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Bridging Loan Calculator Australia

Estimate your peak debt, bridging finance interest costs, and end debt after selling your existing property — with sale price, time-to-sell and interest rate scenarios.

📖 22 min read  ·  ⏱️ Calculator time: ~1 minute

Your Bridging Loan Details
Existing Property
Existing mortgage balance
$
Expected sale price
$
Selling costs
%
New Property
New purchase price
$
Stamp duty
$
Legal / conveyancing fees
$
LMI (if applicable)
$
Cash contributed upfront
$
Loan Terms
Interest rate (p.a.)
%
Expected bridging period
months
Bridging interest
End loan term (after sale)
years
Loan type
Bridging Loan Result
Peak Debt
MetricValue

Results are estimates only. Actual bridging loan terms, interest calculation methods, and fees vary between lenders. Confirm exact figures with your lender.

📊 LVR at Peak Debt
⚖️ Break-Even Sale Price
💰 Cash Contribution and Purchase Costs
🏠 Different Sale Price Scenarios
⏰ Time-to-Sell Simulation
📈 Interest Rate Scenarios

🔗 Compare With Other Mortgage Options

🏠 Mortgage Calculator 🔄 Refinance Calculator 🔀 Split Loan Calculator 💳 Offset Account Calculator 💡 Borrowing Power Calculator 📋 Stamp Duty Calculator
💬 Thinking about a bridging loan? Comparing lenders or speaking with a mortgage broker can help you find the most competitive bridging rate and terms for your situation — a broker directory is coming soon to MegaCalcOnline.com. In the meantime, our Loan Comparison Rate Calculator can help you compare the true fee-inclusive cost of different loan offers.

📈 Loan Balance: Peak Debt to End Debt

📖 End Loan Amortisation Table (First 10 Years)
YearOpening balancePrincipal paidInterest paidClosing balance
⏱️ Last Updated: August 2026  |  ✅ Reviewed by: Mohsin Iqbal — Australian Finance Content Review  |  Calculator methodology and general guidance reviewed regularly.
⚠️ Important: Results are estimates only. Actual bridging loan terms, interest calculation methods, fees and lending criteria vary significantly between lenders. Bridging finance carries genuine risk if your property doesn't sell within the expected timeframe — always confirm exact figures and discuss your specific situation with your lender or a mortgage broker.

What Is a Bridging Loan?

A bridging loan is short-term finance that lets you purchase a new property before you've sold your existing one.

It "bridges" the gap between settling on your new home and receiving the sale proceeds from your old one, so you're not forced to sell first, move into temporary accommodation, and then buy — a sequence many Australians find impractical, especially with children, pets, or simply the hassle of moving twice.

How Bridging Finance Works in Australia

When you take out a bridging loan, your lender typically combines your existing mortgage balance with the cost of your new property (purchase price plus stamp duty, legal fees and any LMI) into a single, larger loan — this combined figure is your peak debt.

During the bridging period, before your old property sells, interest accrues on this peak debt.

Once your existing property sells, the net sale proceeds (sale price minus selling costs) pay down the peak debt, leaving your end debt — which then continues as your ongoing, standard home loan.

Peak Debt Explained

Peak debt is the maximum amount you owe during the bridging period — it's your existing mortgage balance plus your new property's purchase price plus purchase costs (stamp duty, legal fees, LMI if applicable), minus any cash you contribute upfront.

It's called "peak" because this is the highest point your debt reaches; it only decreases once your existing property sells.

The calculator above shows your peak debt as the headline result, since it's the figure most relevant to understanding your maximum exposure during the bridging period.

End Debt Explained

End debt is what remains once your existing property sells and the net proceeds are applied against your peak debt (plus any interest that accrued during the bridging period).

This end debt then becomes your ongoing mortgage, repaid as standard Principal & Interest over your remaining loan term. The Break-Even Sale Price panel in the calculator above shows exactly what sale price would reduce your end debt to zero.

Interest-Only vs Capitalised Interest

During the bridging period, you generally have two options for how interest is handled. Interest-only means you pay the interest charged each month out of pocket, keeping your loan balance flat at the peak debt amount.

