Question 1

What does $1,000 grow to at 8% for 10 years?

Accepted Answer

$1,000 invested at 8% annual compound interest for 10 years grows to $2,159. Your original investment earns $1,159 in interest — a 115.9% total return and a 2.16× 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 10 years, $1,000 has the potential to double 1.1 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 10 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, $2,159 in 10 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
Yr 6	$1,587	+$118
Yr 7	$1,714	+$127
Yr 8	$1,851	+$137
Yr 9	$1,999	+$148
Yr 10	$2,159	+$160

Rate	Final balance	Interest earned	Multiplier
4%	$1,480	$480	1.48×
5%	$1,629	$629	1.63×
6%	$1,791	$791	1.79×
7%	$1,967	$967	1.97×
8% ◀	$2,159	$1,159	2.16×
9%	$2,367	$1,367	2.37×
10%	$2,594	$1,594	2.59×

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 6	$1,587	+$118	$587	1.59×
Year 7	$1,714	+$127	$714	1.71×
Year 8	$1,851	+$137	$851	1.85×
Year 9	$1,999	+$148	$999	2.00×
Year 10	$2,159	+$160	$1,159	2.16×

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
Yr 6	$1,587	+$118
Yr 7	$1,714	+$127
Yr 8	$1,851	+$137
Yr 9	$1,999	+$148
Yr 10	$2,159	+$160

$1,000 at 8% for 10 Years

How $1,000 grows at 8%

Year-by-year projection

Growth chart

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