Shelter Companies in Mexico: How They Work and When You Need One.

A shelter company is the fastest way to start manufacturing in Mexico without forming your own legal entity. The model has existed since Mexico's original maquiladora program in 1965 and has evolved into a sophisticated operating framework under the current IMMEX program.

For US and Canadian manufacturers entering Mexico for the first time, the shelter model answers a fundamental question: how do you start producing in months, not years, while someone else handles the regulatory complexity?

How it works

The shelter company is a Mexican legal entity that holds the IMMEX certification, all necessary licenses, tax registrations, and bank accounts. The foreign manufacturer operates under this existing legal umbrella.

What the shelter handles:

• Legal entity management and IMMEX compliance
• All HR, payroll, and employee benefits administration
• IMSS (social security), INFONAVIT (housing), and SAR (retirement) contributions
• Tax filings and compliance with SAT
• Customs and import/export processing
• Environmental permits and regulatory filings
• Facility management and lease negotiation

What you control:

• Manufacturing processes and production schedules
• Quality standards and quality management systems
• Equipment selection and maintenance
• Raw material specifications and sourcing
• Product design and intellectual property
• Workforce training and production targets

The shelter is the legal employer of all Mexican workers. The shelter is the importer of record. All customs liability, labor disputes, and regulatory obligations are the shelter's responsibility. Your company focuses exclusively on production.

The four manufacturing models compared

Understanding when to use a shelter requires understanding all four options.

Standalone entity (SA de CV / S de RL de CV)

You form your own Mexican subsidiary with its own IMMEX permit, workforce, and compliance infrastructure.

Pros: Maximum control. No ongoing shelter fees. Can sell domestically. Full corporate identity. Cons: 6 to 12 months to set up. Must build compliance, HR, legal, and accounting teams. Full regulatory liability. High upfront investment. Best for: Large companies with scale, budget, and long-term commitment. Companies that have graduated from shelter.

For entity structure options, see our guide to Mexico entity structures.

Shelter manufacturing

You operate under the shelter's existing IMMEX permit and legal entity.

Pros: Operational in 30 to 90 days. No Mexican entity needed. Reduced regulatory risk. Lower upfront investment. Permanent Establishment protection via safe harbor. Cons: Less control over non-core functions. Ongoing management fees. Cannot sell domestically. Dependency on shelter partner. Best for: First-time entrants. Small to mid-size manufacturers. Companies testing the market before committing to standalone.

Contract manufacturing

A third-party Mexican company produces goods to your specifications.

Pros: Lowest commitment. No Mexican operations to manage. Cons: Least control. IP exposure risk. Markup on all costs. Quality harder to enforce. Best for: Overflow production. Market testing. Companies not ready for a physical presence.

For a full guide, see our contract manufacturing in Mexico article.

Employer of Record (EOR)

An EOR hires employees on your behalf and manages payroll, benefits, and compliance.

Pros: Start hiring in weeks. No entity needed. Cons: Not designed for manufacturing with physical facilities. No IMMEX or duty-free import capability. Limited scalability. Best for: Remote hires (sales reps, engineers). Pre-commitment staffing. Service operations, not manufacturing.

For EOR details, see our guide to hiring employees in Mexico.

The IMMEX shelter program specifics

The shelter operates under Mexico's IMMEX program, which allows duty-free temporary import of raw materials, components, and equipment used in manufacturing for export.

Temporary import periods:

• Raw materials: up to 18 months
• Containers and packaging: up to 18 months
• Fuels and lubricants: up to 18 months
• Machinery and equipment: duration of the IMMEX program
• Certified companies: extended to 36 months
• Companies meeting strict inventory control requirements: up to 60 months

The 4-year rule is gone

Before 2020, foreign companies operating through a shelter were exempt from Permanent Establishment (PE) status for 4 consecutive years. After 4 years, they had to transition to their own entity or face PE taxation.

