Executive answer
A maquila operation for Articles 181 and 182 is not identified solely by an IMMEX authorization, temporary imports or manufacturing for a foreign affiliate. Article 181 sets cumulative tax conditions covering goods, transformation or repair, return, source of productive revenue, incorporation of non-temporary goods, machinery and equipment, foreign ownership and treaty requirements.
Qualification matters because Article 181 prevents permanent-establishment treatment for the foreign resident arising from legal or economic relations with the maquiladora only when its conditions, treaty requirements and Article 182 are satisfied. If the definition fails, obtaining a 6.9%/6.5% outcome does not cure the problem.
Review by period and operating model. A plant may retain IMMEX while changing agreements, selling in Mexico, adding services, acquiring related machinery or processing goods under new flows. Every change needs evidence and, where appropriate, segmentation or redesign.
Qualification tree
- Is there an authorized Maquila Program?
- Is there a maquila agreement with the foreign resident?
- Were goods supplied because of that agreement?
- Are they temporarily imported and returned abroad, including permitted virtual operations?
- Do they undergo recognized transformation or repair?
- Does all productive-activity revenue arise exclusively from maquila operations?
- Are incorporated non-temporary goods exported or returned with temporary goods?
- Do machinery and equipment meet ownership, history and percentage conditions?
- Are domestic sales supported as the statute requires?
- Is an applicable treaty in force and are its requirements and implemented agreements met?
- Is Article 182 correctly applied and DIEMSE filed?
A no does not always produce the same consequence, but it requires analysis before relying on protection.
Goods and agreement
Link agreement, production order, customs entry, inventory, bill of materials and return. The foreign resident supplies goods because of the maquila agreement, while the statute addresses goods of certain foreign third parties under described commercial relationships. Identify owner by lot rather than assuming all foreign material belongs to the principal.
The agreement should define ownership, risks, processes, scrap, quality, delivery, returns and remuneration. Compare conduct. If Mexico purchases material for its own account and sells finished product, the model may resemble another form of manufacturing.
Article 181 does not require return of waste and scrap under the cited condition, but customs treatment and actual disposition still require control. Document destruction, transfer or destination.
Transformation or repair
The statute lists processes treated as transformation, from physical work through testing, marking, packing and product development subject to the stated exception. Still describe what the plant actually performs: engineering, design, prototype, repair, inspection, logistics or services.
An activity may be part of the process or a separate activity. Identify people, assets, revenue and agreements. Do not automatically classify R&D, intangible design or corporate services as maquila merely because they occur in the plant.
Prepare a process map from receipt through return showing ownership, inventory and control points. Test a sample of products.
Temporary import and return
Reconcile Anexo 24, customs entries, balances, discharges and physical or virtual returns. Verify codes, periods, transfers, waste and regularizations. Tax qualification relies on facts that also live in customs systems.
The transformation or repair of goods sold in Mexico without the export customs entry required by the closing language of Article 181 is not treated as a maquila operation. Review domestic sales by SKU, customer, owner and document.
Do not sample only correct exports. Search for exceptions, returns, asset sales, scrap and obsolete goods.
Exclusivity of productive revenue
Section II requires all productive-activity revenue to arise exclusively from maquila operations. Build a revenue map from tax invoices, accounts and agreements: maquila, sales, repair, services, rent, scrap, by-products, engineering and other items.
Not every receipt automatically violates the condition. Classify whether it is productive, ancillary or another activity under law and rules and document reasoning. An “other income” account may contain a material sale.
Where other activities exist, Article 182 says it may apply only to the maquila operation, but this does not remove Article 181’s condition or segmentation needs. Validate compatibility.
Domestic or non-temporary goods
Where Mexican or foreign goods not temporarily imported are incorporated, Article 181 requires their export or return together with temporarily imported goods. Trace bills of material, consumption and finished goods.
Identify purchases by the maquiladora and foreign principal, indirect materials and packaging. Distinguish productive consumption from supplies. Reconcile cost, inventory and customs records.
