EOR vs PEO vs Subsidiary in Mexico: Which Is Right for You?

The short answer: EOR vs PEO in Mexico

If you’re a foreign company looking to hire in Mexico, the EOR vs. PEO decision is usually a terminology trap — not a real choice. After Mexico’s 2021 outsourcing reform, most companies without a Mexican entity need an Employer of Record (EOR), not a PEO. And if you’re planning to hire more than a handful of people long-term, a Mexican subsidiary eventually becomes the cheaper option.

Here’s the quick rule of thumb:

• EOR — You don’t have a Mexican entity. You want to hire 1–50 people, fast, without setup headaches. Go live in 2–4 weeks.
• PEO — You already have a Mexican entity and want help running HR and payroll. True co-employment is restricted in Mexico; this is rarer than US buyers expect.
• Subsidiary — You’re committed to Mexico long-term, plan to hire 50+ people, and want full operational control. Budget 3–6 months for formation.

The rest of this guide walks through each model in detail and makes an EOR vs PEO vs Mexican Subsidiary , then gives you a decision flowchart so you can pick the right structure for your situation.

What is an EOR in Mexico?

An Employer of Record (EOR) is a third-party company that legally employs your workers on your behalf in Mexico. You direct the day-to-day work; the EOR holds the employment contract, runs payroll, files taxes, and carries the compliance risk.

You don’t need a Mexican entity to use an EOR. That’s the whole point.

What the EOR handles:

• Mexican employment contracts (in Spanish, compliant with the Federal Labor Law)
• Payroll processing and CFDI payroll receipts
• IMSS (social security) and INFONAVIT (housing fund) registration and contributions
• Income tax (ISR) withholding and SAT filings
• Aguinaldo, vacation premium, and PTU (profit sharing) calculations
• Severance and terminations
• REPSE registration (mandatory for compliant EOR work after the 2021 reform)

Typical use case: A US software company wants to hire 10 engineers in Guadalajara. Setting up an entity would take 4 months. With an EOR, the first engineer is on payroll in about 3 weeks.

Cost: Usually a flat monthly fee per employee, in addition to the employee’s fully-loaded cost. The EOR fee is the trade-off for speed, simplicity, and a shift in compliance risk.

What is a PEO in Mexico?

A Professional Employer Organization (PEO) is a co-employment model common in the United States. The PEO becomes a co-employer of your workers, sharing HR, payroll, and benefits administration. Critically, the client company still has to be the legal employer of record — which means you need your own Mexican entity.

After Mexico’s 2021 outsourcing reform, the US-style PEO model essentially doesn’t exist in Mexico the way it does in the US. Personnel outsourcing was banned except for “specialized services” that must be registered under REPSE.

So when a global provider sells you a “PEO in Mexico,” nine times out of ten, they’re actually describing:

• An EOR (if you have no Mexican entity) — they just called it a PEO because you’re a US buyer, or
• An HR/payroll administration service (if you already have a Mexican entity) — they run the back office, but you’re still the legal employer.

Read our deep dive on PEO Mexico for the legal nuance, but the practical takeaway is simple: if you don’t have a Mexican entity, the EOR vs PEO debate is simple: you need an EOR, not a PEO.

What is a Mexican subsidiary?

A subsidiary is a company controlled by a holding company. Therefore, a Mexican subsidiary is your own legal entity in Mexico— typically an S de RL de CV (the Mexican equivalent of an LLC) or an SA de CV (the equivalent of a corporation). Your foreign company owns it. It employs your workers directly. It files its own taxes.

As a sidenote, Mexican companies must have at least two shareholders. So, in a Mexican subsidiary, the holding company must own more than 51% (which gives it full control).

What you get:

• Full operational control and intellectual property ownership
• Lowest long-term per-employee cost (no EOR markup)
• Ability to invoice Mexican clients, open local bank accounts, and sign local contracts
• A Mexican tax ID (RFC), which unlocks IMMEX, REPSE, and other programs

What it costs you:

• 3–6 months of formation time (notary public, SAT registration, IMSS, INFONAVIT, local permits)
• Ongoing legal, accounting, and HR infrastructure — you need a local team or outsourced partners
• Full liability for Mexican labor, tax, and corporate compliance
• Real money upfront: incorporation, legal rep, capital requirements, office lease

Most foreign companies that eventually form a Mexican subsidiary start with an EOR, prove out the market for 12–24 months, and migrate once the headcount justifies it.

EOR v

s PEO vs Subsidiary: Side-by-side comparison

Here’s the direct comparison between EOR, PEO, and a Mexican subsidiary:

Factor	EOR	PEO	Mexican Subsidiary
Need a Mexican entity?	No	Yes	You are the entity
Setup time	2–4 weeks	4–8 weeks (after entity exists)	3–6 months
Per-employee monthly cost	Higher (flat fee + payroll)	Medium (service fee only)	Lowest long-term
Upfront cost	Minimal	Medium	High (legal, notary, capital)
Legal employer	EOR	You	You
Compliance liability	EOR carries it	You carry it	You carry it
IP ownership	Via contract	Direct	Direct
Scalability	Good up to ~50 employees	Depends on entity	Unlimited
Control over HR policy	Medium (within EOR framework)	High	Full
Good for	Fast entry, small teams, testing the market	Companies with existing entity wanting HR/payroll help	Long-term commitment, 50+ employees
Typical timeline to first hire	2–4 weeks	Depends on entity	16–24 weeks
Exit flexibility	High — cancel the contract	Medium — unwind services	Low — dissolving an entity is slow

How to choose: A decision flowchart

Walk through these questions in order. The first “yes” tells you which model fits.

