Executive answer
Rule 3.9.1.1 of the 2026 Miscellaneous Tax Resolution distinguishes real adjustments, which have both tax and accounting effects, from virtual adjustments, which have tax effects only. Classification is not selected to simplify the work; it should describe whether the parties changed consideration and how the dealing was recorded.
A real adjustment may create an invoice or other document, a receivable or payable, an accounting entry, settlement and a counterparty effect. A virtual adjustment is reflected in the tax computation without changing contractual price or accounting. Both may change income or deductions and must satisfy rules, deadlines, filings and evidence.
The Resolution also recognizes variants such as voluntary or compensating, primary and corresponding. Real versus virtual answers one dimension; the variant addresses source and relationship between adjustments. A proper memorandum classifies both.
Definition and nature
The rule treats as an adjustment any change to price, consideration or margin intended to bring income or deductions to arm’s length, even without cash flow. The adjustment retains the concept or nature of the underlying dealing.
A service true-up remains a service; a goods adjustment connects with the purchase or sale; a financial adjustment with interest or finance. It should not be recorded in a generic category that erases consequences.
No cash does not make an adjustment virtual. A real adjustment can remain outstanding. Filing an amended return does not make it real either. Examine consideration and accounting.
Comparison
| Dimension | Real | Virtual |
|---|---|---|
| Consideration | Changes | Does not change |
| Accounting | Has an effect | No adjustment entry |
| Tax | Has an effect | Has an effect |
| Document | May need invoice/note/foreign record | Tax workpaper and return |
| Counterparty | Usually recognizes an effect | May not change books |
| Balance/payment | May arise | Not from the adjustment itself |
| Reconciliation | Books-tax-document | Tax to books |
| Risk | Execution and multi-tax | Deduction, asymmetry and support |
The table guides; current rules and facts determine the answer.
Adjustment variants
Voluntary or compensating
The taxpayer makes it to bring a controlled dealing to arm’s length before filing the normal or amended annual return under the current definition. It may be real or virtual depending on effects.
Primary
It results from the tax authority’s audit powers over one taxpayer and changes its base. Treatment and defense depend on the official act.
Domestic corresponding
It seeks the related effect for the Mexican counterparty following a primary adjustment. It is not automatic; applicable facts, evidence and notice requirements must be met.
Foreign corresponding
It follows a foreign-authority adjustment and may involve a treaty or mutual agreement procedure. Mexico must recognize it through the applicable route; the Mexican party cannot simply copy the amount.
Classification tree
- Did the agreed price or consideration change?
- Was or will a document modifying the dealing be issued?
- Is there a receivable, payable or settlement?
- Does accounting recognize income, expense, asset or liability?
- Does only the tax reconciliation change?
- Who initiated it: taxpayer or authority?
- Is there a prior primary adjustment?
- Is the counterparty domestic or foreign?
- Is the adjustment before or after deadlines?
- Which filings, notices and requirements apply?
Record answers and evidence. Where facts conflict, do not assign the label before resolution.
Classification matrix
| Fact | Real/virtual | Variant | Evidence |
|---|---|---|---|
| Additional invoice before annual return | Real | Voluntary/compensating | Calculation, invoice, entry |
| Deduction only in tax reconciliation | Virtual | Voluntary/compensating | Tax paper and returns |
| Tax authority assesses income | Depends on execution | Primary | Official act and calculation |
| Mexican counterparty seeks effect | Depends on execution | Domestic corresponding | Correction and notice |
| Foreign authority adjusts | Depends on route | Foreign corresponding | Act, treaty, translation |
| APA changes years | Per ruling | Article 34-A ruling | Ruling and forms |
Examples do not replace individual analysis.
Before issuing a document or claiming a tax deduction, classify effects and variant in a matrix approved by tax and accounting.
Real service adjustment
Mexico received services and the analysis shows an insufficient charge. The parties amend consideration, the provider issues a document, and Mexico records expense and a payable. This is real, subject to deduction, VAT, withholding, service evidence and counterparty review.
The file links agreement, deliverables, base, markup, document, entry and filings. The adjustment does not cure missing materiality.
If only the tax deduction is increased without changing the charge, the adjustment would be virtual in this dimension; explain why consideration remains and how the rules are satisfied.
Real imported-goods adjustment
A distributor records a credit note reducing purchase price. Inventory or cost, account and counterparty change. It is real. Customs value, import VAT, customs entries and period also need analysis.
Do not post the entire note to income or expense without addressing sold and unsold inventory. Coordinate cost of goods.
Real classification does not decide customs treatment.
Virtual case
The taxpayer changes only the tax reconciliation to reflect arm’s length conditions, with no document or accounting change. Retain the calculation, rule, filing, effect and reason for not changing consideration.
The book-tax asymmetry should appear in workpapers and returns. Assess temporary or permanent differences and deferred-tax treatment under accounting policy.
Do not use virtual merely to avoid coordination where the parties actually agreed and paid another price.
Increase and decrease
Rule 3.9.1.2 distinguishes consequences when an adjustment increases or decreases price, consideration or margin and according to whether the entity earned income or took a deduction. Build a matrix by direction and role.