An ERP may mix owners. Require ownership attributes and lot controls. Improve data prospectively rather than reconstructing only at year-end.
Zugzwang’s Maquila Qualification Review crosses law, agreements, customs, revenue, assets and conduct before Safe Harbor is applied.
Machinery and equipment
Section IV requires transformation or repair using machinery and equipment owned by the foreign resident under the maquila agreement, subject to ownership-history restrictions. It permits supplements under defined cases: property of a commercially connected foreign third party, the maquiladora or a lease from an unrelated party, with conditions.
The foreign resident under the agreement must own at least 30% of machinery and equipment used in the operation, computed under applicable rules. Do not treat this as 30% of balance-sheet assets or machine count. Build an inventory with values, owner, history, use and method.
Investigate assets formerly owned by a related Mexican company. History can matter even if the asset now appears abroad. Retain sale agreements and pricing support.
Shared, idle and new assets need use analysis. Reconcile maintenance, serials, insurance, customs and the physical floor.
Treaty and foreign resident
The opening paragraph of Article 181 conditions protection on Mexico having a treaty with the country of residence and on treaty requirements, including implemented mutual agreements. Obtain a residence certificate, identify the agreement party and review the treaty.
Do not assume common-group status or U.S. residence is enough. Validate entity, period, relevant beneficiary or conditions, structure and changes. Where there are multiple principals, analyze each relationship.
The memorandum should distinguish maquila qualification from any permanent-establishment conclusion for other foreign-resident activities. Protection is specific.
Article 182 as a condition
Once qualified, determine taxable profit as the greater of 6.9% of assets or 6.5% of costs and expenses under the statutory rules. File DIEMSE in June and ensure it reflects the outcome. The text states that failure to file or reflect it prevents application.
Reconcile annual return, DIEMSE, agreement and true-up. Document the option and retain acknowledgments. PT-051 covers the cycle; PT-053 and PT-054 cover the bases.
Illustrative case
A company has IMMEX and an agreement with a U.S. principal. It temporarily imports 85% of material, buys 15% in Mexico, transforms and exports. It also sells scrap, provides engineering to another affiliate and acquired a line formerly owned by a related Mexican company.
The review does not conclude from the program. It proves that Mexican inputs leave in finished goods, classifies scrap and engineering, traces the line and computes foreign machinery ownership. It verifies treaty and DIEMSE. Each point may require segmentation, correction or restructuring.
If engineering creates an intangible and separate productive revenue, it should not be hidden in the maquila fee. If the line fails the history condition, assess its effect on machinery requirements.
Review triggers
- new principal or jurisdiction;
- domestic sale or e-commerce;
- machinery purchase or sale;
- product migration;
- additional engineering or development;
- third-party goods owner;
- Mexican-source inputs;
- merger, demerger or agreement change;
- submaquila or new plant;
- delayed or changed returns.
Business approval should ask the Article 181 question before implementation.
Eligibility file
Retain program and modalities, agreement, residence and treaty, organization chart, process map, bills of material, customs entries and returns, inventory by owner, segmented revenue, machinery values and history, percentage computation, other activities, legal memorandum, Article 182, DIEMSE and acknowledgments.
Add an annual exception timeline. A static file does not prove continuous compliance.
Monthly controls
Customs reports balances and exceptions; finance reports revenue; plant reports assets; procurement reports source of goods; legal reports agreements; tax owns eligibility. A coordinator consolidates the dashboard.
Test domestic sales, new accounts, moved assets and materials without ownership attributes monthly. Recompute machinery percentage and confirm the principal quarterly. Perform an annual adversarial review.
Adversarial questions
Who owns each good; which agreement caused it; how was it returned; which revenue is productive; which assets were previously Mexican-related property; does the foreign resident own the percentage; which additional processes exist; which treaty protects; was Article 182 met; does evidence cover the year?
Do not answer with the program’s name. Answer with documents and data.
Account- and agreement-level revenue testing
Build a reconciliation from total revenue to productive-activity revenue. For each account record customer, agreement, concept, product, tax invoice, goods flow and treatment. Separate FX, interest, asset sales, recoveries, scrap and services. The objective is not to exclude by label but to determine what each item represents under the condition.