Capitalised interest means the interest is added to your loan balance instead of being paid monthly — convenient if you don't have spare cash flow to service both properties at once, but the balance grows (and compounds) throughout the bridging period, meaning you'll owe more by the time your property sells. The calculator above lets you model either approach directly.

Open vs Closed Bridging Finance

Closed bridging finance is used when you already have an unconditional contract of sale for your existing property, with a confirmed settlement date — this gives the lender certainty about when the bridging period will end, and is generally easier to obtain and can attract a lower rate.

Open bridging finance is used when you haven't yet sold your existing property (or don't have a firm sale date), which carries more risk for the lender and often comes with stricter conditions, higher rates, or a maximum bridging period after which the lender may require the property to be sold regardless of price.

Eligibility for Bridging Finance

Lenders generally assess bridging finance applications based on your combined security (both properties), your serviceability for the end debt once your existing property sells, and increasingly, a realistic assessment of your existing property's likely sale price and timeframe.

Some lenders require a formal valuation of your existing property, and most will cap the bridging LVR (peak debt against combined security) — commonly around 80%, sometimes higher with LMI.

First home buyers typically aren't eligible for bridging finance, since it specifically requires an existing property to bridge from.

Lenders may also want to see evidence that your existing property is realistically priced for the current market — an overly ambitious asking price can work against your application, since it undermines the lender's confidence in your projected sale proceeds.

Self-employed applicants and those with more complex income structures may face additional documentation requirements, similar to a standard home loan application, since the lender still needs to assess your capacity to service the end debt.

Pre-Application Checklist

Before applying for bridging finance, it's worth having the following in order:

Costs of Bridging Finance

Bridging loans typically carry a higher interest rate than a standard home loan, reflecting the additional risk and short-term nature of the product — commonly a premium of 0.5% to 1.5% or more above standard variable rates, though this varies by lender and by whether the bridging finance is open or closed.

Beyond interest, budget for the usual purchase costs on your new property (stamp duty, legal/conveyancing fees, and LMI if your LVR requires it), plus selling costs on your existing property (commonly 2-3% for agent commission and legal fees).

Some lenders also charge a separate bridging facility establishment fee, distinct from any fees on the ongoing end loan — always ask for a full breakdown of fees specific to the bridging structure, not just the headline interest rate.

The Cash Required at Settlement panel in the calculator above summarises the upfront costs you'll likely need in cash.

Risks of Bridging Finance

State-by-State Considerations

Stamp duty timing and concessions vary across Australian states and territories, which can affect the exact peak debt calculation for your new purchase.

In most states, stamp duty is payable at or shortly after settlement of the new property, so it's typically included in your peak debt from day one of the bridging period.

Some states offer stamp duty concessions or exemptions for downsizers or eligible first-time sellers moving to a new principal place of residence — check current rules with your state's revenue office, since these can meaningfully reduce your upfront costs and therefore your peak debt.

Our dedicated Stamp Duty Calculator covers the current rates and concessions for all states and territories in detail.

Bridging Finance for Investors

Property investors sometimes use bridging finance to acquire a new investment property before selling an existing one, timing the transition to avoid missing a purchase opportunity.

The core mechanics are identical to an owner-occupier scenario, but the tax treatment of interest during the bridging period can be more complex — particularly around apportioning deductible interest if the existing property being sold was an investment and the new property is owner-occupied, or vice versa.

This is a case where speaking with a registered tax agent before settling on a bridging structure is particularly worthwhile.

Bridging Finance for Downsizers

Downsizers — often retirees or empty-nesters moving to a smaller property — are a common bridging finance user group, and often end up in the most favourable position: since the new purchase price is typically lower than the existing property's expected sale price, the resulting end debt is often small or even zero, with genuine surplus proceeds left over.

If this describes your situation, pay close attention to the Break-Even Sale Price panel above — many downsizers find their expected sale price comfortably exceeds it.

Alternatives to Bridging Finance

If bridging finance doesn't suit your situation, several alternatives are worth considering. Selling first and renting temporarily removes bridging risk entirely, at the cost of moving twice and potentially needing to find short-term accommodation in a tight rental market.

