Question 1

Is 25 years long enough for $2,500 to double at 6 percent?

Accepted Answer

$2,500 reaches $5,000 after about 11.6 years. So 25 years is more than enough. A quick check is to divide 72 by the rate, which gives 12 years.

Question 2

What if the return on $2,500 over 25 years were one point lower than 6 percent?

Accepted Answer

At 5 percent the balance after 25 years is $8,703 instead of $11,162. One point higher gives $14,314.

Question 3

What is $11,162 worth after prices rise 2.5 percent a year?

Accepted Answer

If prices rise at 2.5 percent a year for 25 years the final balance has the buying power of about $6,021 in starting-year money. Enter your own inflation rate in the calculator to test other cases.

Question 4

What if you added $100 a month to $2,500 over 25 years?

Accepted Answer

The balance would reach $80,462 instead of $11,162. The deposits would add $30,000.

Year	Total put in	Balance
1	$2,500	$2,654
2	$2,500	$2,818
3	$2,500	$2,992
4	$2,500	$3,176
5	$2,500	$3,372
6	$2,500	$3,580
7	$2,500	$3,801
8	$2,500	$4,035
9	$2,500	$4,284
10	$2,500	$4,548
11	$2,500	$4,829
12	$2,500	$5,127
13	$2,500	$5,443
14	$2,500	$5,779
15	$2,500	$6,135
16	$2,500	$6,514
17	$2,500	$6,915
18	$2,500	$7,342
19	$2,500	$7,795
20	$2,500	$8,276
21	$2,500	$8,786
22	$2,500	$9,328
23	$2,500	$9,903
24	$2,500	$10,514
25	$2,500	$11,162

$2,500 Compound Interest Over 25 Years

How the growth is worked out

Worked example

Questions about this calculator

Is 25 years long enough for $2,500 to double at 6 percent?

What if the return on $2,500 over 25 years were one point lower than 6 percent?

What is $11,162 worth after prices rise 2.5 percent a year?

What if you added $100 a month to $2,500 over 25 years?

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