Test new agreements and unrelated customers. An engineering invoice may represent maquila support or a standalone service; review people, deliverable, intellectual property and price. Document why revenue is ancillary or why it needs a separate segment.
Compare monthly with budget and prior year. A small account can reveal an operating-model change before becoming material. Tax should approve new plant-related revenue codes.
Multiple foreign residents
Where the plant operates for more than one principal, prepare an entity-level matrix of agreement, goods, assets, residence, treaty, remuneration and DIEMSE. Do not use one entity’s residence certificate for another. Identify shared assets and inventory and the allocation of use.
Review who owns at least the applicable machinery percentage for each operation. An asset of one principal used for another’s product needs analysis rather than automatic allocation. Track serial number, hours or capacity through a verifiable method.
A principal change through restructuring needs an effective date, inventory transfers, agreement novation, residence and customs updates. Avoid periods when agreement, owner and invoicing point to different entities.
Submaquila and third parties
Where another plant or supplier performs part of the process, map who delivers goods, which customs regime applies, who controls the process and how goods return. Determine whether the principal company continues meeting the conditions and whether the third party has separate obligations.
Retain agreements, virtual entries or movements, inventory, quality records and pricing. Subcontracting should not break ownership and return traceability or conceal that Mexico only coordinates a process performed elsewhere.
Foreign third-party owners of goods or machinery qualify only under the statutory conditions. Prove their commercial relationship with the foreign resident under the agreement rather than relying on a generic letter.
Asset due diligence
For machinery obtain original invoice, chain of title, entry date, customs document, serial, location, maintenance and seller relationships. Compare against assets formerly held by related Mexican entities. Circular sales or internal transfers may engage restrictions.
Conduct a physical walkthrough focused on high-value, new, shared and zero-value assets. Match foreign register and local tag. Search for tools, molds, dies and customer equipment outside the fixed-asset register.
The percentage calculation should use the current regulatory methodology. Preserve extraction, valuation and use allocation. Never change owner master data to reach the percentage.
Change governance
Add an “Article 181 gate” to capital projects, new products, domestic sales, engineering, agreements and reorganizations. The form identifies affected requirement, evidence, owner and approval before launch.
Tax cannot learn decisions only from the ledger. Plant reports equipment moves; customs reports flow changes; commercial reports revenue; procurement reports materials; legal reports principal and agreement. A quarterly committee reviews the log.
For an exception freeze facts, quantify the period and obtain legal analysis. Do not assume a true-up can cure it. Remediation may be operational, customs, contractual, tax or combined.
Conclusion memorandum
The memorandum should cite each section, state facts, evidence, exceptions and conclusion. Attach the process map, revenue, goods, machinery, treaty and Article 182 support. Distinguish confirmed facts, assumptions and open items.
Do not issue an absolute conclusion while foreign information is missing. State the condition and deadline. The CFO and foreign resident should acknowledge responsibilities and residual risks.
Acquisition and restructuring review
In an acquisition, do not inherit the seller’s “maquiladora” label without testing. Obtain historic programs, principal agreements, asset ownership, customs balances, revenue and DIEMSE. Identify changes on closing, including owner of inventory and equipment.
If a reorganization moves the foreign principal, confirm treaty and commercial relationships before the effective date. Transfer agreements, certificates and system master data together. A legal share transfer alone may not update operating flows.
Build day-one and post-closing checklists. Assign unresolved customs and machinery-history issues to a named owner with holdback or other contractual protection where appropriate.
Sources and cutoff
This article was verified as of August 2, 2026. Consult the current Mexican Income Tax Law, Articles 181 and 182, the SAT Safe Harbor notice page and the OECD Mexico profile. Verify the IMMEX Decree, Customs Law, trade rules, treaty and current regulations for the facts.
Zugzwang delivers a Maquila Qualification Review turning Article 181 into an evidence and decision matrix before Safe Harbor is computed.