Negotiating a longer settlement period on your new purchase gives you more time to sell before needing bridging finance at all, or reduces the bridging period required.

A subject-to-sale offer on your new property makes your purchase conditional on selling your existing home, shifting timing risk to the seller rather than to you — though this is a harder offer for a seller to accept in a competitive market.

Some buyers and agents can coordinate simultaneous settlement, selling and buying on the same day, which eliminates the bridging period altogether but requires careful coordination and a degree of luck with timing.

Each alternative has trade-offs worth discussing with a mortgage broker or buyer's agent familiar with your local market.

Refinancing After a Bridging Loan

Once your existing property sells and your loan converts to the end debt, it's worth reviewing whether your current lender's ongoing rate is competitive, or whether refinancing to a different lender makes sense.

Use our dedicated Refinance Calculator to compare your options once you've reached this stage.

Tax Considerations (General Information Only)

If your existing property was an investment property, interest on the portion of your bridging loan attributable to that investment property may be deductible — this calculator provides general information only, not tax advice.

Consult a registered tax agent about the deductibility of interest across the bridging period for your specific circumstances, since apportionment between an owner-occupied new purchase and an investment sale can be genuinely complex.

A Detailed Worked Example, Step by Step

To make the mechanics concrete, walk through a typical upsizing scenario using the calculator's default numbers.

Sarah owns a home with a $400,000 mortgage balance, expects to sell it for around $750,000, and has found a new property she wants to buy for $900,000.

Step 1 — Calculate peak debt. Sarah's lender combines her existing $400,000 mortgage with the $900,000 new purchase price, plus $40,000 in stamp duty and $2,000 in legal fees on the new property.

With no cash contributed upfront, her peak debt is $400,000 + $900,000 + $40,000 + $2,000 = $1,342,000.

Step 2 — Interest accrues during the bridging period. Sarah expects to sell within 6 months and chooses to capitalise the interest at a 7.0% bridging rate rather than pay it monthly, since her cash flow is tight while she's settling into the new home.

Over 6 months, compounding monthly, this adds roughly $47,660 in capitalised interest — bringing her balance at the time of sale to approximately $1,389,660.

Step 3 — Sell the existing property. Sarah's home sells for $750,000. After 2.5% in agent commission and legal fees ($18,750), her net sale proceeds are $731,250.

Step 4 — Calculate end debt. Her net sale proceeds ($731,250) are applied against her balance at sale ($1,389,660), leaving an end debt of $658,410. This becomes her new, ongoing mortgage.

Step 5 — Ongoing repayments. At 7.0% over a 30-year term, Sarah's end debt of $658,410 requires a Principal & Interest repayment of approximately $4,380 per month going forward — this is the figure she needs to budget for once her bridging period ends.

Try adjusting the sale price, bridging period, or interest handling in the calculator above to see how each assumption changes this outcome for your own numbers.

How Lenders Assess Bridging Loan Applications

Lenders assess bridging finance differently to a standard home loan application, since they're effectively taking on two properties as security for a temporary period.

Key factors include: your serviceability for the eventual end debt (not just the peak debt); a realistic, often independently-verified estimate of your existing property's sale value; the combined LVR across both properties; and — particularly for open bridging finance — evidence of your property being actively marketed, since an unsold property after many months represents ongoing risk for the lender.

Some lenders will only approve open bridging finance up to a shorter maximum term (such as 6 months) before requiring the loan to convert or the property to be sold at a reduced price.

Bridging Finance and Timing Your Sale

The timing of your sale relative to your purchase is one of the biggest levers you have over your total bridging cost.

Selling and settling as close as possible to your new purchase minimises the bridging period — and therefore the interest that accrues.

Some buyers coordinate a long settlement on their new purchase (giving more time to sell) or a short settlement on their existing sale (bringing forward the proceeds), reducing or even eliminating the bridging period altogether.

Discuss timing strategy with your real estate agent and mortgage broker early, since it can materially change your total bridging cost, as shown in the Time-to-Sell Simulation panel above.

