Fixed-term contract limits – 33-month rule

A mid-sized IT company in Warsaw hires a developer on a fixed-term contract, renews it twice over three years, and assumes a fourth renewal is perfectly lawful. Then the National Labour Inspectorate (Państwowa Inspekcja Pracy, PIP) audits the arrangement. The inspectors conclude that the employment relationship converted to an indefinite contract by operation of law – months earlier. Back-pay claims, reinstatement risk, and an employment dispute follow.

Polish labour law sets a hard ceiling on fixed-term employment: no employer may keep one employee on successive fixed-term contracts for more than 33 months in total, and the number of such contracts may not exceed three. Either limit, once breached, converts the arrangement automatically into an indefinite-term contract. The rule applies to all employers in Poland regardless of the employee's nationality or the employer's country of incorporation.

This page explains how the 33-month rule works in practice, which exemptions exist, what happens when limits are exceeded, and how foreign investors structuring their Polish workforce can stay compliant from day one. The discussion follows the structure: regulatory framework → instruments and exemptions → pitfalls → cross-border considerations → self-assessment checklist.

What does the 33-month rule actually prohibit?

Polish employment legislation caps fixed-term employment at 33 months of cumulative duration and three contracts with the same employer. Both limits operate independently. An employer who signs four contracts each lasting only six months breaches the three-contract ceiling even though the total duration is 24 months. An employer who signs two contracts totalling 34 months breaches the duration ceiling even though only two contracts exist. Either breach converts the relationship into an indefinite contract – automatically, from the day the limit was crossed.

The National Court Register (Krajowy Rejestr Sądowy, KRS) records the employer's legal identity, and it is the legal employer – not a staffing intermediary – who is bound by the ceiling. The counting starts from the first day of the first fixed-term contract concluded after the rules entered force. Gaps between contracts do not reset the clock unless the break exceeds one month, and even then the National Labour Inspectorate (PIP) scrutinises whether the gap was genuine or manufactured to circumvent the rule.

One practical implication is worth stating plainly. The conversion is not discretionary. No court order is needed. The employee does not need to file a claim for the conversion to occur. The indefinite status attaches by law, and the employer who later dismisses the employee without the procedural protections applicable to indefinite contracts – including the requirement to consult trade unions and provide substantive grounds for termination – faces an unfair dismissal claim.

Duration limit: 33 months cumulative across all fixed-term contracts with one employer
Number limit: maximum three fixed-term contracts in sequence
Either limit triggers automatic conversion to indefinite employment
A gap of one month or less between contracts does not reset either counter
The PIP may reclassify arrangements structured to evade the rule

The Social Insurance Institution (Zakład Ubezpieczeń Społecznych, ZUS) also takes an interest. Indefinite contracts carry different termination-notice obligations, and incorrect classification affects the calculation of severance pay under the collective redundancy framework. Employers who discover a conversion after the fact face exposure on multiple fronts simultaneously.

Which contracts and situations fall outside the ceiling?

Polish labour law carves out several categories of fixed-term employment from the 33-month rule. Understanding these exemptions is the first step in building a compliant flexible workforce. The exemptions are exhaustive – if a contract does not fit one of the listed categories, the ceiling applies in full.

The most commercially significant exemption covers contracts concluded to replace an absent employee (typically maternity or sick leave). Such a replacement contract may run for as long as the underlying absence lasts, without counting toward the 33-month total. A second exemption applies to contracts for work of a seasonal or intermittent nature, provided the employer notifies the relevant district labour office (Okręgowy Urząd Pracy) within five working days of signing the contract. The notification is a condition of the exemption – missing it by even one day reactivates the ceiling.

We secured a reclassification challenge for a manufacturing client in the Mazowieckie region (autumn 2025). The employer had relied on the seasonal exemption for a series of rolling six-month contracts but had failed to notify the district labour office on two occasions. We restructured the documentation and negotiated a compliant transition to indefinite contracts for eight workers, avoiding litigation exposure estimated above PLN 400,000.

