It is the document describing the group rather than any one transaction: the legal and ownership structure, what drives the business, where the intangibles sit and who develops them, how the group is financed internally, and its financial position. It carries no pricing calculation for a particular entity. Its job is to give an administration the context in which a local entity's numbers are meant to make sense. Because it is filed locally in several countries at once, each of those administrations ends up reading the same account of where the group says its value is created.
Master file — meaning in cross-border tax
Master file: the meaning, where it applies, and the filing it changes.
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A transfer-pricing document describing the group as a whole — structure, intangibles, financing — filed locally in several countries at once.
Where the money is
These terms turn on functions, risks and evidence rather than on contracts. Where the paperwork says one thing and the conduct says another, authorities follow the conduct.

The same word, two meanings
Where a definition depends on a threshold, the two systems usually measure the same underlying thing on different bases — gross against net, cost against market, calendar against fiscal. Two correct measurements of the same facts can therefore land on opposite sides.
Where it appears in a filing
The term is abstract until it is attached to a filing. These are the filings it attaches to.
What it means for your own file
Recognising Master file in your own paperwork is the useful skill. Working out which side of it you fall on is a short call. If you already have an adviser, we will tell you what they should be asking rather than replacing them.
Terms like this are worth learning only to the point where you can spot the question. Past that point it is a computation on your own facts, and that is a conversation rather than a glossary entry.
Reviewed against current guidance for the 2025 and 2026 filing seasons by Udit Gupta, International Tax, Cross-Border Tax & Transfer Pricing Expert, Legal Quotient Consultants. Published as general information. For a position on your own file, call the 24-hour helpline.
Master international tax, in practice
If you came here for master international tax, this is where it is dealt with. The subject is master file, and the page covers who it reaches, what then has to be filed, and what we charge to do the work.
Cross-border situations we are engaged for
Writing a first group description for a multi-country filing
A group held local documentation in several countries but nothing describing itself as a whole, and had been asked for the group-level document in one of them. We built it from the group's own records: the ownership chart, the business lines and what drives them, the intangibles and who develops them, the internal financing arrangements and the financial position. Drafting it surfaced conflicting descriptions of one entity's role, which were settled before filing. The engagement produced the group document and a schedule of the local files needing alignment to it.
Correcting a group file that contradicted a subsidiary's local file
The group document described a distributor as bearing no market risk, while the entity's local file tested its results on a basis appropriate to a company that did. Read together, the documents disagreed about what the company was. We went back to the conduct, looking at who set prices, who carried inventory and who absorbed unsold stock, then rewrote whichever document was wrong, which proved to be the group description. The engagement produced a consistent pair of documents for the year and a note of the intercompany agreement needing amendment to match.
Describing an intangibles migration the agreements did not match
A group had moved development of its software to a different entity, but the group document still named the original owner and the intercompany agreements had never been updated. We documented what had actually moved and when, who now performs and controls the development work, and what remained with the original holder, then set the description against the agreements so the gap was visible and could be closed. The engagement produced a revised intangibles section, a list of agreements to be re-papered, and a position on the transfer the local files could be aligned with.
Building the internal financing section from the actual loan terms
A group's file described its financing in general terms while the underlying arrangements included interest-free balances, credit support given by the parent, and a facility drawn by one subsidiary on behalf of another. We listed the arrangements, obtained the terms for each, and described who provides the funding, who bears the risk on it and how the arrangements were priced. The engagement produced a financing section matching the ledgers, and identified balances treated as loans in one country and as equity in another for the group to resolve.
Preparing a group description for an Indian filing obligation
A group with an Indian subsidiary held a group-level document prepared elsewhere and needed it filed on India's own master-file return. We worked through what the Indian return asks for against what the existing document contained, filled the gaps from the group's own records rather than rewriting the narrative, and kept the group description identical to the version filed in other countries. The engagement produced the Indian filing and an updated group document serving both, so the group is not maintaining separate accounts of itself.
Reviewing an inherited group file before reusing it
A group had taken on documentation prepared by a previous adviser and intended to refile it with updated financials. Read closely, it still described a business line that had been sold, omitted an entity incorporated since, and characterised a service company in terms its own agreements no longer supported. We set the document against the current structure, marked what was stale and what was wrong, and rewrote those sections. The engagement produced a group document the current local files can be reconciled to, and an annual review checklist so the same drift does not recur.
An Indian Company Paying a Foreign Supplier
Payments abroad carry deduction at source and a certification filed before the money moves. Whether the treaty reduces the rate depends on what is being bought, and the classification is the decision the whole filing rests on.
