8 percentage points—how did that difference come about?

After the new withholding regulations take effect in the 2026s, the amount withheld from Meike Duo sellers will depend on just two factors:Is the RFC valid?as well asWhere is the payment account?The

Let's look at several scenarios side by side:

• Valid local RFC + local Mexican bank account: IVA withholding at 8%, ISR withholding at 2.5%, for a total of approximately 10.5%
• Valid local RFC + overseas bank account: IVA withholding tax of 16%, ISR withholding tax of 2.5%, for a total of approximately 18.5%
• Valid Foreign RFC (Offshore Tax ID): Regardless of the account's location, IVA 16%, ISR 0%, totaling approximately 16%
• No valid RFC provided: IVA 16% + ISR 20%, for a total of approximately 36%

In other words, the RFC and the local account requirements apply cumulatively. If you only provide a tax ID but continue to receive payments through a Hong Kong or mainland account, you’ll only qualify for the 18.5% tier—which is still 8 percentage points short of the optimal rate.

For sellers with annual sales in the range of one million U.S. dollars—whose gross profit margins are already squeezed by commissions and shipping costs—these 8 percentage points often represent the break-even point.

What Banks Want: KYC Requirements Are Higher Than Expected

When Mexican local banks review corporate accounts, they focus on three key areas:Authenticity of the Entity, Piercing the Corporate Veil, Source of FundsThe

Common documents include company registration documents, articles of incorporation, RFC tax identification number and CSF tax certificate, proof of the legal representative’s identity and proof of address, a shareholding structure chart, and tier-by-tier disclosure of the ultimate beneficial owner (UBO).

A few practical challenges:

• The legal representative must be present or provide a Power of Attorney (POA). Most banks do not accept accounts opened entirely online.
• e.firma Digital SignatureIt has been reported that shareholders without local residency status face difficulties in completing the process at various stages.
• Description of the Nature of the BusinessBe specific about suppliers, customers, projected revenue, and transaction currencies; general statements will be rejected outright.

According to industry sources, mainstream banks vary significantly in their acceptance of cross-border e-commerce clients, with review periods ranging from several weeks to several months, subject to each bank’s specific requirements.

How can I enter the country without a local residence permit?

Chinese sellers typically take one of two approaches:

Option 1: Local legal representative. Appoint a local Mexican attorney or accountant as the legal representative, who will use their e.firma to handle matters with the tax authorities and banks. This approach allows for a quick setup and low costs, but the company’s key decision-making authority is highly dependent on the other party’s cooperation.

Option 2: Apply for a residence permit on your own. After obtaining a temporary or permanent residence card, you can apply for a personal tax ID and e.firma on your own. You will retain 100% control over the company (100%), but this comes at the cost of a lengthy process and the need to physically enter the country to complete the procedures.

Neither option is inherently better or worse; it depends on how long you plan to stay in Mexico and how much revenue you generate.

Refunds and Disputes: Choosing the Wrong Account Leads to Further Losses

In addition to differences in payroll deductions, account ownership also affects two real-world scenarios:

firstlyReturns and Refunds. The process and time required for the platform to issue a refund after a buyer returns an item are directly related to the location of the receiving account. When refunds are processed for overseas accounts, there is often an additional cross-border step involved, which results in a longer hold time for the funds.

Second,Disputes and Freezes. If the account information does not match the platform operator or the RFC holder, the process of unfreezing funds can become very lengthy in the event of a transaction dispute or if the account is flagged by the platform’s risk control system. The more complete the documentation and the greater the consistency of the account details, the faster the issue will be resolved.

Pitfalls of Account Types and Maintenance

Getting it up and running is just the beginning; maintenance is where the long-term costs lie:

1. Currency and Cross-Border Deposits. Be sure to clarify the functional differences between peso accounts and U.S. dollar accounts first; not all accounts allow for the free receipt of international remittances.
2. Dormant Accounts and Minimum Balances. If an account remains inactive for an extended period or has an insufficient balance, management fees may be charged, and the account may even be frozen.
3. Consistency of Information. The business entity, the RFC holder, and the bank account holder must all be the same person; under the new regulations, any discrepancy will be classified as high-risk by the platform.
4. The cash flow and the financial statements match up. Cross-checking bank data with SAT records has become standard practice, and the funds in your account must be clearly accounted for in your tax return.

If you’re verifying that your materials align with the reporting guidelines, feel free to contact a consultant at Qicaiying (WeChat/Phone: 18676749275), and we’ll walk you through the entire process from start to finish.