. Eurofound reports that dismissal without just cause, or for political or ideological reasons, is strictly forbidden in Portugal. A fixed-term employee is protected too, but the relationship has a built-in end, which is exactly what makes it attractive to employers and exactly why the law polices it.
How each contract ends, and what it costs
Fixed-term expiry
When a fixed-term contract simply runs out, the employee is generally entitled to compensation. Lexology’s termination summary gives the formula as 18 days of base remuneration plus seniority premiums per complete year of service. That summary dates from 2021, and compensation rules for expiry have been adjusted by lawmakers over time, so a 2023 legal update on higher compensation for fixed-term and uncertain-term contracts is worth reviewing with your adviser before you budget for a specific exit. Compensation is not due if the employee has retired or turned 70, per the same summary.
Budget for this at the start. A 12-month contract is not free to end, and the cost belongs in your comparison with a permanent hire.
Permanent contracts
A permanent contract can end by resignation, by mutual agreement, by collective dismissal, or by dismissal on lawful grounds. The mutual-agreement route (revogação por mútuo acordo) lets the parties negotiate terms and severance, and, according to the Portugal Brief, can preserve unemployment benefit eligibility if structured correctly. Structure it with local advice, because the details decide the outcome for the employee.
Which contract should you choose?
Use these questions in order.
- Is the need genuinely temporary? If you cannot name the absent colleague, project or seasonal peak, a fixed-term contract is the wrong tool.
- Is it a core role you expect to keep beyond two years? Go permanent from day one. It also helps with retention, since candidates in Portugal generally prefer stable contracts.
- Are you testing the market? A fixed-term contract may fit a defined pilot, but only if the pilot has a real scope and end. Otherwise use a permanent contract with a well-run probation period, or an EOR arrangement that lets you test without opening an entity.
- Have you counted the history? Check earlier contracts, agency placements and group companies for the same position.
- Have you priced the exit? Compare expiry compensation on a fixed-term contract against the cost of a permanent hire you might later part with.
Our perspective
Most of the problems we see with foreign employers are not about choosing the wrong contract. They come from treating Portuguese contracts like those in the company’s home country. Teams used to at-will employment assume a short fixed-term deal is a softer way to hire. In Portugal it is the stricter one, because the law demands a reason, a record and a limit, and punishes the lack of any of them with conversion.
Our advice is simple. For roles you intend to keep, sign a permanent contract and use the probation period properly. For genuine cover or project work, use a fixed-term contract and write the justification as if a labour inspector will read it. And keep one person responsible for the contract history of every role.
Our team specialises in Portuguese employment law and compliance, so these checks are part of our daily work, not an afterthought.
— Paulo
Hiring without a Portuguese entity
If your company has no Portuguese entity, you still need a compliant contract. With an Employer of Record, the EOR becomes the legal employer, issues the Portuguese contract, runs payroll and handles the filings, while your team directs the daily work. We run this model through our Employer of Record service in Portugal, covering contract drafting, onboarding, payroll and compliance, so the fixed-term or permanent choice is documented correctly from the first day.
If you later decide to hire at scale, you can move to your own entity. Our guide to EOR versus entity setup explains when that switch makes sense, and our overview of employment contract types in Portugal covers the other forms you may meet.
Mistakes to avoid
- Vague justification. Write the concrete reason, the person replaced or the project, and the dates.
- Verbal extensions. Renewals should be documented in writing and within the allowed limits.
- Switching labels. Moving someone from a fixed-term contract to an agency or a service agreement for the same work does not stop the clock.
- Ignoring group history. Related companies count toward the two-year limit.
- Forgetting expiry costs. Include compensation in the budget for every fixed-term hire.
- Using the contract to avoid commitment. If the need is permanent, the law will treat the job as permanent.
For a wider checklist, see our employment compliance in Portugal checklist and our guide to legal compliance in employment outsourcing.
FAQ
Can a fixed-term contract be renewed indefinitely in Portugal?
No. A fixed-term contract can last up to two years and be renewed up to twice, as long as the original temporary need remains, according to gov.pt. Beyond the limits, the relationship is treated as permanent.
Does a fixed-term contract have to be in writing?
Yes. Most labour contracts do not need a specific form to be valid, but fixed-term and uncertain-term contracts must be written and must state the reason for the term. Missing this can convert the contract into a permanent one.
Is severance due when a fixed-term contract ends?
Usually yes. The expiry compensation is commonly summarised as 18 days of base remuneration plus seniority premiums per complete year of service, according to Lexology. It is not due if the employee has retired or turned 70. Check the current figure with a Portuguese adviser before you rely on it.
What is an uncertain-term contract?
It is a temporary contract whose end depends on an event, such as a colleague returning from leave, rather than on a calendar date. It can last up to four years, per the official gov.pt guide.
Can a foreign company issue these contracts without a local entity?
Not directly. You need a Portuguese legal employer, either your own entity or an Employer of Record that signs the contract and carries the compliance duties for you.
Sources
- gov.pt: Working in Portugal guide
- The Portugal Brief: Understanding your Portuguese employment contract and payslip
- OCC: O contrato de trabalho a termo (practical guide)
- Labour Code, Article 141
- Lexology: At a glance, termination of employment in Portugal
- Eurofound: Individual employment relations in Portugal
- Tribunal Constitucional ruling, Diário da República
- Labour law overview, IBC Madeira
- Portugal employment contracts and labor law