OECD Comparability: The Five Factors and the Two Screens
Chapter 3 of the OECD Guidelines: the five comparability factors at 3.7, their practical weighting at 3.30-3.31, and the adjust-versus-exclude decision for every difference.
Chapter 3 of the OECD Guidelines is where the arm’s length standard is tested against the facts. It fixes the comparability factors, the search and selection of comparables, the quantitative screens, and the adjustments that close measured differences. Two anchors carry most of its practical weight: 3.7, the five comparability factors, and 3.30-3.31, the adjust-versus-exclude decision that runs through every Accept-Reject call.
The chapter at a glance
| Subject | What it covers |
|---|---|
| The five factors | The characteristics to be compared between the controlled transaction and the uncontrolled reference — 3.7 |
| Search and selection | How the comparable set is found, narrowed and defended before any number is calculated |
| Quantitative screens | The financial-data cuts that remove entities whose results cannot carry the benchmark |
| 3.30-3.31 | The decision on every difference: adjust where it can be measured reliably, exclude where it cannot |
3.7 — the five comparability factors
In paraphrase, the provision directs the analyst to compare five characteristics between the controlled and uncontrolled transactions:
| Factor | What it asks |
|---|---|
| Product or service | Are the goods or services materially the same, and are the differences priced in the market? |
| Functions performed | Including the assets employed and the risks assumed — the FAR profile behind the price |
| Contractual terms | Do the agreed terms (warranty, payment, supply continuity, scope) change the economic outcome? |
| Economic conditions | The market in which the activities take place: its size and structure, the regulatory and competitive environment |
| Business strategies | The strategy pursued, where it is a material driver of the difference |
The factors are not a checklist of equal weight. In practice they are applied as two screens on the comparable set:
- The qualitative screen — product, functions, contractual terms, economic conditions and strategy, applied entity by entity, to decide whether a candidate is comparable at all.
- The quantitative screen — the financial-data cuts (size, profitability, outliers) that narrow the survivors to a statistically usable set.
See qualitative screening and quantitative screening for how each screen is run in a study.
3.30-3.31 — adjust or exclude
In paraphrase, the rule is: where a difference between the controlled transaction and the uncontrolled reference is material but can be adjusted with a reliable degree of precision, adjust; where it cannot, exclude the reference. Three consequences follow.
- Adjustments are for measured, reliable differences — working capital, timing, intangibles of a known effect — not for unmeasurable ones. The adjustment provisions are what make a difference a problem to solve rather than a reason to give up. See comparability adjustments.
- Exclusion is the honest answer for unmeasurable differences. A comparable that carries a material, unquantified difference is worse than no comparable: it looks like data and behaves like noise.
- The decision is documented either way. Accept or Reject, the file must show the test was applied — which is what the documentation tier requires.
The practical weighting
Not every factor moves the price in every industry. The practical weighting follows the function: for a manufacturer the product and the cost structure carry the comparison; for a service provider the scope of the service and the economic conditions of the destination market carry it; for a distributor the market structure and the competitive environment do. The comparability analysis guide shows the same factors applied in an Indian study context.
What it means in practice
The reader’s map maps Chapter 3 onto Indian law directly:
| OECD concept | Indian provision |
|---|---|
| Comparability (Ch. 3) | Rule 10D items 9-10, TPO practice |
In an Indian proceeding the factors at 3.7 are the checklist the TPO runs against the accepted set, and 3.30-3.31 is the standard for every exclusion the taxpayer wants to keep in or push out. A defensible set is one where each survivor passes the qualitative screen and each excluded candidate has a recorded, factor-specific reason.
Where this takes you
- The factors in practice: comparability analysis.
- The adjustments the provisions authorise: comparability adjustments.
- The method the factors select between: OECD method selection.
- The set the screens produce: building the range.
Run the screens as a study, not a spreadsheet
Quartyl applies the method, PLI and screening steps above as a pipeline — and keeps a documented reason for every exclusion.
Related docs
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