Estimates only. This calculator is not affiliated with ANZ and does not include fees, charges, or changing variable rates.
How to use this ANZ mortgage repayment calculator
If you are comparing home loan options, this tool helps you estimate repayments quickly. Enter your loan amount, annual interest rate, loan term, and repayment frequency. You can also add an extra repayment amount to see how paying a little more each cycle may reduce interest and shorten your loan term.
- Loan amount: the amount you borrow.
- Interest rate: annual rate applied to the remaining balance.
- Loan term: the total duration of the home loan (for example 25 or 30 years).
- Repayment frequency: monthly, fortnightly, or weekly.
- Extra repayment: optional additional amount paid each period.
How mortgage repayments are calculated
Most principal-and-interest home loans use an amortisation formula. Your repayment covers interest first, then reduces principal. Over time, the interest component gets smaller and the principal component gets larger.
Repayment formula: Repayment = P × r × (1 + r)n ÷ ((1 + r)n − 1)
- P = loan principal
- r = periodic interest rate (annual rate ÷ repayments per year)
- n = total number of repayments
This ANZ mortgage repayment calculator applies that formula and then estimates total interest for the full term. If extra repayments are included, it simulates repayment periods to estimate your faster payoff date and interest savings.
Worked example
Suppose you borrow $650,000 over 30 years at 6.19% p.a. If your repayments are monthly, your baseline repayment is substantial because both interest and principal are being paid from day one. Even a modest extra amount each month can make a large long-term difference.
Why? Because extra payments reduce your principal earlier, and interest is then calculated on a lower balance for the rest of the loan. That “interest-on-interest” effect can save many thousands over time.
Monthly vs fortnightly vs weekly repayments
Monthly
Simple for budgeting and common for salary cycles. Easy to track, but usually means fewer total payment events each year.
Fortnightly
Often aligns with pay cycles. In many setups, paying half the monthly amount every fortnight can result in the equivalent of one extra monthly repayment per year.
Weekly
Best for tight cash-flow management and can support faster principal reduction when paired with disciplined extra repayments.
Ways to reduce your home loan interest
1) Add regular extra repayments
Even $50 to $200 per repayment period can reduce total interest significantly over a long mortgage.
2) Use an offset account effectively
If your ANZ loan includes an offset account, keeping savings in that account can reduce the interest charged on your home loan balance.
3) Avoid unnecessary redraws
Redrawing funds can increase your balance again and undo progress if used for non-essential spending.
4) Recheck your rate regularly
When market rates move, review your loan features, fixed/variable structure, and refinancing options to ensure your current setup remains competitive.
Common mistakes borrowers make
- Using a headline interest rate without checking fees and comparison rate.
- Ignoring the impact of even small extra repayments.
- Assuming rates remain constant over 25–30 years.
- Not stress-testing repayments for higher rates.
- Choosing a longer term for affordability but never making extra payments later.
Frequently asked questions
Is this the official ANZ mortgage repayment calculator?
No. This is an independent educational calculator inspired by common mortgage formulas.
Are lender fees included?
No. Establishment fees, monthly fees, package fees, lender’s mortgage insurance, and government charges are not included in this estimate.
Can I rely on this for final borrowing decisions?
Use it for planning only. For exact repayment schedules and product-specific details, confirm directly with ANZ or a licensed mortgage professional.
Final thoughts
A mortgage is usually the largest financial commitment most households make. A clear repayment estimate helps with budgeting, risk planning, and goal setting. Use this ANZ mortgage repayment calculator to test scenarios, compare repayment frequencies, and evaluate how extra repayments could improve your long-term financial position.