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September 10, 2024

How to Calculate Member Retention Rate: A Step-by-Step Guide

Calculating your member retention rate

Member retention is a key component of your association’s success – if too many members are lapsing and leaving, pretty soon you won’t have any! It’s important to monitor your member retention rate to see if you’re seeing positive or negative trends over time so you can get ahead of it if member satisfaction is waning.

But how do you calculate your member retention rate in the first place? Once you have your membership retention numbers on hand, calculating your member retention rate is simple (don’t worry, math-haters, we’ll help you get there with a step-by-step guide).

How to Calculate Your Member Retention Rate

Though there are more complicated formulas out there, we’re keeping it simple with a proven classic:

((ME-MN)/MS) x 100

Let’s break down the formula a bit for those of us who haven’t taken a math class in a while.

  • ME = Members at the end of a time period
  • MN = New members acquired during a time period
  • MS = Members at the start of a time period

Step #1: Choose a Time Period

To calculate your retention rate, first identify the specific time period you’re focusing on. Perhaps you’re looking at the last year, maybe you’d rather just examine the last six months, or maybe you’re interested in quarterly or monthly retention rates. Either way, the formula is the same; it’s just your figure at the end that will vary.

Step #2: Check How Many Members You Had

Next, you need to know how many members you had at the end of that period of time. This number is represented by ME in our formula.

Tip: If you’re calculating your current retention rate it might be as easy as determining how many members you currently have.

Step #3: Check How Many Members You Recruited

You also need to know how many new members you recruited during your period of interest, so that you don’t include them as retained members in your final retention measurement. This number is represented by MN in our formula.

Now you’re ready to do your first calculation: subtract your MN number (new members acquired during the period) from your ME number (members at the end of the period).

Step #4: Check How Many Members You Had at the Beginning

The final number you need to know is how many members you had at the start of your period of interest. This number is MS in the formula.

For your next calculation, you will take the solution to Step 3 (ME-MN) and divide it by how many members you had at the start of your period (MS). This covers the first part of the equation: ((ME-MN)/MS).

Step #5: Run the Equation

Finally, you want to turn that number into a percentage by multiplying it by 100. Your final number is your member retention rate for the time period you chose.

See? That wasn’t so bad, was it? Now, to illustrate things even further, let’s look at an example.

Remember, our formula is ((ME-MN)/MS) x 100.

Member Retention Rate Example

Your membership organization started the year with 500 members. Over the course of a year, you gained another 50 members and lost 20.

Your time period = 1 year

  • ME (Members at the end of one year) = 500+50-20 = 530
  • MN (Members acquired in one year) = 50
  • MS (Members at the start of one year) = 500

((530-50)/500) x 100

(480/500) x 100

0.96 x 100

= 96%

Your organization’s member retention rate is 96 percent. Pat yourself on the back, that’s pretty good.

Now all that’s left to do is plug in own numbers! And once you’ve calculated your retention rate, let’s talk about member retention rate benchmarks, why you should care, and tactics for improvement…

Now What? How To Use Your Member Retention Rate

Editor’s note: This post was originally published in March 2014 by Joshua Paul. It has since been refreshed to make sure we’re giving you the latest and greatest.

Elizabeth Bell
Elizabeth Bell

Elizabeth Bell is a freelance Content Marketer with a passion for online communities, technology, and sharing strategies for how to use both effectively. She’s Higher Logic’s former long-time Content Marketing Manager.  When she’s not writing, you’ll probably find her cooking, reading, gardening, or playing volleyball.