Comparability Analysis: 5 Factors, 2 Screens, the Adjustments Rule

Comparability is the question at the centre of transfer pricing: given that no two companies are identical, how much difference can you tolerate before a “comparable” stops being comparable? The OECD’s answer — echoed in Indian practice — is that differences are acceptable unless they would have materially affected the pricing under analysis, and that material differences must be quantified and adjusted for.

The five comparability factors

OECD Chapter II (3.7) lists five dimensions; a defensible analysis addresses all five explicitly:

Factor	What to compare	Typical treatment
Contractual terms	Pricing terms, product quality, payment, warranty, supply conditions	Differences that move the price are adjusted or the comparable is excluded
Functions performed (and resources employed)	The FAR profile — see the functional analysis guide	Drives the search; major differences are exclusion grounds
Market conditions	Market structure, competitive forces, availability of substitutes, regulatory environment, market size	Material market differences → adjustment or exclusion
Economic conditions	Cycle position, inflation, exchange rates, cost differentials between markets	Adjust where quantifiable (country premium, FX)
Size of the market	Market definition and size where scale effects matter	Rarely decisive in Indian TNMM practice; document it anyway

The working test for each difference: would an independent party have priced differently because of it? If yes — adjust (if you can quantify) or exclude (if you can’t). If no — note it and move on. That sentence is the entire discipline.

The two screens

Comparability analysis happens in two passes, and both must be documented separately in the Accept-Reject matrix:

1. Quantitative screening — the mechanical, data-driven pass. Industry classification (NIC/NACE/SIC), financial-year alignment, size bands (turnover, assets), profitability conditions (no persistent losses), related-party revenue/expense thresholds. These filters are fast, repeatable, and — because they are mechanical — the easiest to defend. See quantitative screening for the filter sequence and thresholds.

2. Qualitative screening — the judgment pass. Company-by-company review of business description, product mix, asset intensity, ownership of intangibles, customer concentration, and anything the data cannot show. This is where the FAR profile is enforced against each comparable, and where the functional analysis pays for itself. AI-assisted screening (as in Quartyl) compresses this pass but does not remove it: every accept/reject still needs a human-verified, documented reason.

Adjust vs exclude: the decision rule

When a difference is material, you have exactly two defensible moves:

1. Adjust. Quantify the pricing effect of the difference and restate the comparable’s result. Working-capital adjustments, country-risk premiums, FX restatements, and extraordinary-item restatements are the standard adjustment types. The adjustment must be consistent in method and rate across the pool and documented to the working-paper level — see working capital adjustments and extraordinary events.
2. Exclude. Reject the comparable with a documented reason. Exclusion is the right call when the difference cannot be reliably quantified, or when the company is functionally different (a full-risk distributor in a limited-risk pool, a manufacturer in a services pool).

The common failure is the third, undefended option: adjusting some companies and excluding others for the same kind of difference without a stated principle. A TPO reading the matrix will see that as a range manufactured to fit. State the principle once (“we exclude where the difference is not quantifiable; we adjust where it is”), then apply it uniformly.

What survives TPO review

• The search is reproducible. A reviewer can re-run your quantitative screens and get the same pool. Keep the exact filters, thresholds and data vintage in the working papers.
• Every rejection has a reason written at screening time. Reasons drafted during assessment are treated as reconstruction; reasons written when the exception was fresh are treated as evidence.
• Adjustments are arithmetic, not opinion. Formula, inputs, rate, and direction for each company. An adjustment that moves a company in and out of the range is a red flag that the company should have been excluded instead.
• The FAR narrative and the P&L behaviour agree. The two most commonly cross-checked items in TPO proceedings.

Where this fits in the study

Comparability analysis is not a chapter — it is the spine of the whole study: it defines the search (FAR → NIC code → screens), it produces the pool (quantitative → qualitative → adjustments), and it feeds the range (surviving comparables → PLI values → IQR). The benchmarking pillar guide walks the full sequence; this page is the rulebook each step applies.