Loan Repayment Calculator

Use this calculator to estimate the payments on your mortgage

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See how extra payments reduce your loan term and interest

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Interest is only charged on your loan balance minus your offset savings

Monthly Payment

$3,160

Total Interest

$637,722

Total Repayment

$1,137,722

Payment Breakdown

Principal: $500,000
Interest: $637,722

Loan Balance Over Time

Watch your balance decrease as you pay down your loan over 30 years

What a repayment calculator is really showing you

A repayment calculator shows more than just the scheduled payment. It helps you see how interest, loan term, repayment frequency, offset balances, and extra repayments change the total cost of the loan.

  • Longer loan terms usually reduce the regular payment but increase total interest.
  • Extra repayments can reduce both the payoff time and the interest bill.
  • Weekly or fortnightly structures can shift the result compared with monthly payments.

How to use this before making a real loan decision

This is a strong planning tool, but lender products and real-world loan setups can still differ. Use it to compare scenarios, then confirm the exact structure with a broker or lender before committing.

  • Test a buffer so repayments still feel comfortable if rates stay higher for longer.
  • Compare principal-and-interest against interest-only carefully, not just on payment size.
  • Use the output alongside borrowing-power and cash-flow checks.

Mortgage repayment FAQs

How do I reduce my total mortgage interest?

The main levers are paying extra, shortening the term, using offset or similar structures where suitable, and avoiding unnecessary time in interest-only arrangements.

Is fortnightly better than monthly for repayments?

It often can be, especially when the loan is calculated on a true fortnightly basis and the repayment pattern results in more principal being paid across the year.

Should I choose the longest loan term to keep payments low?

Not automatically. A longer term improves cash flow but usually increases total interest, so the best structure depends on affordability and your wider plan.

Disclaimer: This calculator provides estimates only and should not be relied upon for financial decisions. Actual loan terms, rates, and eligibility may vary. Please contact a Mortgage Lab adviser for personalised advice.

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