Year-Over-Year Percentage Increase Calculation

Demonsguile

New Member
Joined
Oct 13, 2011
Messages
39
I'm looking for help in determining the formula for year-over-year (YOY) percentage increase over multiple years. And, I'm only given the original value and the multi-year sum value. For example, in 2022 I spent $75,000 for maintenance on a software package. Now, I want to renew for three years instead of a single year. The pricing on the 3-year package is $280,000. A standard price increase formula would look like =(New-Old)/Old or (280k-225k)/225k = 24.44%, which is interesting, but it's not what I'm after. I want the percentage that each individual year was increased in order to arrive at the new cumulative value. In other words, what was the YOY increase for 2023, 2024, and 2025? In my example, the answer for each individual year would be a 11.34053% increase YOY.

Right now, I'm doing the guess-n-check method. I would love it if someone could help me with a formula so that I don't have to keep doing this.

Thanks,
DG
 

Excel Facts

How to fill five years of quarters?
Type 1Q-2023 in a cell. Grab the fill handle and drag down or right. After 4Q-2023, Excel will jump to 1Q-2024. Dash can be any character.
The formula for compound annualised growth rate is: (New/Old)^(1/n)-1

It is not possible to infer each annual change when the only knowns are the New, Old and periods (i.e., n) values.
 
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