Accountant in Aguascalientes 2026: 2% state payroll tax, Nissan A1 and COMPAS and REPSE for automotive suppliers
03 Nov 2026|19 min read
Park Ji-ho arrived in Aguascalientes in March 2023 as operations director of a South Korean brake disc supplier certified as Tier-2 for Nissan A1. Twenty months later, a supplier compliance audit revealed three tax problems his Mexico City firm had not detected: the 2% Aguascalientes payroll tax with the SFIT had never been filed separately — his accountant assumed Jalisco registration (where the company incorporated in Guadalajara) covered workers at the AGS plant — four Korean technical supervisors brought under a temporary service agreement had no valid REPSE, leaving the company jointly liable for $780,000 pesos in unpaid IMSS contributions; and a technology license fee paid to the Korean parent had been treated as a simple "technical assistance" deduction without the required Annex 9 transfer pricing study under Art. 76 LISR. Relocating the fiscal address from Jalisco (2.5%) to Aguascalientes (2%) also represents real savings: a company with $4 million monthly payroll pays $240,000 pesos less in payroll tax per year in Aguascalientes.
Aguascalientes is, by per capita automotive export volume, one of Mexico's most manufacturing-intensive states. Two Nissan plants — A1 (2010) and COMPAS (2017, originally a Daimler joint venture, now exclusively Nissan/Infiniti production) — anchor an ecosystem of over 400 Tier-1, Tier-2 and Tier-3 suppliers employing more than 60,000 people. For foreign suppliers entering this ecosystem for the first time, the state's specific tax obligations are not obvious: the 2% payroll tax with the SFIT, differentiated REPSE requirements between A1 and COMPAS, and transfer pricing with a corporate alliance combining Japanese, French and Korean structures.
Aguascalientes payroll tax: 2% with SFIT — advantage over Jalisco
The Aguascalientes payroll tax is 2% monthly on total compensation paid to workers providing services in the state, administered by the SFIT at finanzas.aguascalientes.gob.mx. This is a real advantage over states where many Nissan suppliers have their fiscal address registered.
State
Payroll tax
Administrator
Annual saving vs CDMX*
Mexico City
3.0%
CDMX Treasury
—
Querétaro
3.0%
SHQ
$0
Jalisco
2.5%
JAL Finance
$300,000 MXN
San Luis Potosí
2.5%
SF-SLP
$300,000 MXN
Nuevo León
2.0%
SFNL
$600,000 MXN
Puebla
2.0%
SFA
$600,000 MXN
Guanajuato
2.0%
SFIN
$600,000 MXN
Aguascalientes
2.0%
SFIT
$600,000 MXN
*Annual saving based on $5 million MXN monthly payroll.
Nissan A1 and COMPAS: the 400+ supplier ecosystem and what SAT monitors in 2026
Aguascalientes has two Nissan plants with distinct fiscal profiles. Nissan A1 (2010) employs over 8,000 direct workers producing the Versa, NP300 Frontier and Sentra primarily for North America. COMPAS (2017), originally a Nissan-Daimler joint venture, now produces Nissan and Infiniti QX50 models with a more complex corporate structure. SAT audits on Nissan ecosystem suppliers focus on payroll tax filed to incorrect state authority, REPSE missing for technicians working inside Nissan plants, transfer pricing for technology licenses or loans to Japanese/Korean parents without Annex 9, and IMMEX imports without individual certification.
REPSE in Aguascalientes: specialized services at Nissan plants
Under the 2021 outsourcing reform, the boundary between "selling parts" and "providing specialized services" is the central REPSE criterion. In the Nissan ecosystem: a brake disc supplier delivering to the dock — finished goods sale, no REPSE. A maintenance team entering A1's production line weekly to maintain welding robots per Nissan procedures — specialized service inside the beneficiary's facilities, REPSE required. The additional COMPAS complexity: its corporate structure has changed since the Daimler exit. Service providers with contracts written for the Nissan-Daimler joint structure operating unchanged in 2026 are in an area requiring legal and fiscal review.
Nexoconsult services for companies in Aguascalientes:
Monthly payroll tax registration and filing with the SFIT
IMMEX management: initial certification, annual renewal and Shelter model for foreign companies
REPSE for automotive manufacturing at Nissan A1 and COMPAS
Transfer Pricing Studies for Japanese, Korean and French subsidiaries in the Renault-Nissan-Mitsubishi Alliance
IMMEX in Aguascalientes: certification and the Shelter model for fast starts
IMMEX allows temporary import of inputs without tariffs or VAT for use in export production. Nissan requires Tier-1 suppliers to have IMMEX certification to operate under consignment or cross-border Just in Time supply schemes. The Shelter model (4-6 weeks to start vs 30-60 business days for own certification) is especially relevant for new Korean, Japanese or French investments without a Mexican tax history.
