Executive answer
The maquiladora transition requires precise language. The reform published November 12, 2021 repealed the former third paragraph of Article 182, which allowed compliance through an individual ruling under Article 34-A of the Federal Fiscal Code. Safe Harbor—the greater of 6.9% of assets and 6.5% of costs and expenses—remained Article 182’s mechanism for qualifying maquila operations.
Separately, SAT publishes the Qualified Maquiladora Approach, QMA, arising from a Mexico-U.S. competent-authority arrangement. Its official page says rulings for 2020-2024 are available only to maquiladoras satisfying stated historic conditions connected with a 2019-or-earlier ruling or correct application of Article 182 in the described case.
As of August 2, 2026, do not describe the published QMA as an open option for years after 2024 or assume a future extension. For 2025-2026 prepare statutory Safe Harbor and monitor official releases. A general APA under the Federal Fiscal Code is a separate institution; its existence does not revive the repealed maquila paragraph.
Essential timeline
| Period | Event | Editorial consequence |
|---|---|---|
| before 2021 | Article 182 contained an individual-ruling alternative | review historical text by year |
| Nov. 12, 2021 | reform repeals former third paragraph | do not describe it as current |
| 2020-2024 | SAT publishes conditional QMA coverage | only eligible cases and stated years |
| fiscal year 2025 | first close after published horizon | prepare Safe Harbor and 2026 DIEMSE |
| Aug. 2, 2026 | this article’s cutoff | no later official extension identified in reviewed sources |
The timeline does not replace an individual ruling. Each taxpayer must review its documents.
Three concepts not to mix
Article 182 Safe Harbor. The domestic rule requiring taxable profit at least equal to the greater 6.9% and 6.5% outcome, with defined bases and DIEMSE.
Individual ruling or APA. Article 34-A of the Federal Fiscal Code governs methodology consultations for related-party transactions under its requirements. The former specific Article 182 reference was repealed and should not be cited as current.
QMA. SAT’s published approach in the Mexico-U.S. competent-authority context for taxpayers and years meeting conditions. It is neither every APA nor an automatic promise for future years.
Internal documentation should name the exact instrument, entity and year.
Review the historic position
Build a 2019-2024 inventory of applications, rulings, letters, acceptances, computations, adjustments, payments, returns, DIEMSE, correspondence and status. Identify the legal entity, principal, plant and year each document covers.
Do not assume a group ruling covers every maquiladora. Review company, U.S. principal, period, method, dates and conditions. A principal change, merger or implementation failure may affect coverage.
Reconcile ruling amounts to accounting and returns. Verify that adjustments were implemented and paid. A favorable ruling without correct implementation is not the same as compliance.
Close 2024
For a taxpayer within published QMA coverage, 2024 requires completion of the ruling’s computation and obligations plus Mexican reconciliations. Prepare a close package showing profit, adjustment, tax, returns and counterparty evidence.
Identify differences between QMA criteria and the prospective Safe Harbor data set. Do not contaminate 2025 bases. Preserve separate snapshots and an opening-balance bridge.
Review adjustment receivables/payables, FX and payment. An invoice issued in 2025 for 2024 should remain traceable to its period.
Prepare 2025
From January 2025 the operation should capture Safe Harbor data: Mexican and foreign assets, monthly inventory, ownership, acquisition, FX, costs, foreign expenses, payroll and other activities. Waiting until March 2026 turns transition into reconstruction.
Reconfirm Article 181 qualification. Prior QMA participation does not prove current agreements, revenue, goods and machinery remain compliant. Review principal, treaty, IMMEX and domestic sales.
Forecast both bases and profitability monthly. Identify the dominant test, expected adjustment and investment effect. The CFO should understand that required profit may move because of foreign assets rather than Mexican cost alone.
Zugzwang’s Maquila Transition Review separates historical rulings, QMA close, Article 181 qualification and 2025-2026 Safe Harbor preparation.
2026 annual return and DIEMSE
For fiscal year 2025 reconcile Safe Harbor profit to the annual return under the applicable calendar and DIEMSE in June under Article 182. Retain acknowledgments and form version.
