Question 1

What does $1,000 grow to at 8% for 5 years?

Accepted Answer

$1,000 invested at 8% annual compound interest for 5 years grows to $1,469. Your original investment earns $469 in interest — a 46.9% total return and a 1.47× multiplier on your money.

Question 2

How long does it take to double money at 8%?

Accepted Answer

At 8% annual compound interest, your money doubles approximately every 9 years (the Rule of 72: 72 ÷ 8 = 9). Over 5 years, $1,000 has the potential to double 0.6 times.

Question 3

Is 8% a realistic return?

Accepted Answer

8% is a moderate return that aligns with long-term historical averages for diversified share portfolios. The ASX 200 has returned around 9–10% p.a. including dividends historically, so 8% is realistic over long periods after accounting for fees and portfolio mix.

Question 4

What's the effect of adding regular contributions?

Accepted Answer

These figures show a one-time lump sum of $1,000 with no additional contributions. Adding regular contributions compounds the growth dramatically. For example, adding $200/month to $1,000 at 8% 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 8% return and 2.5% inflation, your real return is approximately 5.5% p.a. In real terms, $1,469 in 5 years would buy meaningfully less than it does today.

Year	Balance	Interest
Yr 1	$1,080	+$80
Yr 2	$1,166	+$86
Yr 3	$1,260	+$93
Yr 4	$1,360	+$101
Yr 5	$1,469	+$109

Rate	Final balance	Interest earned	Multiplier
4%	$1,217	$217	1.22×
5%	$1,276	$276	1.28×
6%	$1,338	$338	1.34×
7%	$1,403	$403	1.40×
8% ◀	$1,469	$469	1.47×
9%	$1,539	$539	1.54×
10%	$1,611	$611	1.61×

Year	Balance	Interest this year	Total interest	Growth
Year 1	$1,080	+$80	$80	1.08×
Year 2	$1,166	+$86	$166	1.17×
Year 3	$1,260	+$93	$260	1.26×
Year 4	$1,360	+$101	$360	1.36×
Year 5	$1,469	+$109	$469	1.47×

Year	Balance	Interest
Yr 1	$1,080	+$80
Yr 2	$1,166	+$86
Yr 3	$1,260	+$93
Yr 4	$1,360	+$101
Yr 5	$1,469	+$109

$1,000 at 8% for 5 Years

How $1,000 grows at 8%

Year-by-year projection

Growth chart

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