Read how this one runsAn Adjustment in One Country and No Relief in the Other
A pricing adjustment taxes the same profit twice unless the other country makes a corresponding one. The mutual agreement route is what produces that relief, and it is opened on a timetable set by the treaty rather than by either revenue authority.
Read how this one runsAll case studies — every published engagement in one place.
Core International & Cross-Border Tax Services
Strategy and compliance for income, assets and families spread across borders.
Industries & Client Types We Serve Worldwide
- Foreign VAT / GST / sales tax registrations
- Marketplace withholding reviews
- Inventory nexus & PE analysis
- Multi-currency books reconciled
- Cross-border revenue sourcing & withholding
- IP structuring with real substance
- Equity for cross-border teams
- U.S. expansion: entity & PE setup
Firms and partners working across borders meet Regulation 105 withholding, PE risk on long engagements and per-country payroll for travelling staff.
A partnership is taxed in the hands of its partners, so one engagement abroad can reach every partner's personal return. The order matters: the waiver is applied for before the invoice, the presence is tracked before it becomes an establishment, and the payroll is registered before the first day worked in the other country.
- Reg 105 / 102 waivers
- Permanent establishment risk
- Partner mobility planning
- Cross-border withholding recovery
- Section 216 rental returns
- FIRPTA withholding recovery
- Section 116 clearance
- Treaty credit optimization
- Transfer pricing documentation (s.247)
- Customs value vs transfer price
- Foreign affiliate reporting (T1134)
- Country-by-country reporting
- Reg 105 & U.S. CWA agreements
- Multi-state & country calendars
- Touring income allocation
- Royalty & image-rights withholding
- Residency analysis before moving
- Employer payroll exposure
- Totalization & social security
- Foreign tax credits
- Treaty access & PPT reviews
- FAPI & surplus computations
- Withholding-efficient routing
- Governance & substance
Master file: further questions
They answer different questions and neither stands in for the other. The local file deals with one entity: its controlled transactions, the functional analysis, the method chosen, the comparables and the results. The master file deals with the group: structure, business drivers, intangibles, internal financing. An administration testing a local entity's margin reads the group description first, to see whether the entity's characterisation is plausible, and then tests the numbers. Filing one without the other leaves either a group narrative with no numbers attached or numbers with no context around them.
In practice the group prepares one document centrally and each local entity files it where it is required. That is the only arrangement that produces consistency, and consistency is the whole value of the thing. Where local entities draft their own versions, each describes the group as it understands it from where it sits, and the descriptions drift apart. The local contribution is a different one: checking that the group's description of the local entity's role matches what that entity actually does, and raising it with the group before submission rather than after a query.
The content is meant to be one description, and keeping it one description is the point. What varies is the form it goes on and what each administration asks for alongside it; India, for instance, collects it on Form 3CEAA. So the sensible approach is a single group document maintained centrally, with local filings drawing from it rather than rewriting it. If a country needs something the group document does not cover, add it to the group document where it belongs instead of creating a local variant, because the variants are what later contradict each other.
Which intangibles the group owns and uses, which entities hold legal title, and separately which entities actually perform and control their development, enhancement, maintenance, protection and exploitation. It should also cover the intercompany agreements attaching to them and any transfers between related parties during the period. This section is read against conduct rather than contracts, so a description naming a legal owner and saying nothing about who does the work invites the enquiry the file exists to head off. Keep it consistent with what the local files say about the same entities.
Review it every year even when the answer is that little has changed, and record that you did. The parts that move quietly are the ones that matter: a new intercompany loan or support undertaking, a change in who holds or develops an intangible, a restructured supply chain, an entity added or wound up. The financial information also needs refreshing. A file describing a structure the group has grown out of is worse than an incomplete one, because the local files will reflect today's arrangements and the contradiction between them is what gets noticed.
Five, in two groups. Three compare transactions: comparable uncontrolled price, resale price, and cost plus. Two compare profits: the transactional net margin method, and profit split. The OECD asks for the most appropriate method on the facts rather than a fixed hierarchy; the United States applies a best-method rule to similar effect. Selection is itself a documented judgment, and a method chosen without recording why is a weak position under audit. See our transfer pricing work.
Not by virtue of it being foreign — there is no exemption for that, and the "keep it offshore" advice you may have read is how people acquire penalties rather than savings. What genuinely reduces the gain is ordinary and legitimate: principal residence relief where the property qualifies and the designation is made correctly, a properly built cost base including acquisition costs and capital improvements, the timing of the disposition, the treaty rules for real property, and credit for the foreign tax paid. See principal residence and foreign property.