1. Do you already have a Mexican entity?

• Yes → Skip to question 3.
• No → Continue to question 2.

2. Are you ready to invest 3–6 months and $15K+ USD to form a Mexican entity before hiring anyone?

• No → Start with an EOR. You can migrate to your own entity later.
• Yes, and we plan to hire 50+ people in Mexico long-term → Form a subsidiary. The EOR markup won’t pencil out at that scale.
• Yes, but we’re testing the market first → Still start with an EOR. Validate, then form the entity once headcount justifies it.

3. You already have a Mexican entity. What do you need help with?

• Running payroll, IMSS, INFONAVIT, CFDI receipts → HR/payroll outsourcing (what US buyers call a “PEO” in Mexico). This is a service layer on top of your entity.
• Hiring specialized workers under REPSE-compliant outsourcing → A specialized services provider (technically distinct from EOR because you already have an entity).
• Full-stack back office, fractional CFO, accounting, legal → A managed-services partner like Start-Ops.

That’s the whole decision. If you got to “EOR” at step 2, you’re in good company: roughly 80% of foreign companies we talk to start there.

EOR vs PEO vs Mexican Subsidiary Common scenarios

Real-world examples of how the choice plays out:

A 15-person US SaaS company hiring 5 engineers in Guadalajara. They want to go fast and aren’t sure how Mexico will work out. EOR. Migrating to an entity at the 25-person mark is a conversation for year two.

A PE-backed manufacturer building a 200-person plant in Monterrey. They’re committing to Mexico for at least a decade, need IMMEX, and will own real estate. Subsidiary from day one. An EOR doesn’t scale economically, and IMMEX requires a Mexican entity.

A 50-person scale-up that already formed an SA de CV three years ago. They have 12 Mexican employees and want help running payroll and keeping compliance tight. HR/payroll outsourcing, which US buyers call a “PEO.” No EOR needed — they’re already the employer.

A US-based founder testing a single senior hire in Mexico City before expanding. She wants someone on payroll fast, with zero infrastructure investment. EOR. If that hire works out, she can hire 5 more under the same EOR, then revisit the structure at 10–15 heads.

The hidden risk: why “contractor” isn’t a fourth option

A lot of companies think they have a fourth choice: just pay Mexican workers as 1099-style contractors and skip the whole EOR vs PEO vs Mexican subsidiary question.

This almost always goes wrong.

Mexican labor authorities aggressively reclassify contractors as employees when:

• The worker works only for you
• You direct their hours, methods, or tools
• The relationship is ongoing (more than a few months)
• They do work that’s part of your core business

When that happens, you owe retroactive:

• IMSS and INFONAVIT contributions (plus penalties)
• Aguinaldo and vacation premiums
• PTU profit sharing
• Severance under Mexican law (which can equal a year of salary for long-tenured workers)
• Fines and joint-liability exposure

In real numbers, a misclassified contractor earning $60K USD/year for three years can create a back-pay liability north of $50K USD when things unwind. That dwarfs what you would have paid for an EOR.

Use contractors for genuine short-term, project-based work from independent providers with multiple clients. Use an EOR for everything else.

When to switch from EOR to subsidiary

Most EOR clients eventually outgrow the model. The typical switch points:

• Headcount crosses ~25–30 employees — EOR per-head fees start to exceed the cost of running your own payroll and compliance function.
• You need IMMEX, REPSE, or other programs — Several regulatory programs require you to be the legal employer.
• You want to invoice Mexican customers in pesos — An EOR doesn’t give you a Mexican entity for sales or contracts.
• You plan to acquire or be acquired — Buyers generally want to inherit a clean Mexican entity, not a web of EOR contracts.

Good EOR partners plan for this transition from day one and will help you migrate employees into your new entity without breaking their tenure (which matters for Mexican severance calculations).

How Start-Ops helps

At Start-Ops, we do all three. We’re one of the few Mexico-only firms that can run you as an EOR today, form your subsidiary when you’re ready, and run the payroll, accounting, and fractional CFO functions afterward — with the same team.

That matters because the EOR-to-subsidiary transition is where global EOR platforms tend to disappear. You hit 30 employees, you need your own entity, and you’re suddenly shopping for a lawyer, an accountant, a payroll vendor, and an HR firm — four new vendors instead of one continuous partner.

We also cover the parts that global platforms don’t:

• REPSE-registered — verifiable on the public registry
• Soft-landing services for foreign executives relocating to Mexico (visas, immigration, housing)
• Bilingual, Guadalajara-based team — you talk to humans, not tickets
• Fractional CFO support for companies that need Mexican financial oversight without a full-time hire

Frequently asked questions

Ready to decide?

If you’re still unsure whether an EOR vs PEO vs Mexican subsidiary is right for your situation, book a call with our team. We’ll walk through your headcount plan, timeline, and risk tolerance and tell you straight up which model fits — even if the answer is “not us, form your own entity.” We’ve been doing this in Mexico for over a decade, and we’d rather give you the right answer than sell you the wrong service.