Plain English
To prove an intercompany interest rate is fair, you need evidence of what unrelated lenders charge borrowers in similar situations. That means pulling data on real loans or bonds with a similar credit rating, currency, tenor and seniority, and using them to build a defensible rate or range — the financial-transactions equivalent of a comparables search for goods or services.
Technical definition
Loan benchmarking is the application of the comparable uncontrolled price (CUP) method to intercompany debt, using databases of syndicated loans, corporate bonds or credit default swap spreads, screened for comparability on currency, tenor, seniority, security, covenants and issuer credit rating, in accordance with OECD Chapter X paragraphs 10.85–10.95.
Why it matters
A rate without a benchmarking study is an assertion, not evidence; on audit, the absence of a study is one of the fastest routes to an adjustment because there is nothing objective to negotiate against.
How it works in practice
- 01Determine the loan's key comparability factors: currency, tenor, seniority, security, covenants.
- 02Establish the borrower's credit rating, standalone and with group support considered.
- 03Search a bond or loan database for issues matching those factors.
- 04Screen out non-comparable issues (different industry risk, distressed issuers, mismatched dates).
- 05Derive an interquartile range of yields or spreads and position the intercompany rate within it.
Worked example
Benchmarking a EUR 15m five-year loan
A treasury team benchmarks a EUR 15m, five-year loan to a BB-rated subsidiary. A database search for EUR-denominated corporate bonds rated BB, 4–6 year tenor, issued in the prior 24 months, returns 14 comparables after screening out financial-sector and distressed issuers. The interquartile range of yields is 5.4%–6.3%, median 5.8%. The loan is priced at 5.9%, just above median to reflect slightly weaker covenants than the comparable set, and the full screening log is retained as evidence.
Common mistakes
- Using bond data for a bank loan or vice versa without adjusting for market differences.
- Failing to adjust for a mismatch in issue date when rates have moved materially.
- Selecting only the comparables that support a pre-determined rate.
Audit red flags
- No screening log or rejection matrix in the benchmarking file.
- Comparable set too small (fewer than five to ten) with no explanation.
- Benchmarking date far removed from the loan's actual drawdown date.
Documentation & data
Documents to hold
- Search strategy and database used.
- Screening and rejection log.
- Final comparable set with yield/spread data and the resulting range.
Data you need
- Bond or loan pricing database access (e.g. Bloomberg, Refinitiv, LoanConnector).
- Borrower credit rating.
- Precise loan terms: currency, tenor, seniority, covenants.
Who owns this internally: Typically outsourced to or led by external advisors with database access; in-house tax reviews and owns the final position.
Jurisdiction notes
- OECD
- Chapter X explicitly endorses CUP as generally the most appropriate method for loans where reliable comparables exist.
- United States
- IRS examiners commonly request the underlying database search parameters, not just the summary range.
Notes by role
Advisors & consultants
The screening criteria you choose are as defensible as the comparables themselves — document the 'why' for every exclusion.
In-house tax teams
Refresh loan benchmarking studies at least annually or whenever the borrower's credit profile changes materially.
Frequently asked
- How often should a loan be re-benchmarked?
- At minimum annually, and whenever there is a material change in the borrower's credit profile or market interest rates.
- Can internal comparables be used?
- Yes, and they are often preferred if the group has genuinely comparable third-party borrowing on similar terms.
Sources & status
- Primary source
OECD Transfer Pricing Guidelines, Chapter X, paras 10.85–10.95
OECD, 2022
- Our interpretation
Practical benchmarking workflow for intercompany loans
This glossary, 2026
Reference material only, not advice on a specific fact pattern. Reviewed 2026-06-30.
Careers
How this shows up in the job
Hands-on experience running a loan benchmarking study in a specialist database is a strong, specific line on a financial transactions CV.
Careers in transfer pricing