- Keep multiple banks only when each relationship has a job
- Choose a concentration rail based on value and urgency
- Set minimum balances from actual payment behavior
- Coordinate cutoffs and holidays across institutions
- Preserve redundancy while concentrating excess cash
- Measure concentration by liquidity gained and friction removed
- Editorial Verdict
- Sources
Keep multiple banks only when each relationship has a job
A second or third bank can be valuable for local deposits, acquisition continuity, specialized lending, merchant settlement or payment resilience. Problems begin when accounts remain open after their original purpose disappears. Each relationship should have a documented reason, owner and minimum operating balance. Treasury can then distinguish useful redundancy from idle fragmentation.
Inventory every account quarterly. Record average balance, monthly transactions, fees, credit relationship and business purpose. A regional account that supports $2 million of local collections may justify continued funding. A legacy account holding $180,000 with almost no activity may be better closed or reduced. This review creates the foundation for concentration because the company knows which balances are genuinely operational and which are available to move.
Close or reduce accounts that no longer support a defined operating, credit or contingency purpose. Fewer unnecessary accounts also reduce user administration, statement review and the number of places where stale payment permissions can survive.
Choose a concentration rail based on value and urgency
Cash can be concentrated through ACH, domestic wires or bank specific transfer structures. ACH is usually economical for scheduled movement, while wires provide faster final settlement for larger or urgent transfers. The correct choice depends on amount, timing and bank cutoffs. A company may use daily ACH concentration for routine excess cash and reserve wires for unexpectedly large balances or time sensitive funding.
Build a rules matrix rather than deciding manually each morning. For example, balances above a $100,000 local operating threshold can move by ACH if identified before noon, while any amount needed at the concentration bank for same day debt service may use wire. The matrix should also recognize transfer limits and approval requirements. Moving cash efficiently is not helpful if the company repeatedly pays premium fees because routine forecasting occurs too late.
Set minimum balances from actual payment behavior
Satellite accounts need enough cash to meet local obligations and normal forecast error. Historical data is more useful than round numbers. Review daily lows, recurring debits, deposits, fees and timing variability. If a branch account rarely sends more than $25,000 on a day, keeping $300,000 there may be unnecessary. If a payroll account can suddenly require $200,000, a low target without backup funding can create avoidable failures.
Use target balances that can change with seasonality. A construction business may need larger local balances during active project months and smaller balances during winter. A retailer may need extra liquidity around holiday settlement and refunds. Revisit targets after acquisitions, new payment programs and credit changes. Concentration should release excess money while preserving a reasonable buffer, not sweep every account to the edge of failure.
Coordinate cutoffs and holidays across institutions
Each bank sets its own customer deadlines even when the underlying network is the same. The Federal Reserve ACH and Fedwire schedules are outer boundaries, not corporate cutoffs. A concentration plan should record when each sending bank stops accepting Same Day ACH and wires, the relevant time zone and how much approval time is needed. If the receiving bank needs funds for an afternoon payment, a late sweep from another bank may not arrive in time.
Holiday calendars also matter. U.S. bank holidays affect traditional ACH and Fedwire processing, and international or regional operations can add more complexity. Pre fund critical accounts when a holiday compresses the normal schedule. A company that concentrates Friday evening but needs payroll Monday morning should understand exactly what happens over a long weekend. Automation must be designed around the calendar rather than assuming every day behaves like Tuesday.
Preserve redundancy while concentrating excess cash
Concentration should not create a single point of failure. If all cash is swept to one institution and that bank or the company’s connection becomes unavailable, critical payments may stop. Keep a documented contingency balance or rapidly accessible backup source at a secondary institution. The amount should reflect payroll, supplier obligations and the realistic time needed to restore primary access.
Also maintain current user access at the backup bank. A dormant contingency account is not useful if every authorized signer left the company six months ago. Test login, approval and transfer capability periodically. The objective is a central liquidity position with practical resilience, not absolute centralization. The economic benefit from moving the last dollar of idle cash is small compared with the operational cost of being unable to fund payroll during an outage.
Measure concentration by liquidity gained and friction removed
A good program should reduce idle balances, lower borrowing and improve daily visibility. Track the amount concentrated, interest expense avoided, transfer fees, manual interventions and number of accounts below target. If concentration moves $3 million of idle cash to pay down a line of credit, the economic benefit can be substantial. If it moves $20,000 while generating dozens of manual transfers, the design may not be worth the complexity.
Use consolidated reporting where possible so treasury can see bank positions before moving money. File or API reporting can reduce portal hopping, but the underlying data must be timely enough for decisions. Reconcile intercompany or interbank transfers separately from revenue and expense. The process is successful when finance sees one coherent liquidity picture while operations retain the bank relationships they genuinely need.
Editorial Verdict
Concentrate idle cash without concentrating all risk.
Multi bank concentration works when every account has a purpose, target balances reflect real payment needs and transfer rules account for bank cutoffs. Preserve a funded and tested contingency path at another institution. The goal is a central view of liquidity with operational redundancy, not a single bank at any cost.