Simple & compound interest
Compare simple and compound interest and after-tax totals using a fixed annual rate and chosen compounding frequency. Files and entered content are not sent to or stored on a server.
How to use
Compare simple and compound interest and after-tax totals using a fixed annual rate and chosen compounding frequency.
Please note
1–1,200 months. Uses a 12-month year and fractional-period exponents; excludes deposits, fees and daily calendar conventions.
Simple & compound interest User guide
Instructions
- Enter principal, annual rate and the period in months.
- Choose compounding and enter the tax rate on interest, if any.
- Compare before-tax interest and after-tax totals.
Example
Input / settings
Principal 1,000 · 12% · 12 months · monthly · no tax
Result / checks
Simple 1,120 · compound approximately 1,126.825
Please note
- 1–1,200 months. Uses a 12-month year and fractional-period exponents; excludes deposits, fees and daily calendar conventions.
- Inputs stay in this browser. Results update immediately and can be copied without creating a file.