Interest Rate Calculator
Calculate the interest rate required to grow an investment from its current value to a target value over a specified time period.
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Required Annual Return
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Total Gain Needed
Finding the Required Rate of Return
The required rate of return tells you how fast your money needs to grow to reach a financial goal. The formula is: Rate = (FV/PV)1/n - 1, where FV is future value, PV is present value, and n is years.
Is Your Target Realistic?
Historical returns by asset class: stocks average 7-10% annually, bonds 3-5%, real estate 8-12%, savings accounts 4-5%. If your required rate exceeds 10-12%, you may need to extend your timeline, increase your starting amount, or add regular contributions.
Frequently Asked Questions
What rate of return can I realistically expect?
For diversified stock portfolios, 7-10% annually over long periods. Bonds: 3-5%. A balanced portfolio: 5-7%. Returns above 12% sustained over decades are extremely rare.
Does this include inflation?
No. For inflation-adjusted planning, the real return is roughly 4-7% for stocks. Subtract 2-3% from nominal returns to estimate real purchasing power growth.