The amount borrowed
How much difference does the deposit make?
Every extra dollar of deposit is a dollar not borrowed and not charged interest for up to thirty years. It also moves your LVR, which can change your pricing tier.
CALCULATOR
What will the repayments actually be?
The starting number for almost every property decision.
RUN THE NUMBERS
Estimate your repayments
Enter the loan you are considering. The estimate updates as you type, and the extra repayment and offset fields show what either one would be worth over the life of the loan.
Use a rate you have actually been quoted rather than an advertised headline rate.
Options that change the outcome
Paid on top of the scheduled repayment, every period.
Money held in an offset account reduces the balance interest is charged on.
Repayments are lower while it lasts and higher afterwards, because the principal still has to be repaid over a shorter remaining term.
Estimated repayment
$4,520.77
per month
- Total interest
- $877,476
- Total cost of the loan
- $1,627,476
- Paid off in
- 30 years
- Interest saved
- $0Add an extra repayment or an offset balance
- Amount borrowed$750,000
- Interest$877,476
Year by year
| Year | Interest | Principal | Balance |
|---|---|---|---|
| 1 | $45,125 | $9,124 | $740,876 |
| 2 | $44,557 | $9,692 | $731,183 |
| 3 | $43,954 | $10,295 | $720,889 |
| 4 | $43,314 | $10,935 | $709,953 |
| 5 | $42,634 | $11,616 | $698,338 |
| 6 | $41,911 | $12,338 | $685,999 |
| 7 | $41,144 | $13,106 | $672,894 |
| 8 | $40,328 | $13,921 | $658,973 |
| 9 | $39,462 | $14,787 | $644,186 |
| 10 | $38,542 | $15,707 | $628,479 |
| 11 | $37,565 | $16,684 | $611,795 |
| 12 | $36,528 | $17,722 | $594,074 |
| 13 | $35,425 | $18,824 | $575,250 |
| 14 | $34,254 | $19,995 | $555,255 |
| 15 | $33,010 | $21,239 | $534,016 |
| 16 | $31,689 | $22,560 | $511,456 |
| 17 | $30,286 | $23,963 | $487,492 |
| 18 | $28,795 | $25,454 | $462,038 |
| 19 | $27,212 | $27,037 | $435,001 |
| 20 | $25,530 | $28,719 | $406,282 |
| 21 | $23,743 | $30,506 | $375,776 |
| 22 | $21,846 | $32,403 | $343,372 |
| 23 | $19,830 | $34,419 | $308,953 |
| 24 | $17,689 | $36,560 | $272,393 |
| 25 | $15,415 | $38,835 | $233,558 |
| 26 | $12,999 | $41,250 | $192,308 |
| 27 | $10,433 | $43,816 | $148,492 |
| 28 | $7,707 | $46,542 | $101,950 |
| 29 | $4,812 | $49,437 | $52,512 |
| 30 | $1,737 | $52,512 | $0 |
What this calculation assumes
- The rate you enter applies for the whole term. In practice a variable rate moves, and a fixed rate reverts at the end of the fixed period.
- Repayments are assumed to be made on time, every period, with no repayment holidays or redraws.
- Lender fees — application, settlement, valuation, annual package fees — are not included in the repayment figure.
- An offset balance is treated as constant. In real life it rises and falls with your spending, so the actual saving differs.
- Interest is calculated on the balance at each repayment. Most Australian lenders calculate daily and charge monthly, which produces a slightly different figure.
WHAT IT TELLS YOU
A repayment estimate turns a loan amount into a monthly figure
Three inputs drive it: how much you borrow, the interest rate, and the term. From those, a standard amortisation calculation produces the regular repayment that would clear the debt over that period.
The figure is useful for budgeting and for comparing scenarios — what happens if you borrow less, or fix, or take a shorter term. It is not what a lender uses to decide whether to approve you.
Two things people consistently underestimate: how much total interest a longer term adds, and how much a small rate movement changes the repayment on a large balance.
WHAT MOVES THE NUMBER
The three things that change everything
The interest rate
How sensitive is the repayment?
On a large balance, a rate movement of a fraction of a percent changes the monthly figure noticeably. That sensitivity is exactly why a buffer matters.
The loan term
Is a longer term cheaper?
Monthly, yes. Overall, no. Stretching a loan reduces each repayment and increases the total interest paid, often by a great deal.
READING THE RESULT
An estimate is a starting point, not an answer
What the calculation covers
- Principal and interest repayments — on a standard amortising loan over the term you choose.
- The effect of extra repayments — where the calculation allows you to add them.
- Comparison between scenarios — different amounts, rates and terms side by side.
What a lender does differently
- Lenders assess at a buffered rate — above the actual rate, so their figure is higher than yours.
- Living expense benchmarks apply — lenders use a minimum figure regardless of how frugal you are.
- Other debts are counted — including credit card limits, whether or not you use them.
- Fees are not usually included — package, valuation and settlement costs sit outside the repayment.
COMMON QUESTIONS
Questions about this calculation
Why is my repayment different from what a lender quotes?
A calculator applies the rate you enter. A lender applies its own rate, adds any package or account fees, and may calculate on a slightly different cycle — monthly, fortnightly or weekly.
The bigger gap is in serviceability: lenders assess your ability to repay at a buffered rate well above the actual one.
Should I make weekly or fortnightly repayments?
Fortnightly repayments set at half the monthly amount result in the equivalent of thirteen monthly repayments a year rather than twelve, which reduces the term and the total interest.
It only works if the fortnightly amount is genuinely half the monthly figure, rather than the monthly total divided across the year.
How much difference do extra repayments make?
More than most people expect, particularly early in the loan when the balance and therefore the interest charge are highest.
Even modest regular extra repayments can take years off a thirty-year loan. The same effect is achieved by keeping savings in an offset account.
Should I choose a shorter loan term?
A shorter term means higher repayments and substantially less total interest. It is worth doing if the higher repayment is comfortably affordable.
A longer term with voluntary extra repayments gives you a similar outcome with more flexibility if things get tight.
OTHER CALCULATORS
Other numbers worth running
GET IN TOUCH
Want the estimate checked against real lender policy?
Would rather talk it through?
(02) 9659 1694Important information
This page explains a calculation. Any figures you produce from it are estimates based on the assumptions described, not a quote, an offer of credit, or an indication that finance will be approved.
The information on this page is general in nature. It has been prepared without taking your objectives, financial situation or needs into account, so it is not personal advice and you should consider whether it is appropriate for you before acting on it.
Any rates, figures or examples shown are indicative only. Lending is subject to approval, and lender eligibility criteria, terms, conditions, fees and charges apply. Talk to us about what your own circumstances allow.