Educational Financial Insight.
This calculator uses the amortisation formula to calculate the monthly repayments on a loan. Amortisation is the process of spreading a loan into a series of fixed payments using a standard mathematical model so you can estimate how the balance may fall over the life of the loan.
Educational Core
The loan amortisation formula
A
Monthly Payment
P
Principal Loan Amount
r
Monthly Interest Rate
n
Total Number of Months
Educational Focus
Visualising Debt Cycles
Additional features such as down payment and additional monthly payment have been added as enhancements to help you visualise how extra contributions reduce interest paid over the life of your loan.
Interest Heavy Start
Initially, most of your payment goes towards interest because the principal balance is high.
Principal Shift
As the balance decreases, more of each payment chips away at the principal over time.
Built for learning
What this tool provides
Monthly repayment calculations based on the standard amortisation formula
Full payment-by-payment schedule showing interest vs principal split
Visual charts of your loan balance and payment breakdown over time
Support for down payments (% or amount) and extra monthly payments
CSV export of the full amortisation schedule
What this tool is not
Financial, legal, tax, or investment advice
A replacement for speaking with a qualified financial adviser
Guaranteed to match your lender's exact repayment schedule
A model of fees, variable rates, or lender-specific conditions
A commitment or offer of any financial product
Ready to explore?
Use our calculator to visualise your own repayment path and compare different loan scenarios.
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