Bank Overdraft

A bank overdraft occurs when a company's checking account balance goes negative because checks written, electronic payments made, or withdrawals taken exceed the funds actually on deposit in the account at the bank. Many banks offer overdraft protection arrangements that automatically cover a shortfall up to an agreed limit, often converting it into a short-term loan rather than simply bouncing the payment outright.

Overdrafts usually arise from a timing mismatch rather than genuine insolvency: a company might write several checks on the assumption that an expected deposit will clear before those checks are presented for payment, only to have the checks clear first. Poor cash flow forecasting, an unexpected large payment, or simply a customer's deposit arriving a day later than anticipated can all produce a temporary overdraft even at a company that is otherwise financially healthy.

Accounting convention generally does not allow cash to be reported as a negative asset; instead, an overdrawn checking account balance is reclassified and reported as a current liability, often within accounts payable or a separate bank overdraft line, since it represents an amount the company effectively owes the bank rather than money the company has available. An exception sometimes applies when a company maintains several bank accounts and one account is overdrawn while another, at the same bank, holds a sufficient offsetting balance that the bank has a right to net the two together.

A bank overdraft is distinct from a deliberately arranged line of credit, though the two can look similar in practice. A line of credit is a pre-negotiated borrowing facility a company draws on intentionally; an overdraft is typically an unplanned shortfall, sometimes covered automatically under an overdraft protection agreement that functions much like an informal, usually more expensive, line of credit. Banks typically charge a fee, and often a high interest rate, on overdraft balances specifically because they are unplanned and carry more risk than a properly underwritten credit facility.

A single overdraft is usually a minor administrative nuisance, but a pattern of recurring overdrafts is a warning sign that a company's cash flow forecasting or working capital management needs attention, and lenders reviewing a company's bank statements as part of a credit decision routinely check for exactly this kind of pattern before extending or renewing financing.

A company with $10,000 in its checking account that writes checks totaling $12,500 in a single day, before an expected deposit clears, creates a $2,500 overdraft. If the bank's overdraft protection covers it automatically, the shortfall is typically treated as a short-term advance subject to its own fee and interest rate until the company's next deposit restores a positive balance.

A company's own books rarely show a negative cash balance for long, since cash is not expected to be negative in the ordinary course of business; instead, a bank overdraft that the company intends to repay quickly is typically reclassified out of the Cash account and reported as a current liability, often grouped with notes payable or described on its own line, rather than being left as a negative number inside the cash balance. If a company maintains several bank accounts, a positive balance at one bank and an overdraft at another are generally not netted together for reporting purposes, since doing so would obscure both the true cash position at each bank and the existence of a real short-term borrowing the company has taken on.