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Mortgage Amortization Calculator

Generate a full mortgage amortization schedule showing monthly principal and interest. See how your balance reduces over the entire term of your home loan.

Last reviewed 15 August 2026

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Calculator inputs

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When to use this calculator

  • Before comparing mortgage products, brokers or repayment types.
  • When you want to test how a different deposit, rate or term changes the payment.
  • When you need a quick estimate before using a formal illustration or agreement in principle.
  • When you are stress-testing your budget against a higher rate.

A realistic South Africa planning example

Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.

A realistic South Africa planning example
InputValue
Loan Amount (R)R1,600,000
Annual Interest Rate (%)5%
Term (Years)25 years

After entering these figures, focus on result first and then rerun the tool with a more cautious assumption.

How to read your results

Result

The figure produced by this output for the inputs you entered. Change one variable at a time if you want to see what drives it.

Common mistakes

  • !Mixing up loan amount and property value, which distorts affordability and LTV.
  • !Using a headline rate but forgetting fees, insurance or repayment type.
  • !Testing only one term length instead of comparing payment and total cost together.
  • !Treating the result as a lender decision rather than a planning estimate.

What to do next

  • Run a second scenario with a cautious assumption so you can see the downside clearly.
  • Compare the result with the related calculators below before making a decision.
  • Check current local rules, eligibility and provider terms before applying or committing money.
  • Keep a record of the assumptions so you can update the estimate when a quote, bill or pay figure changes.

Frequently asked

Amortization is the process of paying off a mortgage through regular monthly payments. Each payment covers both interest and a portion of the principal, with the interest portion decreasing over time.

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