What it means
A group with fifty operating accounts across ten subsidiaries will, without concentration, have some accounts in surplus earning little or no interest and others in overdraft paying a high rate, at the same bank on the same day. Cash concentration eliminates that waste.
By sweeping balances to a master account, the group nets its positions, borrows less, earns more on its surplus and sees its true cash position in one place. There are two main mechanisms.
Physical pooling, also called sweeping or zero balancing, actually transfers funds so that each sub-account ends the day at zero (or a target balance) and the master account holds everything. Notional pooling leaves the money where it is but has the bank calculate interest on the net balance of all the accounts as if they were one; nothing moves, but the group gets the economic benefit.
Notional pooling avoids intercompany loans and is popular where transfers between entities have legal or tax complications, but it is not permitted in every jurisdiction and banks require cross-guarantees between the participating entities. Concentration structures can be domestic or cross-border, single-currency or multi-currency, and can be layered: subsidiaries sweep to a country header account, which sweeps to a regional account, which sweeps to the group treasury.
Each layer adds control and complexity. Cross-border structures raise questions of withholding tax, thin capitalisation rules, transfer pricing on intercompany interest and currency controls, so they are designed with tax and legal advice.
The benefits go beyond interest. Concentration gives the treasurer daily visibility of group cash, reduces the number of external borrowing lines, strengthens control over how subsidiaries use cash and simplifies investment of surpluses.
The costs are bank fees, the need for intercompany loan documentation and interest, and the loss of some local autonomy, which subsidiaries sometimes resist.
In practice
Real-world examples.
Example
A retail chain sweeps the takings of 300 store accounts to a central account every night, so that the treasury can pay suppliers the next morning without any store holding idle cash.
Example
A European group uses notional pooling across its euro accounts in five countries so that a surplus in Germany offsets a deficit in Spain without any cross-border transfer.
Example
A US company with a domestic zero-balance structure moves from twelve overdraft lines with regional banks to one revolving facility at group level, cutting arrangement fees and undrawn commitment fees.
Think of it
“Cash concentration is gathering all your scattered money into one place where you can see and manage it.
Formula
Calculation
Net Interest Benefit of Concentration = Interest saved on overdrafts + Additional interest earned on pooled surplus minus Bank fees minus Interest previously earned on scattered balances
Worked example. A group has four subsidiaries whose accounts at the end of a typical day show:
- Subsidiary A: $2,000,000 credit
- Subsidiary B: $800,000 overdrawn
- Subsidiary C: $500,000 credit
- Subsidiary D: $1,200,000 overdrawn
Without concentration: overdrafts total $2,000,000 at 8% a year, costing $160,000; credit balances total $2,500,000 earning 1%, worth $25,000. Net cost = $135,000 a year.
With physical pooling to a master account: net balance = $2,500,000 minus $2,000,000 = $500,000 credit, which the treasurer invests overnight at 4%, earning $20,000 a year. Overdraft interest falls to zero. Bank fees for the structure are $30,000 a year.
Annual benefit = $160,000 saved + $20,000 earned minus $25,000 previously earned minus $30,000 fees = $125,000
The group also needs to document intercompany loans: on the day above, A and C have lent $2,000,000 and $500,000 to the pool, and B and D have borrowed $800,000 and $1,200,000. Interest on those loans must be set at an arm's-length rate for tax purposes.Case study
Seen in the real world.
A manufacturing group with subsidiaries in eight countries carried $40 million of gross borrowing at an average cost of 6.5% while its subsidiaries held $28 million of cash in local accounts earning almost nothing. Each subsidiary's finance director guarded local cash as a buffer against head office. The new group treasurer implemented a two-tier structure: domestic physical sweeps within each country, and a cross-border notional pool at a single bank for the seven currencies that permitted it, with the eighth country left standalone because of exchange controls.
Intercompany loan agreements, interest rates and cross-guarantees took four months to put in place. On day one, gross borrowing fell by $22 million, saving about $1.4 million a year in interest, and the treasurer could see group cash by 9 a.m. each day for the first time. Two subsidiaries lost local overdraft lines they had used as informal working capital, which forced a proper conversation about their cash needs; the group agreed target balances for each and funded them from the pool.
Watch out
Common mistakes.
- Sweeping every account to zero without agreeing target balances, leaving subsidiaries unable to pay local bills and creating friction.
- Ignoring the tax and legal consequences of intercompany balances that concentration creates, especially across borders.
- Assuming notional pooling is available everywhere. Regulators in some countries prohibit it, and banks need enforceable set-off rights.
Questions
People also ask.
What is the difference between physical and notional pooling?
Physical pooling moves the cash to a master account. Notional pooling leaves the cash in place and nets the interest calculation.
Does cash concentration work with multiple banks?
Sweeps between banks are possible but slower and costlier. Most structures concentrate accounts at one bank per country or region.
How often should cash be swept?
Daily is standard for most groups; intraday sweeps are used where balances are large or borrowing costs high.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%