# How to Calculate Effective Interest Rate in Excel with Formula

A lender separates out these additional fees in order to drive down the stated interest rate on a loan – a practice that is more likely to attract a borrower. The concept is also useful for comparing several alternative lending or borrowing arrangements that incorporate different interest rate calculations. Therefore, it can be clearly seen that annual yield increases with the increase in the number of compounding variable manufacturing overhead variance analysis happening per year. As such, the option of daily compounding will offer the best yield for John (effective interest of 9.38% against the stated rate of interest of 9%). Note that continuous compounding rarely occurs on loans or other financial instruments. For example, a mortgage loan typically has monthly or semi-annual compounding, while credit card interest is applied daily in most cases.

## What is the Effective Annual Interest Rate?

It is important to understand the concept of an effective interest rate because it is a vital metric for an investor or another financial user. The investors tend to use the effective interest rate predominantly as it is the actual yield received from an investment. As such, the investors lay greater emphasis on the number of compounding https://www.quick-bookkeeping.net/ per year as a higher number of compounding means greater yield. On the other hand, the perspective changes for a borrower who seeks a lower number of compounding per year as it would keep their interest expense low and result in better profitability. Let us take the example of an investment with the stated rate of interest of 10%.

## What Is an Effective Annual Interest Rate?

The bank has told you that their interest rate (stated rate or annual percentage rate) was 12%. The table below shows the difference in the effective annual rate when the compounding periods change. The annual interest rate and effective interest rate can differ significantly due to compounding. The effective rate can help you figure out the best loan rate or which investment offers the best return. The quarterly compounded rate of 7.7% is equivalent to 7.7741% compounded semi-annually.

## EAR Example

- When comparing interest rates on a deposit or a loan, consumers should pay attention to the effective annual interest rate, not the headline-grabbing nominal interest rate.
- Banks will advertise the effective annual interest rate of 10.47% rather than the stated interest rate of 10%.
- Revisiting the opening scenario, comparing the interest rates of 6.6% compounded semi-annually and 6.57% compounded quarterly requires you to express both rates in the same units.
- When you have a nest egg or investment, however, the effect of compounding becomes your friend.

To compare interest rates fairly and select the best, they all have to be expressed with equal compounding. This section explains the concept of an effective interest rate, and you will learn to convert interest rates from one compounding frequency to a different frequency. If all of your possible loans are compounded in the same manner, selecting the best interest rate is a matter of picking the lowest number. However, when interest rates are compounded differently the lowest number may in fact not be your best choice.

It is also called the effective interest rate, the effective rate, or the annual equivalent rate (AER). In this case the 3% stated interest rate is equal to a 3.04% effective interest rate. When https://www.quick-bookkeeping.net/what-is-a-favorable-variance-what-it-means-for/ you take out a loan, whether it’s a personal loan, payday loan, mortgage, or auto loan, you will see various interest rates, including the stated interest rate and annual percentage rate.

The effective interest rate of 4%, compounded quarterly, is approximately 4.06% with a periodic rate of 1%. On the other hand, if compounded monthly, the effective interest rate would be approximately 4.074%, with a periodic rate of 0.3333%. The effective annual interest rate may also be referred to using other terms such as the effective the difference between fixed and variable costs interest rate (EIR), annual equivalent rate (AER), or effective rate. The rate of 6.6% compounded semi-annually is effectively charging 6.7089%, while the rate of 6.57% compounded quarterly is effectively charging 6.7336%. The better mortgage rate is 6.6% compounded semi-annually, as it results in annually lower interest charges.

Although it can be done by hand, most investors will use a financial calculator, spreadsheet, or online program. Moreover, investment websites and other financial resources regularly publish the effective annual interest rate of a loan or investment. This figure is also often included in the prospectus and marketing documents prepared by the security issuers. Understand the psychological marketing approach of communicating effective annual interest rates.