Simple Interest vs. Compound Interest

Shawn Plummer

CEO, The Annuity Expert

Simple Interest Vs. Compound Interest Calculator

A Simple Interest vs. Compound Interest Calculator is a tool that helps you see the difference between two ways of calculating interest. With simple interest, you calculate the interest only on the original amount of money you borrow or invest. But with compound interest, you calculate interest on both the original amount and any interest you have already earned. This makes your money grow faster over time. The calculator lets you put in details like how much money you have, the interest rate, and how long you want to invest or borrow for. It then shows you how much interest you will earn or owe using both methods. This is useful for understanding how your money will grow or what you will owe in different situations.

Simple Interest Vs. Compound Interest

What is Simple Interest?

Simple Interest calculates the interest charge on a loan or investment based on the original principal amount and the interest rate. The formula is:

What is Compound Interest?

Compound Interest is calculated on the initial principal and also on the accumulated interest of previous periods. The formula varies based on the compounding frequency (annually, semi-annually, quarterly, etc.). The general formula is:

Simple Vs Compound Interest

Key Differences

  1. Interest Calculation: Simple interest is calculated only on the principal amount, while compound interest is calculated on the principal and the accumulated interest.
  2. Growth Over Time: Compound interest grows at a faster rate than simple interest, especially over long periods.
  3. Best Use: Simple interest is commonly used for short-term loans or investments. Compound interest is preferred for long-term investments due to its potential for higher returns.
Compound Interest Vs. Simple Interest


Understanding the difference between simple and compound interest is crucial for making informed financial decisions. Compound interest, with its feature of interest-on-interest, can significantly increase investment returns over time, especially for long-term goals. Contact us today for a free quote.

Simple Interest Vs. Compound Interest

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Frequently Asked Questions

What is the difference between simple interest and compound interest?

Simple interest is calculated based on the principal balance only, while compound interest takes into account both the principal balance and any interest that has already accumulated.

Shawn Plummer

CEO, The Annuity Expert

Shawn Plummer is a licensed financial professional, insurance agent, and annuity broker with over 14 years of first-hand experience with annuities and insurance. Since beginning his journey in 2009, he has been pivotal in selling and educating about annuities and insurance products. Still, he has also played an instrumental role in training financial advisors for a prestigious Fortune Global 500 insurance company, Allianz. His insights and expertise have made him a sought-after voice in the industry, leading to features in renowned publications such as Time Magazine, Bloomberg, Entrepreneur, Yahoo! Finance, MSN, SmartAsset, The Simple Dollar, U.S. News and World Report, Women’s Health Magazine, and many more. Shawn’s driving ambition? To simplify retirement planning, he ensures his clients understand their choices and secure the best insurance coverage at unbeatable rates.

The Annuity Expert is an independent online insurance agency servicing consumers across the United States. The goal is to help you take the guesswork out of retirement planning and find the best insurance coverage at the cheapest rates

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