Capitalised Interest on a Bridging Loan: How It Works in Australia

Capitalised interest is a bridging loan feature where the interest you owe each month is added to the loan balance instead of being paid as a monthly repayment. When the bridging loan is repaid at the end of the term (usually from the sale of a property), the capitalised interest is settled along with the principal. This structure gives Australian borrowers zero monthly repayments during the loan term, which is one of the main reasons capitalised interest bridging loans are used for buy-before-you-sell, renovation, auction, and short-term commercial property finance.

This guide explains exactly how capitalised interest works on an Australian bridging loan in 2026, with the underlying formula, two fully worked numeric examples, and how capitalised interest impacts your peak debt, LVR, and total borrowing cost. If you want to run your own numbers, you can also use the bridging loan calculator.

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Key Takeaways

• Capitalised interest means monthly interest is added to the loan balance instead of being paid each month.

• Most bridging lenders in Australia calculate interest on a daily or monthly basis and compound it onto the balance.

• Capitalised interest is usually funded into the loan at settlement, or accrued progressively and repaid at the end.

• The total cost of the loan is higher than a standard interest-only loan because interest is charged on a growing balance.

• Capitalised interest directly increases your peak debt and must fit within the lender's maximum LVR (typically 70 to 75 percent).

• It is most useful when the borrower has no rental or PAYG income to cover monthly repayments during the bridging period.

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What Is Capitalised Interest on a Bridging Loan?

Capitalised interest (sometimes called rolled-up interest) is interest that is added to the principal loan balance rather than paid in cash each month. Instead of the borrower making monthly repayments, the lender charges interest on the outstanding balance and increases the balance by that amount. The total is repaid in a single lump sum when the bridging loan is discharged.

In Australia, capitalised interest is standard practice on consumer bridging loans used for buy-before-you-sell transactions and on many commercial bridging loans for developers, investors, and business owners. Lenders prefer it when the exit strategy is the sale of a property rather than ongoing income, because it removes the need to assess monthly servicing during the short bridging term.

How Capitalised Interest Is Calculated

Every Australian bridging lender has their own calculation method, but almost all follow the same underlying formula. The three inputs that drive the result are the interest rate, the loan balance (which is changing each period), and the bridging term in days or months.

The formula

Period interest = Outstanding balance × Period interest rate

New balance = Outstanding balance + Period interest

The period interest rate is the annual rate divided by 12 if interest is capitalised monthly, or divided by 365 if it is calculated daily. Most Australian private bridging lenders capitalise interest monthly in arrears.

Simple vs compounded capitalised interest

There is an important distinction between how the rate is quoted and how interest actually accrues:

• Simple interest: interest is charged only on the original principal, not on prior accrued interest. Some lenders use this for very short terms.

• Compounded capitalised interest: each month's interest is added to the balance and the next month's interest is calculated on the new, higher balance. This is the most common approach for Australian bridging loans longer than three months.

Worked Example 1: Consumer Buy-Before-You-Sell

A Sydney homeowner is buying a new $2,000,000 property before selling their existing home (expected sale price $1,800,000, expected to settle in 6 months). They need a bridging loan of $1,400,000 at 9.60% p.a. with monthly compounded capitalisation.

• Month 1: $1,400,000 × 0.80% = $11,200 interest → new balance $1,411,200

• Month 2: $1,411,200 × 0.80% = $11,289.60 → new balance $1,422,489.60

• Month 3: $1,422,489.60 × 0.80% = $11,379.92 → new balance $1,433,869.52

• Month 4: $1,433,869.52 × 0.80% = $11,470.96 → new balance $1,445,340.48

• Month 5: $1,445,340.48 × 0.80% = $11,562.72 → new balance $1,456,903.20

• Month 6: $1,456,903.20 × 0.80% = $11,655.23 → closing balance $1,468,558.43

Total capitalised interest over 6 months: $68,558.43. This is the amount added to the loan and repaid from the sale proceeds. Note how each month's interest is slightly higher than the last because it is calculated on a growing balance - this is the effect of compounding.

When the existing home sells for $1,800,000, the sale proceeds repay the bridging loan of $1,468,558.43, leaving the borrower with $331,441.57 (before selling costs) to apply to their new property. See the full mechanics in our buy-before-selling case study.

Worked Example 2: Commercial Bridging Loan (12 Months)

A property developer in Melbourne takes a $3,000,000 bridging loan at 10.80% p.a. for 12 months while awaiting council approval on a DA uplift. Interest is capitalised monthly at 0.90% per month.

Using the compounding formula Balance × (1 + monthly rate)^months: $3,000,000 × (1.009)^12 = $3,340,641.

Total capitalised interest: approximately $340,641 over 12 months. If the lender had used simple (non-compounded) interest at 10.80% p.a., the interest would have been $324,000. The difference of roughly $16,641 is the cost of compounding on a longer-term bridging loan. See our bridging loans for property developers guide.

How Capitalised Interest Affects Your Peak Debt

Capitalised interest is a direct input into your peak debt. Peak debt is the total amount you owe at the highest point of the bridging period - typically on the day the new property settles but before the existing property is sold. Because capitalised interest grows the loan balance every month, your peak LVR rises as the term runs longer.

