Do I need TP audit defence file?

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Answer

Assembling it before an audit means the response is a document delivery rather than a reconstruction. The requirement usually turns on whether a transaction happened at all, not on how large it was.

Whether you need it

Assembling it before an audit means the response is a document delivery rather than a reconstruction. The file also identifies the weak points in advance, which is what makes a settlement position realistic.

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The carve-out

A defence file is not the documentation report. It is the evidence behind it — the emails, time records, board minutes and invoices that show the conduct matched the policy.

Do I need TP audit defence file?
ItemAmount
RevenueC$9,000,000
Operating margin reported1%
Operating profit reportedC$90,000
Assumed tested range4% – 6%
Profit at the bottom of the rangeC$360,000
Potential adjustmentC$270,000

A margin below the range invites an adjustment of C$270,000 in this jurisdiction — and unless the other country makes a corresponding adjustment, that profit is taxed twice. The documentation is what turns this into a conversation rather than an assessment.

An illustration, not a client file. The sums are chosen for legibility and the thresholds are stated for the example alone — nothing reaches a filing until it has been confirmed at source for your own year.

What to do next

The full treatment — who it binds, the deadline, the penalty and the fixed fee — is on TP audit defence file. We would rather scope it properly than quote it quickly.

Read and approved for the 2025 and 2026 filing seasons by Udit Gupta, Cross-Border Tax Expert, Legal Quotient Consultants. General guidance only. Your own facts decide the answer, so bring them to a call before relying on this.

Where international tax audit comes into this file

This is the page to read on international tax audit. It takes TP audit defence file in order — the test that decides who is affected, the returns and forms that follow from it, and a fee quoted in writing before anything starts.

Cross-border situations we are engaged for

Case study 1

Reconstructing four years of evidence after the enquiry letter arrived

A group received a transfer pricing enquiry covering several years and had the documentation reports but nothing behind them. The staff who ran the service arrangement in the earliest year had left. We rebuilt what we could from payroll allocations, project systems, intercompany invoices and archived mailboxes, and we recorded honestly which parts of the arrangement could not be evidenced. The engagement produced a year-by-year file, a schedule of gaps and, for the weakest year, a settlement position the group set itself rather than received.

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Case study 2

Assembling the file in the quiet year before anything was asked

A group with growing intercompany charges asked us to prepare for an enquiry that had not happened. We worked through each charge, collected the agreements, invoices, time records and minutes for the current year, and set up a folder structure by year and by transaction that the finance team maintains as the documents arise. The engagement produced a complete file for the year in question and a routine for keeping it, so a later request can be met with a delivery of documents rather than an internal investigation.

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Case study 3

A management charge with an agreement nobody had ever varied

The intercompany agreement described a set of head office services. The evidence showed the parent had stopped providing two of them and started providing another. The policy and the conduct had drifted apart quietly over years. We documented what was actually being performed, re-papered the arrangement to match it, corrected the basis on which the charge was raised going forward and kept a record of when each change in function occurred. The engagement produced an agreement the invoices follow and a written history of the drift for the open years.

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Case study 4

Time records that turned a service charge into a supportable one

A group charged an overseas affiliate for engineering support on an estimated basis, with nothing showing who did the work. We put a light activity-recording routine into the team responsible, mapped its output to the intercompany charge and tested a sample of months against the invoices. Within a year the charge was supported by records created at the time rather than by an annual estimate. The engagement produced the recording routine, a reconciliation from activity to invoice, and the first year of evidence a reviewer can sample.

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Case study 5

Board minutes that explained an intercompany funding decision

An intercompany loan carried terms the group could describe but not evidence. Nobody had minuted the decision or the reasoning behind the terms. We gathered the surviving material — the correspondence, the cash-flow analysis put to management at the time, the entries in the accounts — and prepared a contemporaneous record for the current arrangement going forward, including the decision, the alternatives considered and who approved it. The engagement produced an evidenced position for the live loan and a candid note of what the earlier years can and cannot support.

