Compound Interest Calculator

Calculate your investment growth with compound interest over time

Your Investment

$0$10M
$0$100,000
1 year50 years
0%30%
Final Amount
$1,328,618
Total Contributions
$190,000
Interest Earned
$1,138,618

Year-by-Year Breakdown

YearPrincipalInterestTotal
0$10,000$0$10,000
1$16,000$1,330$17,330
2$22,000$3,427$25,427
3$28,000$6,373$34,373
4$34,000$10,255$44,255
5$40,000$15,172$55,172
6$46,000$21,232$67,232
7$52,000$28,554$80,554
8$58,000$37,272$95,272
9$64,000$47,531$111,531
10$70,000$59,493$129,493
11$76,000$73,335$149,335
12$82,000$89,255$171,255
13$88,000$107,471$195,471
14$94,000$128,222$222,222
15$100,000$151,774$251,774
16$106,000$178,421$284,421
17$112,000$208,487$320,487
18$118,000$242,329$360,329
19$124,000$280,342$404,342
20$130,000$322,965$452,965
21$136,000$370,679$506,679
22$142,000$424,018$566,018
23$148,000$483,570$631,570
24$154,000$549,987$703,987
25$160,000$623,986$783,986
26$166,000$706,363$872,363
27$172,000$797,993$969,993
28$178,000$899,847$1,077,847
29$184,000$1,012,994$1,196,994
30$190,000$1,138,618$1,328,618

Growth Over Time

Frequently Asked Questions

What is compound interest?

Compound interest is the interest calculated on the initial principal and also on the accumulated interest from previous periods. It's often called "interest on interest" and can significantly increase your investment over time.

How does compounding frequency affect my returns?

The more frequently interest is compounded, the more you'll earn. Monthly compounding will generate slightly higher returns than annual compounding, as interest is calculated and added to your principal more often.

What's a realistic annual return rate?

Historical stock market returns average around 10% annually. Conservative investments like bonds might return 4-6%, while aggressive stock portfolios could target 12-15%. Always consider your risk tolerance and investment timeline.

Should I prioritize initial investment or monthly contributions?

Both are important! Starting early with a larger initial investment gives you more time for compound growth. However, consistent monthly contributions can be just as powerful over time, especially if you're investing for 20+ years.

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Educational purposes only. Not financial advice.