Question 1

What does $1,000 grow to at 7% for 15 years?

Accepted Answer

$1,000 invested at 7% annual compound interest for 15 years grows to $2,759. Your original investment earns $1,759 in interest — a 175.9% total return and a 2.76× multiplier on your money.

Question 2

How long does it take to double money at 7%?

Accepted Answer

At 7% annual compound interest, your money doubles approximately every 10.3 years (the Rule of 72: 72 ÷ 7 = 10.3). Over 15 years, $1,000 has the potential to double 1.5 times.

Question 3

Is 7% a realistic return?

Accepted Answer

7% 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 7% 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 7% for 15 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 7% return and 2.5% inflation, your real return is approximately 4.5% p.a. In real terms, $2,759 in 15 years would buy meaningfully less than it does today.

Year	Balance	Interest
Yr 1	$1,070	+$70
Yr 2	$1,145	+$75
Yr 3	$1,225	+$80
Yr 4	$1,311	+$86
Yr 5	$1,403	+$92
Yr 6	$1,501	+$98
Yr 7	$1,606	+$105
Yr 8	$1,718	+$112
Yr 9	$1,838	+$120
Yr 10	$1,967	+$129
Yr 11	$2,105	+$138
Yr 12	$2,252	+$147
Yr 13	$2,410	+$158
Yr 14	$2,579	+$169
Yr 15	$2,759	+$180

Rate	Final balance	Interest earned	Multiplier
4%	$1,801	$801	1.80×
5%	$2,079	$1,079	2.08×
6%	$2,397	$1,397	2.40×
7% ◀	$2,759	$1,759	2.76×
8%	$3,172	$2,172	3.17×
9%	$3,642	$2,642	3.64×
10%	$4,177	$3,177	4.18×

Year	Balance	Interest this year	Total interest	Growth
Year 1	$1,070	+$70	$70	1.07×
Year 2	$1,145	+$75	$145	1.14×
Year 3	$1,225	+$80	$225	1.23×
Year 4	$1,311	+$86	$311	1.31×
Year 5	$1,403	+$92	$403	1.40×
Year 6	$1,501	+$98	$501	1.50×
Year 7	$1,606	+$105	$606	1.61×
Year 8	$1,718	+$112	$718	1.72×
Year 9	$1,838	+$120	$838	1.84×
Year 10	$1,967	+$129	$967	1.97×
Year 11	$2,105	+$138	$1,105	2.10×
Year 12	$2,252	+$147	$1,252	2.25×
Year 13	$2,410	+$158	$1,410	2.41×
Year 14	$2,579	+$169	$1,579	2.58×
Year 15	$2,759	+$180	$1,759	2.76×

Year	Balance	Interest
Yr 1	$1,070	+$70
Yr 2	$1,145	+$75
Yr 3	$1,225	+$80
Yr 4	$1,311	+$86
Yr 5	$1,403	+$92
Yr 6	$1,501	+$98
Yr 7	$1,606	+$105
Yr 8	$1,718	+$112
Yr 9	$1,838	+$120
Yr 10	$1,967	+$129
Yr 11	$2,105	+$138
Yr 12	$2,252	+$147
Yr 13	$2,410	+$158
Yr 14	$2,579	+$169
Yr 15	$2,759	+$180

$1,000 at 7% for 15 Years

How $1,000 grows at 7%

Year-by-year projection

Growth chart

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