A third exemption – frequently overlooked – applies where the employer and employee agree in writing that the fixed-term contract serves an objective purpose justifying its use. This is not a blank cheque. The objective purpose must be genuine, documented, and capable of surviving PIP scrutiny. Vague references to "project-based work" without a defined deliverable and end date will not suffice. A fourth exemption covers contracts concluded with employees performing managerial functions at the employer's subsidiary registered in the National Court Register, subject to a board resolution.

For employers holding a work permit Poland arrangement for foreign nationals, the exemption framework intersects with immigration law. A fixed-term contract tied to a work permit validity period does not automatically fall outside the 33-month ceiling. The permit duration and the employment ceiling are governed by separate legal regimes and must be tracked in parallel.

What are the practical pitfalls employers miss?

Most compliance failures do not arise from deliberate evasion. They arise from administrative drift – HR systems that do not flag approaching limits, line managers who renew contracts without legal review, and group structures where the employing entity changes but the work continues uninterrupted. Each of these scenarios deserves specific attention.

The most common trap is the informal extension. An employer and employee agree verbally to continue working after a fixed-term contract expires. Under Polish labour law, continued performance after expiry without a new written agreement converts the contract to an indefinite one by a separate route – independent of the 33-month rule. The employer then faces a double exposure: possible conversion under the duration ceiling and certain conversion under the continued-performance rule.

Our team obtained interim relief for a German investor's subsidiary in Lower Silesia (spring 2026). The parent company had transferred an employee between two Polish subsidiaries, treating each employment period as independent. The PIP took the position that the two entities formed a single employer for the purposes of the fixed-term ceiling because they shared the same economic purpose. We challenged the reclassification and secured a six-month deferral of enforcement, allowing the group to restructure its Polish employment arrangements.

Group structures deserve particular caution. Where a Polish operating company and its parent or sister entity share management, premises, or payroll administration, the PIP may argue that successive contracts with different legal entities should be aggregated. The risk is heightened where the employee's role, remuneration, and reporting line remain unchanged across the entity transition. An A1 certificate framework for posted workers involves similar aggregation questions when employees move between group entities across borders.

A third pitfall concerns the whistleblower protection framework. Since the ustawa o ochronie sygnalistów (Whistleblower Protection Act) entered force, employees who report suspected breaches of the fixed-term ceiling enjoy enhanced protection against dismissal. An employer who terminates a fixed-term contract shortly after an employee raises a compliance concern faces a presumption of retaliatory dismissal. The burden of proof shifts to the employer. This dynamic significantly raises the cost of non-compliance.

How does the rule affect foreign investors and cross-border structures?

Foreign companies entering the Polish market frequently underestimate how quickly the 33-month clock starts running. An investor who seconds an employee from a German parent to a Polish subsidiary under a simultaneous local employment contract may find that the local contract counts from day one – even if the employee's primary legal relationship is with the foreign entity. The Polish employment contract is governed by Polish law regardless of any choice-of-law clause favouring a foreign system.

The EU Blue Card regime adds a further layer. A highly skilled non-EU national holding an EU Blue Card issued in Poland must hold a valid work authorisation tied to a specific employer. If the underlying employment contract converts to an indefinite contract by operation of the 33-month rule, the employer must notify the Voivode (regional governor) within 15 working days. Failure to notify is a separate administrative offence carrying a fine of up to PLN 10,000. The immigration and employment compliance obligations are linked but tracked separately.

Cross-border postings also interact with the ceiling. An employee posted to Poland from Luxembourg or the United Kingdom under an A1 certificate retains their home-country social security affiliation, but the Polish fixed-term employment rules still govern the local contract. Employers structuring these arrangements should review both the A1 certificate requirements for UK-posted workers and the fixed-term ceiling simultaneously.

Three business scenarios illustrate the cross-border dimension. A manufacturing investor establishing a greenfield plant in Silesia typically needs a 24-month ramp-up period. A single 24-month fixed-term contract leaves nine months of ceiling headroom for one further contract. An IT company with a nearshore team in Kraków cycling through project-based roles may exhaust the three-contract ceiling before the 33-month duration limit becomes relevant. A financial services firm relocating EU Blue Card holders from Frankfurt to Warsaw must coordinate permit validity with employment contract duration to avoid inadvertent conversion.

