Simple Interest Calculator

How to Find Simple Interest Rate: Definition, Formula & Examples

Compound interest is used more frequently in most real-world scenarios. It creates a tally of money owned, earned, or otherwise accrued through an interest rate that multiplies by the principal amount plus the previous period’s interest amount. VIP Industries Ltd has taken a Long-term borrowing of INR 15,00,000 with an interest rate of 10% per annum from Yes Bank. Calculate the simple interest paid by ABC VIP Industries Ltd after 2 years and also find out the total amount paid by the Company at the end of tenure. ABC Ltd has taken a Long-term borrowing of INR 10,00,000 with an interest rate of 5.5% per annum from DCB Bank. Calculate the simple interest paid by ABC Ltd. after 6 years and also find out the total amount paid by the Company at the end of tenure. Interest rates are influenced by the demand for, and supply of, credit in an economy.

To determine your monthly payment, divide $35,000 by 24 . To determine the interest rate, divide the interest ($3,000) by the product of the principal ($30,000) times the years .

For a lender, compound interest is advantageous, as the total interest expense over the life of the loan will be greater. Note that the interest rate (5%) appears as a decimal (.05).

Calculating Interest And Excel Functions:

There may be times when you know the amount of interest earned on a given principal over a certain length of time, but you don’t know the rate. For instance, this might happen when family members lend or borrow money among themselves instead of dealing with a bank. In the next example, we’ll show how to solve for the rate. For example, suppose you are developing a mobile finance application. One of the features you want to include to make your app stand out above the rest is an interest calculator that integrates into the customer’s checkbook. In this scenario, understanding how the simple interest formula and compound interest formula calculate interest will help you program the feature correctly.

  • Loans are usually made for a certain number of years, represented by “t” in the simple interest equation.
  • The remaining number is the decimal version of the percentage.
  • Any such charges shall be in addition to the loan amount requested and/or approved and shall be fully disclosed to the applicant on his/her loan agreement.
  • Deb Russell is a school principal and teacher with over 25 years of experience teaching mathematics at all levels.
  • Find the principal invested if $178 interest was earned in 2 years at an interest rate of 4%.

Conversely, if you pay the loan late, more of your payment goes toward interest than if you pay on time. Using the same automobile loan example, if your payment is due on May 1 and you make it on May 16, you get charged for 45 days of interest at a cost of $92.46. This means only $207.54 of your $300 payment goes toward the principal. If you consistently pay late over the life of a loan, your final payment will be larger than the original estimate because you did not pay down the principal at the expected rate. Simple interest rate is the ratio expressing the accruable interest on a loan regardless of other financial actors. Learn the formula and how it is applied to several examples of loans with various interest rates.

For instance, if it’s a 1-year loan, divide the interest by 12. For instance, if you borrowed $100 at 8%, you’d multiply the $100 by 1.08. The 1 is the principal amount and then .08 is the 8% interest, so you’d get $108. In Julie’s car loan example, she was offered an interest rate of 7%. Once the decimal conversion is complete, the remaining numbers can be plugged into their appropriate place in the simple interest formula. The interest rate refers to the percentage of the principal that will be accrued over time additionally.

Practice Exercises: Interest Rates

The rate of interest is usually expressed as a percent per year, and is calculated by using the decimal equivalent of the percent. The variable for time, t, represents the number of years the money is left in the account. Because simple interest is calculated regularly, individuals who repay their loans on time or in advance each month gain the most. For example, for a principal amount of ₹15,000 at an annual interest rate of 5%, if you make a payment of ₹300 on May 1, ₹238.36 will be applied to the principal.

For simply interest loans you can use this loan calculator. Click hereto use this helpful loan calculator and use it as a reference when calculating simple interest.

How to Find Simple Interest Rate: Definition, Formula & Examples

Department of State Fulbright research awardee in the field of financial technology. He educates business students on topics in accounting and corporate finance.


Simple interest calculates the net amount which needs to be paid against the loan taken by the Borrower as Interest Cost, which is pre-decided by the Lender and Borrower. For example, when money is deposited in banks, it is in turn used by banks for investment activities or to lend it elsewhere.

To determine how much he’ll make, Jose multiplies $1,500 by 5% by two years, or $1,500 x .05 x 2. With this formula he determines that the CD will pay him $150 at the end of its term, bringing his money to $1,650. In reality, however, most CDs offer compound interest, so both Jose and Ayesha may have considered shopping around a little more. Understanding how interest is calculated will help you make more informed decisions when taking out a loan, using credit, and investing. If you have questions about simple interest, we have answers. Calculating simple interest will help you understand your monthly payments on a loan.

