$1,000 at 4% for 20 Years
$1,000 invested at 4% a year grows to $2,191 after 20 years. That is $1,191 of interest.
Final balance
$2,191
compounded yearly
With monthly compounding
$2,223
Total interest
$1,191
119% growth
Money doubles every
17.7 years
Year by year
| Year | Balance | Interest that year | Total interest |
|---|---|---|---|
| 0 | $1,000 | $0 | $0 |
| 1 | $1,040 | $40 | $40 |
| 2 | $1,082 | $42 | $82 |
| 3 | $1,125 | $43 | $125 |
| 4 | $1,170 | $45 | $170 |
| 5 | $1,217 | $47 | $217 |
| 6 | $1,265 | $49 | $265 |
| 7 | $1,316 | $51 | $316 |
| 8 | $1,369 | $53 | $369 |
| 9 | $1,423 | $55 | $423 |
| 10 | $1,480 | $57 | $480 |
| 11 | $1,539 | $59 | $539 |
| 12 | $1,601 | $62 | $601 |
| 13 | $1,665 | $64 | $665 |
| 14 | $1,732 | $67 | $732 |
| 15 | $1,801 | $69 | $801 |
| 16 | $1,873 | $72 | $873 |
| 17 | $1,948 | $75 | $948 |
| 18 | $2,026 | $78 | $1,026 |
| 19 | $2,107 | $81 | $1,107 |
| 20 | $2,191 | $84 | $1,191 |
What this shows
In year one the interest is $40. In the final year it is $84.
Same rate, same starting amount. The difference is compounding.
Add regular deposits or change any number in the compound interest calculator.
Change one thing
Other rates for $1,000 over 20 years
Other time frames for $1,000 at 4%
Other amounts at 4% for 20 years
This is not financial advice. Nothing on this site is investment, tax, legal or financial advice of any kind.
The calculators give simplified estimates from the numbers you enter. They ignore taxes, fees, rate changes and real market returns, and they can be wrong.
Do not make financial decisions based on these results. Speak to a licensed financial adviser, accountant or lender before acting, and read the full disclaimer.