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Case study 6

Finding the weak point before the auditor did

Assembling a file across three transactions, we found two well supported and one that could not be evidenced at all: a charge for a function the affiliate appeared to perform for itself. The group had been prepared to defend all three. We advised it to concentrate on the two and to resolve the third by correcting the charge. The engagement produced a file that is strong where it claims to be strong, and a realistic view of what the remaining item would cost to settle rather than to argue.

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Case study 7

A Residency Determination Review After Leaving the Country

Residence is decided on ties, not on a form, and the review asks for evidence of every one of them. The file assembles the ties that were severed and the ones that remained, and answers the questionnaire against the treaty rather than around it.

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Case study 8

An IRS Notice for a Year the Client Believed Was Settled

Most notices are proposals rather than assessments, and they carry a response window that is shorter than it looks. The engagement reads what is actually being proposed, gathers the support, and replies inside the window with the position rather than a request for time.

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All case studies — every published engagement in one place.

Core International & Cross-Border Tax Services

International Tax Planning & Advisory

Strategy and compliance for income, assets and families spread across borders.

One coordinating team: filings on every side of the border are sequenced so treaty relief and foreign tax credits are claimed once — and in the right country.

U.S. & Cross-Border Tax Returns

Dual filers: U.S. citizens in Canada and Canadians with U.S. income run two parallel systems — we prepare both, in the right order, every year.

Expat & Emigration Tax

The move year is its own project: the elections and valuations filed that year decide the next decade of both countries’ returns.

Non-Resident Canadian Tax

Default withholding is 25% of gross: elective returns routinely turn over-withheld rent and pensions into refunds.

Transfer Pricing & BEPS

Documentation prepared with the return is the cheapest insurance in international tax; reconstructing it during an audit is the most expensive.

Cross-Border Estates & Trusts

Wills drafted for one country routinely misfire in the other — deemed disposition here, estate tax there, credits in between.

Cross-Border Corporate Tax

Expansion raises the same four questions every time — entity, PE, repatriation, payroll. We answer them before the tax authorities do.

India Tax for NRIs & Returning Residents

The deduction is taken on the sale price, not the gain — which is why an NRI property sale strands cash unless the certificate is applied for before closing.

Canadian Tax with a Foreign Element

Residency is decided on facts, not on a form — and the year you arrive or leave is the one where the largest amounts turn on the smallest details.

UAE Tax for Expats & Their Home Country

A zero-tax country is only half the answer — the question that decides the bill is whether the country you came from still treats you as resident.

Industries & Client Types We Serve Worldwide

Global E-commerce & Marketplaces
Technology & SaaS
Professional Services Firms
Cross-Border Real Estate
Importers, Exporters & Manufacturers
Athletes, Artists & Entertainers
Remote Workers & Digital Nomads
Investment Funds & Holding Companies

Global E-commerce & Marketplaces

  • Foreign VAT / GST / sales tax registrations
  • Marketplace withholding reviews
  • Inventory nexus & PE analysis
  • Multi-currency books reconciled
Explore E-commerce & Marketplaces

Technology & SaaS

  • Cross-border revenue sourcing & withholding
  • IP structuring with real substance
  • Equity for cross-border teams
  • U.S. expansion: entity & PE setup
Explore Technology & SaaS

Professional Services Firms

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
Explore Professional Services

Importers, Exporters & Manufacturers

  • Transfer pricing documentation (s.247)
  • Customs value vs transfer price
  • Foreign affiliate reporting (T1134)
  • Country-by-country reporting
Explore Trade & Manufacturing

Athletes, Artists & Entertainers

  • Reg 105 & U.S. CWA agreements
  • Multi-state & country calendars
  • Touring income allocation
  • Royalty & image-rights withholding
Explore Athletes & Entertainers

Remote Workers & Digital Nomads

  • Residency analysis before moving
  • Employer payroll exposure
  • Totalization & social security
  • Foreign tax credits
Explore Remote Workers

Investment Funds & Holding Companies

  • Treaty access & PPT reviews
  • FAPI & surplus computations
  • Withholding-efficient routing
  • Governance & substance
Explore Funds & Holdcos

TP audit defence file — the questions that follow

What is the difference between a defence file and my transfer pricing report?

