As a seller on Meitodo, you can’t avoid the hurdle of obtaining an RFC tax number. The four common options available—using a SAS tax number, using an SA tax number, registering your own SAS company, and registering your own SA company—all have completely different cost and risk structures.

Cheaper isn't always better, and more expensive doesn't necessarily mean safer. This article will help you break it down step by step.

💡 If you're having trouble deciding which RFC solution to choose, feel free to add me on WeChat qcygscszk or call 18676749275, send [RFC] to receive a one-on-one diagnostic assessment.

Let's get one thing straight: What is the relationship between SAS and SA?

SAS (Simplified Joint-Stock Company) This is a business entity type designed by Mexico for startup micro-enterprises. It offers quick registration and low costs, but has a sales cap—no more than 5 million pesos per year (just over 200,000 RMB). For cross-border stores on Meituan that consistently generate orders, it is quite common to reach this cap within a year. Once exceeded, the business must upgrade to an SA corporation; otherwise, it faces the risk of tax account freezes and fines.

SA (Joint-Stock Company) It is a standard legal entity with no sales revenue cap, making it suitable for long-term operations. The trade-off is that the registration process is more complex, takes longer, and is more expensive.

Option 1: Register under a SAS Tax ID

This is currently the most common entry-level solution on the market.

✔️ Advantage: It’s low-cost, takes only a few days to set up, and can reduce the tax rate from 36% withholding to around 10.5%, making it suitable for short-term trials.

✘ Fatal Flaw:

• Sales are capped at 5 million pesos; once this limit is exceeded, an upgrade is mandatory. Failure to upgrade may result in account suspension and fines.
• You are not the registered owner of the tax ID; if the other party gets into trouble, your store will be shut down as a result.
• Following the 2026 tax reform, platform data will be synchronized in real time with the Mexican tax authority, amplifying the risks associated with registered agents.
• Using multiple accounts on Account No. 1 can easily trigger a linked store suspension, and all linked stores will be affected.

Option 2: Register under an SA Tax ID

An option that is one tier higher than the SAS affiliate program.

✔️ Advantage: There is no sales cap, so you don't have to worry about being forced to upgrade midway. The cost is moderate, making it a relatively low-risk option among affiliate programs.

✘ Outstanding Issues:

• The tax ID is still registered under a third party's name, and you do not have long-term control over it.
• Policy Risk: It remains unclear whether the platform will tighten its “one number, one entity, one store” policy.
• If the service provider goes out of contact or goes out of business, the tax ID cannot be transferred, and the store faces permanent closure.

📌 If you’re currently only looking for a short-term transition, registering as an SA is an option, but we recommend planning your future career path in advance.
Cell phone: 18676749275 ｜ WeChat: qcygscszk

Option 3: Self-Registration of a Mexican Company + Tax ID Number

This is the most compliant solution.

✔️ Advantage: The tax ID is registered entirely in your own name, ensuring long-term independent control, compliant input tax deductions, and no reliance on third parties for maintenance. This eliminates associated risks at the source.

✘ Cost: The registration process takes a relatively long time (the process of registering a company in Mexico takes several months), and the costs are higher than those of a registered address service.

Option 4: Offshore RFC Self-Registration

This is the most compliant solution for cross-border stores, but the barriers to entry are high.

✔️ Advantage: Cross-border stores are matched with offshore tax ID numbers, eliminating the risk of “identity mismatch” on the platform and ensuring the highest level of long-term compliance; tax rates are reported based on actual profits.

✘ Cost: It has the highest costs and the longest registration process, and there are certain requirements regarding the seller’s scale and sales volume. It is suitable for sellers who have decided to commit to the market long-term and pursue a brand-building strategy.

Quick Comparison of the Four Options

reach a verdict

This isn’t a “which one to choose” multiple-choice question, but rather a judgment question asking, “Which stage are you currently in?” For short-term experimentation and rapid validation, using an SA as a placeholder is an acceptable transitional solution;

However, if the product is already up and running, monthly revenue is stable, and you plan to operate in the Mexican market long-term,Registering a company and obtaining a tax ID are the only compliant options. Following the 2026 tax reform, the platform’s data synchronization mechanism has been established, and the risks associated with being registered under another’s name will only increase.

Before making a decision, we recommend consulting a professional team to thoroughly review your specific circumstances—including your budget, cash flow, timeline, and long-term plans.

📞 If you’d like to conduct a comprehensive RFC proposal evaluation tailored to your specific product and budget, please feel free to contact Qicaiying.
Cell phone: 18676749275 ｜ WeChat: qcygscszk

Why choose Enterprise Caiying

What Can We Do for You—

• Domestic Company Registration: A valid business address (owned property), with cooperation for on-site bank verification, account opening, and invoice issuance; not a virtual or registered-only address.
• Mexican RFC Tax ID: Choose from two options—affiliation with an SA or self-registration. Each ID is linked to a single store on a one-to-one basis; we do not put client stores at risk.
• Meike Duo Store Setup: Dual-mode coverage for cross-border and local stores, providing end-to-end support from scratch—not just helping you submit documents
• Operations Coaching: Comprehensive coverage of product selection, listing, warehousing, advertising, and post-campaign analysis—it’s not just about creating a group chat and calling it a day

Why Trust Us—

• Founded in 2015, we have supported more than 500,000 business owners and help establish over 20,000 new domestic companies and 10,000 new Hong Kong companies each year.
• A professional team of over 400 people: domestic business services consultants with at least 5 years of experience, international experts with an average of over 8 years of experience, and an accounting team in the Greater Bay Area with an average of over 10 years of experience
• Headquartered in Shenzhen, with offices in Beijing, Shanghai, Guangzhou, and Hangzhou; 4 corporate secretarial firms in Hong Kong and 1 in-house accounting firm
• The in-house “Yichuangbao” CRM/ERP system, developed over five years with an investment of tens of millions, features standardized and visualized delivery processes.

For more information on opening a store on Meike, please contact Qicaiying:

📱 Cell: 18676749275
💬 WeChat: qcygscszk

Qicaiying | We help you choose the right RFC solution, calculate your costs accurately, and firmly establish a foothold in the Mexican market.