Portugal's Frozen Food Workers Win Wage Battle: Inside the Monliz Strike That's Reshaping Labor Rights

The Portugal Ministry of Labour is facing renewed scrutiny as workers at frozen food producer Monliz shut down operations for 24 hours in a strike that underscores deeper fractures within the country's cold storage and food processing sector. The walkout, which affects the company's sole facility in Alpiarça—a rural hub in the Ribatejo region—highlights demands for a €1,050 monthly minimum wage at the plant, a figure 14% above Portugal's national floor of €920, alongside dramatic cuts to working hours and a raft of benefits that have become flashpoints in collective bargaining.

Why This Matters

• Wage pressure: Workers are pushing for an internal salary floor of €1,050, signaling frustration with stagnant pay in a sector whose collective agreement has not been meaningfully revised for over two decades.

• Legal precedent: Monliz was forced by court order in mid-2025 to abandon illegal continuous shift patterns, raising questions about compliance culture in food manufacturing.

• Sector-wide ripple: The strike exposes the gap between technical refrigeration roles averaging €1,990 per month and lower-tier jobs in frozen food packing and processing.

• Negotiation deadlock: Union representatives accuse management of stonewalling talks since 2023, despite the company's public commitment to "constructive social dialogue."

A Company Under Pressure

Monliz—owned by Belgian agro-industrial group Ardo—specializes in the production, packaging, and sale of frozen fruit and vegetables. The Alpiarça plant is a critical node in the company's supply chain, yet it has become a recurring battleground between labor and management. This is the fourth major labor action since August 2022, when workers staged their first-ever strike with 50% participation over pay discrimination and shift violations.

In April 2023, the company refused outright to negotiate the union's annual demands, prompting a wave of resignations. Months later, the National Union of Workers in Food, Beverage, Agriculture, Aquaculture, Fisheries and Related Services (STIAC) filed suit over shift schedules that violated the cold storage sector's collective contract—schedules that gave employees just one day off per week and a full weekend every six weeks. The company capitulated before the first hearing, reorganizing rosters to comply with the 40-hour workweek standard.

Now, workers are back on the picket line. The union's 2026 demands include:

• Immediate implementation of a €1,050 monthly minimum across all roles

• Resumption of collective bargaining for the cold storage sector, frozen since 2003

• 25 working days of paid leave annually

• Reduction of the standard workweek to 35 hours

• Guaranteed paid day off on employees' birthdays

• Enhanced meal and shift allowances

• Rejection of recent labor reform measures

Management issued a terse statement affirming respect for constitutional strike rights and reiterating its "commitment to constructive social dialogue." The company did not address specific wage or scheduling demands.

The 2003 Problem

At the heart of the dispute lies a collective agreement that union officials say has been effectively moribund for 23 years. While a broader contract between the National Association of the Cold Industry and Food Products Commerce (ALIF) and another union was revised as recently as 2022 and 2023—with salary tables valid through December 2025—STIAC insists the subsector covering Monliz's operations remains untouched since the early 2000s.

This discrepancy may reflect fragmentation within the "cold sector," where refrigeration technicians, warehouse operators, and processing line staff fall under different agreements. Certified refrigeration technicians—those handling fluorinated gases and HVAC systems—command an average monthly salary of €1,990 as of April 2026, according to job postings across Portugal. By contrast, production and packaging roles at frozen food facilities appear locked at wage levels far closer to the national minimum.

What This Means for Residents

For consumers, the immediate risk is supply chain disruption. Monliz is a key supplier of frozen vegetables and fruits to Portuguese supermarkets and export markets, and a prolonged work stoppage could tighten availability or push up prices for staples like frozen peas, spinach, and mixed vegetables.

For workers in adjacent sectors, the Monliz strike is a litmus test. If the union secures its €1,050 floor—roughly €170 above the national baseline—it could embolden employees at other food processing plants in the Ribatejo agricultural belt and beyond. The demand for a 35-hour workweek, already a rallying cry in public sector negotiations, would mark a significant departure from the 40-hour standard still prevalent in Portuguese manufacturing.

For employers, the case is a cautionary tale. The company's history of illegal shift patterns, refusal to negotiate, and eventual court-ordered compliance suggests a strategy of resistance that has only deepened worker militancy. The strike underscores the cost of neglecting collective bargaining in a labor market where technical roles are in high demand but lower-tier positions remain undervalued.

Legal and Political Context

Portugal's labor code enshrines the right to strike and mandates employer responsibility for workplace health and safety, including temperature and humidity control—critical in cold storage environments. The 2025 court ruling against Monliz's shift schedules demonstrated that even continuous-operation facilities cannot circumvent collective agreements or override statutory rest periods.

Meanwhile, the broader food and beverage sector has seen a wave of contract renewals. In January 2026, the Confederation of Farmers of Portugal (CAP) and a major union updated wage tables starting at the national minimum for entry-level roles, with meal allowances set at €5.25 per day. In the retail and distribution segment, the Association of Food Product Distributors (ADIPA) agreed to an average 5.1% salary increase for 2026.

Monliz's workers argue they have been left behind. The company's official recruitment materials—circulated via Talent Portugal—tout career progression, continuous training, health insurance (including mental health support), and attendance bonuses. Yet employee reviews on platforms like Indeed cite "very intensive working hours," "irregularity of work functions," and "very low salaries," painting a picture at odds with the corporate messaging.

The Road Ahead

The strike, scheduled to run from midnight to midnight, included a 9:30 a.m. worker assembly at the Alpiarça site. Union organizers have not ruled out further action if negotiations remain stalled. For now, the standoff places both sides in a high-stakes waiting game: the company risks operational paralysis and reputational damage, while workers gamble that sustained pressure will finally force a deal.

For Portugal's industrial relations landscape, the Monliz saga is a reminder that unresolved grievances in low-visibility sectors can accumulate over years, erupting into crises that expose systemic weaknesses. As the country navigates post-pandemic labor shortages, inflationary pressure, and demands for work-life balance reform, the outcome in Alpiarça may offer an early indicator of whether dialogue or conflict becomes the defining mode of the next bargaining cycle.