Refinance hub
Explore hub →
Model break-even, term-for-term savings, and the 30-year reset trap with your balance and rates — free PDF plan.
Tools
Australian mortgage calculator & home loan toolkit
Start with borrowing power, repayments, then layer offset, refinance, and buying costs. Every output is an illustration — not credit advice and not a lender assessment.
Modelling a home loan is the easy part; matching it to lender policy is where a mortgage broker saves time. When you want your numbers reviewed, send an enquiry (or use the form below after you run a scenario).
On this pageDedicated mortgage page →
Pick a starting point
Three high-traffic flows — then scroll for the full toolkit or use the sticky bar above.
Ask a general home-loan question
Short, general answers only — not personal credit advice. For your situation, send an enquiry or call us.
0/600
Powered by AI for general education. Errors and omissions excepted — always confirm important details with a qualified credit representative. See our privacy policy.
Indicative only
Borrowing power estimator
A rough “how much might I borrow?” from your monthly surplus and an assessment rate you set yourself. Real lenders use detailed expense benchmarks, credit files, and policy buffers — this is not an application outcome.
Payslips / tax return level — after tax, per month.
Everything you spend to live — not the mortgage yet.
Cards, car loans, buy-now-pay-later minimums — rough.
Lenders often assess at a rate above your contract rate (commonly discussed as a “buffer”). Dial this field to stress-test — for example contract + 3% is a common classroom illustration; your lender applies its own rules.
Estimated range
- Monthly surplus for home loan
- $4,150/mo
- At your assessment rate
- $537,245 max loan (P&I)
8.55% p.a. · 30 years · repayment ≈ $4,150/mo
Contrast: same surplus at an illustrative 5.55% p.a. (roughly “assessment − 3%” for comparison only) → about $726,884 — shows why the assessment rate field dominates outcomes.
Excludes LMI, strata, children, HECS, and regional lender rules. For capacity in detail see our borrowing capacity article.
General information only. These calculators provide estimates based on the numbers you enter. They do not constitute credit advice, take your full situation into account, or replace a lender's assessment. Fees, eligibility, and actual offers vary. Speak with a broker for guidance tailored to you.
Repayment calculator
Estimate principal & interest (P&I) repayments for a standard amortising loan at a constant nominal rate. Switching to fortnightly or weekly uses the standard Australian lender approach of paying half (or a quarter) of the monthly figure each period — which genuinely shortens the loan and saves interest. The numbers below model that saving; they do not model offset, redraw, fees, or rate changes.
The amount you intend to borrow after deposit.
Nominal annual rate — not the comparison rate.
Your estimated repayment
$3,636 / month
- Loan term at this frequency
- 30 yrs
- Total repayments
- $1,308,949
- Total interest (estimate)
- $708,949
Modelled from the scheduled monthly repayment of $3,636. Real-world results vary with daily-accrued interest, offset and redraw behaviour, lender fees and rate changes — confirm against your loan contract.
Want this checked against lender policy and fees? Send a quick enquiry with the numbers you used here.
A summary of your loan
Side-by-side at the same loan, rate and starting term — the saving comes purely from paying more often.
| Repayment plan | Repayment | Total interest | Total repayments | Loan term |
|---|---|---|---|---|
| Monthly repaymentsselected | $3,636 / month | $708,949 | $1,308,949 | 30 yrs |
| Fortnightly repayments | $1,818 / fortnight | $554,848 | $1,154,848 | 24 yrs 6 mo |
| Weekly repayments | $909 / week | $554,172 | $1,154,172 | 24 yrs 5 mo |
Modelling assumption: fortnightly repayment = monthly ÷ 2, weekly repayment = monthly ÷ 4. Both result in roughly 13 monthly-equivalent repayments per year instead of 12 — which is where the term reduction and interest saving come from.
How your loan changes over time
The charts below use the scheduled monthly repayment for the balance and principal-vs-interest view. Move your pointer over the curves to see estimated balance by month, and how principal paid and interest paid build up over the life of the loan.
Loan balance over time
Move your pointer along the line to see the estimated balance at each month.
Tap or drag on the chart to see figures for a particular point in time.
Cumulative principal vs interest paid
Lower band: principal repaid. Upper band: interest paid. Total height is cumulative cash out.
Move across the chart to compare how much principal and interest you’ve paid at any point.
First repayment split
Early repayments skew to interest; principal share grows over time.
