Profit Level Indicators (PLI) Reference: Every Formula, Every Use

A Profit Level Indicator (PLI) is the ratio that separates the tested party’s routine return from everything else in its accounts. Under TNMM — and in practice under most Indian benchmarking — the entire study is a consequence of one decision: which PLI, and on what denominator. This page is the working reference for the standard indicators: the formula, the numerator and denominator discipline, the fact pattern each fits, and the failure mode.

The master table

PLI	Formula	Best fit	Watch out for
Operating Margin (OM)	Operating profit ÷ operating revenue	Distributors, resellers, trading	Revenue definition — includes only operating revenue; related-party revenue contamination in the pool
OP/OC	Operating profit ÷ operating cost	Contract service providers, KPO/BPO, R&D, cost-plus entities	The operating cost definition — the single most contested line in Indian files
Net Cost Plus (NCP)	(Revenue − cost of sales) ÷ operating cost	Contract manufacturers, process service providers	Cost of sales vs operating cost — mixing the two denominators changes the indicator’s meaning
Gross Margin (GM)	(Resale price − purchase cost) ÷ resale price	Limited-risk resellers (RPM/GMM)	Only works where the reseller adds no significant value; blended multi-product margins
Berry Ratio	EBIT ÷ (Revenue − COGS)	Manufacturing, where SG&A is the value driver	Equivalent to an inverse mark-up on value added; unfamiliar to many examiners — explain it in the file
ROA	EBIT ÷ average total assets	Asset-heavy, capital-intensive operations	Average vs year-end assets; asset intensity differences across the pool
ROCE	EBIT ÷ average capital employed	Capital-intensive manufacturers, infrastructure-type functions	Capital employed definition (equity + interest-bearing debt vs total equity + debt); pool asset composition

Operating profit in the numerators is the operating concept: before interest, before tax, and — critically for the denominator — with non-operating income, extraordinary items and prior-period adjustments excluded. A PLI computed on EBIT that includes interest income or one-off gains is not measuring the routine return; it is measuring the routine return plus noise.

The denominator is the method

The same operating profit divided by different denominators tells different stories about the same company:

Company	Operating profit	Revenue	Operating cost	OM (OP/S)	OP/OC
Tested party	60 cr	500 cr	420 cr	12.0%	14.3%
Comparable A	55 cr	520 cr	400 cr	10.6%	13.8%
Comparable B	70 cr	480 cr	450 cr	14.6%	15.6%

On OM the tested party (12.0%) sits comfortably between the comparables. On OP/OC (14.3%) it is close to the bottom of the pair. Both are “correct” arithmetic — but only one PLI matches the tested party’s economics. A company priced on cost (a service provider) earns its return on cost; comparing it on revenue rewards (or punishes) its pass-through cost base, which is not where the profit was made. The PLI must measure the return on the base the business model actually earns on.

Choice rules

1. Follow the pricing basis. Cost-plus priced entity → OP/OC or NCP. Turnover-margin priced entity (distributor) → OM or GM. Capital-intensive entity → ROCE/ROA.
2. Pick the indicator with the least variance across the comparable pool. Compute the candidates on the pool before committing; the PLI that swings wildly between comparable companies is the wrong PLI even if it “fits” the tested party.
3. Use the same PLI, same definitions, for tested party and pool. The operating cost of the tested party and of every comparable must be built from the same line items — a mixed-definition pool is an unscreened pool.
4. Exclude what the function does not bear. If the tested party does not employ significant working capital, a working-capital-sensitive denominator (or the absence of a working capital adjustment) is the point — see the working capital adjustment for when the adjustment is owed to the comparable or the tested party.

PLI substitution in examination

PLI choice is a live examination issue, not a settled one:

• The TPO may substitute the PLI — the file declares OP/OC, the TPO re-runs the pool on OM (or vice versa) and argues the range moves. The defence is the choice rules above, documented in the Local File: the pricing basis, the variance comparison across the pool, and the consistency across years.
• The TPO may attack the denominator — operating cost redefined with or without a material line (employee benefits, depreciation, allocated overheads, extraordinary items). The cost schedule, line by line, is the exhibit that decides it.
• Across years, a PLI change (same company, different indicator) is a red flag: it is usually a range-shopping signal. Change it only on a documented change in the tested party’s function, and say so in the file.

Worked mini-example: Berry ratio

A contract manufacturer: revenue ₹800 cr, cost of sales ₹640 cr, EBIT ₹48 cr.

Berry ratio = EBIT ÷ (Revenue − COGS) = 48 ÷ (800 − 640) = 48 ÷ 160 = 30.0%

The comparable pool (same manufacturing process, comparable contract risk) returns Berry ratios of 24%, 27%, 29%, 31% and 36% — IQR 27%–31%. The tested party’s 30% sits inside. The same company on OM (48/800 = 6.0%) against an OM pool would be a different comparison entirely — the Berry ratio isolates the return on the value the manufacturer actually adds (revenue minus the cost of what it bought), which is why it is the natural indicator where COGS dominates revenue.

See also

• TNMM — the complete guide
• Working capital adjustment
• How to choose a method
• Gross Margin Method in India