How to Run A/B Tests on Headlines, CTAs, and Pricing

A/B testing means comparing two versions of one element to see which performs better. For headlines, CTAs, and pricing, the key is to change only one variable at a time so you can clearly attribute any performance difference to that change.

1. Start with a clear goal

Decide what you want to improve, such as:

• Headline: more clicks or better engagement
• CTA: higher click-through rate or conversion rate
• Pricing: more purchases, sign-ups, or leads

Pick one primary KPI for each test.

2. Form a simple hypothesis

Write a testable statement.

Examples:

• Headline: “A benefit-led headline will increase CTA clicks versus a generic headline.”
• CTA: “A higher-contrast CTA button will increase clicks.”
• Pricing: “Displaying a monthly price instead of an annual-only price will improve conversions.”

3. Test one element at a time

Headlines

Try testing:

• Benefit-driven vs feature-driven headlines
• Short vs long headlines
• Formal vs more personal tone
• Different wording, such as:
  • “Save Time with Automated Reporting”
  • “Get Reports in Minutes, Not Hours”

CTAs

Try testing:

• Button copy: “Sign Up” vs “Get Started”
• Button colour or contrast
• Button size
• Placement on the page
• One CTA vs multiple CTAs

Pricing

Try testing:

• Price points, such as $19.99 vs $20
• Monthly vs yearly pricing display
• Discounts or promo codes
• Bundles vs single-plan offers
• Number of pricing tiers
• Highlighting one plan as the recommended option

4. Create a control and a variant

• Control (A): your current version
• Variant (B): the version with one change

Example for CTA testing:

• A: “Start Free Trial”
• B: “Get Started Free”

5. Split your audience evenly

Show each version to a comparable audience segment.

• 50% see version A
• 50% see version B

Keep traffic conditions as similar as possible.

6. Run the test long enough

Do not stop too early. Wait until you have:

• Enough traffic
• Enough conversions
• A stable result

If sample size is too small, the result may not be reliable.

7. Evaluate the result

Compare the versions using your chosen KPI.

Examples:

• Headline test: Which version got more clicks or time on page?
• CTA test: Which version drove more CTA clicks?
• Pricing test: Which version led to more sign-ups or purchases?

8. Keep the winner, then test again

Once you find a winner:

1. Implement it
2. Use it as the new control
3. Test the next idea

A/B testing works best as an ongoing process, not a one-off experiment.

Practical examples

Headline test

• A: “All-in-One Project Management Software”
• B: “Manage Projects Faster with One Simple Tool”

CTA test

• A: “Book a Demo”
• B: “See It in Action”

Pricing test

• A: S$29/month
• B: S$25/month billed annually

Common mistakes to avoid

• Changing more than one element at once
• Ending the test too early
• Using too little traffic
• Testing without a clear hypothesis
• Measuring the wrong KPI

Simple workflow

1. Choose one page or email
2. Pick one element: headline, CTA, or pricing
3. Write a hypothesis
4. Create A and B
5. Split traffic
6. Measure results
7. Keep the winner

If you want, I can also give you a step-by-step A/B testing template for headlines, CTAs, and pricing that you can copy and use straight away.