Interest $3,050 Principal $586
General information only. These calculators provide estimates based on the numbers you enter. They do not constitute credit advice, take your full situation into account, or replace a lender's assessment. Fees, eligibility, and actual offers vary. Speak with a broker for guidance tailored to you.
Comparison rate calculator
ASIC-method · regulated reference
Two home loans with the same advertised rate can cost very different amounts once you add fees. The comparison rate folds the interest rate together with mandatory upfront, ongoing and discharge fees into one APR-style number — calculated under ASIC Regulatory Guide 234. Below you can model both your own scenario AND the regulated $150,000 over 25 years reference loan that every advertised comparison rate uses.
Fees (the bit that moves the comparison rate)
Application, valuation, settlement, lender legals.
Account-keeping, package fee.
Paid once at loan close.
Your scenario · $600,000 · 30 yrs
Headline
6.10%
Comparison
6.13%
+ 3 bp from fees
- Monthly repayment
- $3,636
- Total repayments (30 yrs)
- $1,308,949
- Total fees
- $4,800
- Total cost
- $1,313,749
ASIC reference · $150,000 · 25 yrs
The regulated benchmark every advertised comparison rate in Australia uses.
Headline
6.10%
Comparison
6.25%
Gap
+ 15 bp
On the same fee structure, smaller loans amortise fewer dollars across each fixed-dollar fee, so the comparison rate is typically higher on the $150k reference than on your larger loan. That's why a $1M loan can "feel cheaper" than an advertised comparison rate suggests.
How to read a comparison rate
- A bigger gap = more fees. A 0.30%+ gap between headline and comparison usually signals an annual package fee or hefty upfront costs.
- It assumes you keep the loan to term. If you refinance after 3 years, the upfront fees hurt more than the comparison rate suggests.
- Loan size matters. Bigger loans dilute fixed- dollar fees, so your comparison rate is usually better than the advertised one.
- It excludes third-party fees (LMI, government stamp duty), offset benefits, redraw and break costs — those need a broker review.
Want this checked against actual lender fee schedules for your scenario? Send a quick enquiry with your modelled numbers.
General information only. These calculators provide estimates based on the numbers you enter. They do not constitute credit advice, take your full situation into account, or replace a lender's assessment. Fees, eligibility, and actual offers vary. Speak with a broker for guidance tailored to you.
Trap detector
Which loan is cheaper?
$600,000 over 30 years — guess on headline rate, then see comparison rates.
Decision tree
Fixed vs variable vs split?
Four quick questions — get an illustrative path, not a product recommendation. General information only.
Borrow by scenario
Match a lending pathway
First home, refinance, investor, or self-employed — launch a pre-filled playground, or open a service page.
Pick your character
Choose a borrower type — we load your playground with realistic defaults and live KPI chips. Illustration only; not credit advice.
Refinancer — preview KPIs
Monthly saving$207/moBreak-even17 moSwitch score85/100
- Deposits, schemes, pre-approval timing, and settlement cash.View pathwayFirst home buyer
- Rate, term, equity, and when switching beats a simple repricing.View pathwayRefinance & restructure
- Servicing, rent assumptions, and portfolio sequencing.View pathwayInvestor lending
- Evidence lenders accept and how to avoid last-minute gaps.View pathwaySelf-employed
- Limited recourse residential — specialist lender fit.View pathwaySMSF property (LRBA)
- Contracts, timelines, and build buffers assessors expect.View pathwayConstruction & progress draws
More guides: Resources hub · All services
Topic research hubs
Go deeper — curated guides tying calculators + blog + enquiry
First home buyer guide
Explore hub →
Calculators at the top: funds to complete, borrowing power, and 5% · 10% · 20% deposit compare — every state.
Self-employed hub
Explore hub →
Pathway finder, income estimator, and document library — full-doc, alt-doc, accountant letter, BAS, and ECE refinance lanes.
Investor hub
Explore hub →
Investment lending uses rental shading, portfolio debt, and APRA buffers — not just “rent minus repayments”. Model cashflow, loan structure, and illustrative capacity in the playground before you lodge.
Debt consolidation hub
Explore hub →
Consolidation can lower monthly outflows but often extends total interest paid — the trade-off needs to be explicit before you lodge.
Construction loans hub
Explore hub →
Construction files fail when contracts, valuations, and draw schedules do not match lender policy — not when the builder is slow alone.
Rates & fixed vs variable hub
Explore hub →
Headline rates matter less than how long you will keep the loan, offset use, and revert rates after any fixed period.
Pay off faster hub
Explore hub →
Cost-of-living pressure has more Australians looking for practical ways to pay down their mortgage sooner — and most online calculators only model one strategy at a time.
