How to A/B Test Your Church Emails for Better Results

Your church sends an email on Thursday afternoon.

One version has the subject line:
“This Sunday at Our Church”

Another version says:
“You’re Invited to Something Bigger Than Sunday”

Both emails contain almost the exact same content.

But one gets opened 38% more.

That is the power of A/B testing.

Most churches assume email success is random. Either people open it, or they do not. Either engagement happens, or it does not. But often, the difference between an ignored email and an effective one lies not in the information itself.

It is the way the information is presented.

A/B testing helps you stop guessing and start learning what actually connects with your church.

And the good news is you do not need a giant communications team or advanced marketing software to do it well.

You just need a consistent process.

What Is A/B Testing?

A/B testing is simply comparing two versions of something to see which performs better.

You create:

• Version A

• Version B

Then you send each version to a portion of your audience and measure the results.

Most email platforms like Mailchimp, Constant Contact, ConvertKit, Flodesk, and Kit already include built-in A/B testing tools.

You do not need to test everything at once.

In fact, you should not.

The goal is to isolate one variable at a time so you can clearly identify what made the difference.

Why Churches Should Care About A/B Testing

Church communication is not just about delivering information.

It is about helping people:

• Feel connected

• Take next steps

• Stay engaged

• Experience community

• Encounter truth consistently

If more people open and engage with your emails:

• More people show up

• More people know what is happening

• More first-time guests stay connected

• More volunteers respond

• More ministry opportunities gain momentum

A/B testing helps you learn:

• What your church audience responds to

• What language resonates

• What timing works best

• What motivates action

Instead of making communication decisions based on opinions, you start making them based on actual behavior.

The Biggest Mistake Churches Make with Email Testing

They test too many things at once.

If you change:

• The subject line

• The graphics

• The button text

• The send time

• The email layout

…you will never know what caused the improvement.

Test one thing at a time.

That is how you build reliable data.

What Churches Should Test First

1. Subject Lines

This is the best place to start.

Why?

Because subject lines determine whether people open the email at all.

You can test:

• Short vs long subject lines

• Questions vs statements

• Casual vs direct tone

• Curiosity vs clarity

• Personalized vs non-personalized

Example

Version A:
“Sunday at Grace Chapel”

Version B:
“Why This Sunday Could Change Someone’s Week”

One may feel more compelling emotionally.

The other may feel more informative.

Your audience will tell you which they prefer through their behavior.

2. Send Times

Many churches assume:

• Thursday afternoon is best

• Sunday morning is best

• Wednesday morning is terrible

But your audience may behave differently.

Test:

• Morning vs evening vs afternoon

• Tuesday vs Thursday

• Lunch hour vs after work

A church full of young families may open emails at completely different times than a church with retirees.

Do not assume.
Measure.

And don’t always trust the time that is being “recommended” by the email platform. These platforms are used by hundreds of thousands of businesses around the world. The recommendation is not built on your people’s desire to engage…but it is built on when people are possibly looking for that coupon emailed to them by the sales company.

3. Call-to-Action Buttons

Your CTA matters more than most churches realize.

Compare:

• “Learn More”

• “Save Your Seat”

• “Join Us Sunday”

• “Register Now”

• “Take Your Next Step”

Specific language often outperforms generic wording.

Weak CTA:

“Click Here”

Stronger CTA:

“Plan Your Visit”

One feels passive.
The other feels purposeful.

4. Email Length

Some audiences prefer quick, skimmable emails.

Others engage deeply with storytelling and pastoral encouragement.

Test:

• Short-form emails

• Longer story-driven emails

• Bullet-point layouts

• Conversational paragraphs

You may discover your congregation responds best to:

• concise updates

• personal stories

• practical resources

• devotional encouragement

• clear action steps

5. Preview Text

Most churches ignore the preview text completely. But the preview text is often the second most important line in the email after the subject line.

This is the small sentence people see beside or below the subject in their inbox.

Example

Subject:
“3 Things You Need Before Sunday”

Preview Text:
“Plus an important update for families and volunteers.”

That combination creates curiosity and context.

Metrics Churches Should Actually Watch

Not every metric matters equally.

Focus on the numbers that reveal engagement.

Open Rate

How many people opened the email.

Helpful for testing:

• Subject lines

• Send times

• Preview text

Click-Through Rate (CTR)

How many people clicked a link or button.

Helpful for testing:

• CTA wording

• Button placement

• Content structure

Conversion Rate

How many people completed the desired action.

Examples:

• Registered

• Signed up

• Filled out a form

• Planned a visit

This is often more important than opens.

Because the goal is not just attention.
The goal is action.

A Simple Church Email Testing Process

Here is a practical framework your church can start using immediately.

Step 1: Choose One Goal

Ask:
“What are we trying to improve?”

Examples:

• More opens

• More registrations

• More volunteer signups

• Better engagement

Step 2: Test One Variable

Only change one element.

Examples:

• Subject line

• Send time

• CTA button

• Email length

Step 3: Send to Similar Groups

Most email platforms automatically split audiences evenly.

This matters because you want accurate comparisons.

Step 4: Measure Results

Look for:

• Higher opens

• More clicks

• Better conversions

Step 5: Document What You Learn

This is the step most churches skip.

Create a simple spreadsheet or running document.

Track:

• What you tested

• Which version won

• What you learned

Over time, you will build a communication playbook unique to your church.

What We Learned Testing Church Emails

In many church communication environments, we have seen patterns emerge repeatedly:

• Story-driven subject lines often outperform announcement-style subject lines

• Emails written conversationally usually outperform corporate-style formatting

• Clear next steps outperform vague language

• Simpler layouts often outperform over-designed emails

• One strong CTA performs better than six competing actions

But every church audience is different.

That is why testing matters.

Your church does not need to copy another church’s strategy.

You need to discover your own audience’s behavior.

Do Not Obsess Over Perfection

A/B testing is not about becoming a marketing machine.

It is about becoming a better communicator.

You are learning how to:

• remove friction

• improve clarity

• help people engage more consistently

• serve your congregation better

Small improvements compound over time.

A 5% increase in opens this month may turn into:

• stronger volunteer engagement

• better event attendance

• more first-time guest retention

• healthier church communication systems

Start Small This Week

Do not overcomplicate this.

This week:

• Test two subject lines

• Try a different send time

• Rewrite one CTA button

That is enough to start learning.

The churches with the strongest communication systems are not always the churches with the biggest teams.

Often, they are simply the churches paying attention.

And A/B testing helps you pay attention to what actually works.