Question 1

What does $1,000 grow to at 5% for 15 years?

Accepted Answer

$1,000 invested at 5% annual compound interest for 15 years grows to $2,079. Your original investment earns $1,079 in interest — a 107.9% total return and a 2.08× multiplier on your money.

Question 2

How long does it take to double money at 5%?

Accepted Answer

At 5% annual compound interest, your money doubles approximately every 14.4 years (the Rule of 72: 72 ÷ 5 = 14.4). Over 15 years, $1,000 has the potential to double 1.0 times.

Question 3

Is 5% a realistic return?

Accepted Answer

5% is a conservative assumption achievable through high-interest savings accounts or term deposits. It's a realistic baseline for low-risk investments, though actual rates vary with market conditions.

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 5% 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 5% return and 2.5% inflation, your real return is approximately 2.5% p.a. In real terms, $2,079 in 15 years would buy meaningfully less than it does today.

Year	Balance	Interest
Yr 1	$1,050	+$50
Yr 2	$1,103	+$53
Yr 3	$1,158	+$55
Yr 4	$1,216	+$58
Yr 5	$1,276	+$61
Yr 6	$1,340	+$64
Yr 7	$1,407	+$67
Yr 8	$1,477	+$70
Yr 9	$1,551	+$74
Yr 10	$1,629	+$78
Yr 11	$1,710	+$81
Yr 12	$1,796	+$86
Yr 13	$1,886	+$90
Yr 14	$1,980	+$94
Yr 15	$2,079	+$99

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	$1,050	+$50	$50	1.05×
Year 2	$1,103	+$53	$103	1.10×
Year 3	$1,158	+$55	$158	1.16×
Year 4	$1,216	+$58	$216	1.22×
Year 5	$1,276	+$61	$276	1.28×
Year 6	$1,340	+$64	$340	1.34×
Year 7	$1,407	+$67	$407	1.41×
Year 8	$1,477	+$70	$477	1.48×
Year 9	$1,551	+$74	$551	1.55×
Year 10	$1,629	+$78	$629	1.63×
Year 11	$1,710	+$81	$710	1.71×
Year 12	$1,796	+$86	$796	1.80×
Year 13	$1,886	+$90	$886	1.89×
Year 14	$1,980	+$94	$980	1.98×
Year 15	$2,079	+$99	$1,079	2.08×

Year	Balance	Interest
Yr 1	$1,050	+$50
Yr 2	$1,103	+$53
Yr 3	$1,158	+$55
Yr 4	$1,216	+$58
Yr 5	$1,276	+$61
Yr 6	$1,340	+$64
Yr 7	$1,407	+$67
Yr 8	$1,477	+$70
Yr 9	$1,551	+$74
Yr 10	$1,629	+$78
Yr 11	$1,710	+$81
Yr 12	$1,796	+$86
Yr 13	$1,886	+$90
Yr 14	$1,980	+$94
Yr 15	$2,079	+$99

$1,000 at 5% for 15 Years

How $1,000 grows at 5%

Year-by-year projection

Growth chart

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