Cash pooling is the most common way for a group to manage its liquidity, and one of the hardest intercompany transactions to price, because independent companies almost never pool their cash with each other. Chapter X of the OECD Transfer Pricing Guidelines 2022, the chapter on financial transactions, dedicates Section C.2 (paragraphs 10.109 to 10.148) to it. This article follows that section: what a cash pool is, how its balances are delineated, how the leader and the participants are paid, and what the intercompany cash pool agreement must therefore say. The German statutory rules on intra-group financing, § 1(3d) and (3e) of the Foreign Tax Act, which also govern cash pools, are covered in our separate German-law article.
What is cash pooling, and which types does the OECD distinguish?
Cash pooling brings together, "either physically or notionally, the balances on a number of separate bank accounts" (paragraph 10.109), as part of "a short-term liquidity management arrangement" (paragraph 10.110). The Guidelines distinguish two types:
- Physical cash pooling (paragraph 10.112): the balances of all participants are swept daily into a central account owned by the cash pool leader, and each participant's account is brought back to a target balance, usually zero. Every sweep creates an intercompany receivable or payable.
- Notional cash pooling (paragraph 10.113): no money moves; the bank calculates interest on the combined balance as if the accounts had been merged, and in return usually requires cross-guarantees from the participants.
The distinction matters for remuneration. In a notional pool, paragraph 10.114 sees "little, if any, value added by the pool leader"; the benefit, "the elimination of the bank spread and/or the optimisation of a single debit or credit position", has to be allocated by reference to "the contribution or burden of each pool participant".
Is a cash pool balance a deposit or a loan?
Neither automatically. Paragraph 10.115 warns that "as cash pooling is not undertaken regularly, if at all, by independent enterprises, the application of transfer pricing principles requires careful consideration", and paragraph 10.116 adds that a cash pool "is likely to differ from a straightforward overnight deposit with a bank". Participants deposit into, and draw from, the pool as a whole rather than lending to a particular group company (paragraph 10.117), and none would join if it left them "any worse off than their next best option" (paragraph 10.118).
The decisive test is time. Where positions, "rather than functioning as part of a short-term liquidity arrangement, become more long term", it is usually appropriate to consider whether they should be treated as a longer-term deposit or a term loan (paragraph 10.122), checking "whether the same pattern is present year after year" (paragraph 10.123). The Guidelines set no threshold in months. As a working rule of our own, not an OECD threshold, a participant that has been a net borrower from the pool at three consecutive year-ends should be tested for re-delineation: its position should then be benchmarked like any intercompany loan, including the question whether it could have borrowed that amount at all.
How should the cash pool leader be remunerated?
By its functions, assets and risks (paragraph 10.129), which in most pools are modest. Paragraph 10.130 states the default:
"In general, a cash pool leader performs no more than a co-ordination or agency function … Given such a low level of functionality, the cash pool leader's remuneration as a service provider will generally be similarly limited."
Paragraph 10.45 says the treasury function "will usually be a support service", and Chapter VII on intra-group services can apply. The two worked examples show where the line runs. Leader M in paragraphs 10.133 to 10.137 runs a physical pool with an unrelated bank and "merely performs a co-ordination function"; it "would not earn the kind of reward that a bank would earn such as retaining the interest spread". Treasury company T in paragraphs 10.138 to 10.142 sets the rates, controls credit, liquidity and currency risk and has the capital to bear them; its positions are delineated as intra-group loans, and it may earn part or all of the spread.
| Leader as coordinator (TPG 10.133–10.137) | Leader as in-house bank (TPG 10.138–10.142) | |
|---|---|---|
| Typical functions | Sweeps, netting, contact with the bank | Sets interest rates, decides on lending, manages credit, liquidity and FX risk |
| Risks controlled and borne | None of substance | Credit, liquidity and currency risk, with financial capacity to bear them (10.126–10.127, 10.139–10.140) |
| Delineation of balances | Pool positions with the participants | Intra-group loans and deposits |
| Leader's remuneration | Service fee for coordination (10.130) | Part or all of the interest spread (10.140–10.141) |
| Who receives the synergy benefit | The participants, through their interest rates | Shared, depending on functions and risks |
| Evidence needed | Functional analysis, service cost base | Functional analysis plus proof of risk control and capital |
The Guidelines do not prescribe a cost-plus mark-up for the coordinator; a fee on a cost base is the practical consequence of treating the activity as a low-functional support service. A functional analysis of who actually decides on the rates and who would absorb a participant's default is what puts a leader in one column or the other.
