Plain English
Used when both sides bring something unique — not one principal and one routine helper, but two genuinely valuable contributors whose activities are so integrated that they cannot be priced separately. You add up the profit they made together and split it using factors that reflect their contributions.
Technical definition
Identification of the relevant profits to be split from the controlled transactions and splitting of those profits between the associated enterprises on an economically valid basis that approximates the division of profits that would have been agreed at arm's length.
Why it matters
It is increasingly relevant for digital, financial and highly integrated businesses, and it is the method authorities reach for when one-sided methods look implausible.
How it works in practice
- 01Confirm indicators: unique and valuable contributions by both parties, high integration, or shared assumption of economically significant risks.
- 02Determine whether to split actual or anticipated profits.
- 03Define the relevant profit pool consistently for both parties.
- 04Select splitting factors — headcount, costs, assets, or bespoke value drivers.
- 05Apply, then sanity-check the outcome against each party's stand-alone alternatives.
Worked example
Two R&D centres
Two group entities co-develop and jointly exploit a platform, each performing DEMPE functions and bearing development risk. Combined operating profit of 120m is split using accumulated risk-adjusted development spend of 70/30, giving 84m and 36m. Documentation must justify why development spend proxies value creation better than headcount or revenue.
Common mistakes
- Using profit split to rationalise an outcome chosen in advance.
- Splitting a pool defined inconsistently across the two jurisdictions.
- Choosing factors that are easy to measure rather than economically meaningful.
Audit red flags
- Profit split applied where one party is clearly routine.
- Splitting factors changed each year without explanation.
Documentation & data
Documents to hold
- Evidence of unique and valuable contributions on both sides.
- Profit pool definition and reconciliation.
- Factor derivation and sensitivity analysis.
Data you need
- Consistent management accounts across both entities.
- Historical spend or asset data for factor construction.
Who owns this internally: Group tax, with heavy involvement from business controllers.
Jurisdiction notes
- OECD
- Revised guidance from 2018 on the application of the transactional profit split method is now consolidated into Chapter II.
Notes by role
Advisors & consultants
Do not offer profit split as a compromise in audit unless you can defend the pool definition in both countries. Asymmetry creates double taxation.
Frequently asked
- Is profit split a last resort?
- No. It is selected when it is the most appropriate method, though in practice it is used less often than one-sided methods because data demands are high.
Sources & status
- Primary source
OECD Transfer Pricing Guidelines, Chapter II, Part III, Section C
OECD, 2022
- Primary source
Revised Guidance on the Application of the Transactional Profit Split Method
OECD, 2018
Reference material only, not advice on a specific fact pattern. Reviewed 2026-06-30.
Careers
How this shows up in the job
Profit split experience signals seniority. It shows up in digital economy and financial services roles.
Careers in transfer pricing