Question 1

What does $500 grow to at 9% for 5 years?

Accepted Answer

$500 invested at 9% annual compound interest for 5 years grows to $769. Your original investment earns $269 in interest — a 53.9% total return and a 1.54× multiplier on your money.

Question 2

How long does it take to double money at 9%?

Accepted Answer

At 9% annual compound interest, your money doubles approximately every 8 years (the Rule of 72: 72 ÷ 9 = 8). Over 5 years, $500 has the potential to double 0.6 times.

Question 3

Is 9% a realistic return?

Accepted Answer

9% is an optimistic but achievable return for growth-oriented share portfolios over long time horizons. The ASX 200 has averaged around 9–10% p.a. including dividends. A 9% assumption requires patience and comfort with short-term market volatility.

Question 4

What's the effect of adding regular contributions?

Accepted Answer

These figures show a one-time lump sum of $500 with no additional contributions. Adding regular contributions compounds the growth dramatically. For example, adding $200/month to $500 at 9% for 5 years would result in a significantly larger final balance. Use the interactive calculator above to model your own contribution amount.

Question 5

How does inflation affect this result?

Accepted Answer

This calculator shows nominal returns — the dollar figures before adjusting for inflation. Australia's historical inflation rate is around 2–3% per year. To estimate real purchasing power, subtract the inflation rate from your return: at 9% return and 2.5% inflation, your real return is approximately 6.5% p.a. In real terms, $769 in 5 years would buy meaningfully less than it does today.

Year	Balance	Interest
Yr 1	$545	+$45
Yr 2	$594	+$49
Yr 3	$648	+$53
Yr 4	$706	+$58
Yr 5	$769	+$64

Rate	Final balance	Interest earned	Multiplier
4%	$608	$108	1.22×
5%	$638	$138	1.28×
6%	$669	$169	1.34×
7%	$701	$201	1.40×
8%	$735	$235	1.47×
9% ◀	$769	$269	1.54×
10%	$805	$305	1.61×

Year	Balance	Interest this year	Total interest	Growth
Year 1	$545	+$45	$45	1.09×
Year 2	$594	+$49	$94	1.19×
Year 3	$648	+$53	$148	1.30×
Year 4	$706	+$58	$206	1.41×
Year 5	$769	+$64	$269	1.54×

Year	Balance	Interest
Yr 1	$545	+$45
Yr 2	$594	+$49
Yr 3	$648	+$53
Yr 4	$706	+$58
Yr 5	$769	+$64

$500 at 9% for 5 Years

How $500 grows at 9%

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