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 does a shelter company work?

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.

What are the four manufacturing models, and how do they compare?

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.

What are 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.

Who are the major shelter companies in Mexico?

Approximately 25 to 30 shelter service providers operate in Mexico as of 2026. The most established are Tetakawi, Tecma, NAPS, Prodensa, IVEMSA, American Industries, Entrada Group, Co-Production International, and TACNA. Most have operated for 30 years or more, and they differ mainly in where they operate, whether they also own the industrial real estate you occupy, and how much of your operation they run.

| Provider | Founded | Base and Mexican footprint | Model | Best known for | |---|---|---|---|---| | Tetakawi | 1986 | Tucson, AZ. Sonora (Empalme, Guaymas), Saltillo, and interior Mexico | Full-service shelter that owns its own industrial parks | Owning the buildings; first to reach Mexico's interior | | Tecma | 1985 | El Paso, TX with Ciudad Juarez. National, border corridors into the Bajio | Full-service shelter, flexible scope, plus facility space | No minimum size; hosts small first operations | | NAPS | 1991 | Solana Beach, CA. Baja border region and the Bajio | Pure-play shelter, administration only, no real estate | Fast setup; most clients stay under its umbrella | | Prodensa | 1985 | Monterrey, with a US office in Houston. National, roughly 15 states | Turnkey shelter plus consulting and real estate | One-stop national group | | IVEMSA | 1982 | Mexicali, with a US office in San Diego. Baja, Sonora, the Bajio, Monterrey | Full-service shelter on a single consolidated fee | Deep Baja roots; one all-in fee | | American Industries | 1976 | Chihuahua, with a US office in El Paso. Northern border, northeast, the Bajio | Full-service shelter plus its own industrial real estate | Shelter and the building from one firm | | Entrada Group | 2002 | US office in Texas. Shared campuses in Fresnillo (Zacatecas) and Celaya (Guanajuato) | Shared-campus shelter with ready-built space | Campus model in the interior, off the border | | Co-Production International (CPI) | 40+ years | San Diego, with a Mexico office in Tijuana. Baja and the Bajio | Full-service IMMEX shelter with a built-in exit to your own entity | Built-in transition to your own entity | | TACNA | 1983 | San Diego. Baja California only | Full-service shelter in leased space, plus BPO | Baja specialist; serves 25 to 1,500+ employees |

Every provider above is a shelter: you operate inside their Mexican entity and IMMEX permit and pay a monthly fee for each employee. It is the fastest way in, and for a first entrant it is often the right one. The question each of them leaves unanswered is the point at which that fee outgrows the cost of holding your own entity, which is the decision the rest of this guide works through.

Tetakawi

Tetakawi (founded in 1986 as The Offshore Group) is the shelter operator that owns the industrial parks its clients occupy. It runs its own manufacturing communities in Sonora, Saltillo, and Mexico's interior, and was the first shelter to take manufacturers beyond the border cities. It bundles the real estate with full administration and serves aerospace, automotive, medical device, and electronics producers.

Tecma

Tecma has run shelter services since 1985 from El Paso, paired with operations in Ciudad Juarez and a national footprint that reaches into the Bajio. Its partnership model covers the full administrative stack and adds facility and warehouse space. Tecma is known for a low barrier to entry, hosting operations that start with only a handful of employees.

NAPS

NAPS (North American Production Sharing, founded in 1991 and based in Solana Beach, California) is one of the longest-running pure-play shelters, providing the legal and IMMEX umbrella and full administration without bundling real estate. It operates across the Baja border region and the Bajio, and states that roughly 85 percent of its clients keep running under its umbrella rather than forming their own entity.

Prodensa

Prodensa (founded in 1985 in Monterrey, with a US office in Houston) is one of Mexico's original shelter groups and its most national, operating across roughly 15 states. It is the rare provider that combines strategic consulting, industrial real estate, and shelter operations under one firm, configured for each project rather than sold as a fixed package.

IVEMSA

IVEMSA (operating since 1982, headquartered in Mexicali with a US office in San Diego) is a Baja California specialist that has extended into Sonora, the Bajio, and Monterrey. Clients manufacture under an IVEMSA-owned entity while it handles legal, HR, customs, and accounting, billed as a single consolidated fee. It also offers standalone managed services for companies that already hold their own entity.

American Industries

American Industries (a Mexican firm founded in 1976, headquartered in Chihuahua with a US office in El Paso) pairs a full-service shelter with its own industrial real estate arm. The same company that acts as your legal entity of record also develops and leases the building you occupy, across the northern border, the northeast, and the Bajio.

Entrada Group

Entrada Group (founded in 2002) takes a different approach with a shared campus model. Rather than a standalone plant, clients operate inside Entrada's supported manufacturing campuses in the interior cities of Fresnillo, Zacatecas and Celaya, Guanajuato, away from the crowded border labor markets. It pairs ready-built space with turnkey administration and aims at small and mid-sized manufacturers.

Co-Production International (CPI)

Co-Production International (CPI), based in San Diego with a Mexico office in Tijuana, runs a full-service IMMEX shelter across Baja and the Bajio. Its distinguishing feature is a built-in exit: its Independent Corporation Program lets a client move from the shelter to a wholly owned Mexican entity at any time, which suits manufacturers that treat the shelter as a temporary landing.

TACNA

TACNA (founded in 1983, based in San Diego) is a Baja California specialist by design, operating only in the Baja border cities rather than nationally. It provides the full shelter stack in leased space and runs its own BPO and manufacturing divisions, and states it serves operations ranging from 25 to more than 1,500 employees.

What does the shelter cost structure look like?

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 should you 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.

Which industries 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.