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Comparable searches, interquartile ranges, database methodology, and the analytical judgment that separates a defensible study from a well-formatted one
Benchmarking is where transfer pricing earns or loses its credibility. A poorly-constructed comparables search produces a number that looks defensible on paper and falls apart in audit. A well-constructed one is the difference between a clean controversy resolution and a five-figure penalty.
This cluster covers benchmarking methodology in working detail — how to read a study you didn’t write, how to evaluate the interquartile range, when to reject comparables aggressively, and which databases earn their subscription cost. Written for practitioners and for the in-house tax teams who pay them.
Tosin Odunuga,
01 — The pillar article
How to read a benchmarking study you didn’t write.
Most in-house tax teams accept benchmarking studies as black boxes — pages of comparables they don’t have time to scrutinize. This is a mistake. The framework for pressure-testing any study in under an hour, and the seven red flags that should make you push back.
- The black-box problem
- The 60-minute framework
- Method selection: was it analyzed, or assumed?
- Functional analysis: matches the business?
- Search strategy: documented before or after?
- Comparable rejection: principled or post-hoc?
- The interquartile range: conclusion or calculation?
- Seven red flags worth pushing back on
Six pieces, each on one part of the work.
The pillar above is the comprehensive starting point. The articles below go deeper on individual elements — the IQR, comparable rejection, database selection, adjustments, and method selection.
The interquartile range, demystified
The most-cited number in any benchmarking study, and the most-misunderstood. What the IQR actually measures, what it doesn’t, and why landing inside it isn’t sufficient on its own.
Comparable rejection: the case for being more aggressive
Most studies err toward keeping comparables to look defensible. The opposite approach — aggressive rejection with documented reasoning — is often the stronger position. When and why.
When TNMM is the wrong method (and what to use instead)
TNMM is the workhorse of transfer pricing, but it’s also the default chosen when more reliable methods would actually do better. How to recognize the cases where TNMM is the wrong tool.
Scheduled · May 2026 →
Adjusting for working capital, operating expenses, and risk
The three adjustments that turn rough comparables into defensible ones — when each applies, how to calculate them, and the documentation pattern that holds up.
Scheduled · June 2026 →
Benchmarking databases compared: Orbis vs. EdgarStat vs. RoyaltyRange
An honest comparison of the major transfer pricing databases — what each is good for, what they cost, where the differences matter, and how to choose for your practice.
Scheduled · July 2026 →
DIY benchmarking studies: when it’s possible, when it’s not
Most in-house tax teams can do more of their own benchmarking than they think — but not all of it. The specific situations where DIY works, and where outsourcing earns its fee.
Scheduled · August 2026 →
The Benchmarking Study Workpaper Template.
The exact structure I use to build defensible benchmarking studies — search strategy memo, acceptance/rejection matrix, comparability adjustment worksheets, and an interquartile range calculator. Free PDF.
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