Prefer the full index? Resources home
Interest-only vs principal & interest
Compare a simplified interest-only monthly instalment with a standard P&I repayment on the same balance and rate — and see what happens after the IO period ends. Real IO periods are time-limited (usually 1–5 years for owner-occupiers, up to 10 for some investor products) and policies vary.
Interest-only (during IO period)
$3,050/month
P&I from day one (over 30 yrs)
$3,636/month
P&I after 5-yr IO (over remaining 25 yrs)
$3,903/month
That's $267 more per month than P&I from day one — the “revert payment shock” most IO borrowers forget about.
Total interest, P&I from day one: $708,949.
Total interest, 5-yr IO then P&I: $753,770.
Comparison
Hover or tap a bar to highlight — amounts shown on the right and in the callout below.
Interest-only (per month, during IO)$3,050
P&I post-IO (over remaining 25 yrs)$3,903
General information only. These calculators provide estimates based on the numbers you enter. They do not constitute credit advice, take your full situation into account, or replace a lender's assessment. Fees, eligibility, and actual offers vary. Speak with a broker for guidance tailored to you.
Offset balance — simple interest illustration
Shows estimated monthly interest saved if your average offset balance fully reduced the balance interest is calculated on. It does not change your scheduled P&I instalment in the bank app; real products combine withdrawal timing, partial offsets, and rounding differently.
Illustrative interest saving
$407
per month vs no offset at this balance
- Per year (×12)
- $4,880
- Scheduled P&I (reference)
- $3,636 /mo
- Offset used
- $80,000
Comparison
Hover or tap a bar to highlight — amounts shown on the right and in the callout below.
Interest saved vs current loan: $407 (13.3% less)
Monthly interest on full loan balance$3,050
Interest accrual net of offset (monthly)$2,643
General information only. These calculators provide estimates based on the numbers you enter. They do not constitute credit advice, take your full situation into account, or replace a lender's assessment. Fees, eligibility, and actual offers vary. Speak with a broker for guidance tailored to you.
Quick check
Am I paying too much?
Enter your loan balance and current rate for an indicative saving band — lighter than a full refinance model. Not a quote; book a review when you want retention vs external lenders checked on your file.
Indicative saving band
$98 – $233/mo
- Rate band (illustration)
- 5.85% – 6.20%
- Repayment could land around
- $3,540 – $3,675/mo
Rate structure
Fixed vs variable — guide matched to your timeline
After RBA moves, the right answer depends on how long you will keep the loan and whether you need offset flexibility. Pick your situation and download tailored talking points.
Loan term comparison
Same loan balance and rate — compare monthly repayment and total interest for two different terms. Shorter terms raise instalments but usually cut total interest paid over the life of the loan in this model.
Term A (25 yrs)
$3,903/mo
Total interest (est.)
$570,770
Term B (30 yrs)
$3,636/mo
Total interest (est.)
$708,949
Monthly difference: $267 (Term B lower instalment). Interest difference: $138,178.
Comparison
Hover or tap a bar to highlight — amounts shown on the right and in the callout below.
Interest saved vs current loan: $267 (6.8% less)
Term A — 25 years (monthly)$3,903
Term B — 30 years (monthly)$3,636
Comparison
Hover or tap a bar to highlight — amounts shown on the right and in the callout below.
Term A — total interest (25 yrs)$570,770
Term B — total interest (30 yrs)$708,949
General information only. These calculators provide estimates based on the numbers you enter. They do not constitute credit advice, take your full situation into account, or replace a lender's assessment. Fees, eligibility, and actual offers vary. Speak with a broker for guidance tailored to you.
Want these home loan numbers checked against real lenders?
Estimates help orientation — product rules, assessment rates, fees, and offsets change what a home loan actually looks like at submission. As your mortgage broker, Bishnu Adhikari can stress-test what you modelled. Send a short note below, use the full contact form, or call 0400 77 77 55. You reach Bishnu Adhikari, not a queue.
Prefer WhatsApp? Message Azure Home Loans · Full contact form · 0400 77 77 55
Split loan — blended rate repayment
If you split the balance between a fixed and variable portion, a reasonable first pass is to blend the two nominal rates by weight, then amortise the full balance as one P&I loan. Reality adds separate ledgers, end dates, and repricing — use this as orientation only.
Fixed dollars: $360,000 · Variable dollars: $240,000.
Blended nominal rate
6.07% p.a.