The 2020 tax reform repealed this automatic exemption. Now, foreign companies must comply with 5 requirements from day one to avoid PE status:

1. Register in the Federal Taxpayers Registry (RFC)
2. Submit monthly and annual tax returns
3. File annual DIEMSE information returns by June
4. Notify authorities when ceasing operations
5. Reside in a jurisdiction with a tax information exchange agreement with Mexico

If the shelter meets Safe Harbor profitability thresholds (taxable income calculated as the higher of 6.9% of total asset value or 6.5% of total costs and expenses, taxed at 30%), the foreign company avoids PE status indefinitely. Not 4 years. Indefinitely. This made the shelter model viable as a permanent operating strategy.

Since 2025, Safe Harbor is the sole fiscal methodology. Advanced Pricing Agreements (APAs) were fully phased out.

The major shelter companies

Approximately 25 to 30 shelter service providers operate in Mexico as of 2026.

Tecma Group. Founded 1985. Headquartered in El Paso, TX. Locations in Ciudad Juarez, Tijuana, Rosarito, Torreon, and Silao. Nearly 40 years of experience. Has served over 600 companies.

Tetakawi (formerly The Offshore Group). Founded 1986. Headquartered in Tucson, AZ. Locations in Empalme/Guaymas (Sonora), Saltillo (Coahuila), and Queretaro. First shelter provider to help companies locate in Mexico's interior, not just border cities. Over 10,000 employees across operations.

NAPS (North American Production Sharing). Over 30 years in operation. 16 locations across Mexico. Approximately 85% of their client base operates under shelter.

Prodensa. Founded 1985. Team of 700. Over 70 active IMMEX operations. 15 offices across Mexico plus offices in Europe, China, and the US. Has served over 1,000 clients. The only shelter provider combining strategic consulting, industrial real estate, and operational startup under one firm.

Entrada Group. Manufacturing campuses in Fresnillo (Zacatecas) and Celaya (Guanajuato). 200,000 sqft of industrial park space. Specializes in central Mexico manufacturing for medical devices and automotive.

American Industries. Nearly 50 years of experience. Full shelter service partnership model for manufacturing and distribution.

Other notable providers include IVEMSA, Co-Production International (CPI), and TACNA.

Cost structure

Management fees

Shelter companies typically charge $350 to $550 per employee per month. This covers entity management, HR administration, payroll processing, compliance, and regulatory filings.

Fee models vary by provider:

• Sliding scale: Per-head rate that decreases as headcount grows
• Transaction fees: Percentage charged on purchases or payroll runs
• Startup fees: Recruiting and initial setup costs
• Early cancellation and wind-up fees may apply

Example: 200-person operation in Tijuana

| Cost Category | Monthly | |---|---| | Administrative/shelter fees (at $450/person) | $90,000 | | Direct labor (fully burdened, border zone) | $246,400 | | Industrial real estate (50,000 sqft at $0.80/sqft) | $40,000 |

Safe harbor tax obligation

The shelter must pay Mexican income tax at 30% on the higher of 6.9% of total asset value or 6.5% of total costs and expenses. This cost is typically passed through to the foreign client.

What is not included

The foreign company pays directly for raw materials and components, production equipment, utilities (electricity, gas, water, telecom), employee transportation, and building lease. The shelter fee covers only the administrative and compliance wrapper.

Advantages

Speed. 30 to 90 days from contract signing to production. Compared to 6 to 12 months for a standalone entity. For companies responding to tariff changes or customer demands, this speed is decisive.

No entity required. Operate under the shelter's established legal entity, IMMEX permit, and bank accounts. Skip the 4 to 12 week incorporation process entirely.

Regulatory risk transfer. The shelter absorbs compliance liability for customs, labor, tax, and environmental regulations. Your plant leadership focuses on production and quality, not administrative overhead.

PE protection. Indefinite Permanent Establishment avoidance via safe harbor, as long as compliance requirements are met.

Labor risk mitigation. The shelter is the legal employer. Severance obligations, labor disputes, and union negotiations are the shelter's responsibility.

Tariff flexibility. Shelter companies can reclassify goods, modify sourcing, and adjust documentation faster than standalone operations when tariff rules change.

