Investment Calculator

Compound interest is the interest calculated on the initial principal and also on the accumulated interest of previous periods. It’s often described as “interest on interest.” Unlike simple interest, which is calculated only on the principal amount, compound interest allows your investment to grow at an accelerated rate over time. The more frequently interest is compounded, the faster your investment grows. This calculator assumes monthly compounding, which is common for most investment accounts.

The amount you should invest each month depends on your financial goals, risk tolerance, and time horizon. A common guideline is to save 10-15% of your income for retirement, but this can vary based on your individual circumstances. Younger investors can often afford to take more risks and may benefit from more aggressive investment strategies, while those closer to retirement typically focus on preserving capital. This calculator can help you see how different contribution amounts affect your investment growth over time.

A good rate of return depends on the type of investment and the associated risk. Historically, the stock market has returned an average of about 7-10% annually after inflation. Bonds typically return 3-5%, while savings accounts might return 1-2%. Higher returns generally come with higher risk. It’s important to have a diversified portfolio that matches your risk tolerance and financial goals. This calculator allows you to experiment with different return rates to see how they affect your investment growth.

Inflation reduces the purchasing power of your money over time. If your investments don’t grow at a rate higher than inflation, you’re effectively losing money in terms of purchasing power. For example, with a 3% inflation rate, $100 today will only have the purchasing power of about $74 in 10 years. This calculator provides an inflation-adjusted final amount to help you understand the real value of your investment in today’s dollars. It’s important to consider inflation when setting long-term financial goals.

Taxes on investment gains depend on the type of investment and how long you hold it. Short-term capital gains (investments held for one year or less) are typically taxed at your ordinary income tax rate. Long-term capital gains (investments held for more than one year) are usually taxed at a lower rate, which varies based on your income level. Some investments, like those in retirement accounts, may have special tax treatment. This calculator provides an after-tax calculation based on the tax rate you specify, but you should consult with a tax professional for advice specific to your situation.