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
An accessory building is an outdoor structure used by the occupants of the main building or house. They have different functions and can be detached or attached to the main building on the ...
Same as term industrial park: Usually a fairly large site zoned and planned for the purpose of industrial development and located outside the main residential area of a city. Industrial ...
The term agricultural property means a type of land that has been designed or is permitted to engage in agricultural activities. Also referred to as agricultural land, agricultural ...
A real estate owner's policy and rules regarding the use of the property by the tenant. In insurance, a contract that provides coverage against given risks. Coverage limits for real ...
Contractual provision specifying a dollar amount or rate an individual to the contract must pay for not conforming to its terms. An example is the fee charged for a late mortgage payment. ...
Periodic expenditures undertaken to preserve or retain a property's operational status for its originally intended use. These expenditures do not improve or extend the life of the property. ...
Written enumeration of the desired selling prices associated with homes or office buildings for sale. The prospective buyer can then determine if the properties for sale are within his ...
A home seller and a home buyer agreed upon a fair market value and the deal is off to closing the sale. One of the next steps is running a title search. But what is a title ...
Private company established in 1957 and headquartered in Milwaukee, WI, providing private mortgage insurance (PMI) to mortgage lenders granting mortgages to mortgagors not having at least a ...
Have a question or comment?
We're here to help.