Line of Credit — How It Works, Pros & Cons

Updated 12 Mar 2026Content was accurate at the time of publication

A line of credit (LOC) is a flexible, revolving borrowing facility that lets you draw funds up to an approved credit limit, repay, and redraw as needed. If you need short-term renovation cash flow, working capital for your business, or a flexible alternative to a credit card, an LOC can be an efficient option — provided you understand costs, risks and how it compares to other products. This guide explains what a line of credit is (including HELOCs), how it works, typical fees and tax/regulatory signposts, worked examples, and practical comparisons to other common credit options.

What is a line of credit?

A line of credit is a form of revolving credit: the lender approves a maximum credit limit and you borrow (draw) only what you need. Interest is charged only on the amount you've drawn, not on the full limit — unlike a fixed-term loan where the full principal is disbursed up front.

Key points at a glance:

Revolving credit: draw, repay, redraw.
Interest on drawn balance: you're charged for what you use.
Secured or unsecured: many LOCs are secured by property (home equity) but some are unsecured.
Typical uses: renovations, smoothing cash flow, short-term bridging, ad hoc business expenses.
Common terms: HELOC (home equity line of credit), drawdown, credit limit, loan-to-value ratio (LVR).

Related reading: home loan, personal loan, credit card.

How a line of credit works

An LOC operates around a few standard mechanics:

Credit limit: the lender sets a maximum amount based on your income, serviceability and, if secured, the loan-to-value ratio (LVR) of the security.
Drawing funds: you transfer funds to a transaction account or withdraw as needed (drawdown).
Repayments: minimum repayments may be interest-only or principal plus interest depending on the product.
Interest calculation: interest accrues on the outstanding drawn balance; many lenders calculate interest daily and charge monthly.
Revolving nature: as you repay, your available credit is restored up to the limit.
Security: secured LOCs typically require a mortgage on an asset (commonly home equity); unsecured LOCs rely on credit assessment and generally have smaller limits and higher rates.

Types of lines of credit

Common LOC varieties:

Secured Line of Credit (home equity LOC / HELOC): Secured against residential property. Lenders price these more competitively due to lower risk. LVR thresholds commonly determine the limit. See home equity.

Unsecured Line of Credit: No property security. Limits are smaller and rates higher; closer to an overdraft or large credit card facility. See unsecured loan.

Business Line of Credit: Tailored to working capital, receivables smoothing and short-term funding; providers include banks, non-bank lenders and fintechs. Compare with business LOC product pages.

Hybrid products: Some lenders combine LOCs with offset or transaction accounts, or allow split facilities (term loan + revolving credit).

When comparing providers, check whether the product is a true HELOC, a revolving overdraft, or a secured overdraft packaged within a mortgage.

Features & benefits

Why choose an LOC?

Flexibility: draw-as-needed for irregular expenses or projects.
Interest only on what you use: more efficient than a lump-sum loan if you won't need the entire amount immediately.
Convenient cashflow management: good for smoothing seasonal income or interim costs.
Potential tax treatment: interest may be deductible when borrowing for income-producing investments (see tax section).
Faster access than applying for multiple fixed loans: once set up, funds are available without repeating full applications.

LOCs are often compared to home loan redraw features and personal loan structures — each has different trade-offs for cost and discipline.

Risks & drawbacks

LOCs carry specific risks:

Variable rates: most LOC rates are variable and will track market movements (RBA cash rate influence).
Overspending risk: easy access to credit can lead to higher household or business debt.
Asset risk on secured LOCs: if secured and you default, the lender can enforce against collateral.
Limit reductions: lenders may reduce or cancel limits based on credit review or changes in property values.
Ongoing fees and maintenance costs: establishment, annual, transaction and default fees can apply.
Debt creep: minimum repayments (especially interest-only) may not reduce principal, keeping you in long-term debt.

Consumer protection: if you have a dispute, you can consult the Australian Financial Complaints Authority (AFCA) guide on how to make a complaint.

How an LOC compares to other products

Product	Interest	Fees	Flexibility	Best for
Line of credit (LOC)	Variable; on drawn balance	Establishment, ongoing, transaction	Very high — redrawable	Renovations, business cashflow, bridging
Home loan redraw / offset	Lower on mortgage rate; interest on full loan	Mortgage fees, redraw fees	Medium — redraw limited by repayments	Reducing mortgage interest, planned draws
Credit card	High variable; interest on unpaid balances	Annual fee, late fees	High for small amounts; costly for large balances	Short-term purchases, rewards
Personal loan	Fixed or variable; on full principal	Establishment, early repayment fees possible	Low — lump sum disbursed once	Fixed, known-cost purchases (vehicle, consolidation)
Home equity loan (term)	Variable or fixed; on full advance	Establishment, loan fees	Low — fixed lump-sum with set term	Large one-off expenses (major renovations)

Use an LOC when you value draw flexibility and expect to use only parts of the limit. For paying down mortgage principal while maintaining access to credit, compare an LOC to a redraw facility.