How is the synergy benefit shared among the participants?
Through the interest rates. The remuneration of the participants is "calculated through the determination of the arm's length interest rates applicable to the debit and credit positions" (paragraph 10.143), and the banking arrangements of the leader "may inform the identification of comparable interest rates" (paragraph 10.145), after adjusting for functional differences between the bank and the leader. Paragraphs 10.120 and 10.121 set the order of work: determine the nature of the advantage, its amount, and how it should be divided; the benefit "would generally be shared by the cash pool members", once the leader has received its appropriate reward.
In practice that means two rates per currency: a credit rate for depositors above what they would earn at their own bank, and a debit rate for borrowers below what they would pay for their own overdraft, both derived from each participant's creditworthiness (some tax administrations and courts insist on the group rating instead). Paragraph 10.146 accepts that the benefit may also take another form, such as "access to a permanent source of financing; reduced exposure to external banks; or access to liquidity". A rate grid that pays depositors the bank's deposit rate and charges borrowers the bank's overdraft rate leaves the whole synergy with the leader, which is exactly what the Guidelines rule out for a coordinator.
Who pays for the cross-guarantees?
Often nobody. Banks typically require "full cross-guarantees and rights of set-off" from all participants (paragraph 10.147). Paragraph 10.148 notes that such arrangements "would not occur between independent parties", and that where the facts show the guarantee gives the borrower nothing beyond implicit support from group membership, "no guarantee fee would be due"; any payment made under it after a participant's default "should be regarded as a capital contribution". A guarantee fee is only defensible where a participant demonstrably obtains a benefit beyond its passive association with the group, in line with the guarantee rules in Section D of Chapter X.
What should the intercompany cash pool agreement contain?
The agreement has to make the delineation above verifiable. Five clauses carry the transfer pricing weight:
- An interest formula that can be computed from the contract alone: reference rate per currency plus a fixed credit and debit margin, not a range left to the leader's discretion.
- The leader's fee and its basis: the cost base and mark-up for a coordinator, or the risk allocation that justifies a spread for an in-house bank.
- The allocation of the synergy benefit: how the spread saved on the bank is passed through, for example in the rate grid or by a year-end true-up.
- A review mechanism for persistent balances: a trigger that converts long-standing debit or credit positions into term loans or deposits, as paragraphs 10.122 and 10.123 anticipate.
- Cross-guarantees, information rights and termination: whether a guarantee fee is charged, which reporting the leader receives, and how a participant can leave or be excluded.
Courts are testing these points. On 15 July 2025 the Spanish Supreme Court (STS 985/2025) treated pool positions as short-term intragroup loans, required symmetrical rates on debit and credit positions, applied the group rating rather than each participant's own creditworthiness, and limited a coordinating leader to a cost-based service fee rather than a spread. Paragraph 10.124 asks groups to describe the structure of the pool and the returns to the leader and the members in their transfer pricing documentation, pointing to the master file.
A cash pool is priced in two places: the leader's fee and the participants' interest rates, and the second is where most of the money sits. smartZebra's Credit Spreads Pro derives arm's length credit and debit rates from synthetic ratings, central-bank yield curves and a database of more than 100,000 corporate bonds; what it covers is listed on our facts page.
References
- OECD, Transfer Pricing Guidelines for Multinational Enterprises and Tax Administrations 2022, Chapter X "Transfer Pricing Aspects of Financial Transactions": paragraphs 10.45, 10.109–10.124, 10.125–10.127, 10.129–10.131, 10.133–10.148; Section D (financial guarantees) from paragraph 10.154.
- OECD, Transfer Pricing Guidance on Financial Transactions: Inclusive Framework on BEPS Actions 4, 8-10, February 2020 (the report incorporated into the 2022 Guidelines as Chapter X).
- Tribunal Supremo (Spain), judgment STS 985/2025 of 15 July 2025, appeal 4729/2023: cash pool positions, symmetrical rates, group rating, leader remuneration.
Related pages
- Interest Rate Engine: arm's length interest rates and credit spreads — Credit Spreads Pro, the rating tool and the bond database
- Landmark BFH rulings on arm's length interest rates for intercompany loans — how German courts test intercompany interest
- Credit Spreads Pro update — what the credit spread and rating tools do
- Functional analysis in transfer pricing — the step that decides whether a leader is coordinator or bank
- What changed in the OECD Model Tax Convention 2025? — the new Commentary on Article 9 and financial transactions
- Grounding / Facts — entity definition, data provenance and methodology
