PROSEC (Programas de Promoción Sectorial, or Sectoral Promotion Programs) is a Ministry of Economy (Secretaría de Economía) program that lets manufacturers established in Mexico import listed inputs and machinery at preferential tariffs starting at 0%, whether the finished goods are exported or sold in Mexico. The sections below cover how PROSEC works, how it fits with IMMEX and Rule 8, and what registration and annual reporting require.
The scale of the flows explains why the rate matters. Export manufacturers in Mexico brought in MXN 478.4 billion in temporary imports in July 2026 alone, according to the National Institute of Statistics and Geography (INEGI). At the Bank of Mexico (Banxico) FIX rate for that month, 17.4778 pesos per dollar, that equals about $27.4 billion.
Those goods entered with duties deferred under the IMMEX program, Mexico’s temporary-import regime for export manufacturing. Deferred duties become payable when inputs are exported to markets where USMCA limits deferral or when an IMMEX company converts goods to definitive import, according to EY (2025). For fractions listed in the plant’s PROSEC sector, the program lowers the rate applied to that exposure.
How PROSEC works in Mexico
PROSEC in Mexico is a set of 24 sector programs, created by a presidential decree first published in the Official Gazette of the Federation (DOF) on August 2, 2002, that let registered producers import listed tariff fractions at preferential ad valorem rates. The 24 programs remain in force in 2026. The consolidated decree on the Ministry of Economy’s SNICE portal records DOF reforms published from 2007 through 2024, and amendments change which fractions qualify and at what rate. The current consolidated text is the most dependable reference to consult.
Eligibility rests on what the plant produces. The beneficiary must be a legal entity (persona moral) established in Mexico that manufactures goods the decree lists for its sector. Imported inputs, parts or machinery must go into that production process. Holders request incorporation into additional sectors by proving they produce the corresponding goods.
Rates are set fraction by fraction. Article 5 of the decree sets the preferential rates: they start at 0%, and most listed fractions are either duty-free or carry a 5% rate. Each sector and tariff fraction has its own rate. The practical starting point is a line-by-line map of imported inputs against the plant’s sector annex.
PROSEC lowers duties wherever they are actually paid. A plant imports definitively when it brings in inputs for products sold in Mexico or capital goods it will keep. IMMEX already defers duties on temporary imports, so PROSEC’s value appears in the flows that eventually pay them.
What PROSEC saves and where it fits with IMMEX
The core PROSEC benefit is a lower tariff on listed inputs and capital goods. Every qualifying shipment pays the preferential rate instead of the general rate. The savings concentrate in three flows that export manufacturers encounter as operations mature.
Domestic sales trigger definitive imports. A plant that sells part of its output in Mexico imports those inputs definitively. The general tariff applies unless a PROSEC rate or a trade-agreement preference covers the fraction. For plants that combine export and local sales, PROSEC narrows the cost gap between the two channels.
Duty-deferral rules require payment on some exports. Under the duty-deferral provisions of the USMCA (United States-Mexico-Canada Agreement), IMMEX exporters settle duties on certain non-North American inputs in goods shipped to the US or Canada. When a PROSEC rate covers those inputs, the amount due falls to that preferential rate.
Machinery and equipment that stay in Mexico qualify when listed. Capital goods in the sector annex receive the preferential rate. Rule 8 (Regla Octava), covered in the next section, offers a second route for authorized machinery and inputs.
For inputs sourced outside Mexico’s free trade agreement (FTA) network, the spread between general and preferential rates is wider in 2026. A decree published in the DOF on December 29, 2025, in force since January 1, 2026, raised duties to between 5% and 50% on 1,463 tariff lines for imports from countries without an FTA with Mexico, including China and India, according to Foley & Lardner (2025). Steel, textiles, apparel, footwear, plastics and electronics were among the affected products.
The December 2025 decree left PROSEC and Rule 8 in place, but EY (2025) notes that both apply only within each program’s authorized scope, not as broad exemptions from the new rates. Importers confirm, fraction by fraction, whether a PROSEC rate, a trade-agreement preference or another exemption applies to each reformed line. Textile and apparel chains should also review the decree published in the DOF on December 19, 2024. According to Sánchez Devanny (2025), it barred temporary imports under IMMEX for 320 tariff codes tied to clothing and finished textiles, with no end date.
What Rule 8 is and how it differs from PROSEC
Rule 8 is a Ministry of Economy prior import permit for authorized manufacturers importing qualifying goods under tariff heading 98.02. The Ministry’s 2024 Rule 8 guidance covers inputs, materials, parts, components, machinery and equipment used to make the final goods set out in the PROSEC Decree. Permitted uses include plant expansion, equipment replacement and incorporation into products manufactured or assembled in Mexico.
PROSEC holders are the candidates for Rule 8 permits. For temporary imports under IMMEX, the same guidance and the procedure in the Mexican Single Window for Foreign Trade (VUCEM) require the company to hold both PROSEC and IMMEX.
Each permit defines its scope. Rule 8 treatment turns on the permit, the authorized sector and the production use of each good. The Ministry’s 2025 Rule 8 notice, for example, listed machinery and equipment for steel products among the categories authorized under heading 98.02.
