Question 1

What does $100,000 grow to at 10% for 5 years?

Accepted Answer

$100,000 invested at 10% annual compound interest for 5 years grows to $161,051. Your original investment earns $61,051 in interest — a 61.1% total return and a 1.61× multiplier on your money.

Question 2

How long does it take to double money at 10%?

Accepted Answer

At 10% annual compound interest, your money doubles approximately every 7.2 years (the Rule of 72: 72 ÷ 10 = 7.2). Over 5 years, $100,000 has the potential to double 0.7 times.

Question 3

Is 10% a realistic return?

Accepted Answer

10% is an optimistic but achievable return for growth-oriented share portfolios over long time horizons. The ASX 200 has averaged around 9–10% p.a. including dividends. A 10% assumption requires patience and comfort with short-term market volatility.

Question 4

What's the effect of adding regular contributions?

Accepted Answer

These figures show a one-time lump sum of $100,000 with no additional contributions. Adding regular contributions compounds the growth dramatically. For example, adding $200/month to $100,000 at 10% 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 10% return and 2.5% inflation, your real return is approximately 7.5% p.a. In real terms, $161,051 in 5 years would buy meaningfully less than it does today.

Year	Balance	Interest
Yr 1	$110,000	+$10,000
Yr 2	$121,000	+$11,000
Yr 3	$133,100	+$12,100
Yr 4	$146,410	+$13,310
Yr 5	$161,051	+$14,641

Rate	Final balance	Interest earned	Multiplier
4%	$121,665	$21,665	1.22×
5%	$127,628	$27,628	1.28×
6%	$133,823	$33,823	1.34×
7%	$140,255	$40,255	1.40×
8%	$146,933	$46,933	1.47×
9%	$153,862	$53,862	1.54×
10% ◀	$161,051	$61,051	1.61×

Year	Balance	Interest this year	Total interest	Growth
Year 1	$110,000	+$10,000	$10,000	1.10×
Year 2	$121,000	+$11,000	$21,000	1.21×
Year 3	$133,100	+$12,100	$33,100	1.33×
Year 4	$146,410	+$13,310	$46,410	1.46×
Year 5	$161,051	+$14,641	$61,051	1.61×

Year	Balance	Interest
Yr 1	$110,000	+$10,000
Yr 2	$121,000	+$11,000
Yr 3	$133,100	+$12,100
Yr 4	$146,410	+$13,310
Yr 5	$161,051	+$14,641

$100,000 at 10% for 5 Years

How $100,000 grows at 10%

Year-by-year projection

Growth chart

Frequently asked questions

Explore other scenarios

Related calculators