Simple Interest Calculator (AU)

Calculate simple interest on loans or savings in Australia. Get interest amount, total repayment, and compare to compound interest. Free calculator.

Principal

$

Annual interest rate

%

Term

years

Compounding

Compounding frequency

Simple (none) Monthly Quarterly Annually

Tax

Tax on interest

%

Inflation & deposits

Inflation rate

%

Regular monthly deposit

$

Results update as you type

Results

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Result

—

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How it works

Simple interest: I = P × r × t. Only the original principal earns interest — no compounding. Switch to compound interest at the Standard level to see the difference.

This calculator provides estimates only and does not constitute financial advice. Verify results with a qualified professional.