Estimated P&I repayment
$3,624 / month
- Loan term at this frequency
- 30 yrs
- Modelled total interest
- $704,766
Based on the blended rate across both portions for the full term. Split loans in the real world usually have a fixed end-date shorter than the total term — at that point the fixed portion rolls to variable and the blended figure shifts.
How the balance is split
Illustrative weights for the blended-rate estimate — not separate loan ledgers.
60%
40%
Fixed rate portion: 60%Variable rate portion: 40%
General information only. These calculators provide estimates based on the numbers you enter. They do not constitute credit advice, take your full situation into account, or replace a lender's assessment. Fees, eligibility, and actual offers vary. Speak with a broker for guidance tailored to you.
Prefer a broker to sanity-check the numbers?
We walk through assumptions, lender appetite, and documentation when you're ready — contact Azure Home Loans or start an application.
Refinance term reset vs term-for-term
Compare dollar-for-dollar refinancing (new rate, same remaining years) with a lender default that resets you to a fresh 30-year term. Lower monthly repayments on the reset path can still cost far more interest over time.
Read the full guide: The refinancing term trap explained.
| Scenario | Monthly | Term | Total interest |
|---|---|---|---|
| Current loan (6.2%) | $4,596 | 25 yrs | $678,822 |
| Term-for-term (5.89%) | $4,463 | 25 yrs | $638,948 |
| Reset to 30 yrs (5.89%) | $4,147 | 30 yrs | $793,092 |
Cost of resetting the term
$154,144
Extra lifetime interest vs matching your remaining 25-year term at the new rate — even though the reset path saves $316/month on repayments.
Years added by reset
+5 years
You were at 25 years remaining — a 30-year reset puts 5 extra years of interest back on the clock.
Term-for-term vs staying put
$133/mo
Illustrative saving at the new rate without extending the loan — before switching costs or product features.
Comparison
Hover or tap a bar to highlight — amounts shown on the right and in the callout below.
Interest saved vs current loan: $316 (7.1% less)
Term-for-term — $4,463/mo$4,463
Reset 30 yrs — $4,147/mo$4,147
Comparison
Hover or tap a bar to highlight — amounts shown on the right and in the callout below.
Term-for-term total interest$638,948
Reset total interest$793,092
Extending can still be strategic — releasing equity, maternity leave cashflow, or serviceability — but the mistake is when it happens by default. Enquire before you sign if you want the structure checked.
General information only. These calculators provide estimates based on the numbers you enter. They do not constitute credit advice, take your full situation into account, or replace a lender's assessment. Fees, eligibility, and actual offers vary. Speak with a broker for guidance tailored to you.
Refinance savings
Compare monthly P&I repayments when balance and remaining amortising term are unchanged — then see a simple break-even on switching costs. For the trap where lenders reset you to a fresh 30-year term, use the term reset vs term-for-term calculator above. This tool does not model interest-only rollovers, fixed-rate break costs, cashback vesting, or offset balances moving with you.
Discharge, application, valuation, and legal — ballpark only.
Property details (optional)
Add these for LVR on your downloadable report.
Repayment comparison
- Current (approx.)
- $3,765/mo
- After refinance (approx.)
- $3,511/mo
- Monthly difference
- −$254/mo
- Approx. annual saving
- $3,048/yr
Rough break-even on switching costs: 14 months of saved repayments (excluding offset behaviour and fee timing).
Comparison
Hover or tap a bar to highlight — amounts shown on the right and in the callout below.
Interest saved vs current loan: $254 (6.7% less)
Current repayment (per month)$3,765
New repayment (per month)$3,511
Cumulative savings (60 months)
If the monthly difference stayed steady, saved cash flow stacks roughly along this slope — before tax, offset use, or price changes.
≈ $15k cumulative over 60 months (illustrative)
Free download
Get your personalised refinance savings report
Download a premium branded PDF with your savings headline, rate comparison, LVR (when you add property value), and a direct line to Bishnu — plus a copy in your inbox.
- Monthly saving (illustration)
- −$254/mo
- Annual saving
- $3,048/yr
- LVR (if value entered above)
- Add property value
General information only · Not credit advice · We also email Bishnu a copy of the lead
General information only. These calculators provide estimates based on the numbers you enter. They do not constitute credit advice, take your full situation into account, or replace a lender's assessment. Fees, eligibility, and actual offers vary. Speak with a broker for guidance tailored to you.
