Question 1

What does $1,000 grow to at 8% for 30 years?

Accepted Answer

$1,000 invested at 8% annual compound interest for 30 years grows to $10,063. Your original investment earns $9,063 in interest — a 906.3% total return and a 10.06× multiplier on your money.

Question 2

How long does it take to double money at 8%?

Accepted Answer

At 8% annual compound interest, your money doubles approximately every 9 years (the Rule of 72: 72 ÷ 8 = 9). Over 30 years, $1,000 has the potential to double 3.3 times.

Question 3

Is 8% a realistic return?

Accepted Answer

8% 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 8% 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 8% for 30 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 8% return and 2.5% inflation, your real return is approximately 5.5% p.a. In real terms, $10,063 in 30 years would buy meaningfully less than it does today.

Year	Balance	Interest
Yr 1	$1,080	+$80
Yr 2	$1,166	+$86
Yr 3	$1,260	+$93
Yr 4	$1,360	+$101
Yr 5	$1,469	+$109
Yr 6	$1,587	+$118
Yr 7	$1,714	+$127
Yr 8	$1,851	+$137
Yr 9	$1,999	+$148
Yr 10	$2,159	+$160
Yr 11	$2,332	+$173
Yr 12	$2,518	+$187
Yr 13	$2,720	+$201
Yr 14	$2,937	+$218
Yr 15	$3,172	+$235
Yr 16	$3,426	+$254
Yr 17	$3,700	+$274
Yr 18	$3,996	+$296
Yr 19	$4,316	+$320
Yr 20	$4,661	+$345
Yr 21	$5,034	+$373
Yr 22	$5,437	+$403
Yr 23	$5,871	+$435
Yr 24	$6,341	+$470
Yr 25	$6,848	+$507
Yr 26	$7,396	+$548
Yr 27	$7,988	+$592
Yr 28	$8,627	+$639
Yr 29	$9,317	+$690
Yr 30	$10,063	+$745

Rate	Final balance	Interest earned	Multiplier
4%	$3,243	$2,243	3.24×
5%	$4,322	$3,322	4.32×
6%	$5,743	$4,743	5.74×
7%	$7,612	$6,612	7.61×
8% ◀	$10,063	$9,063	10.06×
9%	$13,268	$12,268	13.27×
10%	$17,449	$16,449	17.45×

Year	Balance	Interest this year	Total interest	Growth
Year 1	$1,080	+$80	$80	1.08×
Year 2	$1,166	+$86	$166	1.17×
Year 3	$1,260	+$93	$260	1.26×
Year 4	$1,360	+$101	$360	1.36×
Year 5	$1,469	+$109	$469	1.47×
Year 6	$1,587	+$118	$587	1.59×
Year 7	$1,714	+$127	$714	1.71×
Year 8	$1,851	+$137	$851	1.85×
Year 9	$1,999	+$148	$999	2.00×
Year 10	$2,159	+$160	$1,159	2.16×
Year 11	$2,332	+$173	$1,332	2.33×
Year 12	$2,518	+$187	$1,518	2.52×
Year 13	$2,720	+$201	$1,720	2.72×
Year 14	$2,937	+$218	$1,937	2.94×
Year 15	$3,172	+$235	$2,172	3.17×
Year 16	$3,426	+$254	$2,426	3.43×
Year 17	$3,700	+$274	$2,700	3.70×
Year 18	$3,996	+$296	$2,996	4.00×
Year 19	$4,316	+$320	$3,316	4.32×
Year 20	$4,661	+$345	$3,661	4.66×
Year 21	$5,034	+$373	$4,034	5.03×
Year 22	$5,437	+$403	$4,437	5.44×
Year 23	$5,871	+$435	$4,871	5.87×
Year 24	$6,341	+$470	$5,341	6.34×
Year 25	$6,848	+$507	$5,848	6.85×
Year 26	$7,396	+$548	$6,396	7.40×
Year 27	$7,988	+$592	$6,988	7.99×
Year 28	$8,627	+$639	$7,627	8.63×
Year 29	$9,317	+$690	$8,317	9.32×
Year 30	$10,063	+$745	$9,063	10.06×

Year	Balance	Interest
Yr 1	$1,080	+$80
Yr 2	$1,166	+$86
Yr 3	$1,260	+$93
Yr 4	$1,360	+$101
Yr 5	$1,469	+$109
Yr 6	$1,587	+$118
Yr 7	$1,714	+$127
Yr 8	$1,851	+$137
Yr 9	$1,999	+$148
Yr 10	$2,159	+$160
Yr 11	$2,332	+$173
Yr 12	$2,518	+$187
Yr 13	$2,720	+$201
Yr 14	$2,937	+$218
Yr 15	$3,172	+$235
Yr 16	$3,426	+$254
Yr 17	$3,700	+$274
Yr 18	$3,996	+$296
Yr 19	$4,316	+$320
Yr 20	$4,661	+$345
Yr 21	$5,034	+$373
Yr 22	$5,437	+$403
Yr 23	$5,871	+$435
Yr 24	$6,341	+$470
Yr 25	$6,848	+$507
Yr 26	$7,396	+$548
Yr 27	$7,988	+$592
Yr 28	$8,627	+$639
Yr 29	$9,317	+$690
Yr 30	$10,063	+$745

$1,000 at 8% for 30 Years

How $1,000 grows at 8%

Year-by-year projection

Growth chart

Frequently asked questions

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