Interest Calculator

This Compound Interest Calculator can help determine the compound interest accumulation and final balances on both fixed principal amounts and additional periodic contributions. There are also optional factors available for consideration, such as the tax on interest income and inflation.

Modify the values and click the Calculate button to use

Initial investment

$

Annual contribution

$

Monthly contribution

$
Contribute at the of each compounding period

Interest rate

%

Compound

Investment length

Tax rate

%

Inflation rate

%

Results

Ending balance

Total principal $45,000.00
Total contributions $25,000.00

Total interest

Interest of initial investment $5,525.63
Interest of the contributions $4,009.56
Total interest $9,535.20
Buying power after inflation $47,042.54
Initial: 17%
Contributions: 37%
Interest: 46%

Growth Over Time

Principal
Contributions
Interest

Accumulation Schedule

Year Deposit Interest Ending balance
1 $25,000.00 $1,250.00 $26,250.00
2 $5,000.00 $1,562.50 $32,812.50
3 $5,000.00 $1,890.63 $39,703.13