How do I calculate effective interest rate in Excel?
Michael Gray
Updated on February 09, 2026
Effective Interest Rate = (1 + i/n)n – 1
- Effective Interest Rate = (1 + 9%/365) 365 – 1.
- Effective Interest Rate = 9.42%
How do you calculate effective interest rate with compensating balance?
Example: Assume the interest rate on a compensatory balance loan has an interest rate of 5 percent, a principal of $100,000, and a compensatory balance of $5,000. Effective interest rate = $5,000/($100,000 – $95,000) = $5,000/$95,000 = 0.0526 = 5.26 percent.
How is the formula for effective interest rate calculated?
The formula for effective interest rate can be derived on the basis of the stated rate of interest and the number of compounding periods per year. Mathematically, it is represented as, Let’s take an example to understand the calculation of Effective Interest Rate in a better manner.
How to calculate interest on a new loan?
When taking out a new loan, keep track of the interest rate, especially if it’s a variable interest rate, which has the ability to change over the course of the loan. If you don’t know your interest rate, there are ways to figure out the interest rate or the amount of interest that will be paid over time.
How to calculate the annual interest rate on a credit card?
To calculate the effective annual interest rate of a credit card with an annual rate of 36% and interest charged monthly: 1. Stated interest rate: 36% 2. Number of compounding periods: 12 Therefore, EAR = (1+0.36/12)^12 – 1 = 0.4257 or 42.57%. Why Don’t Banks Use The Effective Annual Interest Rate?
How to calculate the effective interest rate per compounding period?
Where r is the interest rate per period in decimal form so R = r * 100 and, i is the effective interest rate in decimal form so I = i * 100. P is the rate per compounding period where P = R/m. Period. commonly a period will be a year but it can be any time interval you want as long as all inputs are consistent.
