How Often Should You Send Marketing Emails? A Simple Way to Find Your Number

How often should you send marketing emails? For most businesses the answer falls between one email a month and one a day, and the right spot depends on your audience, your segments and what each extra send earns. Start with the range for your business type, then test your way to a number.

Most advice gives you one figure and stops there. One figure can't fit a B2B software firm and a clothing store at the same time. This guide gives you starting ranges, the maths behind each extra send and a four-week test you can run on your own list.

One limit up front. No benchmark replaces your own data, so treat every range below as a starting point to test, not a rule.

How often should you send marketing emails by business type

Most B2B companies do well with one to two emails a week. Ecommerce brands often send two to four. Professional firms and local services usually land at two to four emails a month. Your list's behaviour will move the real answer more than your industry will, so use the table below as a first guess.

Business type	Starting cadence	Why it fits
B2B services and software	1 to 2 emails a week	Buyers are busy and decisions take weeks
Ecommerce and retail	2 to 4 emails a week	New products and offers give you steady reasons to write
Professional and local services	2 to 4 emails a month	Fewer purchase moments, so each email needs a clear point
Newsletters and publishers	Weekly or daily, as promised	The schedule is what subscribers signed up for
Nonprofits and memberships	2 to 4 emails a month	Appeals work best when updates sit between them

Start at the low end of your range for the first month. Subscribers forgive a quiet inbox faster than a crowded one, so you can always add sends later. However, long silences carry a cost too. A subscriber who hears nothing for months often forgets signing up, and your next email draws a spam complaint instead of a click.

Email send frequency and revenue: the maths behind each extra send

Every extra email earns some revenue and costs you some subscribers. Add a send only when the revenue it brings in beats the future value of the people who leave because of it. The calculation takes five minutes with numbers you already have.

Here is a worked example with illustrative figures. Swap in your own.

• List size: 20,000 subscribers.
• Email revenue: $8,000 a month, which is $0.40 per subscriber per month or $4.80 a year.
• Revenue per extra send: $250. This sits below your average send because later emails reach fewer buyers.
• Extra unsubscribes per send: 0.25%, or 50 people.

Adding one send a week for a year means 52 extra sends. At $250 each, that brings in $13,000. It also costs about 2,600 subscribers. On average each one leaves halfway through the year, so each takes about $2.40 of future revenue along. That is $6,240 lost, which leaves a net gain of $6,760.

So the extra send pays here. Change one input and the answer flips. If the extra send earns $100 instead of $250, the gain falls to $5,200 and the net turns negative at $1,040. That's why you measure revenue per extra send instead of assuming it matches your average.

So how often should you send marketing emails once you have these numbers? As often as the next send still pays. The model leaves out spam complaints and sender reputation, which are harder to price, so use it to compare options rather than to set a final figure.

Email list segmentation: give each group its own cadence

One cadence for the whole list overloads casual readers and under-serves your best buyers. Email list segmentation fixes that by sending more to people who engage and less to people who don't. Building those segments and the flows behind them is where our email marketing service usually starts.

So how often should you send marketing emails to each group? A simple four-group split covers most lists:

• New subscribers (first 14 days): three to five emails in a welcome series. Interest peaks right after sign-up, so this group tolerates the highest frequency you will ever send.
• Engaged buyers (clicked or bought in the last 60 days): the top of your range.
• Casual readers (clicked in the last 90 days, no purchase): the bottom of your range.
• Lapsed subscribers (no click in 120 days): one or two win-back emails, then stop. Sending past that point raises complaints without adding revenue.

Define engagement by clicks and purchases, not opens. Apple's Mail Privacy Protection loads emails automatically for many iPhone users, which inflates open counts and hides who actually reads you.

Email vs SMS: why the same cadence doesn't carry over

Text messages arrive on a more personal channel, so people tolerate fewer of them. Many senders keep texts to a handful a month while emailing weekly. If you also text, how often should you send marketing emails compared with texts? Keep email as the higher-frequency channel. Give each channel its own cadence and avoid sending the same message on both within a day. Our breakdown of email marketing vs SMS marketing covers when each channel earns its place.

Email unsubscribe rate and spam complaints: when to slow down

Watch two numbers after every change: your email unsubscribe rate per send and your spam complaint rate. Gmail and Yahoo expect bulk senders to keep complaints under 0.3%, and Google advises staying below 0.1%. Climb toward those limits and your emails start landing in spam folders. So how often should you send marketing emails without drawing complaints? Let these signals decide.

These signs tell you that you send too often:

• Unsubscribes per send rise after you add an email. No universal threshold exists, so compare against your own baseline from the previous eight weeks.
• Click rate falls on every send, not only the new one. That means the extra email is eating into the others.
• Replies and complaints mention volume. Read them. A subscriber who writes "too many emails" is handing you free research.

These signs tell you that you send too rarely:

• Complaints from people who don't remember signing up. They forgot you during the quiet stretch.
• Revenue per send looks strong, but total email revenue stays flat. You may only write when you have a promotion, and the list goes cold in between.

How often should you send marketing emails? Run a four-week test

Split one segment in half. Keep one half at the current cadence and give the other half one extra send a week for four weeks. Compare revenue per subscriber, unsubscribes and complaints. Keep the extra send only if net revenue rises and the other two stay flat.

Here is the process step by step:

1. Pick one segment. Use a group with enough people to show a difference, such as your engaged buyers.
2. Split it at random. Group A keeps its current schedule. Group B gets one extra email a week.
3. Hold content quality constant. The extra email should be as good as your usual ones, or the test measures your writing instead of your frequency.
4. Run it for four weeks. B2B lists with long buying cycles need six.
5. Compare per subscriber, not per send. Look at revenue or pipeline per person, plus unsubscribes, complaints and clicks.

Test one change at a time. If you add a send and change your subject-line style together, you won't know which one moved the numbers. If each half holds only a few hundred people, treat the result as a hint and run it for longer.

Check again 60 days later. Fatigue shows up slowly, and a send that looked profitable in week four can still raise your lapsed count by week eight.

Preference centres and gradual changes protect deliverability

Jumping from one email a month to one a day is the fastest way to earn complaints. Mailbox providers watch for sudden jumps in volume, and subscribers notice them even sooner. Add one send at a time and hold each step for at least two weeks.

A preference centre lets people choose their own frequency, such as weekly, monthly or only big announcements. So how often should you send marketing emails to someone who asked for less? Give them the monthly option. Many people who would unsubscribe from a weekly email pick it, and you keep a subscriber you would otherwise lose.

Keep your send days steady too. Predictable timing, like Tuesday and Thursday mornings, teaches subscribers when to expect you.

Where to start this week

You can set a sensible cadence in an afternoon:

1. Pull the last eight weeks of data: sends, revenue, unsubscribes and complaints for each one.
2. Split your list into the four groups above.
3. Set casual readers at the bottom of your range and engaged buyers at the top.
4. Start a four-week test on one segment.

Once the first test ends, you will have a data-backed answer to the question "how often should you send marketing emails?" for your own list. If you would rather have someone build the segments and read the results with you, talk to the AiM Growth team about your list.