Your Result
Years to Double Your Money
9
72 ÷ 8 = 9 years
At an 8% annual return, your investment doubles in about 9 years. A $10,000 balance would grow to roughly $20,000 in that time, then double again to about $40,000 after 18 years — assuming the rate stays constant and earnings are reinvested.
| Annual Return |
Calculation |
Years to Double |
| 4% | 72 ÷ 4 | 18 years |
| 6% | 72 ÷ 6 | 12 years |
| 8% | 72 ÷ 8 | 9 years |
| 10% | 72 ÷ 10 | 7.2 years |
| 12% | 72 ÷ 12 | 6 years |