Margin lending is a form of borrowing that allows investors to borrow money to invest in shares or managed funds, using their existing portfolio as collateral. The potential benefit is amplified returns if the market rises — but the risk is amplified losses if the market falls, including the possibility of a margin call where you must top up your account or be forced to sell.
How Margin Lending Works
A margin loan provides credit against the value of an eligible investment portfolio:
- You deposit your existing shares/ETFs (or cash) as collateral
- The lender allows you to borrow up to a maximum Loan to Value Ratio (LVR) against those assets — typically 50–75% depending on the security
- You invest the borrowed funds plus your own equity into additional eligible shares or ETFs
- You pay interest on the borrowed amount (charged monthly or annually)
- If your portfolio value falls and the LVR exceeds the maximum, you receive a margin call requiring you to repay funds, add more collateral, or sell assets
Example — How a Margin Loan Amplifies Returns and Losses
Scenario: $50,000 own capital + $50,000 margin loan = $100,000 invested
| Outcome | Portfolio moves | Own equity change | Effect vs no borrowing |
|---|---|---|---|
| Market rises 20% | $120,000 portfolio | $70,000 own equity (40% gain) | 20% gain without margin |
| Market falls 20% | $80,000 portfolio | $30,000 own equity (40% loss) | 20% loss without margin |
This illustrates how leverage amplifies both gains and losses. If the market falls significantly, your equity can be wiped out before the margin loan balance is affected.
Margin Calls
A margin call occurs when the LVR of your portfolio exceeds the allowed maximum:
- Buffer LVR: The LVR at which you receive a margin call warning
- Maximum LVR: The hard limit — you must act (deposit more, sell assets, or repay loan) to restore the LVR
Margin calls can occur at any time — including overnight or during high-volatility periods. If you cannot respond quickly, the lender may sell your assets to restore the LVR — potentially locking in losses.
The 2020 COVID crash caused significant margin calls across Australian retail margin lending accounts within days of the market fall.
Interest Rates on Margin Loans
Margin loan interest rates are typically higher than standard home loan or personal loan rates. In 2026, Australian margin loan interest rates vary by lender and LVR but are broadly in the range of 6–10% per annum for retail borrowers. Interest is generally charged on the outstanding balance and is payable regardless of portfolio performance.
Tax Deductibility of Margin Loan Interest
Margin loan interest may be tax-deductible against investment income if the borrowed funds are used to generate assessable income (e.g., dividends). The ATO’s rules on investment interest deductibility are specific and depend on the structure of the investment and income received. Professional tax advice is recommended.
Margin Loan Providers in Australia
| Provider | Notes |
|---|---|
| CommSec Margin Loan (CommBank) | Most accessible for retail investors |
| NAB Equity Lending | Available for portfolios of eligible ASX and managed funds |
| Bell Potter | Available for larger portfolios |
Margin lending product availability varies by provider and may be restricted to certain client types.
Who Should Consider Margin Lending?
Margin lending is not appropriate for most retail investors. It may be considered by:
- Sophisticated investors with a strong understanding of leverage and portfolio risk
- Investors with stable income who can comfortably service margin loan interest
- Investors who have a strategy specifically designed around leverage (e.g., a debt recycling or gearing strategy reviewed with a financial adviser)
Margin lending is not appropriate for:
- Beginning investors
- Investors who cannot absorb large or rapid losses
- Investors without liquid savings to meet potential margin calls
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Frequently Asked Questions
What is the difference between a margin loan and a personal loan for investing? A margin loan is secured against the investment portfolio itself — the lender can issue a margin call and potentially sell assets. A personal loan is unsecured (or secured against other assets) and does not carry margin call risk. However, personal loan rates are typically higher and loan sizes smaller.
Can margin calls happen quickly? Yes. During sharp market falls, margin calls can occur within hours. Investors must have a plan for how they will respond — including holding liquid cash reserves or having the ability to repay quickly.
Is margin lending interest always tax-deductible? Not automatically. The ATO requires that borrowed funds generate assessable income for interest to be deductible. The specific rules depend on your circumstances and the structure of the investment. Seek professional tax advice.
This article provides general financial information only. Margin lending involves significant risk including the possibility of losses greater than the initial investment. For advice tailored to your situation, speak with a licensed financial adviser. You can find one through the ASIC financial advisers register or MoneySmart.