Cash Sweep

A cash sweep is an automatic arrangement that moves a company's excess or idle cash out of an unproductive balance and into a defined use — most often paying down debt, or sweeping surplus funds into an interest-earning account so they earn a return instead of sitting still. The word sweep captures the mechanic: at set intervals, whatever cash is above a chosen threshold is swept away and put to work. In corporate finance, the term appears in two common settings. One is treasury cash management, where a bank automatically sweeps surplus balances across a company's accounts into an interest-bearing or overnight investment account each day, so money is never left idle. The other is debt agreements, where a cash-sweep clause requires the borrower to use a portion of its excess or free cash flow to make additional, mandatory prepayments on its loan.

A cash sweep matters because idle cash is a cost. Money left sitting in a non-interest account earns nothing, and cash held while expensive debt accrues interest is money working against the company. A sweep fixes this automatically: surplus cash either reduces the debt on which interest is being paid, or moves somewhere it earns a return, without anyone having to remember to move it. In leveraged deals, a cash-sweep clause protects lenders by ensuring that when the borrower generates spare cash, some of it goes toward repaying the loan faster rather than being spent elsewhere — which reduces the lender's risk and shortens the debt's life. So a cash sweep is a discipline device as much as a convenience: it forces idle or surplus cash to do useful work.

The two main faces of a cash sweep are worth keeping distinct. In treasury and cash management, a cash sweep is a service that moves surplus operating cash automatically into an interest-earning or investment account — often overnight — and back when needed, so a company's balances never sit idle and its short-term cash is always earning something. This is a convenience and yield tool, run day to day. In a loan or credit agreement, a cash sweep is a covenant: a mandatory prepayment mechanism that requires the borrower to apply a defined share of its excess cash flow (and sometimes proceeds from asset sales or new debt) to pay down the loan. Here the sweep is not about earning yield but about accelerating repayment and protecting the lender.

The distinction matters because the two serve different masters. The treasury sweep serves the company, optimizing its own idle cash for return and liquidity. The debt-agreement sweep serves the lender, capturing the borrower's spare cash for faster repayment and reducing credit risk — which is why it is common in leveraged buyouts and other debt-heavy structures. From the borrower's side, a mandatory cash sweep in a loan constrains how it can use its own free cash flow: money that might have funded growth or returns must instead go to the debt. Reading a credit agreement, the cash-sweep terms — what percentage of excess cash flow is swept, and under what conditions the percentage steps down as leverage falls — tell you a great deal about how much financial flexibility the borrower really keeps. This is an explanation of how the covenant works, not financial advice.

A cash sweep is used well when it turns cash that would otherwise sit idle into either lower interest cost or earned yield, without starving the business of the liquidity it needs to operate. On the treasury side, that means setting the sweep threshold so that enough working cash stays available while the surplus is swept into an interest-earning account — capturing return on idle balances without risking a cash crunch. On the debt side, a cash-sweep clause is used well when its terms match the deal: a sweep percentage that meaningfully accelerates repayment and protects the lender, often stepping down as the borrower delevers, while still leaving the borrower enough free cash flow to run and grow the business. The point is to put surplus cash to work while preserving operational room.

The failures are sweeping too aggressively, so the company is left short of the liquidity it needs to operate or invest; setting a treasury sweep that ignores the timing of cash needs and forces awkward reversals; agreeing to a debt cash sweep so heavy that it strips the borrower of the free cash flow required to fund growth; and treating a cash sweep as a passive setting rather than a term to negotiate and monitor. The discipline is to size the sweep to the situation — enough to eliminate idle cash and, in a loan, to satisfy the lender and accelerate repayment, but not so much that the business loses the flexibility it needs. A cash sweep should make idle money productive, not leave the business cash-starved. This describes how cash sweeps work, not financial advice.

Cash sweep — an arrangement that automatically moves excess cash to pay down debt or earn interest — puts idle balances to work, appearing both in treasury management and as a loan-prepayment covenant.

Etymology: source.

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