A business overdraft lets you spend more than you have in your account, up to an agreed limit. It gives you a flexible buffer for short-term cash flow needs. Used well, it's a useful safety net, but it's worth understanding the costs involved before relying on one.

How business overdrafts work

An overdraft is arranged with your bank up to an agreed limit, letting your account balance go negative when needed, without a separate application each time. You only pay interest on the amount you're actually overdrawn, and only for as long as you're using it, which makes it more flexible than a fixed-term loan for short, unpredictable gaps in cash flow.

What overdrafts cost

Overdrafts typically come with an arrangement fee and an interest rate applied to the overdrawn balance, which can be higher than standard business loan rates, reflecting the flexibility they offer. Some overdrafts also charge a fee simply for having the facility available, regardless of whether you use it, so it's worth checking the full fee structure rather than just the interest rate when comparing options.

When an overdraft makes sense

Overdrafts work best for short, unpredictable gaps in cash flow, rather than as an ongoing source of funding. Useful situations include:

•        Bridging the gap between paying suppliers and receiving customer payments

•        Covering an unexpected one-off cost without needing a separate loan application

•        Providing a safety net during seasonal quiet periods

Managing an overdraft responsibly

Because overdrafts are flexible, it's easy to rely on them more than intended, so it's worth monitoring your usage regularly rather than letting it become a permanent feature of your cash flow. If you find yourself consistently near your limit, it may be a sign that a different type of finance, better suited to an ongoing need, would serve your business better than repeatedly relying on overdraft costs.