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Home / Compound interest / $300 a month, 10 years

$300 a Month for 10 Years

What does $300 a month become over 10 years? The page starts at 6 percent a year with an empty account. Change any figure.

After 10 years the balance reaches $49,164. Interest supplies $13,164 of it.

$
$
%
years
%
Final balance
$49,164
Total you put in
$36,000
Interest earned
$13,164
Year by year
YearTotal put inBalance
1$3,600$3,701
2$7,200$7,630
3$10,800$11,801
4$14,400$16,229
5$18,000$20,931
6$21,600$25,923
7$25,200$31,222
8$28,800$36,849
9$32,400$42,822
10$36,000$49,164
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How the growth is worked out

The calculation runs month by month. The yearly return of 6 percent becomes a monthly rate of 0.5 percent. Each month the balance grows by that rate and then the deposit of $300 is added. Every deposit keeps growing for the rest of the 10 years.

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Worked example

A monthly deposit of $300 for 10 years comes to $36,000 of your own money. The ending balance is $49,164.

The deposits alone come to $36,000. Compounding turns that into $49,164, a gain of $13,164.

Questions about this calculator

How much would $600 a month reach over 10 years at 6 percent?

$98,328 at 6 percent. That is 2 times the balance from $300 a month.

What if the return on $300 a month over 10 years were 5 percent instead of 6?

The balance would be $46,585 instead of $49,164. A return one point higher gives $51,925.

What if you stopped the $300 deposits halfway through 10 years at 6 percent?

After 5 years the balance is $20,931. Left alone for the second half, it would grow to $28,233 instead of $49,164.

What would it take to match $49,164 over 10 years if you started 5 years later at 6 percent?

You would need $704.66 a month for 5 years instead of $300 for 10. Starting early does much of the work.

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This page is for education only and is not financial or tax advice.