PROSEC, Rule 8 and IMMEX compared
| Instrument | What it covers | Who can use it | Duty treatment |
|---|---|---|---|
| PROSEC | Inputs, parts and capital goods listed for each of 24 sectors | Legal entities in Mexico producing goods listed for their sector | Preferential ad valorem rate from 0%, often 0% or 5% |
| Rule 8 (heading 98.02) | Inputs, parts, components, machinery and equipment for authorized production uses | Authorized manufacturers; PROSEC holders are candidates | Prior import permit under heading 98.02 |
| Rule 8 with IMMEX | Temporary imports under heading 98.02 | Companies holding both PROSEC and IMMEX | Temporary import under the Rule 8 permit |
| IMMEX | Temporary imports of inputs for export production | Manufacturers with IMMEX authorization | Duties deferred while goods are exported |
Treatment varies by tariff fraction, origin and authorization. Validate each fraction against the current decree and permit terms before calculating savings.
A single plant often runs several of these instruments at once, each on a different import flow. The decision happens at the shipment level. Origin, destination market and whether the good stays in Mexico determine which instrument fits.
Sectors that can use PROSEC
Producers in any of the 24 PROSEC sectors can register. The sectors listed in Article 3 of the PROSEC Decree include:
The list also covers industries such as furniture and wood. The decree’s sector definitions set out all 24, each with its own annex of eligible tariff fractions.
Multi-sector plants expand coverage by proving production. A plant whose product mix spans more than one sector requests incorporation into each one. The Ministry of Economy publishes a PROSEC beneficiary directory on its SIICEX transparency page, where companies check registration records by sector.
INEGI counted 6,516 establishments in the IMMEX program in July 2026, employing 3,181,237 people. The 5,211 manufacturing establishments among them employed 2,814,352. Manufacturing exports reached $73.6 billion of Mexico’s $78.0 billion in total exports in August 2026, according to Banxico. Manufacturing also received $13.5 billion of the $35.0 billion in foreign direct investment (FDI) that Mexico registered in the first half of 2026, according to the Ministry of Economy (2026).
Plants in that base that sell locally, retool or settle duty-deferral obligations all carry definitive-import exposure. PROSEC rates apply to that exposure. The larger and more diversified the import flow, the more a fraction-level review changes landed cost.
Registration requirements and annual obligations
PROSEC registration requires a Mexican legal entity with an active Federal Taxpayer Registry (RFC) record and a valid e.firma electronic signature. The company files a request for authorization or expansion through VUCEM, signed by its legal representative. The file includes these supporting documents:
Before resolving, the Ministry requests an opinion from the tax authority on the applicant’s tax obligations. Article 7 of the PROSEC Decree then gives the Ministry a maximum of 20 business days to resolve, and an application left unresolved past that term is deemed approved. Companies should still file well before the first shipment that needs the preferential rate.
Registration renews each year when the holder reports. PROSEC authorizations run annually and renew automatically once the holder files its annual report of foreign trade operations for the prior year. Article 8 of the decree sets the deadline at the last business day of April. The report goes through VUCEM. It includes the RFC, company name, authorized sector, tariff fraction produced, plant addresses and trade balance.
A late report leads to suspension. Under Article 8, a program whose report is not filed on time loses its benefits until the holder files. If the report is still missing on the last business day of June, the program definitively loses its validity. The program also depends on a positive SAT opinion, so tax standing needs the same calendar discipline as customs filings.
How shelter structures affect PROSEC access
In a shelter structure, the shelter provider is the Mexican legal entity and employer of record, so it holds registrations such as IMMEX and PROSEC. The client keeps control of production. The provider’s entity carries the RFC, the program filings and the annual reports that keep authorizations active.
The sector match still governs the benefit. PROSEC rates attach to the sector and the tariff fraction, whoever holds the registration. If a client’s products fall in a sector the shelter entity does not cover, the entity requests incorporation by proving it produces the corresponding goods. Due diligence on a shelter arrangement should confirm these points:
Companies with their own entity carry the registration themselves. An incorporated Mexican subsidiary files its own PROSEC application, maintains its own SAT standing and submits its own annual report. It staffs those tasks internally or contracts administrative support for accounting, tax and customs. The choice follows the broader decision between a shelter arrangement and a standalone entity.
American Industries Group has operated in Mexico since 1976, with more than five decades of experience supporting over 300 foreign manufacturers across 17 industrial parks and 10 operating regions. Under either structure, the PROSEC questions above belong in the same evaluation as IMMEX, payroll and site selection.
Putting PROSEC to work in 2026
PROSEC delivers its full benefit when a plant treats it as a recurring classification exercise tied to sourcing decisions. Registration captures part of the value. The rest comes from keeping the fraction map current as suppliers, products and tariffs change.
Start with the bill of materials. Classify each imported input by tariff fraction. Compare the general rate, any trade-agreement preference and the PROSEC rate for the plant’s sector.
Check origin before rate. Inputs that qualify as originating under USMCA or another Mexican FTA already enter with preferential treatment. PROSEC matters most for non-FTA origins, where the December 2025 reform raised general duties on many lines.
Separate temporary and definitive flows. IMMEX handles deferral on export production. For listed fractions, PROSEC sets the rate on definitive entries and on deferred duties that come due, and Rule 8 covers authorized machinery and inputs under heading 98.02.
Put the annual report on the calendar. Assign an owner for the annual foreign trade report and the SAT opinion, and track the April filing deadline and the June cutoff for suspended programs.
Revisit coverage when the product mix changes. A new product line may fall in another PROSEC sector, which requires proof of production for incorporation. Companies evaluating Mexico should run this review during site and structure planning, before supplier contracts lock in origin.
The bottom line on PROSEC
The value of PROSEC depends on how precisely a plant maps its imports. Take the 10 highest-value imported inputs, confirm their tariff fractions, and compare the general, trade-agreement and PROSEC rates for each. The result shows whether a new registration, a sector expansion or a Rule 8 permit belongs in the plan.
