Compound interest on 10,000 at 10% for 20 years
Investing 10,000 at 10% per year, compounded monthly, grows to 73,280.74 after 20 years — 63,280.74 in interest.
Grows to 73,280.74
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Full breakdown
| Future value (monthly compounding) | 73,280.74 |
| Interest earned | 63,280.74 |
| Growth multiple | 7.33× |
| Same with simple interest | 30,000 |
| Extra from compounding | 43,280.74 |
Step-by-step working
- Monthly rate = 10% ÷ 12 = 0.8333%
- Periods = 20 × 12 = 240
- A = 10000 × (1 + 0.008333)^240 = 73,280.74
A = P × (1 + r/n)^(n·t), n = 12
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