The report states the position. The file is the evidence behind it. A documentation report explains the method, the comparables and the conclusion; a defence file holds the emails, the time records, the board minutes and the invoices that show the conduct actually matched the policy the report describes. Auditors rarely dispute that a report exists. They ask whether the business ran the way it says. That question is answered out of the file, and if the file was never assembled, it is answered by whatever the group can find under time pressure.

An auditor has asked for our transfer pricing records, so what do they want?

Beyond the report itself, they want the material that corroborates it. Who did the work, where those people sat, what they were paid for, what was agreed and when, whether the invoices follow the agreement, whether the agreement follows what anyone actually did. If the file exists, answering is a document delivery. If it does not, it becomes a reconstruction carried out against a deadline, usually by people who were not there at the time, and the gaps found in that exercise are the same gaps the auditor will find.

How do I prove that we followed our own transfer pricing policy?

With records created at the time, not explanations written afterwards. A cost-plus service charge is supported by time records and a description of what the staff did. An intercompany loan is supported by the minutes of the decision and the evidence of the terms being observed. A distribution margin is supported by the pricing decisions and the correspondence around them. None of this is exotic material; it is ordinary business documentation that becomes hard to obtain once the people have moved on and the systems have been replaced.

Should I build the defence file before an audit or wait to be asked?

Before, for two reasons that have nothing to do with being tidy. First, the response to an enquiry becomes a delivery of documents rather than an investigation into your own past, which changes both the cost and the tone. Second, assembling the file tells you where your position is weak while you can still do something about it — re-paper an arrangement, correct an invoicing basis, or decide what a realistic settlement looks like. A weak point you have already identified is a negotiating position. Found by an auditor, it is a finding.

What records should we be keeping for intercompany charges?

Keep what shows the conduct, not just the conclusion. The intercompany agreements and any variations, the invoices and the basis on which they were calculated, time or activity records for services, board and management minutes for decisions such as funding or a change of function, and the correspondence in which the commercial terms were discussed. Keep them against the year they belong to, so that a later request can be answered by year. The habit matters more than the volume: material collected as it arises is material you still have.

What do I do if the file shows our policy was not followed?

Deal with it while it is still your own discovery. The usual findings are mundane: invoices raised on a superseded basis, a function moved without the agreement changing, a charge nobody can evidence. Each has a response — correcting the intercompany accounts, re-papering the arrangement to match what is actually done, or dropping a charge that cannot be supported. Doing that before an enquiry converts a contested adjustment into a corrected position. It also lets you judge what a settlement should look like, rather than reacting to a number someone else has put on the table.

What is a double tax treaty and what does it actually do?

It is an agreement between two countries that divides up the right to tax. Article by article it decides which country taxes employment income, dividends, interest, royalties, pensions, property and business profits — and where both may tax, it caps what the source country can withhold and tells the other to give credit. It also breaks residence ties and opens a government-to-government channel for disputes. What it never does is apply itself: a treaty position is claimed. See our treaty work.

What is a totalization agreement and how do I use one?

A social security agreement that stops you contributing to two systems for the same work, and lets periods in both count towards benefit eligibility in either. Which system you stay in depends on the agreement's rules for your situation — a seconded employee usually remains in the home system for a set period, a locally hired one usually joins the host system. You evidence it with a certificate of coverage obtained before or shortly after the assignment starts. See certificates of coverage.

Our practitioners are alumni of leading accounting and tax institutions

Where our partners studied — CPA Canada (In-Depth Tax Program), AICPA, the Institute of Chartered Accountants of India and the Malaysian Institute of Accountants.

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