Do not automatically reuse ruling fields. DIEMSE should reflect the greater 6.9%/6.5% outcome and annual bases. Update procedures, owners and manuals.
Where transition creates a true-up, coordinate agreement, invoice, accounting, tax and payment. Demonstrate why it belongs to 2025 rather than an earlier QMA balance.
Compare economics, not only tax
Safe Harbor can produce a different profit from a historic ruling. Model cash, margin, principal charges, commercial agreements and global statements. Explain asset and cost construction to the foreign party.
Do not change operations or ownership solely to reduce the base without business purpose. Machinery transfers have customs, legal and transfer-pricing effects. Assess alternatives before implementation.
Transition may require renegotiating the fee and true-up calendar. The agreement should reflect current mechanics and remove obsolete references prospectively.
What to monitor officially
Monitor the Income Tax Law and reforms, miscellaneous regulations and annexes, SAT, the Official Gazette, competent-authority communications and corresponding U.S. official releases. Distinguish a proposal, news item, agreement and implemented text.
Do not file based on a conference presentation or secondary comment about a possible new approach. An announcement does not amend Article 182. Archive the official source and date of any change.
Assign a regulatory owner with monthly review and an advice trigger. Document a negative search without claiming permanent certainty.
General APA: limits of inference
Article 34-A of the Federal Fiscal Code continues to regulate methodology consultations in its scope, but that does not mean every maquiladora can replace Article 182 with an APA after repeal. Analyze current text, eligibility, subject and authority position.
Do not describe a general application as automatic permanent-establishment protection. Article 181 protection is tied to Article 182 and treaty requirements. Obtain case-specific advice before designing another route.
Illustrative case
A U.S.-owned maquiladora correctly obtained and implemented rulings through 2024. It keeps the same budget margin in 2025 and discovers in February 2026 that 6.9% of foreign assets requires MXN 18 million more profit.
It cannot claim the historic margin continues by custom. It reconstructs monthly inventory, fixed assets, costs and qualification, books the 2025 adjustment, reconciles annual return and DIEMSE and changes its 2026 policy.
Another maquiladora without a 2019 ruling seeks to use 2024 QMA because it belongs to the same group. SAT’s page states conditions; it should test its own eligibility rather than extrapolate.
Transition matrix
| Topic | 2024 historic | 2025 Safe Harbor | Action |
|---|---|---|---|
| source | individual ruling/QMA | Articles 181-182 | archive separately |
| profit | ruling method | greater 6.9/6.5 | recompute |
| data | ruling package | statutory assets and costs | redesign capture |
| adjustment | under ruling | Safe Harbor true-up | separate periods |
| filing | historic obligations | annual + DIEMSE | reconcile |
| agreement | former reference | current formula | prospectively amend |
| monitoring | ruling compliance | monthly Safe Harbor | dashboard |
Adapt the matrix to each case.
Common risks
- using repealed text in a 2025 memorandum;
- describing QMA as open to anyone;
- assuming an extension after 2024;
- mixing 2024 and 2025 adjustments;
- failing to capture monthly foreign inventory;
- keeping an agreement with the old method;
- omitting DIEMSE;
- assuming a general APA replaces Article 182;
- not retesting Article 181;
- telling the principal only the final tax.
Assign owner and closure date to each risk.
Transition governance
Form a team across tax, treasury, accounting, fixed assets, customs, legal, plant and foreign principal. Create a RACI for historical file, 2025 data, agreement, adjustment, annual return, DIEMSE and monitoring.
The committee approves position and source. Maintain a legal-change log with date, document and impact. Train accounting not to apply the historical formula by inertia.
Minimum file
Include historic and current statutory text, individual rulings, QMA evidence, computations and implementation through 2024, close memorandum, Article 181 qualification, 2025 bases, adjustment, agreement, annual return, DIEMSE, acknowledgments, economic analysis and official monitor.
Read each individual ruling
Prepare a sheet for every ruling with number, application, authority, taxpayer, foreign resident, years, transactions, methodology, critical assumptions, annual information, adjustment, payment and termination conditions. Cite page and paragraph rather than relying on an old summary.
