Debt Capacity and Borrower Analysis: How Much Debt Is Arm's Length?

01Two Questions, Not One

A loan analysis answers two distinct questions about the borrower, and they must not be collapsed into one:

• The quantum question: how much debt is arm’s length?
• The pricing question: what rate applies to that debt?

They are related, because a borrower’s capacity to carry debt and its cost of debt both flow from its financial profile, but they are answered in order. The quantum question comes first, and it is often overlooked. Where the loan amount exceeds the borrower’s arm’s length capacity, the excess is not simply mispriced:

• It may be recharacterized, so that interest on the excess portion is disallowed.
• This happens regardless of how well the rate itself was benchmarked.

The practical takeaway is that debt capacity is a gating test: it establishes the amount of arm’s length debt before the pricing exercise attaches a rate to it. The analysis rests on the options-realistically-available standard from the framework article. An independent lender would advance funds only up to the point where it remained confident of being serviced and repaid, and an independent borrower would take on debt only to the extent it could service it. The arm’s length amount sits where those two positions meet.

02What Debt Capacity Measures

Debt capacity is the maximum amount of debt a borrower could raise and service on its own account, on arm’s length terms, from an independent lender. It is a function of four inputs:

• Cash-generating ability: the operating cash flow available to service debt.
• Stability of that cash flow: how exposed the borrower is to cyclicality or shocks.
• Assets available: what can be pledged or can support borrowing.
• Market-tolerated leverage: the leverage lenders in the borrower’s sector and market accept.

The assessment is forward looking but grounded in observable financials. It asks whether the borrower, on its own projected performance, could:

• Cover its interest obligations with headroom to spare.
• Repay principal at maturity or amortize it over the term.
• Withstand a reasonable downturn without defaulting.

A borrower that passes these tests can support the debt; one that fails them cannot, and the shortfall marks the boundary of its arm’s length capacity. Two points on scope are worth stating:

• Standalone basis. Capacity is assessed on the borrower’s standalone position for the quantum question, though implicit group support influences the pricing that follows. That distinction is developed in the credit rating article.
• Facility-specific. Capacity is not a single universal number. A secured, amortizing, long-tenor loan supports a larger principal than an unsecured bullet loan of the same borrower.

03The Core Metrics

Lenders and analysts assess capacity through a small set of coverage and leverage ratios, read together rather than in isolation.

The ratios divide into two families that test different things:

• Coverage ratios test flow: whether the borrower generates enough cash to service the debt.
• Leverage ratios test stock: whether the total debt load is proportionate to earnings and capital.

A borrower can pass one family and fail the other. Strong current coverage does not rescue a balance sheet carrying far more debt than its sector supports, and modest leverage does not help if near-term cash flow cannot meet the payments.

3.1 Benchmarking the Ceiling

The ratios describe the borrower; the threshold each must clear is set by the market. What counts as an acceptable debt-to-EBITDA multiple or a minimum coverage ratio is drawn from how comparable independent borrowers in the same sector, market, and part of the credit spectrum are actually financed. This is the same comparables discipline used throughout benchmarking: the borrower’s own ratios are read against the range observed for independent companies of similar risk, and the arm’s length ceiling is set by that range rather than asserted.

04A Worked Capacity Assessment

Consider Cordillera Foods, a fictional consumer-goods subsidiary in Chile, proposing to take a 210.0 million intragroup loan from its group treasury. Cordillera’s EBITDA is 42.0 million, and its cash flows are stable but not immune to commodity cycles.

Benchmarking a set of independent packaged-foods companies of similar size and market position shows that lenders in this sector typically support total debt of around 3.5 times EBITDA for a borrower of Cordillera’s profile. Applying that multiple:

• Arm’s length debt capacity: 42.0 million x 3.5 = 147.0 million.
• Proposed loan: 210.0 million.
• Excess above capacity: 210.0 - 147.0 = 63.0 million.

The excess of 63.0 million is the portion that exceeds what an independent lender would have advanced to Cordillera on its own account. If the facility carried a 7 percent rate:

• Interest on the full 210.0 million: 14.7 million.
• Interest referable to the arm’s length portion (147.0 million): 10.29 million.
• Interest on the excess, exposed to disallowance: 4.41 million.

The multiple of 3.5 times is not universal. A borrower with more stable cash flow, tangible assets to pledge, or a stronger market position might support a higher multiple; a more cyclical or asset-light borrower would support less. The multiple must be justified from comparables, not assumed, and the same discipline applies to the coverage thresholds used alongside it.

05What Happens to Excess Debt

Where a loan exceeds arm’s length capacity, the excess is treated in one of two ways depending on the jurisdiction and the facts. The two operate independently:

• Recharacterization (transfer pricing). Under Chapter X and US principles, the portion of the advance above the borrower’s realistic capacity may be delineated as something other than debt, commonly equity. Interest on that portion is then not deductible, and the payment may be treated as a distribution. This follows from the framework: the excess was never an amount an independent lender would have advanced as debt.
• Interest limitation rules (mechanical). Separately from transfer pricing, many jurisdictions cap net interest deductions at a percentage of EBITDA under the OECD’s recommended fixed-ratio approach. These rules can disallow interest even on debt that is arm’s length in amount and price, and they operate mechanically rather than through delineation.

The practical takeaway is that clearing one does not clear the other:

• Debt can clear the arm’s length capacity test and still have part of its interest disallowed by a fixed-ratio rule.
• Debt within a fixed-ratio cap can still be partly recharacterized if it exceeds arm’s length capacity.

Both belong in the analysis.

06Debt Capacity in the Loan Workflow

Debt capacity sits between delineation and pricing:

• Delineation establishes that the arrangement is debt.
• Capacity establishes how much of it is arm’s length debt.
• Pricing then attaches a rate to the arm’s length portion.

Skipping the capacity step risks benchmarking a rate onto a principal that will not survive scrutiny, which wastes the pricing work and leaves the study exposed on its most consequential figure, the deductible interest amount. Once capacity is settled, the analysis turns to the borrower’s credit rating, which drives the spread, and then to the construction of the rate itself.

Comp-Press · Transfer Pricing Practitioner’s Guidance. General best-practice reference, not legal or tax advice.