Published June 20, 2025Updated March 11, 202617 min read
Profit Level Indicator Selection: How to Choose the Right PLI for Your Benchmarking StudyProfit Level Indicator Selection: How to Choose the Right PLI for Your Benchmarking Study
The right PLI depends on what drives profitability in your transaction. This guide explains when to use Operating Margin, Net Cost Plus, Berry Ratio, ROA, or ROOA—with formulas, decision trees, and jurisdictional guidance.
Borys UlanenkoCEO of ArmsLength AI
17min read
Contents↓
Contents
TL;DR key takeaways
Match your PLI to the tested party's value driver: revenue (Operating Margin), costs (Net Cost Plus), or assets (ROA/ROOA).
Berry Ratio is appropriate only in limited cases—typically where the tested party's value is reflected in operating expenses, its return is not materially driven by product value or sales, and it performs no other significant functions requiring a different reward. Document the OECD conditions carefully.
OECD doesn't prescribe a single preferred PLI; selection depends on which indicator provides the most reliable measure in your specific circumstances.
Operating margin is the most common PLI in recent U.S. APA practice—used 72% of the time for covered tangible/intangible CPM/TNMM cases in the IRS's 2024 APA report.
Your denominator definition often matters more than the PLI name—document what goes into OPEX, COGS, and operating assets clearly.
We tested three AI configurations on 10 transfer pricing questions. ChatGPT with web search scored 83%, but models without web access fabricated most quotes. Here's what we learned.
The Berry Ratio (gross profit ÷ operating expenses) is a specialized PLI for low-risk distributors and agents. Learn when it's appropriate, when to avoid it, and how to defend your analysis—with calculation examples and jurisdictional guidance.
On November 10, 2025, HMRC updated INTM485120 with critical details on searching for comparables. The key takeaway? The Interquartile Range is not a default right - and relying on it blindly carries a median-sized risk.
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The right Profit Level Indicator depends on what drives profitability in your tested party's transaction:
Operating Margin (OM) → For revenue-driven businesses (distributors, service providers, sales entities)
Net Cost Plus (NCP) → For cost-driven operations (contract manufacturers, R&D services, shared services)
Berry Ratio → For limited cases where the tested party's value is reflected in operating expenses and its return is not materially driven by product value or sales—but only when OECD conditions are met
Return on Assets (ROA/ROOA) → For asset-intensive businesses where capital employed drives returns
OECD Guidelines emphasize that the selection of the most appropriate net profit indicator should take account of the facts and circumstances of the case, in particular through a functional analysis (). Always match the PLI to what drives the tested party's profitability.
What is a Profit Level Indicator?
A Profit Level Indicator (PLI) is the ratio used to measure profitability in a TNMM or CPM benchmarking analysis. The PLI you choose determines how you'll compare your tested party's results against independent companies.
US Treasury Regulations §1.482-5(b)(4) defines PLIs as "ratios that measure relationships between profits and costs incurred or resources employed." The key insight is that different PLIs capture different aspects of what makes a business profitable—and the right choice depends on your tested party's economic substance.
Note
The PLI must match the tested party's value driver. A distributor earning returns on sales volume needs a different PLI than a manufacturer earning returns on production costs or assets employed.
The Five Main PLIs Explained
1. Operating Margin (OM)
Formula: Operating Margin = Operating Profit ÷ Net Revenue
Operating Margin measures profitability as a percentage of sales. It is widely used in practice and is the most common PLI in recent U.S. APA statistics—used 72% of the time for covered tangible/intangible CPM/TNMM cases in the IRS's 2024 APA report.
Best For:
Full-fledged and limited-risk distributors
Service providers with revenue-based pricing
Sales agents and marketing entities
Any entity where sales volume is the primary value driver
Advantages:
Financial data widely available
Easy to calculate and understand
Intuitive interpretation for auditors
Broad acceptance across many jurisdictions, subject to the facts and local administrative practice
Limitations:
Sensitive to revenue fluctuations and pricing strategy
May not capture asset-intensive operations well
Pass-through revenue can distort results (agency/commissionaire arrangements)
Typical Application: A European distribution subsidiary buys products from its US parent and resells to third-party customers. Its value comes from sales execution—customer relationships, logistics, and market knowledge. Operating margin captures whether its return on sales is arm's length.
