Effective Interest Rate
The term effective interest rate is the actual return from a savings account or any investment where you pay interest when considering the effects of compounding costs over time. Through an effective interest rate, you can fully and correctly determine the real percentage rate that you own on a loan’s interest, a credit card, or any other debt type.
An effective interest rate is also referred to as an effective annual interest rate, the annual equivalent rate, or the effective rate.
The Effective Interest Rate Formula:

With:
i = Nominal Interest Rate
n = Number of periods
What does the Effective Interest Rate Mean?
When you look at loans, the way through which they are advertised will give you two types of information. Firstly, we’ll have the nominal interest rate, which doesn’t consider the effects compounding interest or fees have on the financial product. Secondly, and the one we focus on now, the effective interest rate, which gives you the real return paid on savings of the actual cost of a loan because it does take into account the effect fees and compounding interest have on the financial product.
For that exact reason, knowing and understanding what the effective interest rate means is important. Through a proper understanding of the effective interest rate, you can compare offers more accurately to make an informed decision based on the result.
How to Find the Effective Interest Rate?
To adequately explain how to find the effective interest rate from any financial product’s promotional information, we will look at two examples. Firstly, we’ll have Loan A that has a 5% interest rate that’s compounded monthly. Secondly, we’ll have Loan B with a 5.1% interest rate that’s compounded bi-annually.
Both of these loans are advertised with their nominal interest rate. Remember, this is the one that doesn’t take into account the effects fees and compounding interest has on the loan. To calculate the effective interest rate, we’ll use the formula shown above.

While the nominal interest rate for Loan A is smaller than that of Loan B’s, the effective interest rate from Loan B is lower than that of Loan A’s. This occurs because Loan B has fewer compounding times over the course of a year.
Popular Real Estate Terms
Ownership rights to the minerals or other precious resources, such as petroleum, in one's property. A property owner having the mineral rights to the property can do one of three things ...
Small navigable body of water having limited water access and egress. Coves are often secluded and acts as a boating anchorage. Concave or cratered corner molding. A hollow cornice. ...
Latin term meaning legal capacity to act on behalf of oneself. ...
A fully amortized mortgage necessitating periodic payments of both interest and principal. In the early years of the loan, the share of principal is smaller and the interest larger, a ...
The appraisal approach is used to estimate the value of an asset, based on various factors to reach the closest educated guess of the asset. While an appraisal approach does consider the ...
Mock closing; all information is available prior to an actual closing in order to insure all documents are properly executed by the appropriate parties. A preclosing is normally used only ...
Contractor who constructs new roofs or repair old ones. ...
A corporation that owns housing units and whose tenants purchase shares in the corporation equivalent to the value of their housing unit. Also called co-ops. ...
A cooperating broker or agent defines a real estate broker who helps another broker in a private property transaction. Typically, the cooperating broker represents the seller and is ...
Have a question or comment?
We're here to help.