Refinance beyond the headline rate
Refinance playground — break-even, term reset trap, and loyalty tax in one tool
The refinance calculator above shows monthly savings, but most Australians miss the trap where a lender resets you to a fresh 30-year term. The refinance playground stacks break-even maths, term-for-term vs reset comparison, and an indicative loyalty-tax band — and emails you a personal comparison PDF.
Extra repayment impact
See how adding a consistent extra amount above your scheduled P&I repayment shortens the loan and reduces modelled total interest — holding the headline rate and mandatory instalment constant. Many fixed-rate products cap voluntary extra repayments; variable loans may pair better with offset redraw logic that this tool does not simulate.
Illustrative outcome
- Approx. loan life
- 23 yrs (270 mo)
- Interest without extra repayment
- $602,359
- Interest with extra repayment
- $427,716
$174,643 less interest in this simplified model, and roughly 90 fewer months of payments — before real-world product rules and redraw/offset behaviour.
Comparison
Hover or tap a bar to highlight — amounts shown on the right and in the callout below.
Interest saved vs current loan: 90 mo (25.0% less)
Months on standard schedule360 mo
Approx. months with extra270 mo
Total interest picture
Taller bar = more interest paid in this simplified model (same vertical scale).
Without extra repayment
$602,359
With extra repayment
$427,716
Interest saved vs baseline: $174,643
General information only. These calculators provide estimates based on the numbers you enter. They do not constitute credit advice, take your full situation into account, or replace a lender's assessment. Fees, eligibility, and actual offers vary. Speak with a broker for guidance tailored to you.
Want to stack every strategy at once?
Mortgage payoff playground — frequency, extras, offset, lump sum & rate review in one tool
The single-lever calculators above are useful, but most Australians save the most by stacking strategies. The payoff playground combines fortnightly switching, extra repayments, your offset, an annual lump sum, and an optional refinance rate — and emails you a personal payoff plan PDF.
Purchase costs & stamp duty
We link to each state and territory's official transfer duty (stamp duty) tools because rules, concessions, surcharges and dutiable value treatments differ — a single generic estimate cannot stay accurate across jurisdictions or budget changes.
Choose where you are buying and use that jurisdiction's calculator for a duty figure. Then layer legal fees, registration, inspections and your post-settlement buffer with your conveyancer and broker.
Calculators are maintained by the relevant revenue office or official provider — not by this website.
Official calculators by state / territory
Once you know where you are buying, use the matching calculator below for duty figures. We can then help you layer in the rest of your purchase costs and borrowing structure.
- VIC·VictoriaOpen official calculator
- NSW·New South WalesOpen official calculator
- QLD·QueenslandOpen official calculator
- SA·South AustraliaOpen official calculator
- WA·Western AustraliaOpen official calculator
- TAS·TasmaniaOpen official calculator
- ACT·Australian Capital TerritoryOpen official calculator
- NT·Northern TerritoryOpen official calculator
Need a clearer picture of total funds to complete — not just duty? We can walk through deposit, fees, and lender options for your state once you're ready.
Buyer-cost planning buffer
Not stamp duty alone — a single dial for "how much extra should I mentally reserve beyond the deposit" while you confirm precise numbers.
$164,375
Total funds to complete (illustration)
Buffer intensity
Selected 4.5% of purchase price
Bar fills from 2% (nominal minimum dial) to 10% (upper dial) — for orientation only.
Illustrative pooled allowance — confirm duty, legal, registration, inspections, and moving with your conveyancer and broker.
Model deposit paths, borrowing power, and 5% · 10% · 20% compare for every state in our first home buyer hub.
General information only. These calculators provide estimates based on the numbers you enter. They do not constitute credit advice, take your full situation into account, or replace a lender's assessment. Fees, eligibility, and actual offers vary. Speak with a broker for guidance tailored to you.
First home buyers · all states
First home buyer hub — duty, FHOG, LMI & funds to complete
The stamp duty lane above links every state calculator. This hub adds funds-to-complete, borrowing power, 5% · 10% · 20% deposit compare, FHBG caps, and emails you a personalised PDF worksheet — pick NSW, VIC, QLD, SA, WA, TAS, ACT, or NT.
Calculator FAQs
How to interpret results, what is included, and when to involve a broker — short answers that match the estimating nature of these tools.
Numbers are the start — not the finish.
When you want your home loan structure checked against real lender rules, send a short enquiry on this page or open the full contact form— include what you modelled.
Prefer a human sense-check on your home loan numbers?
Share your scenario — we sanity-check assumptions against lender policy and suggest next steps.
Prefer the phone? 0400 77 77 55 — direct line to Bishnu Adhikari.