2. Net Cost Plus (NCP) / Return on Total Costs
Formula: Net Cost Plus = Operating Profit ÷ Total Costs = Operating Profit ÷ (COGS + Operating Expenses)
Net Cost Plus (also called Full Cost Plus or Return on Total Costs) measures the markup earned on the total cost base. It's the standard PLI for cost-driven operations.
Warning
Markup vs. Margin Confusion: NCP is a markup on costs (OP ÷ Costs), not a margin (OP ÷ Sales). China SAT Notice No. 6 explicitly labels this "full cost mark-up" with EBIT divided by full cost. Don't confuse the two.
Best For:
Contract manufacturers
Toll manufacturers
R&D service providers
Shared service centers
Any entity where cost efficiency is the value driver
Advantages:
Appropriate when the tested party's value comes from cost control
Less affected by pricing strategy variations
Works well for cost-plus service arrangements
Limitations:
Requires accurate cost allocation and segmentation
Pass-through costs must be identified and treated consistently
Affected by accounting treatment differences
Cost Base Design Matters: If subcontracted costs are pure pass-through (no value added by the tested party), including them in the denominator mechanically depresses the NCP. Define your cost base clearly and be consistent with comparables.
3. Berry Ratio
Formula: Berry Ratio = Gross Profit ÷ Operating Expenses
The Berry Ratio is named after Professor Charles Berry, who used the ratio as an expert witness in E.I. DuPont de Nemours & Co. v. United States (1979). It measures gross profit relative to operating expenses and is designed for situations where operating expenses—not revenue or assets—drive the tested party's value.
Note
Denominator Definition: China SAT Notice No. 6 defines the Berry ratio denominator as "Operating Expenses + G&A." The key is that COGS is excluded—the denominator captures value-adding activities, while COGS is assumed to be pass-through.
When Berry Ratio is Appropriate ():
The tested party's value-add is captured in operating expenses
COGS is largely pass-through (the tested party doesn't add significant value to the goods themselves)
No significant intangibles or risks beyond routine activities
The tested party isn't performing additional functions that warrant a different return
When Berry Ratio is NOT Appropriate:
The tested party bears meaningful inventory risk or pricing risk
COGS includes value-adding activities (manufacturing, processing)
Operating expenses don't capture the full scope of value creation
The comparable set has inconsistent cost classifications
The Classification Sensitivity Problem:
Berry ratio is "very sensitive" to cost classification, as the UN Practical Manual warns. Consider this example:
Firm
COGS
OPEX
Gross Profit
Berry Ratio
Firm A
850
120
150
1.25
Firm B (same economics, 40 reclassified from OPEX to COGS)
890
80
110
1.375
Same operating profit, same economics—different Berry ratio solely due to accounting classification. This is why Berry disputes are common in jurisdictions like India.
Warning
Audit Risk: Berry ratio is accepted in the US and under OECD Guidelines (with conditions), but it is heavily litigated in India. If you use Berry, document explicitly how are satisfied.
4. Return on Assets (ROA)
Asset-based PLIs are jurisdiction-sensitive. Under OECD guidance, where profit is weighted to assets, operating assets only should generally be used—defined as operating fixed assets, operating intangibles, inventory, and receivables less payables (). Some local rules use broader formulations; for example, China SAT Notice No. 6 defines ROA as EBIT divided by average total assets: (opening balance + closing balance) ÷ 2.
Best For:
Asset-intensive manufacturers
Warehousing and logistics operations
Distributors with significant inventory and warehousing facilities
Any entity where capital investment drives returns
Advantages:
Captures asset intensity that other PLIs miss
Appropriate when returns should relate to capital employed
Useful when comparables vary significantly in asset intensity
Limitations:
Affected by depreciation policies (straight-line vs. accelerated)
High audit risk if balance sheets aren't comparable across accounting standards
How to Select the Appropriate Profit Level Indicator (6 Steps)
PLI selection is not a “preference” question—it’s a reliability question. A defensible workflow is:
Start with functional analysis (FAR) — What functions are performed, what assets are used, and what risks are assumed?
