Repayment at a glance
Enter loan amount, annual rate, loan term, and normal payment frequency to see repayment and total interest. Add an optional extra monthly payment to model faster payoff.
How this mortgage calculator works
Amortising home-loan payments
Enter loan amount, annual interest rate, term, and payment frequency style inputs to estimate repayment size and interest totals for a standard amortising mortgage. The maths spreads principal and interest over many scheduled payments. Product fees, offsets, redraws, and fixed-rate reprice events are outside this simplified model.
Worked example
A larger deposit reduces principal and usually the payment. A shorter term raises the payment but cuts lifetime interest. Small rate differences compound into large totals over 25–30 years.
Common mistakes
- Comparing advertised rates without including fees (APR-style comparisons help).
- Ignoring that interest-only periods change cash flow entirely.
- Treating the estimate as a bank approval amount.
FAQs
- Guide to concepts?
- How mortgages work.
- Personal loans?
- Loan Calculator.
When this page helps
Use it when you want a transparent, browser-side calculation with the assumptions spelled out — then verify anything high-stakes against primary docs, a professional, or your own measurements. The related links below point to sibling tools and longer guides when you need more context.
Accuracy notes
Results depend entirely on the numbers you enter and the simplified model described above. Device clocks, tape measurements, market rates, and recipe conventions can all differ from a perfect textbook case. If an output looks surprising, re-check units first, then re-read the formula section.
Related: Loan, Interest, Debt Payoff.
Last updated: July 2026