How Does a Business Line of Credit Work?

Key highlights

• Approved limit lets you draw, repay and redraw as needed
• Interest generally applies only to the drawn balance
• Every repayment frees up capacity you can draw again later
• Best used for short-term gaps, not permanent funding
• Comparing lenders shapes the limit, pricing and flexibility you get

The mechanics step by step

A line of credit works in a simple cycle. First, a lender assesses your business and approves a maximum limit. When a need arises, you draw down some or all of that limit into your account. You use the funds, then repay as revenue comes in. Each repayment restores your available capacity, so you can draw again later without reapplying. Interest is generally charged only on the amount currently drawn, not the full limit. This draw, repay, redraw rhythm continues for the life of the facility. The limit, pricing and terms all depend on the lender's assessment of your turnover, trading history and credit profile, and remain indicative until confirmed.

How interest and repayments behave

Because interest generally accrues only on the drawn balance, keeping a line of credit largely unused costs little beyond any facility fees, which vary by lender. When you draw, interest applies to that amount until you repay it. Repayments typically reduce the balance and free up capacity, giving you flexibility over how quickly you clear a draw. This differs sharply from a term loan, where you pay interest on the full sum from the start over a fixed schedule. The flexibility is powerful but asks for discipline: because you can redraw easily, it is important to treat the facility as short-term support rather than a balance you never bring down.

A worked example of the cycle

Imagine an approved limit that you leave untouched during a steady month, incurring little cost. A large supplier invoice then falls due before your customers pay you, so you draw part of the limit to cover it. Over the next few weeks, as customer payments arrive, you repay what you drew, and your full capacity is restored, ready for the next gap. You never borrowed more than you needed, and you paid interest only for the weeks the funds were out. That is the everyday reality of how a line of credit works: it absorbs the timing mismatches that are a normal part of running a business, without locking you into a fixed loan.

When it works best and when it does not

A line of credit works best for short-term, recurring or unpredictable needs: bridging payment gaps, buying stock ahead of demand, covering wages, or handling surprises. It is less suited to funding a single large asset such as premises or major equipment, where a term loan spreads the cost more sensibly over a fixed schedule. It also works poorly if treated as permanent funding; a facility that never comes down suggests an underlying cash-flow issue better addressed another way. Used as a buffer for genuine timing gaps, it is efficient and flexible. Matching the tool to the job is the key to getting value from it.

Secured, unsecured and eligibility

A line of credit can be unsecured, needing no property security, or secured against property or assets for a larger limit or sharper pricing. Unsecured facilities are typically available up to around $500,000, with overall funding across Overdrive's panel from around $5,000 up to $5 million, all indicative and subject to lender assessment. To qualify, lenders generally want an active Australian ABN, a minimum trading history often around six to twelve months, and a minimum monthly turnover. Low-doc options may use bank statements or BAS. Newer businesses may still qualify subject to criteria, so it is worth checking rather than assuming you fall short of the threshold.

Costs and staying in control

Pricing on a line of credit is product- and profile-dependent; stronger secured facilities can start from around 7.49% p.a., with unsecured and short-term products priced higher depending on turnover, term, security and credit profile. Rates are indicative and subject to assessment, never guaranteed, and fee structures differ between lenders. The discipline that keeps a line of credit working for you is simple: draw when there is a real short-term need, and repay as cash allows so capacity is there next time. Questions about how interest and fees affect your tax position belong with your accountant, since those depend on your structure and are outside general guidance.

Setting it up through a broker

How a line of credit works for your business depends heavily on the facility you choose, and those vary widely in limit, pricing, security and flexibility. Applying to one bank means accepting its structure without seeing others. Overdrive's Simon Kendrick compares a panel of 80+ banks and non-bank lenders on one application, so you can weigh the options and set up a facility that matches your cash-flow patterns rather than the lender's default. For eligible applicants, this comparison often produces a more workable limit and price, and it avoids several separate applications that each leave a mark on your credit file.

If the way a business line of credit works sounds like a fit for your cash flow, it is worth seeing what you could set up. Simon Kendrick at Overdrive Business Loans can review your turnover, run a soft credit check that leaves no mark, and compare facilities across 80+ lenders to find a suitable limit and price. For eligible applicants, the facility can be arranged efficiently, sometimes with funds available within 24 to 48 hours once in place. Get in touch for an obligation-free quote, and speak with your accountant about how it fits your wider finances.