Question 1

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

Accepted Answer

$5,000 invested at 5% annual compound interest for 15 years grows to $10,395. Your original investment earns $5,395 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, $5,000 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 $5,000 with no additional contributions. Adding regular contributions compounds the growth dramatically. For example, adding $200/month to $5,000 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, $10,395 in 15 years would buy meaningfully less than it does today.

Year	Balance	Interest
Yr 1	$5,250	+$250
Yr 2	$5,513	+$263
Yr 3	$5,788	+$276
Yr 4	$6,078	+$289
Yr 5	$6,381	+$304
Yr 6	$6,700	+$319
Yr 7	$7,036	+$335
Yr 8	$7,387	+$352
Yr 9	$7,757	+$369
Yr 10	$8,144	+$388
Yr 11	$8,552	+$407
Yr 12	$8,979	+$428
Yr 13	$9,428	+$449
Yr 14	$9,900	+$471
Yr 15	$10,395	+$495

Rate	Final balance	Interest earned	Multiplier
4%	$9,005	$4,005	1.80×
5% ◀	$10,395	$5,395	2.08×
6%	$11,983	$6,983	2.40×
7%	$13,795	$8,795	2.76×
8%	$15,861	$10,861	3.17×
9%	$18,212	$13,212	3.64×
10%	$20,886	$15,886	4.18×

Year	Balance	Interest this year	Total interest	Growth
Year 1	$5,250	+$250	$250	1.05×
Year 2	$5,513	+$263	$513	1.10×
Year 3	$5,788	+$276	$788	1.16×
Year 4	$6,078	+$289	$1,078	1.22×
Year 5	$6,381	+$304	$1,381	1.28×
Year 6	$6,700	+$319	$1,700	1.34×
Year 7	$7,036	+$335	$2,036	1.41×
Year 8	$7,387	+$352	$2,387	1.48×
Year 9	$7,757	+$369	$2,757	1.55×
Year 10	$8,144	+$388	$3,144	1.63×
Year 11	$8,552	+$407	$3,552	1.71×
Year 12	$8,979	+$428	$3,979	1.80×
Year 13	$9,428	+$449	$4,428	1.89×
Year 14	$9,900	+$471	$4,900	1.98×
Year 15	$10,395	+$495	$5,395	2.08×

Year	Balance	Interest
Yr 1	$5,250	+$250
Yr 2	$5,513	+$263
Yr 3	$5,788	+$276
Yr 4	$6,078	+$289
Yr 5	$6,381	+$304
Yr 6	$6,700	+$319
Yr 7	$7,036	+$335
Yr 8	$7,387	+$352
Yr 9	$7,757	+$369
Yr 10	$8,144	+$388
Yr 11	$8,552	+$407
Yr 12	$8,979	+$428
Yr 13	$9,428	+$449
Yr 14	$9,900	+$471
Yr 15	$10,395	+$495

$5,000 at 5% for 15 Years

How $5,000 grows at 5%

Year-by-year projection

Growth chart

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