Questions to Ask Your Lender or Broker

Worked Examples

ScenarioKey detailWhat to notice
Standard upsize$400k existing balance, $900k new purchase, $750k expected saleSee base example in the calculator above
Short bridging period3 monthsLower total bridging interest — see Time-to-Sell panel
Long bridging period12-18 monthsMaterially higher interest cost — a genuine risk factor
Interest-only bridgingPaid monthly, balance stays flatRequires cash flow to service during bridging
Capitalised interestAdded to balance, compoundsNo cash flow needed now, but higher balance at sale
Sale price falls shortBelow break-even priceEnd debt remains — see Break-Even Sale Price panel
Sale price exceeds balanceStrong market, high sale priceSurplus cash after clearing the bridging balance
Rate rise during bridging+1% mid-bridgingHigher bridging interest and end debt — see Rate Scenarios panel

Enter each of these scenarios into the calculator above (adjusting sale price, bridging period, interest handling and rate) to see exact figures for your own situation.

Is Bridging Finance Right for You? A Decision Framework

Bridging finance suits situations where you've found the right new property and don't want to risk losing it while you wait to sell, or where moving twice (selling first, renting, then buying) is genuinely impractical for your circumstances.

It's less suited to uncertain markets where your sale price and timeframe are hard to predict, or where your household budget has little room to absorb a worse-than-expected outcome.

Before committing, run your own numbers through the calculator above using a conservative (not optimistic) sale price and a realistic (not best-case) time-to-sell — if your end debt and repayments remain manageable even under those more cautious assumptions, bridging finance is likely a reasonable fit.

If the numbers only work under best-case assumptions, that's a signal to reconsider the alternatives outlined above, or to negotiate more time before committing to the new purchase.

Pros and Cons of Bridging Finance

ProsCons
Buy your new home without selling firstTypically higher interest rate than a standard home loan
Avoid moving twice or renting in betweenRisk if your property sells for less or takes longer than expected
Secure a property you don't want to lose to another buyerCapitalised interest compounds, growing your balance over time
Flexible interest-only or capitalised repayment optionsMore complex application and assessment than a standard loan
Combined security can support a larger purchaseAdditional fees specific to the bridging facility may apply

Who Should Use This Calculator?

Bridging Loan vs Construction Loan

Both bridging loans and construction loans involve a temporary, interest-focused phase before converting to a standard mortgage — but they solve different problems. A bridging loan covers the gap between buying a new established property and selling your existing one.

A construction loan releases funds progressively as a new home is built, with interest charged only on the amount drawn down at each stage.

If you're planning to buy land and build (rather than buy an established home) while still owning your current property, you may need both structures together — a bridging component for the land purchase and existing mortgage, combined with construction drawdowns as the build progresses. See our dedicated Construction Loan Calculator for the building-specific mechanics.

Ways to Reduce Bridging Interest

Common Mistakes

Formula Sheet

Peak debt = Existing mortgage balance + New purchase price + Purchase costs − Cash contributed
Balance at sale (capitalised) = Peak debt compounded monthly at the bridging rate
Balance at sale (interest-only) = Peak debt (unchanged; interest paid monthly)
Net sale proceeds = Sale price − Selling costs
End debt = max(0, Balance at sale − Net sale proceeds)
Break-even sale price = Balance at sale ÷ (1 − Selling costs %)

Bridging Loan Glossary

TermMeaning
Peak debtThe maximum combined debt during the bridging period, before your existing property sells.
End debtThe remaining debt after your existing property sells and proceeds are applied.
Bridging periodThe time between settling on your new property and selling your existing one.
Capitalised interestInterest added to the loan balance rather than paid monthly, compounding over the bridging period.
Open bridging loanBridging finance without a confirmed sale contract on the existing property.
Closed bridging loanBridging finance with an unconditional sale contract and confirmed settlement date.
Combined securityBoth properties (existing and new) used together as security for the bridging loan.

Conclusion

Bridging finance can make buying before selling genuinely practical, but it comes with real, quantifiable risk — mainly around how much your existing property sells for, and how long it takes.

Use the calculator above to see your own peak debt, model different sale prices and timeframes, and understand your break-even sale price before committing. Pair it with our LVR, LMI and Refinance calculators for the complete financial picture.

Frequently Asked Questions