Accountant in Tijuana 2026: Baja California payroll tax, 0% VAT on exports and IMMEX maquila

The Baja California payroll tax is 2.5% monthly on total compensation paid to workers with their workplace in the state. It is administered by the Baja California State Treasury (SHBC) — with a filing and payment system completely independent from the federal SAT and Mexico City Treasury. The 2.5% rate applies to the broad remuneration base: wages, salaries, bonuses, commissions, and any other employee payment, except employer IMSS contributions, INFONAVIT, and profit sharing (PTU). To register the company with the SHBC: log into the Baja California State Treasury portal, register the physical establishment in Tijuana (or Mexicali, Ensenada, etc.), declare the operations start date, and obtain the state payroll tax registration number — different from the federal RFC. The monthly filing deadline is the 17th of the month following the payroll period. Binational companies with employees both in Tijuana and San Diego must register and declare payroll tax only on compensation for personnel physically working in Baja California, regardless of whether payment is made in USD or MXN. Non-compliance generates 1.5% monthly surcharges plus 70% to 100% fines on the omitted tax for a first violation.

Article 29 of the VAT Law (LIVA) establishes that services provided by Mexican companies to foreign clients — when the benefit of the service is used outside Mexico — are taxed at 0% VAT. For Tijuana companies providing services to clients in San Diego, Los Angeles, or any US city, this means they must issue their CFDI without charging VAT: the invoice carries 0% VAT rate, not 0% "exempt." The difference is critical: the 0% rate allows crediting the VAT paid to Mexican suppliers (office rent, internet, equipment, software), generating a recoverable credit balance via monthly declarations. Three requirements for the 0% rate to apply: first, the client must be a company or individual with a foreign address; second, the service must be used entirely outside Mexico — for mixed services (part of the team in Tijuana, part of the benefit in Mexico), the taxable portion must be separated; third, payment must be received via documented international bank transfer (wire from USD account to Mexican MXN account, with the Banxico exchange rate of the receipt date). The most costly error in Tijuana: billing US clients with 16% VAT out of ignorance, raising service costs compared to providers from other countries and generating unnecessary payable balances that the SAT does not refund easily.

Tijuana concentrates approximately 700 IMMEX-certified companies (Manufacturing, Maquiladora and Export Services Industry) — more than any other Mexican city. The program allows temporarily importing inputs, raw materials, machinery, and equipment without paying import duties or 16% VAT at customs, provided the final product is exported. Tijuana's geographic advantage over Querétaro or Monterrey is unique: the San Diego–Tijuana border crossing (Otay and San Ysidro) is the world's busiest in commercial truck volume, and temporary import processing times are significantly shorter than through inland ports. For IMMEX companies in Tijuana this translates into shorter production cycles and less capital tied up at customs. Additionally, Tijuana is the only Mexican city with direct road access to US suppliers without air transportation — a relevant factor for electronic components, precision plastics, and medical parts. The combination of IMMEX + 0% VAT on exports + access to US suppliers makes Tijuana the most fiscally efficient city in Mexico for light manufacturing and export services.

USD revenues earned by Mexican companies in Tijuana must be converted to Mexican pesos for all tax purposes — both federal (SAT) and state (SHBC). The conversion is made at the Banco de México (Banxico) exchange rate published on the day payment is received, or the CFDI issuance date rate if payment is in advance. This exchange rate must be documented in the CFDI: when an export invoice is issued in USD, the CFDI carries the USD amount and the Banxico rate used. If the exchange rate changes between the invoice date and the collection date, the difference generates a taxable exchange gain or loss for ISR purposes. For the Baja California payroll tax: the taxable base is calculated in pesos — if salaries are paid in USD (common in companies with US clients), they must be converted at the Banxico rate of the payment date before applying the 2.5% payroll tax. A frequent error in Tijuana: paying salaries in USD without tracking the Banxico rate applied, making it impossible to correctly calculate state payroll tax, IMSS contributions, and ISR withholdings. Mexican banks convert USD at the "ventanilla" (counter) rate — which is higher than Banxico. For tax purposes, always use the Banxico published rate for that day, not the bank rate.

Fees for a specialized border business accountant in Tijuana vary by company profile. For a US export services business (call center, software development, design, BPO) with 5-30 employees: between $5,000 and $12,000 MXN monthly at a firm experienced in export invoicing and Banxico exchange rates. For a company with an active IMMEX program (manufacturing, assembly, light maquiladora): between $12,000 and $28,000 MXN monthly, including IMMEX, SHBC payroll tax, REPSE, and federal filings. For binational companies operating in both the US and Mexico (Tijuana entity + California LLC): between $18,000 and $45,000 MXN monthly, covering cross-border tax planning, Mexico-US tax treaty application, and compliance for both countries. The key indicator for an accountant with real Tijuana border experience: they know the CFDI export invoicing process with 0% VAT and Banxico exchange rate use (many generalist accountants do not know the difference between exempt and 0% rate), they have registered a company with the SHBC in Baja California, and they have experience with at least two companies billing in USD. A generalist accountant without border experience can cost over $500,000 pesos in incorrectly charged VAT to US clients over a year.