Identify conditions requiring acceptance or implementation in the United States, deadlines and correspondence. Verify the counterparty reflected the outcome where the approach required it. Retain translations and payment evidence.
Compare actual facts against assumptions: volume, assets, functions, parties, agreement and ownership. Where facts differed, document communication and effect. A ruling does not protect a materially different transaction without analysis.
The close should certify that no years, filings, payments or reports remain outstanding. If an audit or dispute continues, keep the file open with an owner.
Mexico-U.S. coordination
QMA arises in a bilateral setting. Global tax should reconcile Mexican profit to the principal’s deduction or cost, currency, year and U.S. filings. Timing differences can create balances or double taxation.
Identify who approved the adjustment in each country and when it was recorded. Preserve applicable competent-authority letters or communications rather than assuming a general webpage replaces an individual instrument.
For 2025 explain to the U.S. team that the Mexican computation has a different source. Obtain the principal’s asset and inventory data and agree a calendar. Missing foreign information can prevent a correct 6.9% computation even where Mexican accounting is strong.
Provision and cash flow
Forecast tax, true-up and payment monthly. Safe Harbor profit can rise when a machinery line arrives or inventory grows. Include FX and cost scenarios plus invoice and collection dates.
Reconcile group and Mexican provisions. Explain differences between financial reporting and taxable outcomes. Do not wait for the annual return to tell treasury about a material charge.
Track the historical adjustment balance separately from 2025. Use a distinct invoice reference and account where practical. Avoid netting that erases the period.
Updated maquila agreement
Review clauses referring to APA, QMA, method, target margin, adjustment, information and change in law. Amend prospectively with both parties’ approval and preserve the 2024 version.
The new clause should require foreign-asset data, timely adjustments and DIEMSE coordination. Include notification of ownership, residence and machinery changes. A generic “arm’s-length” promise does not operate the computation.
Test conduct: invoices, payments and reports should follow the current version. Train shared services to use the right formula and period.
Control news and rumors
Maintain a table with date, source, type—law, Official Gazette, SAT, competent authority, draft or commentary—summary, effective status and action. Only an implemented legal source changes the calculation. A release may trigger analysis but does not replace law.
Where no extension is found, say “not identified as of the cutoff in reviewed sources,” not “will never exist.” Repeat the search before filing and archive results.
If a new approach appears, compare eligibility, years, election, methodology and coordination before announcing it. Do not promise savings without text.
Transition adversarial review
A reviewer should ask: which current paragraph authorizes the route; which year does the ruling cover; were conditions implemented; does QMA apply to this entity; is 2024 closed; does 2025 have twelve monthly averages; was the agreement amended; do annual return and DIEMSE reconcile; did the principal record the adjustment; is the later source official?
Every response should link a document. Escalate open matters before signature and filing.
Data migration from ruling to Safe Harbor
Create a mapping from every historical input to the new base: revenue, payroll, operating cost, Mexican assets, foreign machinery, inventory, FX and adjustment. Mark data that never existed under the ruling and assign a new system owner.
Do not carry a historical field merely because it is available. Article 182 definitions control. Conversely, preserve the old calculation for audit and do not overwrite it with the new format.
Test the first three months in parallel. Compare preliminary Safe Harbor with the historic method only to understand economics, not to choose the lower result. Close data gaps before year-end.
Communication to management
Provide a short decision paper stating legal change, entity scope, historical coverage, 2025 method, expected profit, data gaps, filing dates and actions. Separate confirmed law from monitoring items.
The board or CFO should approve resources and contract change, not a legal conclusion outside their role. Global management should acknowledge the foreign-data obligation and expected charge.
Update the paper when an official source changes. Keep earlier versions to show decisions were based on information available at the time.
Sources and cutoff
This article was verified as of August 2, 2026. Consult the current Mexican Income Tax Law and Article 182 reform notes, the SAT Qualified Maquiladora Approach page, the SAT Safe Harbor notice page and the OECD Mexico profile. Verify later publications.
Zugzwang delivers a Maquila Transition Review that closes the historical file and turns 2025-2026 into a controlled Safe Harbor process without treating expectations as law.