Investment Calculator

An investment calculator helps you project how your money can grow over time based on initial investment, regular contributions, expected return rate, and time horizon. It uses compound growth formulas to estimate future portfolio value, helping you plan for financial goals.

Historically, the S&P 500 has averaged about 10% annually before inflation (7% after). However, returns vary by investment type: stocks (8-12%), bonds (4-6%), real estate (8-12%), savings accounts (1-4%). Conservative estimates use 6-7%, aggressive use 8-10%.

Inflation reduces the purchasing power of your money over time. At 3% inflation, $100,000 in 20 years buys what $55,000 does today. Real returns = nominal returns minus inflation. A 7% return with 3% inflation gives 4% real return.

Statistically, lump sum investing outperforms dollar-cost averaging about 2/3 of the time because markets tend to rise. However, DCA reduces risk of investing at a market peak and provides psychological comfort. For most people, regular monthly investing through DCA is practical and effective.

A common guideline is to invest 10-20% of your gross income. At minimum, contribute enough to get your employer 401k match (typically 3-6%). The 50/30/20 rule suggests 20% for savings/investments. Start with what you can afford and increase over time.

Compound growth means earning returns on your returns. $10,000 growing at 8% becomes $21,589 in 10 years and $46,610 in 20 years - more than doubling in the second decade due to compounding. Time is the most important factor in wealth building.