Disadvantages

Less direct control over non-core functions like HR policies, vendor selection for administrative services, and facility maintenance details.

Ongoing fees. At $350 to $550 per employee per month, the costs compound. A 500-person operation pays $175,000 to $275,000 per month in shelter fees alone. At some point, the math favors building your own infrastructure.

No domestic sales. Companies operating under shelter IMMEX can only export. If you want to sell into the Mexican domestic market, you need your own entity.

Dependency risk. Switching shelter providers is complex and disruptive. Service delivery depends on a chain of coordinated providers.

Safe harbor tax methodology. Eliminates APA flexibility. May result in higher tax liability for asset-heavy operations.

When to graduate to your own entity

Most companies evaluate graduation after 3 to 4 years of stable operations. The triggers:

• Headcount exceeds 500 to 1,000. At this scale, the cost of an internal compliance team is lower than shelter fees.
• Domestic sales needed. Shelter restricts you to exports.
• Full control desired. Over all operations, vendor relationships, and corporate identity.
• Internal knowledge sufficient. Your team understands Mexican regulations enough to manage compliance.

The transition takes 6 to 12 months. You must obtain your own IMMEX license, transfer all employee relationships (re-hire under the new entity), renegotiate supplier contracts, and assume direct compliance liability.

Many manufacturers that enter through shelter stay long-term. Particularly in highly regulated industries like aerospace and medical devices, where production leadership cannot afford to be distracted by administrative complexity. The shelter model is not just a stepping stone. For many companies, it is the permanent operating model.

Industries that use shelter most

Automotive. 22% of USMCA trade flows through Mexico's automotive sector. 8 EV OEMs operating in Mexico as of 2024.

Aerospace. 14% annual export growth. 380 facilities, 60,000 workers. Primary hubs in Baja California, Sonora, Queretaro, and Chihuahua.

Electronics. Over $100 billion in annual exports. 86% destined for the US. 400,000 workers.

Medical devices. Mexico is the number one medical device exporter to the United States. 70% of facilities operate in controlled environments with FDA, CE, and ISO 13485 certifications.

Consumer goods. Food, household items, appliances, furniture, apparel.

What changed in 2025 and 2026

IMMEX enforcement surge. Over 600 IMMEX programs were suspended in 2025 for operational inconsistencies, documentation failures, or insufficient controls. Compliance is no longer optional.

Customs law reform (January 2026). Mexico introduced a digital, predictive supervision model for customs operations. Companies must now substantiate that imported goods were effectively transformed. Customs dossiers require financial flows, contracts, logistics costs, and valuation adjustments.

Safe harbor as sole methodology. APAs fully phased out. All maquiladoras must use safe harbor rules for tax compliance from 2025 onward.

SAT audit expansion. Mexico expects customs revenue to rise from approximately MXN 151.7 billion (2025) to MXN 254.7 billion (2026). SAT has expanded audit focus on foreign trade taxpayers.

40-hour workweek reform. The March 2026 constitutional amendment mandates a gradual reduction from 48 to 40 hours per week by 2030 with no pay reduction. This affects per-unit labor cost projections for all manufacturing models.

The decision framework

| Your Situation | Recommended Model | |---|---| | First time in Mexico, manufacturing for export | Shelter | | Need to start producing within 90 days | Shelter | | Fewer than 50 employees, non-manufacturing | EOR | | Want to test Mexico before full commitment | Contract manufacturing | | 500+ employees, proven operations, ready for full control | Standalone entity | | Need to sell into the Mexican domestic market | Standalone entity |

Getting started

The shelter model removes the hardest barriers to manufacturing in Mexico: entity formation, regulatory compliance, and employment liability. It does not remove the need for sound strategy, proper partner selection, and clear-eyed cost analysis.

If you are evaluating shelter providers or trying to determine which manufacturing model fits your operation, we can help you think through it. We have relationships across the shelter ecosystem and can match you with the right partner for your sector, scale, and timeline.