Identify the tested party — Typically the less complex entity without unique intangibles.
Identify the value driver — Is compensation primarily tied to sales execution, cost efficiency, OPEX-driven intermediation, or capital employed?
Check denominator independence () — The base should not be the very controlled amount you are testing. For example, in a buy-sell distributor case, OECD says you generally should not weight TNMM profit against COGS where those purchase costs are the controlled costs under examination.
Check data availability and definition risk — Can you calculate the PLI reliably for both tested party and comparables with consistent accounting mappings (COGS vs OPEX vs operating assets)?
Select the most reliable PLI and document “why not the alternatives” — If two PLIs are plausible, pick the one with better data reliability and explain why the other would be less reliable in your facts.
Tip
Practical rule: Sales-driven → OM. Cost-driven → NCP. Asset-driven → ROA/ROOA. OPEX-driven pass-through intermediation → Berry (only if OECD conditions are met).
PLI Selection by Transaction Type
Use this decision matrix as a starting point, then validate against your specific facts and circumstances:
Transaction Type
Primary PLI
Alternative
Rationale
Limited-risk distributor
Operating Margin
Berry Ratio
OM aligns to sales-based return; Berry only if OPEX is the true value driver
Full-fledged distributor
Operating Margin
ROA/ROOA
Inventory and working capital may justify asset-based PLI
Commissionaire / agent
NCP or Berry
Operating Margin
Revenue often not comparable across structures; cost-based focus more stable
Contract manufacturer
Net Cost Plus
ROA/ROOA
Cost efficiency is value driver; asset-based if intensity varies materially
Toll manufacturer
Net Cost Plus
-
Define cost base carefully (conversion costs vs. total if materials are pass-through)
Routine service provider
Net Cost Plus
Operating Margin
UN Manual explicitly notes services often fit profit-to-costs PLI
R&D service provider
Net Cost Plus
-
Tight cost base definition critical; exclude pass-through subcontracting
Shared services center
Net Cost Plus
-
Standard cost recovery with markup
Asset-intensive manufacturer
ROA/ROOA
NCP
Significant capital employed justifies asset-based PLI
Tip
The Decision Rule: Ask "What does this entity get paid for?" If it's sales execution → OM. If it's cost efficiency → NCP. If it's capital deployment → ROA. If it's low-risk intermediation with value in OPEX → Berry (maybe).
Jurisdictional Preferences
Tax authorities have different "comfort zones" for PLI selection. Understanding these preferences helps you anticipate audit questions.
United States (IRS)
Primary Method: CPM under §1.482-5
Common PLIs: Operating margin (72% of covered tangible/intangible CPM/TNMM cases per the IRS 2024 APA report), Berry ratio and markup on total costs for the remaining 28%
Guidance: §1.482-5(d) provides detailed definitions for sales revenue, gross profit, operating expenses, and operating profit
Berry Acceptance: Explicitly recognized; IRS practice units include Berry formula examples
Key Rule: Non-operating items are generally excluded per ; points to OECD ¶2.92+ for denominator selection
Preference: Operating margin commonly used; OECD-aligned approach to PLI selection
United Kingdom (HMRC)
Key Warning: HMRC criticizes TNMM applications "based on little more than a list of supposedly comparable companies" (INTM421080)
Best Practice: Start with internal comparable net margin first, then external if unavailable
Acceptance: TNMM widely used, but justify your PLI choice clearly
India
Legal Basis: Rule 10B(1)(e) permits net profit margin relative to costs, sales, assets, or "other relevant base"
Range: Rule 10CA uses 35th-65th percentile (narrower than OECD IQR)
Berry Ratio: Accepted but frequently challenged by TPOs—denominator logic and cost classification are heavily litigated
China (SAT)
Guidance: SAT Public Notice [2017] No. 6, Article 20 explicitly lists acceptable PLIs with official formulas
Recognized PLIs: Operating margin, full cost mark-up, ROA, Berry ratio
Key Principle: "The profit level indicator selected should reflect the functions performed, risks assumed and assets used"
Practical Examples
Example 1: Same Distributor, OM vs Berry Give Different Answers
Facts:
Sales: 1,000
COGS: 850
Gross Profit: 150
Operating Expenses: 120
Operating Profit: 30
PLI Results:
PLI
Calculation
Result
Operating Margin
30 ÷ 1,000
3.0%
Berry Ratio
150 ÷ 120
1.25
Comparable Ranges (illustrative):
Operating Margin: 1.5% – 3.5% → Tested party (3.0%) is in range
Berry Ratio: 1.35 – 1.55 → Tested party (1.25) is below range
Interpretation: If COGS isn't truly pass-through (the distributor bears inventory risk, pricing risk, or adds value to products), Operating Margin may be the appropriate PLI. Berry ratio could wrongly "penalize" the high COGS intensity.
