What Is Cash Pooling?

The basic logic of cash pooling

In holdings and corporate groups, the cash position of every company does not move in the same direction at the same time. One affiliate may carry a substantial cash surplus because of collections on sales, while another may need short-term funds because of capital expenditure, seasonality, inventory financing or a temporary operating deficit. When the companies are managed separately, the surplus company may earn a relatively low return at the bank while the deficit company simultaneously borrows at a higher rate. Cash pooling is a central treasury technique that aims to manage this scattered liquidity together at group level.

The core purpose is to reduce the group’s overall cash requirement; to eliminate idle cash so far as possible; to lower external borrowing and interest expense; to operate with a smaller cash buffer without disrupting payment obligations; and to raise the return on remaining funds. Cash pooling is therefore not merely a bank product; it is also a working-capital and liquidity-optimisation tool. The OECD likewise treats cash pooling as the physical or notional combining of balances on separate bank accounts so that short-term liquidity can be managed more effectively.

Physical (effective) cash pooling

In physical or effective cash pooling, surplus balances on the participating companies’ bank accounts are actually transferred to a central “header” or master account. Deficit accounts are financed by transfers from that master account. The arrangement is often operated through daily automatic sweep instructions.

In zero balancing, sub-accounts are brought close to zero at the end of the day: all surplus cash is swept to the master account and deficits are covered from the centre. In target balancing, a predetermined minimum operating balance is left in each company and only the amount above that level is transferred to the central account.

An important consequence of physical transfer is that intra-group receivables and payables may arise between different legal entities. The company that transfers surplus cash into the pool may become, economically, a creditor of the pool leader; the company that draws funds from the pool may become a debtor. Accounting entries, internal interest, maturities and limits must therefore be set out clearly.

Notional cash pooling

In notional cash pooling the companies’ funds are not actually transferred to a central account. The bank treats the credit and debit balances of the participating accounts together for interest-calculation purposes and applies interest on the net position. The companies can thus keep most of the legal and operational independence of their accounts while still enjoying the interest advantage of the group’s combined balance.

The absence of a physical intra-group lending movement is an important advantage of notional pooling. The bank may nevertheless require cross-guarantees or similar security so that a right of set-off among the accounts is economically effective. How the interest advantage is allocated among the companies is also important. On the OECD approach, the benefit created by pooling should be shared on an arm’s-length basis, taking account of the contributions and burdens of the participants.

A simple applied example

Suppose Company A has a cash surplus of 500,000 lira and Company C a surplus of 700,000 lira, while Company B has a cash deficit of 800,000 lira. Without pooling, A and C earn 55 percent a year on a combined 1,200,000 lira of deposits, while B pays 60 percent on an 800,000 lira loan. In a simplified annual calculation the group earns 660,000 lira of interest income, pays 480,000 lira of interest expense and produces a net interest result of 180,000 lira.

Under physical pooling the surplus of 1,200,000 lira first covers B’s deficit of 800,000 lira; only 400,000 lira of net cash surplus remains outside. If that amount is placed at 55 percent, the group earns 220,000 lira of interest income from outside the group. The economic improvement at group level relative to dealing with the bank separately is therefore 40,000 lira. Intra-group interest changes how the income is distributed among the affiliates; in a consolidated view, however, the essential gain comes from reducing the bank’s loan–deposit spread and the need for external finance.

The relationship with cash sweeping

Cash sweeping is the automatic transfer mechanism used especially in the physical model of cash pooling. Cash above a set threshold can be transferred to the central account at the end of the day; in a two-way sweep the central account sends funds back to the affiliate when needed. Sweeping is not used only in group pooling. A single company may also set a sweep instruction so that surplus cash is transferred automatically to debt repayment, an investment fund, a time deposit or another designated account. Cash pooling is therefore the broader central liquidity system; cash sweeping is a transaction technique that can be used within that system.

Tax and legal points of attention in Türkiye

In Türkiye cash pooling is economically useful, but it cannot be established on a financial-efficiency criterion alone. In physical pooling, intra-group funding may constitute a related-party transaction under the transfer-pricing provisions of the Corporate Tax Law. Article 13 of the Law expressly brings the borrowing and lending of money within that scope. The interest rate applied by the pool leader and the participants must therefore be set and documented on an arm’s-length basis, taking account of maturity, currency, credit risk, security and market conditions.

A second important issue is thin capitalisation. The portion of debt from shareholders or persons related to shareholders that exceeds the statutory limits may be treated as disguised capital, and the interest, foreign-exchange differences and similar financing expenses on that portion may lose their tax deductibility. The cash pool must therefore be monitored not only by reference to consolidated liquidity but also by reference to each legal entity’s equity and debt structure.

In the rulings of the Revenue Administration, lending among group companies is treated as a financing service and the interest amounts may be subject to VAT. In cross-border pools, withholding tax, VAT under the reverse-charge mechanism, double-tax treaties, foreign-exchange differences and transfer-pricing documentation may also arise.

Article 358 of the Turkish Commercial Code should also be kept in view, especially where an affiliate or the parent uses funds from the company. A shareholder’s borrowing from the company is tied to specified capital and profit/reserve conditions. In publicly held companies, security, pledges, mortgages and sureties given by pool participants in favour of one another must also be assessed under the Capital Markets Board’s corporate-governance rules. Cross-guarantees that banks may require in notional pooling are therefore particularly important.

A well-designed cash pool prevents group companies from remaining, independently of one another, “cash-rich” units and “expensive borrowers”, and optimises liquidity at group level. The gain is not only interest saving: the precautionary cash requirement falls, treasury visibility rises, external borrowing is more tightly controlled and resources can be allocated more quickly to investment opportunities. The system must not, however, be managed as if the companies’ separate legal personalities could be ignored. The basic condition of a successful cash pool is that the bank infrastructure, internal limits, an arm’s-length interest policy, accounting records, tax analysis, the security structure and board authorities are designed together. Properly established, cash pooling is therefore not merely a method of “collecting cash”, but an integrated treasury system that manages the group’s cost of financing and liquidity risk.

A short comparison of physical and notional pooling

Feature	Physical / effective	Notional
Movement of funds	There is an actual transfer.	There is no actual transfer.
Main mechanism	Zero balancing / target balancing / sweep	Netting of balances for interest calculation
Intra-group receivables and payables	They generally arise.	A physical lending movement generally does not arise.
Principal risk	Transfer pricing, thin capitalisation, records and tax	Allocation of the benefit, cross-guarantees and legal set-off

Sources and current materials used

1. OECD (2020), Transfer Pricing Guidance on Financial Transactions — cash pooling chapter. Link
2. Revenue Administration of Türkiye, Corporate Tax Law No. 5520 — especially Arts. 12 and 13. Link
3. Revenue Administration of Türkiye, ruling on the VAT and thin-capitalisation assessment of lending among related companies. Link
4. Revenue Administration of Türkiye, communiqué / ruling on transfer pricing and the arm’s-length principle. Link
5. Ministry of Trade of the Republic of Türkiye, Turkish Commercial Code No. 6102 — Art. 358. Link
6. Capital Markets Board, Corporate Governance Communiqué (II-17.1) — provisions on security, pledges, mortgages and sureties. Link
7. European Central Bank (ECB), cash pooling — physical and notional pooling. Link

Warning: Cash-pooling contracts may produce different tax and legal consequences depending on the corporate structure, the participants’ ownership relations, public-company status, currency and cross-border flows. A concrete arrangement should be tested separately against current tax and legal advice before it is put into practice.