A sweep account is a bank service that automatically transfers excess funds from a business checking account into a higher-yield account (money market fund or MMA) at the end of each business day — then sweeps the funds back when needed to cover disbursements. Maximizes yield on idle cash with no manual action.
A sweep account automates cash management: the business defines a 'target balance' to maintain in checking (enough to cover anticipated disbursements for 1-3 days). Each evening, any balance above the target is swept into an investment vehicle — typically a money market fund or a bank MMA — where it earns overnight yield. Each morning before the business opens, the required funds sweep back into checking. Two main sweep structures: (1) Bank sweep to internal MMA — simpler, typically available at mid-size banks, yields tied to the bank's savings rates. (2) Sweep to money market fund — sweeps into a third-party money market mutual fund (often a government or Treasury fund), typically higher yield than internal MMA but with SEC fund risk disclosures. Note: money market funds are not FDIC-insured; they are SEC-regulated investment products. Most use government/Treasury fund structures with very low but non-zero risk. Sweep accounts are primarily a tool for businesses with significant idle checking balances — if average daily balance is below $25,000-50,000, the yield gained may not exceed the monthly fee charged by the bank for the sweep service. As a rule of thumb: if you hold $100K+ in average daily checking balance, a sweep account likely pays for itself. For lending: a history of sweep-account usage demonstrates financial sophistication and cash-management discipline, which can positively influence bank underwriting decisions. Lenders view it as evidence that the business actively manages liquidity.
It depends on where the funds are swept. Sweeps to a bank's own MMA deposit account retain FDIC coverage up to $250,000. Sweeps to money market mutual funds are NOT FDIC insured — they are SEC-regulated investment products. Government/Treasury money market funds carry very low risk but are not guaranteed. Ask your bank specifically: 'Where do swept funds go, and is that FDIC insured?'
Bank sweep services typically cost $20-50/month. At 4.5% APY, you need roughly $7,000-13,000 in average daily swept balance just to break even on the service fee. For businesses with $50,000+ in average excess checking balance, a sweep account pays for itself in the first week. Below $25,000-30,000 in typical idle balance, the math is less compelling.
Not directly — sweep accounts are an internal cash-management tool and are not reported to business credit bureaus. However, maintaining a healthy average daily balance (whether swept or not) improves your bank relationship and supports underwriting when you apply for a business line of credit or term loan.