Do not assume every decrease creates a deduction. Rule 3.9.1.3 contains requirements for increased deductions, in addition to general tax provisions. The authority retains audit powers.
Recalculate provisional payments, annual return and other fields where relevant. Document signs from each party’s perspective.
Deadline and deductibility
Identify detection, execution, annual-return, ISSIF, statutory-audit and related-filing dates. Voluntary/compensating adjustments and deductions have deadlines. Later rulings receive specific treatment.
A late real adjustment does not become deductible merely because a document is issued. A timely virtual adjustment does not replace materiality or arm’s length evidence.
Prepare the calendar and conclusion before posting.
Counterparty and symmetry
A real adjustment normally creates a counterparty effect, but currency, accounting and country differences may produce asymmetry. Reconcile gross amount, tax, date and nature.
A virtual adjustment may not create a counterparty accounting entry, while its tax result may cause double taxation or a challenged benefit. Assess the corresponding route.
Obtain written confirmation and both-side workpapers where possible.
Documents and entries
PT-028 develops invoice mechanics. Classification should precede the document. For a real adjustment, determine invoice, credit note, supplement or foreign document based on the dealing. For virtual, do not invent an invoice; preserve the tax reconciliation.
Entries should use the original-nature account and reference. Flag the related party. Do not group everything in other expense.
Maintain before-and-after versions and filing traceability.
Additional effects
Income-tax classification does not decide VAT, excise, withholding or customs. A real adjustment often creates more interactions, but a virtual adjustment may also affect bases or returns depending on facts.
Analyze treaty and double taxation for foreign parties. For domestic parties, coordinate correction and inconsistent-filing risk.
Prepare a tax-document-return-owner matrix.
Common errors
- Calling every unpaid adjustment virtual.
- Calling an adjustment real because an amended return was filed.
- Omitting the variant.
- Changing the nature to “TP adjustment.”
- Issuing an invoice before classification.
- Taking a deduction without Rule 3.9.1.3.
- Ignoring the counterparty.
- Confusing corresponding and voluntary adjustments.
- Failing to reconcile signs.
- Treating a label as legal basis.
Quality control
The Adjustment Classification Memo contains facts, rule, real/virtual conclusion, variant, direction, counterparty, deadline, documents, taxes and filings. Tax and accounting approve it.
A reviewer reproduces the flow from calculation to return. Indirect-tax functions validate their effects. Later changes require a new version.
Classification evidence matrix
| Question | Real evidence | Virtual evidence |
|---|---|---|
| Did consideration change? | Agreement, note or confirmation | Memorandum that it remains |
| Did accounting change? | Entry and ledger | Memorandum accounts/reconciliation |
| Is there a balance? | Subledger and confirmation | None created by adjustment |
| What did the counterparty report? | Entry and return | Asymmetry analysis |
| How is it reported? | Document–book–tax | Book–reconciliation–tax |
Do not answer with an unsupported yes or no. Link every response to a dated record and owner.
Asymmetry scenarios
One entity may post a real adjustment while the counterparty records it in another period because of closing, currency or acceptance. That does not automatically change Mexican classification, but creates a difference to reconcile and may affect deduction or double taxation.
Another asymmetry arises when Mexico takes a virtual effect and the counterparty issues a document. The facts no longer match the premise. Pause filing, determine whether consideration changed and reclassify where needed.
For a corresponding adjustment, the authority may recognize another amount or year than the primary adjustment. Do not force accounting symmetry; follow the ruling and document the bridge. Distinguish explainable asymmetry from unresolved contradiction.
Change control
Lock the approved version. If the document, settlement, counterparty or return changes, reassess real/virtual treatment and variant. Preserve history so a reviewer can understand why the final classification differs from the draft.
Related topics
- PT-026: year-end decision.
- PT-028 through PT-030: execution, taxes and notices.
- PT-088: corresponding adjustment.
Adjustment classification memorandum
Describe the original transaction, result, deviation and proposed mechanism. Then determine whether consideration, receivable or payable, invoice, cash flow and both parties’ accounting change. This sequence distinguishes real, virtual, primary, corresponding and secondary adjustments without relying on the label used in an email.
For each classification list effects, documents, date, currency, taxes and returns. Assess whether the counterparty recognizes the same amount and period. Where more than one view exists, quantify scenarios and obtain approval before posting. A unilateral entry can fix a local figure while worsening double taxation.
Retain the calculation, applied rule, agreement, communication, entry, invoice, payment and updates. A reviewer traces the amount end to end. The memorandum explains not only how much changed, but which legal and economic relationship changed and why the chosen treatment follows the facts.
Sources and verification date
- 2026 Miscellaneous Tax Resolution, Rules 3.9.1.1 through 3.9.1.4, subject to amendments.
- Mexican Income Tax Law, current text, Articles 76, 179 and 180.
- Annex 2 to the 2026 Resolution.
Sources checked on August 2, 2026. Classification depends on facts, year, ruling and execution. This article is not a specific opinion.
Request an Adjustment Classification Memo to determine real or virtual treatment, variant, documents, counterparty and compliance route.