Transfer pricing with the Renault-Nissan-Mitsubishi Alliance: Annex 9 and Japanese/French parent operations
Tier-1 Nissan suppliers in Aguascalientes that are subsidiaries of Japanese or Korean Alliance companies have multiple intercompany transaction types that SAT can audit under Art. 76 LISR: royalties and technology license payments (SAT scrutinizes rates exceeding 3-5% of net sales in automotive manufacturing), intercompany loans (Japanese near-zero rates applied to Mexican loan instruments are a frequent adjustment area), and management services invoiced from headquarters without documented service delivery. The annual Transfer Pricing Study (Annex 9) costs $35,000-$65,000 MXN for subsidiaries with standard manufacturing operations and related parties in one or two countries.
Frequently Asked Questions
The Aguascalientes payroll tax is 2% monthly on total compensation paid to workers providing services in the state. It is administered by the State Finance and Tax Investment Secretariat (SFIT), with portal at finanzas.aguascalientes.gob.mx, independent of the federal SAT and IMSS. The 2% rate is a competitive advantage over Jalisco (2.5%) and Querétaro (3%): a company with $4 million monthly payroll pays $80,000 MXN in payroll tax in AGS versus $100,000 MXN in Jalisco and $120,000 MXN in Querétaro. The most common mistake by automotive suppliers in Aguascalientes: having the fiscal address in Jalisco or Mexico City where they originally registered, but with the plant and workers in AGS. The payroll tax is paid in the state where workers provide services. The monthly filing deadline is the 17th of the following month.
A Nissan supplier in Aguascalientes needs REPSE when providing specialized services inside Nissan facilities — not when selling finished parts or components. The key distinction under the 2021 reform and 2026 SAT criteria: if the company supplies a manufactured part (brake disc, harness, electronic module), that is a finished goods sale and does not require REPSE. If the company sends technicians to work inside the Nissan plant under Nissan specifications and supervision — equipment maintenance, line calibration, in-process quality testing — that is a specialized service and requires REPSE. The additional risk at Aguascalientes is the COMPAS model: the joint plant produces for two distinct brands (Nissan and Infiniti). Service providers working at COMPAS must verify whether their REPSE covers services for both production lines. REPSE renews annually with STPS at repse.stps.gob.mx before September 30. Joint liability can reach up to 3 years of unpaid IMSS contributions.
IMMEX in Aguascalientes operates under the same federal framework as any other state — it is a Ministry of Economy program, not a state one. The logistical advantage of Aguascalientes: 400 km from Mexico City, 200 km from Guadalajara, direct access to federal highway 45D and the Kansas City Southern railway corridor. For a Nissan A1 Tier-1 supplier importing inputs from Japan via Manzanillo (500 km), transit time is 1-2 days, comparable to suppliers in GTO or SLP. Shelter IMMEX is especially relevant in Aguascalientes because many Renault-Nissan-Mitsubishi Alliance suppliers arrive as new foreign investments (Korean, Japanese, French) without a Mexican tax history. The Shelter allows them to start operations in 4-6 weeks under an already-certified IMMEX company while completing their own certification (30-60 business days with the Ministry of Economy). The most expensive mistake: assuming Nissan's IMMEX certification extends automatically to suppliers — it does not.
First-tier Nissan suppliers in Aguascalientes are typically subsidiaries of Japanese companies (Aisin, Denso, JTEKT, NSK) or Korean companies (Hankook, Hyundai Mobis, Mando) in the Renault-Nissan-Mitsubishi Alliance supply chain. Transactions with the parent or other group subsidiaries — technology licenses, intercompany loans, management services, component purchases — are related party transactions under Art. 76 LISR and must be supported by a Transfer Pricing Study (Annex 9 of the annual return). The three highest SAT audit risk points: first, royalty payments for brand or patent use to the Japanese or Korean parent if they exceed the arm's length range; second, intercompany loans at off-market rates; and third, corporate management services invoiced from headquarters without sufficient documentation that the service was actually rendered. Transfer Pricing Study costs for subsidiaries with normal operations in Aguascalientes range from $35,000 to $65,000 MXN annually.
Fees for Nissan automotive suppliers in Aguascalientes vary by company profile. For a Tier-2 supplier with 30-100 employees, primarily local operations and no foreign related parties: between $9,000 and $18,000 MXN monthly for complete accounting, payroll, federal filings (VAT, income tax), payroll tax with SFIT, IMSS/INFONAVIT and basic REPSE compliance. For a Tier-1 supplier with active IMMEX certification, foreign related parties (Japanese, Korean or French) and a Transfer Pricing Study requirement: between $20,000 and $40,000 MXN monthly plus the annual study ($35,000-$65,000 MXN). A key indicator of real Aguascalientes experience: the accountant files payroll tax with SFIT (not Jalisco's SFJ where many companies incorporate), understands the REPSE difference between Nissan A1 and COMPAS, and has experience with transfer pricing studies for the Renault-Nissan-Mitsubishi Alliance.
