Single-column sign-up forms win

Two-column forms look efficient. First name on the left, last name on the right. Saves vertical space. Looks balanced. And converts worse almost every time.

Eye-tracking studies show that people process forms top to bottom. A single column follows this natural pattern. Two columns force a zigzag: left field, right field, back to left, back to right. Each zigzag is a micro-decision about where to look next.

One B2B company switched their sign-up form from two columns to one. Same fields, same copy, just stacked vertically instead of side by side. Completions increased 15%. The form was technically longer on the page. It didn't matter. It was easier to process.

The exception: very short, related fields like first name and last name can sit side by side on desktop without confusion. But the moment you have different field types (text input next to a dropdown, email next to a phone number), go single column.

On mobile, this is even more critical. Two-column forms on a phone screen mean tiny input fields that are hard to tap. Most responsive forms collapse to single column on mobile anyway. Just make that the default everywhere.