High Interest Savings Account Interest Calculator
Estimate the monthly and annual interest earned on an Australian high interest savings account, including the effect of monthly compounding.
Your results
Calculation breakdown
- Monthly interest
- Monthly interest = balance × (annual rate ÷ 12)
- Annual compounding
- Closing balance = balance × (1 + annual rate ÷ 12)^12
Worked example
A $15,000 balance earning 5% p.a. compounded monthly earns about $62.50 in the first month and roughly $769 over a full year.
Assumptions
- Assumes a static balance with no further deposits or withdrawals.
- Interest compounds monthly, matching typical Australian savings account crediting.
How this calculator works
This calculator estimates the interest earned on a high interest savings account by compounding your balance monthly at the annual rate you enter. It shows monthly interest, first-year interest and the closing balance, useful for comparing ongoing base rates across banks.
Frequently asked questions
Does this include bonus interest conditions?
No, this uses a flat ongoing rate; use the Bonus Interest Saver calculator to model accounts with base plus bonus rate structures.
How often is interest compounded here?
Interest is compounded monthly, which matches how most Australian savings accounts calculate and credit interest.
Does it account for regular deposits?
No, this models a static balance; for goal-based saving with regular deposits, use the Time to Save a Target calculator.
Results are estimates only and are not financial, tax, legal or credit advice.