Example 2: Contract Manufacturer—NCP vs ROA Diverge
Tested Party:
Operating Profit: 20
Total Costs: 400
Total Assets: 300
PLI Results:
PLI
Calculation
Result
Net Cost Plus
20 ÷ 400
5.0%
ROA
20 ÷ 300
6.67%
Comparable Analysis:
Comparable A (asset-light): NCP 5.0%, ROA 10.0%
Comparable B (asset-heavy): NCP 5.0%, ROA 5.5%
Takeaway: If your comparables vary in asset intensity, NCP can "hide" major differences. ROA may align better with value driver when assets are material to the business model.
Example 3: Routine Service Provider—Net Cost Plus and Pass-Through Costs
Pass-through subcontractors billed at cost (no value-add): 120
Two denominator choices (why definition matters):
NCP denominator
Calculation
Result
Value-adding cost base only
12 ÷ 180
6.67%
Total costs incl. pass-through
12 ÷ (180 + 120)
4.00%
Takeaway: For NCP, your cost base definition often drives the result. If subcontractor costs are pure pass-through, including them can mechanically depress the markup. Whichever approach you choose, apply it consistently to both tested party and comparables and document the rationale.
Example 4: Intermediary / Agent—When Berry Ratio is the Better Fit
Facts (tested party):
Sales: 1,000 (high pass-through)
COGS: 920 (pass-through purchases)
Gross Profit: 80
Operating Expenses (value-add OPEX): 60
Operating Profit: 20
PLI results:
PLI
Calculation
Result
Operating Margin
20 ÷ 1,000
2.0%
Berry Ratio
80 ÷ 60
1.33
Interpretation: If the entity's value-add is mainly in operating expenses (sourcing, coordination, order management) and COGS is genuinely pass-through, Berry can be more diagnostic than OM. But because Berry is sensitive to cost classification, document how conditions are satisfied and show consistent COGS/OPEX mapping in comparables.
Defending PLI Selection in Tax Audits
Tax authorities typically challenge PLI selection on coherence (does the PLI match the FAR and value driver?) and reliability (is it computed consistently and comparably across parties?).
What to document (audit-ready):
Value driver narrative tied to functional analysis (why sales vs costs vs assets vs OPEX is the right base)
PLI definition memo (what you included/excluded in operating profit, COGS, OPEX, operating assets; and why)
Why alternatives are less reliable (data limitations, definition volatility, accounting classification sensitivity)
Consistency proof: same PLI and same definitions for tested party and all comparables
Sensitivity checks: show how conclusions change if you switch PLI or adjust the denominator definition (and why your choice is still most reliable)
Warning
If your analysis “works” only under one convenient denominator mapping (or only by switching PLIs midstream), expect audit scrutiny. The fix is not to hide the issue—it’s to document why your chosen PLI is the most reliable measure for the transaction.
Common PLI Selection Mistakes
Using the "industry standard" without analysis — There's no universal "right" PLI for an industry. Match it to your tested party's specific facts.
Ignoring denominator definition — Your accounting mapping memo (what counts as OPEX vs. COGS vs. operating assets) often matters more than the PLI name.
Selecting Berry ratio without meeting conditions — If COGS isn't pass-through, Berry will produce unreliable results. Document how conditions are satisfied.
Inconsistent PLI between tested party and comparables — The same PLI and same definitions must apply to both.
Switching PLIs mid-analysis — If working capital differences affect OM, make adjustments rather than switching to a different PLI.