This is why Australian bridging lenders assess the deal on the projected end balance (peak debt plus total capitalised interest), not the starting balance. A loan that begins at 70 percent LVR but capitalises interest for 9 months could end at 74 to 76 percent LVR. If the projected end LVR exceeds the lender's cap, the lender will either reduce the advance, require a shorter term, or ask for additional security.

Pros and Cons of Capitalised Interest

Advantages

• No monthly cash repayments during the bridging term.

• Approval focuses on the exit strategy and LVR, not monthly servicing.

• Fits buyers who are equity-rich but income-constrained (downsizers, retirees, self-employed, developers without rental income).

• Simplifies budgeting during property transitions where cash flow is already stretched.

Disadvantages

• Total interest cost is higher than interest-serviced because compounding applies.

• The loan balance grows month-on-month, eroding equity in the security property.

• Peak LVR rises over the term, which may push into higher pricing tiers.

• If the property does not sell on time, extension fees and additional capitalised interest can stack up quickly.

When Does Capitalised Interest Make Sense?

• You are buying a new home before selling your existing home and do not have spare monthly cash flow.

• You are a developer or investor whose exit is a property sale or refinance, not ongoing income.

• You are self-employed with irregular income and cannot easily show serviceability for a short-term loan.

• You are an Australian retiree downsizing and the equity is in your home, not in your bank account.

• You need to settle quickly on an auction purchase and do not have time to prepare full servicing documentation.

Browse more scenarios in our 7 real scenarios blog.

How Lenders Treat Capitalised Interest in Approvals

When an Australian bridging lender assesses your application, they build a funding model that includes every dollar of capitalised interest expected across the maximum term. Typical steps:

• Calculate total capitalised interest on the full approved term, not just the expected term.

• Add establishment fees, legal fees, valuation fees, and mortgage registration costs.

• Compare the projected end balance against the lender's maximum peak LVR.

• Stress-test the exit strategy (sale price, settlement date, refinance capacity).

This is why a strong exit strategy is critical. Learn more in our bridging loan exit strategy guide.

Capitalised Interest vs Paying Interest Monthly: Total Cost Comparison

Using a $1,000,000 bridging loan at 9.60% p.a. for 6 months as a reference point:

• Interest-serviced monthly: $8,000 interest paid in cash each month × 6 = $48,000 total interest. Closing balance = $1,000,000.

• Capitalised monthly compounded: Closing balance = $1,000,000 × (1.008)^6 = $1,048,976. Total interest = $48,976. That is $976 more than interest-serviced, but $0 cash outflow during the term.

The gap is small over six months but widens significantly on longer terms. At 12 months on the same loan, capitalised compounded interest is roughly $100,339 - around $4,339 more than the $96,000 of interest-serviced cost. The premium is the price of zero monthly cash outflows.

Frequently Asked Questions

What does capitalised interest mean on a bridging loan?

Capitalised interest means the interest charged on your bridging loan is added to the loan balance each month rather than paid as a cash repayment. The total interest and principal are repaid together at the end of the loan, usually from the sale of a property.

Is capitalised interest more expensive than monthly interest?

Yes, slightly. Because interest is charged on a growing balance, capitalised interest compounds. Over a 6-month bridging loan the difference is typically less than 2 percent of total interest; over a 12-month loan it can be 4 to 5 percent more than interest-serviced.

How is capitalised interest calculated in Australia?

Most Australian bridging lenders calculate interest monthly in arrears. Monthly interest = outstanding balance × (annual rate ÷ 12). That interest is added to the balance, and the next month is calculated on the new higher balance. Some lenders accrue daily but charge monthly.

Do I pay tax on capitalised interest?

Capitalised interest is treated the same as paid interest for tax purposes in most cases. If the bridging loan is used for investment or business purposes, the capitalised interest may be deductible in the year it is charged, not the year it is paid. Always confirm with a qualified tax adviser.

What happens if the loan runs longer than expected?

Interest continues to capitalise for every additional month the loan is outstanding. Most lenders will charge an extension fee and continue the capitalised interest schedule. This is why lenders stress-test the exit strategy carefully and size the loan conservatively.

Can I switch from capitalised interest to monthly repayments partway through?

Some Australian bridging lenders allow you to start servicing interest monthly once a property has been leased or income becomes available. This is negotiated case-by-case and written into the loan agreement.

How does capitalised interest affect my LVR?

Every dollar of capitalised interest increases your loan balance, which increases your LVR. A loan that starts at 70 percent LVR may end at 74 to 76 percent after 9 to 12 months of capitalised interest. Lenders model this in advance and set the starting advance accordingly.

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Get a Bridging Loan Quote with Capitalised Interest

If you are weighing up whether capitalised interest is the right structure for your bridging loan, run the numbers using the bridging loan calculator, then speak with an experienced specialist who can match your scenario to the right lender. Bridging Loans Australia arranges fast, flexible bridging finance for homeowners, investors, developers, and business owners across Sydney, Melbourne, Brisbane, Perth, and Adelaide.

Explore bridging loan options at Bridging Loans Australia.