Lead-Gen Signup Page A/B Tests: 5 Results

Of 5 measured signup page tests, 4 won, none lost and 1 was flat, and the one clear pattern is that removing friction from the first click and the hardest field beats rearranging the page.

Vandebron's simpler date-of-birth field lifted sign-ups +16.3%, and Booking.com's sticky mobile CTA on its partner sign-up page gave +36% clicks to start registration.

Five results is thin evidence, so use these as tested starting points for your own signup page rather than proof of what will work.

What a lead-gen signup page has to do

A signup page has one job: turn interest into a started registration, and then a finished one.

The visitor has usually decided they are interested, so the page mostly needs to stay out of the way.

That means a clear first step, an obvious button and form fields that are quick to fill in on a phone.

Most-tested changes on the signup page

The five tests here cover three kinds of change:

• The call to action. Two Booking.com tests changed the CTA's wording and position.
• Form fields. Vandebron and PureGym each fixed one field that slowed people down.
• Page order. Booking.com moved the registration steps higher on the page.

Biggest measured wins

Fix the field people get stuck on

Vandebron, an energy supplier, found that its date-of-birth field was causing drop-offs.

A simpler date-of-birth field gave +16.3% sign-ups, -8.5% exit rate on the step and -80% drop-offs on the date field.

PureGym replaced a dropdown of 450 gyms with a search field at sign-up and saw +3.4% conversion.

A long list is hard to scroll on mobile; typing a town is faster.

Make the first click easy and specific

Booking.com's partner sign-up page tested a sticky mobile CTA, which kept the button on screen as visitors scrolled. Clicks to start registration rose +36%.

The CTA wording mattered as well. In a wording test, 'Start registration' did best, while 'Sign up today' cut clicks by about 10%.

A button that says what happens next seems to beat a generic push.

Tests that lost or were flat (and why)

No signup page test here lost. The flat one was Booking.com moving the registration steps higher on the join page, which brought no improvement.

The lesson is that explaining the process earlier did not help on its own, while making the button easier to reach did.

Visitors who are ready to sign up need the action more than the instructions.

A signup page checklist built from the results

• Find the form field with the most drop-offs and simplify it first.
• Replace long dropdowns with a search or type-ahead field.
• Keep the main CTA visible on mobile, for example with a sticky button.
• Write the CTA as the next step ('Start registration'), not a general appeal.
• Do not expect reordering the page to move sign-ups much by itself.
• Measure finished sign-ups, not just clicks to start.

For more on form fields, see the lead form tests, and for every lead-gen page type, the lead-gen A/B test hub.

Tools to run these tests

Most of these changes, such as CTA copy, a sticky button or a new field type, can be run in a standard A/B testing tool.

Pair it with form analytics or field-level tracking: Vandebron's win came from spotting which field caused the drop-offs before testing a fix.