How Long Does It Take to Double My Money at 7%?
The Short Answer
At 7% annual returns, your money doubles in about 10.3 years. This is easily estimated using the Rule of 72: 72 / 7 = 10.3 years.
The Detailed Breakdown
Based on the Rule of 72, a quick formula where 72 divided by the annual return gives approximate doubling time.
| Calculation | Value | Assumptions |
|---|---|---|
| Time to Double at 7% | 10.3 years | Rule of 72: 72 / 7 = 10.3 |
| Time to Double at 5% | 14.4 years | 72 / 5 = 14.4 |
| Time to Double at 10% | 7.2 years | 72 / 10 = 7.2 |
Key Assumptions
- Consistent 7% annual return.
- Compounding annually.
- No withdrawals or additional contributions.
- Rule of 72 is an approximation (actual: 10.24 years).
Adjust for Your Situation
At 7%, your investment doubles roughly every 10 years -- patience is key.
Use the Free CalculatorWhat Affects This Result
Return Rate
Higher returns dramatically shorten doubling time.
Taxes
Taxes on gains extend the effective doubling time.
Inflation
Real purchasing power doubles slower than nominal value.