Simple vs Compound Interest: $25,000 at 4% for 15 Years
Comparing $25,000 at 4% over 15 years: simple interest adds $15,000 while compound interest grows it to about $45,047.
How to use this tool
- Enter principal, annual interest rate and years in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your compound balance and the full breakdown beneath it.
Compare simple and compound interest outcomes for a $25,000 investment at 4% over 15 years.
Frequently asked questions
- When do simple and compound give the same result?
- At t = 1 year (with annual compounding) they are identical. Beyond year 1 compound interest always exceeds simple interest for positive rates.
- Which does a bank savings account use?
- Most savings accounts and mortgages use compound interest. Some short-term loans and bonds use simple interest.