Year-by-Year Breakdown
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Investment Growth Calculator — See How Your Money Grows
Compound interest is often called the eighth wonder of the world — and for good reason. Our Investment Growth Calculator demonstrates how your money can grow exponentially over time through the combined effects of regular contributions and compound returns. Whether you're investing in stocks, bonds, mutual funds, or a high-yield savings account, this tool shows you the projected growth of your portfolio.
Enter your initial investment, monthly contributions, expected annual return, and investment horizon to see a detailed year-by-year breakdown. The results include your future value, total contributions, investment growth, and a growth multiple showing how many times your money has multiplied.
The Compound Interest Formula
How to Use the Investment Growth Calculator
- Enter your initial investmentThe lump sum you.re starting with (e.g., $10,000 from savings or a bonus).
- Add monthly contributionsHow much you plan to add each month. Even small amounts compound significantly over time.
- Set your expected return rateHistorical stock market average is ~8-10% annually. Adjust based on your investment mix.
- Choose your time horizonThe longer you invest, the more compound interest works in your favor.
- Click CalculateSee your projected future value and a detailed year-by-year growth table.
Frequently Asked Questions
The S&P 500 has historically returned about 10% annually before inflation (7% after inflation). A diversified portfolio of stocks and bonds might return 6-8%. For conservative investments like bonds or CDs, expect 3-5%. Use these benchmarks to set realistic expectations.
Compound interest means you earn interest on your interest. In Year 1, you earn interest on your principal. In Year 2, you earn interest on your principal plus Year 1's interest. This creates exponential growth — the longer you stay invested, the faster your money grows.
Statistically, lump-sum investing outperforms dollar-cost averaging about 2/3 of the time. However, DCA reduces the risk of investing everything at a market peak. If you have a large sum but are nervous about timing, DCA over 6-12 months is a reasonable approach.
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