Typical costs: rates, fees and how interest is charged

Watch for these pricing elements:

Interest rate: usually variable; secured LOC rates are lower than unsecured.
Establishment fee: one-off charge to set up the facility.
Ongoing/annual fee: regular account-keeping fee.
Transaction fees: per-draw or per-transaction charges.
Limit review fees: some lenders charge for credit limit reviews.
Early closure: fees may apply if you close shortly after opening.

How interest is commonly calculated (plain language):

Daily interest = Outstanding balance × (Annual rate ÷ 365).
Lenders usually aggregate daily interest and bill monthly.

Worked example (illustrative only):

Approved LOC limit: $10,000
Drawn balance: $10,000
Annual interest rate (variable): 7.50% p.a.
Daily interest on $10,000: $10,000 × (0.075 ÷ 365) ≈ $1.11 per day
Monthly interest (30 days): $1.11 × 30 ≈ $123.29
Annual interest (if balance unchanged): $10,000 × 7.50% = $1,500

If you make principal repayments, the interest charged will reduce accordingly. Always check the product disclosure statement (PDS) for exact calculation methods and fee schedules.

Eligibility & how to apply

Typical lender checks and documents:

Income & serviceability: payslips, tax returns, business financials for self-employed.
Credit history: credit report and score checks — see credit score.
Security & LVR: for secured LOCs, valuation of property and LVR assessment.
Identification: photo ID and proof of address.
Statements: bank statements, evidence of liabilities (cards, loans).

Application steps (typical):

Compare product features and fees; request a PDS.
Pre-assessment or pre-approval with documentation.
Property valuation (for secured LOCs).
Formal approval and signing of facility agreement.
Account set-up and access to funds.

You may also explore related borrowing options like mortgage refinance or compare with home loan options if reducing mortgage cost is the objective.

When to choose an LOC: use-cases and decision guide

Common scenarios where an LOC is appropriate:

Renovation projects: draw as costs occur rather than borrowing the full amount up front.
Bridging and short-term funding: interim finance while selling or purchasing property.
Small business cashflow: smoothing payroll, supplier lags, or seasonal volatility.
Investment property: where interest on borrowed funds may be deductible (seek tax advice).

Red flags — reconsider an LOC if:

You lack repayment discipline and will likely carry high balances.
You prefer a fixed payment schedule to force principal reduction.
You need the cheapest long-term rate for a single large purchase — a fixed-term loan might be better.

For business-focused decisions, compare working-capital products like invoice finance and equipment finance; for personal borrowing, compare with personal loan and home loan.

Tax and regulatory considerations

High-level tax note: Interest on LOC funds may be tax-deductible where funds are used to produce assessable income (for example, investment property). This is a general statement and not tax advice — consult a registered tax professional for your situation.

Regulatory and consumer protections:

Responsible lending: lenders must comply with responsible lending obligations.
Information disclosure: request the product disclosure statement (PDS) and compare full cost schedules.
Dispute resolution: unresolved complaints can be escalated to AFCA.
Understanding rate movements: variable rates will move with market conditions; check RBA updates for current cash rate context.

FAQ

Is a line of credit the same as a credit card?

Both are revolving credit, but LOCs typically have lower rates and higher limits; credit cards are designed for transactions and often include rewards. See the credit card guide.

Can my LOC limit be increased?

Yes, subject to lender assessment, updated financials and possibly a new valuation for secured LOCs.

What happens if I miss repayments?

Missed payments can incur fees, higher interest and negative credit reporting; for secured LOCs, repeated default can lead to enforcement of security.

Is interest on an LOC charged on the full limit?

No — interest is charged only on the drawn balance.

Are LOC rates fixed or variable?

Most LOCs use variable rates; fixed-rate LOCs are rare.

Can I use an LOC to consolidate debts?

You can, but consolidation may only be beneficial if the LOC rate plus fees is lower than existing debt costs and you have discipline to reduce balances.

Will a lender reduce my LOC limit?

Lenders can review and reduce limits based on credit performance or security value changes.

Can interest be deductible for investment use?

Possibly — interest may be deductible when used for income-producing assets. Seek tax advice.

How quickly can I access funds once approved?

Once the facility is set up, draws can be immediate (often via transfer to a transaction account), subject to lender processes.

Should I get independent financial advice before taking an LOC?

If the decision affects major assets or tax positions, professional advice is recommended.

Where can I find help if I have a complaint?

Start with the lender's internal dispute process and escalate to AFCA if unresolved.

Key takeaways

A line of credit is best when you need flexible access to funds and pay interest only on what you use. Balance the advantages of flexibility with the discipline required to avoid prolonged high balances, compare full costs and terms, and seek professional advice where major assets or tax positions are affected.