Centralised treasury functions, cash pools, in-house banks, and group financing entities, are among the most common intra-group financial arrangements, and among the most frequently mispriced. Because cash pooling looks operationally simple (money moves between accounts to net out group-wide liquidity needs), it is tempting to treat the pricing of it as an afterthought. Tax authorities increasingly do not share that view.
What a Cash Pool Actually Does
In a notional or physical cash pool, participating group entities' bank balances are aggregated, either notionally, for interest calculation purposes, or physically, through actual cash sweeps, allowing the group to net short-term cash surpluses in one entity against cash deficits in another, reducing overall external borrowing costs and often earning a better blended interest outcome than each entity could achieve independently at a standalone bank. The pool leader, typically a treasury centre, coordinates the arrangement and often earns a spread between the rates offered to depositor and borrower participants.
Pricing the Pool Leader's Function
The central transfer pricing question is what the pool leader should be compensated for performing, and the answer depends heavily on what functions and risks it actually assumes. A pool leader that performs a purely administrative, coordination role (calculating balances, arranging sweeps) should earn a modest service fee reflecting that limited function. A pool leader that takes on genuine credit risk, guaranteeing deposits, absorbing the risk of a participant's negative balance, or providing liquidity beyond what the pool's net position would otherwise support, is performing a treasury/banking-like function and should be compensated accordingly, typically through an interest margin rather than a flat fee.
Depositor and Borrower Rates Within the Pool
Participants contributing surplus cash to the pool (depositors) and those drawing on it (borrowers) should each receive rates that reflect what they could achieve independently in the market for short-term deposits and borrowings respectively, not simply a single blended rate applied uniformly across all participants regardless of their individual credit profile. A high-credit-quality participant contributing surplus cash should not be forced to accept the same low deposit rate as a lower-rated participant, and a lower-rated borrower drawing from the pool should not automatically receive the group's best borrowing rate purely by virtue of pool membership, unless the pooling arrangement itself is structured to genuinely pass that benefit through as part of the arm's length bargain.
Synergy Benefits and Who Keeps Them
Cash pooling generates a genuine synergy benefit, since the group as a whole typically achieves a better net interest outcome than the sum of what each entity could achieve standalone, and the allocation of that synergy benefit among participants and the pool leader is itself a transfer pricing question. OECD guidance under Chapter X indicates the synergy benefit should generally be shared among participants in a manner consistent with what independent parties would negotiate, rather than being captured entirely by the pool leader or by whichever entity happens to hold the strongest bargaining position within the group.
Short-Term vs Long-Term Positions Within the Pool
A participant that consistently maintains a large positive or negative balance within the pool over an extended period is, in substance, providing or receiving longer-term financing rather than genuine short-term liquidity management, and tax authorities increasingly test whether persistently large pool balances should be recharacterised and separately priced as term loans rather than left folded into the pool's short-term interest mechanics. Groups should monitor participant balances for exactly this pattern and consider converting a chronically large position into a formally documented intercompany loan before an audit forces the recharacterisation.
Conclusion
Cash pool pricing under Chapter X turns on a single functional question, whether the pool leader bears genuine credit risk or performs a purely administrative coordination role, since that determines whether compensation should be a service fee or an interest margin. Depositor and borrower rates within the pool should be benchmarked to each participant's standalone credit profile, and any persistently large pool balance should be tested for recharacterisation as a term loan before an audit forces the point.
