Building wealth asks you to think beyond the next payday. Compounding is one reason time gets so much attention: growth can become part of the amount that earns future growth.
The idea is straightforward. The outcome depends on what actually happens to your money.
Start with a simple example.
Imagine $1,000 earning a hypothetical 5% a year, with the earnings left in the account. After the first year, you have $1,050. In the second year, 5% of that larger balance is $52.50, taking the total to $1,102.50.
That example assumes the same rate each year, annual compounding, no fees or taxes, and no withdrawals. It shows the maths, rather than a return you can expect from an investment.
Know what can change the result.
Investment returns vary and can be negative. Fees and taxes reduce what you keep, while inflation affects what your money can buy. The rate you put into a calculator is an assumption, so try different outcomes when exploring a projection.
Connect the time frame to your plans.
Money you need soon has a different job from money you’re setting aside for much later. Market falls can leave you with less when it’s time to withdraw. Give your time frame, access needs, and ability to handle losses a place in the decision.
Look at contributions and costs together.
Adding money regularly can build the amount you’re working with. Check how the fees apply to each contribution and what ongoing charges might take out. The contribution you can sustain matters as much as the projection you like looking at.
Get comfortable with the numbers.
A hypothetical 5% gain followed by a 5% loss takes $100 to $99.75. The percentages act on different starting balances. Working through examples like this helps you see why investing rarely looks as tidy as a straight line.
Give the long game a closer look.
Try a compounding example with a few different rates and time frames. Write down what the calculation assumes, what costs it leaves out, and how the result changes.
Explore the basics with Moneysmart’s compound interest guide. Learn what the numbers are telling you, then bring that understanding to your own plans.
General educational content only—not personalised financial advice. Risks, laws and circumstances vary. Do your own research or seek qualified advice if needed.