Self-assessment checklist – what to review now

Employers who have not audited their fixed-term arrangements in the past 12 months carry meaningful exposure. The checklist below identifies the minimum review steps. Each item represents a separate compliance risk if left unaddressed.

Map every fixed-term contract in force and calculate cumulative duration per employee from the first contract date
Count the number of consecutive fixed-term contracts per employee and flag any employee at two or more
Verify that each claimed exemption (replacement, seasonal, objective purpose) is documented and, where required, notified to the district labour office within five working days
Review group structures to identify any employee who has worked for affiliated entities without a genuine break exceeding one month
Confirm that EU Blue Card and work permit validity periods are tracked separately from the fixed-term contract ceiling

Employers who identify a potential conversion should act promptly. The indefinite contract status cannot be reversed unilaterally. Once the conversion has occurred, the employee is entitled to the full termination protections applicable to indefinite employment, including notice periods of up to three months and the obligation to provide written reasons for dismissal. Restructuring an employment relationship after conversion requires the same procedural steps as terminating any indefinite contract – and carries the same litigation risk if those steps are not followed correctly.

For companies with 50 or more employees, the employment lawyer Warsaw consideration extends to collective agreement obligations. Where a collective agreement governs the workforce, the agreement may impose additional constraints on the use of fixed-term contracts beyond the statutory ceiling. Any audit must check both the statutory framework and any applicable collective agreement provisions.

Foreign investors should also note that real estate tax classification disputes – increasingly common in 2025 – sometimes surface employment misclassification as a collateral issue. See our analysis of real estate tax reclassification disputes in 2025 for context on how regulatory audits in one area can trigger cross-disciplinary review.

Frequently asked questions

Q: Does a one-month break between contracts genuinely reset the 33-month counter?

A: A break of more than one month between successive fixed-term contracts with the same employer prevents the contracts from being treated as "consecutive" under Polish labour law. However, the National Labour Inspectorate scrutinises whether such breaks reflect a genuine interruption of the employment relationship or were engineered solely to reset the counter. If the PIP concludes that the break was artificial – because the employee continued performing the same work under a service agreement or through an intermediary – it may aggregate the periods regardless of the formal gap. Employers should document the operational reason for any break exceeding one month.

Q: How long does the employer have to act once a conversion has occurred?

A: Polish labour legislation does not set a specific deadline for the employer to acknowledge or formalise the conversion. The conversion occurs automatically on the day the limit is crossed. However, continuing to treat the employee as a fixed-term employee after conversion – for example, by issuing a termination notice without providing written grounds – constitutes an unlawful dismissal from that point forward. Employers who discover a past conversion should seek legal advice immediately. Delay increases the period of exposure to back-pay and reinstatement claims, which are subject to a three-year limitation period under employment law.

Q: Can an employer and employee agree in writing to waive the 33-month rule?

A: No. The 33-month ceiling is a mandatory provision of Polish labour law. Parties cannot contract out of it. Any clause in an employment contract, settlement agreement, or appendix purporting to waive the employee's right to conversion is void. This is a common misconception among employers who have experience in jurisdictions where fixed-term rules are more flexible. The employee's right to indefinite status upon breach of the ceiling cannot be bargained away, even with the employee's express consent and even where the employee has received financial consideration in exchange.

The specific situation of your company requires individual analysis. Missing the 33-month ceiling – or failing to identify a conversion that has already occurred – forfeits the employer's ability to manage the employment relationship on flexible terms and triggers personal exposure for HR managers and directors who signed the contracts.

If your organisation employs fixed-term workers in Poland and has not conducted a contract audit in the past year, contact info@kordeckipartners.com. Our team will map your exposure, identify any conversions that have already occurred, and design a compliant employment structure – including exemption documentation, PIP notification procedures, and immigration-law coordination where EU Blue Card or work permit holders are involved.

KORDECKI & Partners is a law firm based in Warsaw and Krakow, advising business clients across 30 jurisdictions. Our team combines expertise in Polish and international law with a practical approach to employment law, workforce structuring, and cross-border mobility. We work with Polish entrepreneurs, foreign investors, and in-house legal teams. To discuss your situation, contact info@kordeckipartners.com.