Internal Comparables in TP: Test the Third-Party Transaction First
A practical guide to internal comparables in tp, with a worked example, evidence checklist, common mistakes and steps to prepare a defensible working.
AI Summary
The same company provides similar services to an associated enterprise and an independent customer. The useful result is a working that explains the facts, the calculation or classification, and the evidence behind the conclusion. This guide shows how to prepare that working and where a reviewer should investigate before accepting the result.
Scope and applicable period
Indian transfer-pricing documentation for FY 2025–26 / AY 2026–27, with legacy provision references. For Tax Year 2026–27, use the Income-tax Act, 2025 and Income-tax Rules, 2026; OECD guidance does not override Indian law.
Verification date: 11 October 2026. Figures and rates identified as assumptions are teaching examples; apply the stated conditions and the actual facts to a real assignment.
The key principle
An internal comparable is an uncontrolled transaction involving the taxpayer or another relevant party. Its proximity to the business can improve data quality, but it still needs a comparability analysis. Examine products or services, volumes, geography, credit period, contractual terms and risks. A third-party invoice is useful evidence, not automatic proof that the inter-company price must be identical.
Worked example
| Item | Value or fact | What it means |
|---|---|---|
| Related-party price | ₹100 per unit | 30-day credit |
| Third-party price | ₹110 per unit | 90-day credit |
| Volume | 10,000 versus 500 units | Potential economic difference |
| Conclusion | Adjustment analysis needed | Do not compare raw prices only |
The ₹10 price gap cannot be assigned entirely to transfer pricing without examining the longer credit period, order size and other conditions. Quantify adjustments only where the evidence supports a reasonably accurate adjustment. If differences cannot be resolved reliably, record that limitation and evaluate another method or comparable. Preserve actual invoices and contracts rather than relying on an average sales price that combines unlike products. Internal evidence is particularly valuable when its costs and terms can be traced directly.
A practical sequence
Locate the uncontrolled transaction and gather its commercial and pricing records. Compare the controlled transaction’s terms, market, volume and risks.
Quantify differences only where reliable adjustments are possible. Explain the conclusion about comparability and whether another method is more reliable.
Retain rejected internal candidates as well as accepted ones; this makes the selection defensible and prevents selective reliance on the most favourable third-party price.
Separate the factual file from the pricing conclusion
Transfer pricing depends on reliable transaction facts and comparability. Contracts, actual conduct, segment accounts and external evidence should tell a consistent story. A margin calculation is only one part of the analysis: the method, tested party, profit indicator, comparable data and adjustments all need reasons. Keep assumptions visible, preserve original data and reconcile the study with reported transactions. OECD materials help analyse issues, but the applicable Indian provisions and rules govern the Indian compliance conclusion. Do not treat a sample percentage, a contractual charge or a favourable comparable as an automatic arm’s-length result.
Evidence checklist
Keep the following records linked to the same entity, period and working version. Identify missing items explicitly; a checked box should mean the document was examined and supports the stated conclusion.
- Related and uncontrolled contracts
- Invoice and product specifications
- Volume and geographic data
- Credit and warranty terms
- Adjustment calculations
Common mistakes and how to avoid them
- Equating the same product name with comparability. Compare the conclusion with the related and uncontrolled contracts and resolve any conflicting facts.
- Ignoring volume discounts. Trace the affected item to the volume and geographic data before finalising the working.
- Making unsupported round-number adjustments. Use the adjustment calculations to make the final position and remaining exceptions clear.
Before you finalise
Recheck the example’s assumptions against the actual assignment, resolve the identified exceptions and make the final figure or conclusion traceable to its source. Preserve the reviewed version and the reason for material changes. For this task, the adjustment calculations should agree with the conclusion presented to the client, reviewer or authority.
Frequently asked question
Must an internal comparable always be accepted? No. Its reliability depends on the relevant differences and the ability to address them.
Sources and further reading
- Income Tax Department — transfer-pricing methods and Rule 10B
- Income Tax Department — transfer pricing guidance
- OECD Transfer Pricing Guidelines, 2022
Related guide: Management fees shared services transfer pricing evidence.