What profit level indicator should I use for a limited-risk distributor?
For limited-risk distributors, Operating Margin is the standard choice because sales volume drives the entity's value. However, if the distributor truly has pass-through COGS (no inventory risk, no pricing risk), Berry Ratio may be appropriate—but only if you can demonstrate that operating expenses capture the value-add and are satisfied. Document your reasoning carefully; Berry ratio selection is frequently challenged.
When is Berry Ratio actually appropriate?
Berry Ratio is appropriate only in limited cases, typically where: (1) the tested party's value is reflected in operating expenses, (2) its return is not materially driven by product value or sales, (3) it performs no other significant functions requiring a different reward, and (4) the comparable set has consistent cost classifications between COGS and OPEX. Pass-through COGS often points in this direction, but is not by itself the full OECD test. These conditions are grounded in , especially ¶2.107.
How do I choose between Operating Margin and Net Cost Plus?
Ask: "What does the tested party get paid for?" If the entity earns returns based on sales execution (volume, customer relationships, market access), use Operating Margin. If it earns returns based on cost efficiency and delivering services/products at a markup on effort, use Net Cost Plus. For many distributors, OM is appropriate; for most contract manufacturers and service providers, NCP is preferred.
What exactly counts as "operating profit" for PLI calculation?
Operating profit should reflect profits from ordinary operating activities—typically EBIT (Earnings Before Interest and Taxes). states that "non-operating items such as interest income and expenses and income taxes should be excluded from the determination of the net profit indicator." Exclude interest income/expense, investment income, and extraordinary items. Foreign exchange gains and losses require a facts-and-circumstances analysis: OECD notes that the treatment depends on whether the FX items are trading in nature, whether the tested party bears the FX risk, whether the exposure is hedged, and whether the items are treated consistently in both the tested party and comparables. Be consistent and document any inclusions/exclusions.
Can I use different PLIs for different comparables?
For a single TNMM/CPM benchmark set, the tested party and comparables should be evaluated using the same PLI and consistent definitions. Different transactions or separately segmented analyses may justify different PLIs, but you should not mix PLIs within one comparable set. If some comparables don't have data for your chosen PLI, exclude them rather than mixing PLIs.
How do I handle pass-through costs in a Net Cost Plus analysis?
Pass-through costs (where the tested party adds no value—just passes costs through at no markup) should be excluded from the cost base denominator, or included only if comparables treat them the same way. If you include pass-through subcontracting costs in "total costs," it mechanically depresses your NCP result. Define your cost base clearly and document the treatment.
What if my PLI analysis gives different results than another PLI?
This is common and expected—different PLIs measure different things. The question is which PLI best reflects the tested party's value driver. If OM shows the tested party in range but Berry shows it below range, you need to determine whether revenue or operating expenses is the true value driver. Document your analysis and explain why your chosen PLI is most reliable for the specific transaction.
How do tax authorities view ROA vs. ROOA?
Both are accepted, but ROA is more commonly used because data is more widely available. Use ROOA when the tested party has significant non-operating assets (excess cash, financial investments) that would distort a straight ROA comparison. ROOA requires clean operating asset mapping, which increases documentation burden but may produce more reliable results for capital-intensive operations.
Should I use a 3-year rolling average for PLI calculations?
OECD says multiple-year data is often useful where it adds value to the comparability analysis, but it is not a systematic requirement and does not necessarily imply multi-year averaging (). Three-year rolling averages are common in some APA structures and domestic practice, but they are not an OECD default rule. A typical formula when used is: (OP₁ + OP₂ + OP₃) ÷ (Revenue₁ + Revenue₂ + Revenue₃) for Operating Margin, or the equivalent for your chosen PLI.
How do I defend my PLI choice in an audit?
Document three things: (1) What drives profitability for the tested party—link to your functional analysis; (2) Why this PLI is most reliable—reference and explain why other PLIs would be less appropriate; (3) How you applied it consistently—show the same definitions and formulas for tested party and comparables. Courts focus on whether the PLI reflects the economic substance of the transaction and whether the conditions for its use were properly documented.
Borys UlanenkoCEO of ArmsLength AI
