Question 1

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

Accepted Answer

$100,000 invested at 5% annual compound interest for 10 years grows to $162,889. Your original investment earns $62,889 in interest — a 62.9% total return and a 1.63× 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 10 years, $100,000 has the potential to double 0.7 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 $100,000 with no additional contributions. Adding regular contributions compounds the growth dramatically. For example, adding $200/month to $100,000 at 5% 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 5% return and 2.5% inflation, your real return is approximately 2.5% p.a. In real terms, $162,889 in 10 years would buy meaningfully less than it does today.

Year	Balance	Interest
Yr 1	$105,000	+$5,000
Yr 2	$110,250	+$5,250
Yr 3	$115,763	+$5,513
Yr 4	$121,551	+$5,788
Yr 5	$127,628	+$6,078
Yr 6	$134,010	+$6,381
Yr 7	$140,710	+$6,700
Yr 8	$147,746	+$7,036
Yr 9	$155,133	+$7,387
Yr 10	$162,889	+$7,757

Rate	Final balance	Interest earned	Multiplier
4%	$148,024	$48,024	1.48×
5% ◀	$162,889	$62,889	1.63×
6%	$179,085	$79,085	1.79×
7%	$196,715	$96,715	1.97×
8%	$215,892	$115,892	2.16×
9%	$236,736	$136,736	2.37×
10%	$259,374	$159,374	2.59×

Year	Balance	Interest this year	Total interest	Growth
Year 1	$105,000	+$5,000	$5,000	1.05×
Year 2	$110,250	+$5,250	$10,250	1.10×
Year 3	$115,763	+$5,513	$15,763	1.16×
Year 4	$121,551	+$5,788	$21,551	1.22×
Year 5	$127,628	+$6,078	$27,628	1.28×
Year 6	$134,010	+$6,381	$34,010	1.34×
Year 7	$140,710	+$6,700	$40,710	1.41×
Year 8	$147,746	+$7,036	$47,746	1.48×
Year 9	$155,133	+$7,387	$55,133	1.55×
Year 10	$162,889	+$7,757	$62,889	1.63×

Year	Balance	Interest
Yr 1	$105,000	+$5,000
Yr 2	$110,250	+$5,250
Yr 3	$115,763	+$5,513
Yr 4	$121,551	+$5,788
Yr 5	$127,628	+$6,078
Yr 6	$134,010	+$6,381
Yr 7	$140,710	+$6,700
Yr 8	$147,746	+$7,036
Yr 9	$155,133	+$7,387
Yr 10	$162,889	+$7,757

$100,000 at 5% for 10 Years

How $100,000 grows at 5%

Year-by-year projection

Growth chart

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