Compound interest on 1,000 at 7% for 20 years
Investing 1,000 at 7% per year, compounded monthly, grows to 4,038.74 after 20 years — 3,038.74 in interest.
Grows to 4,038.74
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Full breakdown
| Future value (monthly compounding) | 4,038.74 |
| Interest earned | 3,038.74 |
| Growth multiple | 4.04× |
| Same with simple interest | 2,400 |
| Extra from compounding | 1,638.74 |
Step-by-step working
- Monthly rate = 7% ÷ 12 = 0.5833%
- Periods = 20 × 12 = 240
- A = 1000 × (1 + 0.005833)^240 = 4,038.74
A = P × (1 + r/n)^(n·t), n = 12
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