CPM (Comparable Profits Method): Definition and the US Practice

Definition

The CPM — the comparable profits method — is the one-sided method that equates the tested party’s net profit to the comparable uncontrolled taxpayer’s: the tested party’s net profit (the numerator, on the stated PLI) is set at the level the comparable uncontrolled taxpayer earns on the same function, under the same circumstances. It is the US method (the Treasury regulation Section 1.482-5) — the American expression of the one-sided-profit logic that the OECD framework carries as TNMM — and the CPM vs TNMM comparison has the regulatory lineage and the practical differences.

CPM:  the tested party’s net profit (on the PLI)
        = the comparable uncontrolled taxpayer’s net profit (on the same PLI)
        → the arm’s length price is the price that produces the equated profit

vs TNMM: the tested party’s PLI is tested against the comparables’
         distribution (the IQR) — the range, not the single equated profit

The element	The content
The tested party	The less complex entity (the routine function, the limited risk) — the one-sided method tests one party’s profit, against the comparable’s
The PLI	The net-profit PLI (the operating margin, the Berry-ratio-adjacent cost measures, the asset returns — the PLI list per the Section 1.482-5 categories) — the net profit, the operating costs in (against the GMM gross margin)
The comparable	The uncontrolled taxpayer (the single comparable, or the set — the US practice allows the single-comparable equation where the comparability is tight) — the profit equated, the range the TNMM’s expression
The result	The arm’s length price — the price that produces the equated net profit (the price solved for, from the profit)

The working distinction (the CPM guide): CPM and TNMM are the same logic in two regulations — the one-sided method, the tested party’s profit measured against the uncontrolled’s — and the differences are the expression: the CPM equates the profit to the comparable’s (the single value, the equation), the TNMM tests the PLI against the distribution (the IQR, the range); the CPM’s PLI list is the Section 1.482-5 categories (the net-profit measures), the TNMM’s is the practice’s PLI set. In Indian practice, the CPM’s logic is the TNMM (the Indian regulation’s one-sided method, the IQR range) — the CPM as such is the US reference, and the jurisdiction comparison keeps the US and India columns separate on the method’s expression.

Example

The US tested party (the routine manufacturer, the less complex entity) manufactures the product for the group; the CPM tests its net profit on the operating margin PLI against the comparable uncontrolled manufacturer’s. The comparable’s operating margin is 6.2% on its revenue; the tested party’s revenue is $500m — the CPM equates the tested party’s operating profit to $500m × 6.2% = $31m, and solves for the price: the arm’s length transfer price is the price that produces the $31m operating profit on the tested party’s costs. The tested party’s actual operating profit is $22m — the adjustment: the price moves to produce the $31m (the $9m under-earning, the price’s correction). The TNMM expression of the same logic: the tested party’s 4.4% margin against the comparables’ IQR (5.8%–7.1%) — outside, below, the adjustment to the range (the IQR vs full range convention).

See also

• CPM (the guide)
• CPM vs TNMM · TNMM
• US Transfer Pricing: IRC Section 482

FAQ

CPM or TNMM — are they different methods? The same one-sided logic, two regulatory expressions: the CPM (the US Section 1.482-5) equates the tested party’s net profit to the comparable’s (the equation, the single value); the TNMM (the OECD framework, the Indian practice) tests the PLI against the distribution (the IQR, the range). The differences: the equation against the range, the US PLI categories against the practice’s PLI set, the single-comparable tolerance (the US) against the set’s reliability (the OECD’s significance standard). The CPM vs TNMM guide has the full comparison.

Is the CPM used in Indian practice? The CPM as such (the Section 1.482-5 equation) is the US reference; India’s one-sided method is the TNMM (the IQR range, the Indian regulation’s expression of the same logic). The CPM’s concepts (the one-sided testing, the tested party’s profit against the uncontrolled’s, the PLI) are the TNMM’s — the jurisdiction comparison keeps the columns separate, and the CPM guide notes the Indian practice mapping.

Which PLI does the CPM use? The net-profit PLI — the Section 1.482-5 categories (the operating margin, the cost-based measures, the asset returns — the PLI reference has the family). The net profit (the operating costs in) is the CPM’s measure, against the GMM gross margin (the operating costs out) — the PLI choice is on the tested party’s economics, stated, as the best method rule requires.