One of the most  popular questions that we get in conversations with email marketing beginners is about email frequency. They all want to know the same thing: how often should you send your email campaigns?

In fact, the right email frequency can have a big impact on your email campaign success. The challenge is to find the balance between staying at the front of your customer’s mind and not becoming too spammy.

Email frequency is one of the many aspects that we analyzed in our recent Omnisend research based on our customer data. This time, we focused on the open and click rates by looking at the frequency of the email campaigns our users are sending out.

Email frequency of Omnisend clients

The Omnisend ecommerce email marketing platform is focused on small and medium-sized businesses.

The majority of our clients are new retailers who sell apparel, accessories, books and small electronic devices. They start implementing email marketing with a small database (up to 5,000 subscribers) and send email campaigns gingerly – about once a month to once a week.

As you can see in the chart below, almost a third of our clients (32%) send email campaigns once per month, and a majority (54%) do it 2-4 times a month.

The email frequency for Soundest clients as a percentage

This is good news, and quite natural: the optimal number of emails sent per month should be 2-4, which means a weekly or bi-weekly campaign or newsletter.

This also goes in line with the fact that the smaller the brand is, the fewer emails they send, while the larger brands send more emails.

In our 2016 Omnisend Research data, we noted that online stores that have more than 5,000 subscribers send email campaigns 2-7 times per month. Online stores that send emails every day or twice per week usually have 50,000 subscribers or more.

They are bigger, with significantly more products. Naturally, there is more content to showcase in everyday campaigns.

Customer reaction to email frequency

It’s one thing is to send an email campaign once, twice, or four times a month. It’s another thing entirely to have those email campaigns be successful.

So, how do our brands’ subscribers respond to the different emailing frequency?

Let’s look at the chart below. At first sight, it seems like the more often you send emails, the less willing your subscribers are to open and click on them.

Open and click rates compared to email frequency based on Soundest Research 2017

However, is this really the case?

Let’s assume that you have 1,000 subscribers and send them a newsletter once a month.

Your subscribers are engaged with your brand and the subject line is good, so your open rate is 28% and click rate is 7%. This means that 280 subscribers open your email each month and 70 click somewhere.

The average order count for monthly newsletters is 1.64, so you end up with about 2 purchases for the month.

The average order count based on email frequency

Now, if those same subscribers get your emails four times a month, the average order count per campaign goes up to 4.79. Each time you send a campaign, you get about 5 orders.

If you multiply that by the four campaigns you send a month, that means that at the end of the month you get about 20 orders in total.

So while the open rate does go down as the email frequency increases, the orders each month go up.

This is even more dramatic when we only focus on those campaigns that have at least 1 order per month, as in the chart below:

Average order count per campaign (at least 1 order) based on email frequency per month

Looking at both charts for the average order count per campaign, we can see that customers positively react to emails sent to up to 19 times a month.

While the open and click rates drop dramatically as the email frequency increases, the average order count per campaign goes up steadily (up to 19 emails/month).

Email marketing frequency risks and opportunities 

This article will probably inspire you to change how often you send out your email campaigns, which is good. But before changing your email frequency, take these risks and opportunities into consideration.

If your emails are not frequent enough:

  1. No matter how cautious you are with your emails, by sending too few promotional emails you miss the opportunity to sell more . This is a fact.
  2. The more emails you send, the more visible your brand is. Even if customers do not open your email, it helps to stay at the front of their mind.
  3. Rarely sending emails may put your reputation at risk. Consistency and frequency are important in building your online reputation.
  4. Your subscribers will forget about you if you do not engage with them for a while.

On the other hand, if you email too much:

  1. Content cannot suffer just by sending frequency. Make sure your emails continue providing value to subscribers. If you keep sending the same offers, they will unsubscribe and report your campaign as spam, which will affect your sender’s reputation. For more frequent communication, you need content.
  2. Engagement with every single campaign will drop. Customers will start to skip your campaigns and open them less.
  3. If you send too many emails, customers will unsubscribe from your newsletter. After they opt out, you lose permission to market them via email.

How can I find the right email frequency?

The survey data shows that sending email campaigns once or twice a week is the best frequency for better sales .

However, I bet this isn’t the best result you can achieve. Here’s what else what you can do:

Split your subscribers into two groups.

Let the first control group receive the same frequency of emails as you send currently. Start to experiment with the second group – try sending emails twice as often compared to the first group and see what happens.

Bear in mind that for noticeable results you may need a month or even two. It depends on your current frequency.

To determine your best frequency, you need to monitor the engagement and performance of the two subscriber groups separately and compare the results over the period: open and click rate, unsubscribe rate and conversions. In this way you will be able to find your best email frequency.

I hope this helps in your email marketing and sales. Check out the best time to send email campaigns.

You can also check out our 2017 Omnisend Research in our email marketing infographic.

Do you care about email marketing for e-commerce?
We do. Join our club and get relevant stats, tips & how-to's twice per month.
Thank you for subscribing.
See you soon!
Please enter your email!
Email is incorrect. Please revise.
Something went wrong!