🌱 Compound Interest Calculator
Compound interest is growth on top of growth: your returns start earning returns of their own. Enter a starting amount, a monthly contribution, an expected yearly return and a number of years to see how the balance could build up over time.
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How to use the compound interest calculator
- Enter what you are starting with today.
- Add how much you plan to put in every month.
- Choose an assumed yearly return and how often it compounds.
- Pick the number of years and read the final balance, total contributions and total growth.
Strategies that use this tool
Dollar-Cost Averaging
Dollar-cost averaging means investing the same amount of money on a regular schedule, no matter what the market is doing. It takes the guesswork out of timing and turns investing into a calm, repeatable habit.
🧺Buy and Hold Index Investing
Buy and hold index investing means owning low-cost funds that track a whole market and keeping them for the long run. Instead of hunting for winners, you own a slice of everything and let broad economic growth do the heavy lifting.
⚖️The 60/40 Portfolio
The 60/40 portfolio holds about 60% in stocks for growth and 40% in bonds for stability. It is a classic balanced approach designed to smooth the ride while still aiming for long-term growth.
🪐Core-Satellite Investing
Core-satellite investing keeps most of your money in a steady, diversified core while a smaller slice goes into satellite ideas you are excited about. It blends the reliability of index investing with room for personal conviction.
Frequently asked questions
What is compound interest?
It is interest earned on both your original money and the interest it has already earned, so growth speeds up over time.
What return should I use?
Use a cautious assumption. Returns are never guaranteed and real markets move up and down from year to year.
Does compounding frequency matter?
A little. More frequent compounding adds slightly more growth, but the return rate and time matter far more.