Interest rate can also refer to the rate paid by the bank to its clients for keeping deposits in the bank. One way to calculate the future value would be to just find the interest and then add it to the principal.

To solve a simple interest problem, first determine what the original amount or principal is. Then determine how fast the loan is growing, or the rate.

Compounding is the effect of earning interest on the interest that was previously earned. As shown in the previous example, no amount was earned on the interest that was earned in prior years.


FREE INVESTMENT BANKING COURSELearn the foundation of Investment banking, financial modeling, valuations and more. Returns calculated How to Find Simple Interest Rate: Definition, Formula & Examples under simple interest will always be less than returns calculated under compound interest as it ignores the concept of compounding.

How to Find Simple Interest Rate: Definition, Formula & Examples

We may also ask to see your driver’s license or other identifying documents. Thus ABC Bank will earn a total interest of $500 on the certificates of deposits on maturity, i.e., after 6 months. Simple InterestSimple interest refers to the percentage of interest charged or yielded on the principal sum for a specific period.

Calculating Interest Earned When Principal, Rate, And Time Are Known

Remember that all time must be converted into one full year. So we cannot use 6 as the time, because that would indicate 6 years. We use 6 divided by 12 because that indicated half a year, which is equivalent to 6 months. For example, let’s say that your brother decides not to replace his old car and instead invests the $2,000 proposed down payment, earning 3.5 percent interest. †We offer personal loans from $1,000 to $25,000, with loans terms from 12 to 60 months. Minimum and maximum amounts dependent on an applicant’s state of residence and the underwriting of the loan.

How to Find Simple Interest Rate: Definition, Formula & Examples

Because simple interest is often calculated on a daily basis, it mostly benefits consumers who pay their bills or loans on time or early each month. When you make a payment on a simple interest loan, the payment first goes toward that month’s interest, and the remainder goes toward the principal. Each month’s interest is paid in full so it never accrues. In contrast, compound interest adds some of the monthly interest back onto the loan; in each succeeding month, you pay new interest on old interest. Your intermediate accounting textbook also shows the formulas the tables are built on.

If this is accrued yearly at a rate of, what was the initial balance of the account at the beginning of this period? Should you wish to include compound interest in your calculations, you can use either oursavings calculator or loan calculator. He has also served as a Vice President for one of the top five Private Equity Firms. With over a decade of experience practicing public accounting, he specializes in client-centered accounting and consulting, R&D tax services, and the small business sector. Calculate the simple interest, then divide the result by the number of months covered by the period of the loan.

Calculating Interest: Principal, Rate, And Time Are Known

Bonds pay non-compounding interest in the form of a coupon payment. These coupon payments are not automatically reinvested/compounded and therefore are an example of simple interest. You can calculate simple interest by multiplying the principal amount by the interest rate percentage and the time being measured.

  • Therefore, the total amount paid by Ram to the lender is INR 116,000.
  • If you consistently pay late over the life of a loan, your final payment will be larger than the original estimate because you did not pay down the principal at the expected rate.
  • Sometimes there has been payment of only interest amount in case of long-term loans.
  • You can calculate simple interest by multiplying the principal amount by the interest rate percentage and the time being measured.
  • A is the total amount (principal + interest), P is the principal amount, r represents the rate of interest, and t stands for time.

Interest rates can be applied over different periods, such as monthly, quarterly, or bi-annually. This may seem high, but remember that in the context of a loan, interest is really just a fee for borrowing the money.

With his wife and two feline overlords, he also maintains a blog,, about wandering and wondering about the world in retirement. Use our simple interest worksheet to find the amount of interest in the following simple interest scenarios. “This is helpful for me as this allows us to answer the questions and we can also ask any question.” Thanks to all authors for creating a page that has been read 1,219,438 times. For more information about each aspect of the equation, keep reading. Include your email address to get a message when this question is answered.

How To Calculate Simple And Compound Interest

It multiplies the original amount of the loan, which is called the principal, by a specified percentage to arrive at the amount of total interest due over time. The period must be expressed for the same time span as the rate. If, for example, the interest is expressed in a yearly rate, such as in a 5% per annum interest rate loan, then the number of periods must also be expressed in years. Note that sometimes changes to interest rates may be expressed in basis points .

Sky Ariella is a professional freelance writer, originally from New York. She has been featured on websites and online magazines covering topics in career, travel, and lifestyle.

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