What is Simple Interest?
Simple interest is a quick and easy method of calculating the interest charge on a loan. Simple interest is determined by multiplying the daily interest rate by the principal by the number of days that elapse between payments.
Simple Interest Formula
The formula for simple interest is: SI = (P x R x T) / 100
Where:
- P = Principal amount
- R = Rate of interest per annum
- T = Time period in years
When is Simple Interest Used?
Simple interest is often used in short-term loans, such as payday loans or some personal loans. It is also used in certain types of savings accounts and certificates of deposit (CDs). Unlike compound interest, simple interest does not add the interest back to the principal, so the interest earned each period remains constant.
Advantages of Simple Interest
For borrowers, simple interest is generally advantageous because it results in lower total interest payments compared to compound interest. For lenders, it is easy to calculate and explain to customers. However, for long-term investors, simple interest is less desirable because it doesn't offer the exponential growth potential of compounding.
Our simple interest calculator helps you quickly figure out how much interest you will owe or earn. It's perfect for checking the math on a small loan or a basic savings plan. Just enter the principal, rate, and time to get your result instantly.